CN106994332B - Preparation and application of kapok fiber-based elastic foam material - Google Patents
Preparation and application of kapok fiber-based elastic foam material Download PDFInfo
- Publication number
- CN106994332B CN106994332B CN201710402218.3A CN201710402218A CN106994332B CN 106994332 B CN106994332 B CN 106994332B CN 201710402218 A CN201710402218 A CN 201710402218A CN 106994332 B CN106994332 B CN 106994332B
- Authority
- CN
- China
- Prior art keywords
- kapok fiber
- reaction
- elastic foam
- kapok
- fiber
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/20—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising free carbon; comprising carbon obtained by carbonising processes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
- B01J20/28014—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their form
- B01J20/28042—Shaped bodies; Monolithic structures
- B01J20/28045—Honeycomb or cellular structures; Solid foams or sponges
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2220/00—Aspects relating to sorbent materials
- B01J2220/40—Aspects relating to the composition of sorbent or filter aid materials
- B01J2220/48—Sorbents characterised by the starting material used for their preparation
- B01J2220/4812—Sorbents characterised by the starting material used for their preparation the starting material being of organic character
- B01J2220/485—Plants or land vegetals, e.g. cereals, wheat, corn, rice, sphagnum, peat moss
Abstract
The invention relates to the technical field of adsorption materials, and aims to provide a preparation method and application of a kapok fiber-based elastic foam material. The method comprises the following steps: putting the kapok fiber into a reaction kettle, adding a glutaraldehyde solution to completely immerse the kapok fiber, and continuously soaking; heating to carry out hydrothermal carbonization reaction, and naturally cooling after the reaction is finished to obtain a blocky brown elastic material; soaking and rinsing with deionized water and then absolute ethyl alcohol until the final soaking solution is colorless and transparent; and naturally airing to obtain the kapok fiber-based elastic foam material. The raw materials of the invention have rich sources and low price, and can make up the defects of preparing the carbon-based material by the traditional method; compared with the high-temperature carbonization treatment technology, the preparation process is simple, the production cost is low, and the like. The prepared elastic hollow foam with the amphiphilic characteristic has good hydrophilic performance on the basis of keeping the original lipophilic performance, has obvious adsorption effect on various dyes in oil, organic solvents and aqueous solutions, and has high repeated utilization rate.
Description
Technical Field
The invention relates to an adsorption material technology using biomass as a carbon source, in particular to a preparation method and application of a kapok fiber-based elastic foam material prepared by hydrothermal carbonization.
Background
With the continuous acceleration of industrialization, the environment on which human beings rely to live is greatly polluted. The pollution involves water, air, soil, etc. Wherein, the water pollution is mainly caused by leakage of dyes, crude oil, product oil and the like.
Macroscopic materials constructed from carbon-based materials (e.g., carbon-based materials such as sponges, foams, aerogels, hydrogels, etc.) have wide applications in the fields of adsorption and separation, environmental remediation, etc., making them of great interest to researchers over the past decade. Carbon nanotubes and graphene with large specific surface area and unique electrochemical properties are excellent basic structural member units, but mass production of carbon nanotubes and graphene materials is still very challenging. In recent years, natural materials (such as cellulose and starch) have the advantages of environmental friendliness, mass production, low cost and the like, can be prepared into three-dimensional functional materials as basic structural units, and are widely applied to the field of adsorption separation. But the further popularization is hindered due to the complex processing technology.
Large size tube structures are of particular interest in the field of adsorption and separation. Compared with the nano tube, the large-size tube structure provides a huge channel, so that the contact surface is increased, and the capillary condensation effect is achieved. At present, the three-dimensional carbon-based material composed of large-size tube structures is few and few. In addition to the above-mentioned features, the properties of the surface of the material are also of critical importance, which determines the wettability of the material in different media, which greatly influences the practical application of the material. The surface characteristics of the material are mainly determined by the molecular structure of the surface of the material, and different properties can be endowed to the material by changing the surface groups of the material: super-hydrophobic, super-hydrophilic, amphiphilic; at present, the post-modification method is used for performing post-modification on the surface of a preformed large-size pipe structure material, for example: electrostatic effects, hydrogen bonds, covalent bonds, functional groups, etc. are added to alter their surface characteristics. However, the additional chemical modifications to these macrostructures make the experimental procedure cumbersome and at the same time unfavorable for large-scale production.
Kapok fiber is a natural tubular cellulose material growing in kapok tree fruit fiber, has a unique thin-wall large hollow structure, has a hollowness of over 86 percent, is the finest, lightest and highest hollowness of natural ecological fiber, and can be used as a heat insulation and sound absorption material and a buoyancy material of a life jacket. Kapok fiber is frequently used as an oil absorbing material in recent years because the wax attached to the surface of the kapok fiber has excellent super-hydrophobic property. However, both ends of the original kapok fiber tube were closed. If the original kapok fiber is directly used as the adsorbing material, the absorption utilization rate is low and the original kapok fiber cannot be reused. Are also currently under N2The technology for carbonizing original kapok fiber at the high temperature of 1000 ℃ under protection to enable the kapok fiber to become a super-hydrophobic material, although the material has the performances of reusability, fire resistance, super-hydrophobicity and the like, the material has weak adsorption capacity on organic solvents under the condition of the same volume, the preparation process has complex process requirements and high production costAnd the like. At the same time, it is also because of its superhydrophobic properties, resulting in the inability to absorb pigments dissolved in water.
Disclosure of Invention
The invention aims to solve the technical problem of overcoming the defects in the prior art and provides a preparation method and application of a kapok fiber-based elastic foam material.
In order to solve the technical problem, the solution of the invention is as follows:
provides a preparation method of kapok fiber-based elastic foam material, which comprises the following steps:
(1) weighing a proper amount of kapok fiber, and placing the kapok fiber in a reaction kettle with a polytetrafluoroethylene lining; adding a glutaraldehyde solution with the mass concentration of 2.5-5% into the reaction kettle, completely immersing the kapok fiber, and continuously immersing for a period of time;
(2) heating the reaction kettle to perform hydrothermal carbonization reaction, controlling the reaction temperature to be 180-220 ℃ and the reaction time to be 12-24 hours; naturally cooling after the reaction is finished to obtain a blocky brown elastic material;
(3) soaking and rinsing the elastic material by using deionized water and then absolute ethyl alcohol until the final soaking solution is colorless and transparent; and naturally airing the elastic material to obtain the kapok fiber-based elastic foam material.
In the present invention, the duration of the soaking is 12 hours.
In the invention, the step of soaking and rinsing the elastic material by using deionized water and then absolute ethyl alcohol refers to the following steps: the elastic material is soaked and rinsed by deionized water, and then soaked and rinsed by absolute ethyl alcohol.
The invention also provides application of the kapok fiber-based elastic foam material as an adsorption material.
Description of the inventive principles:
the invention uses hollow and super-long kapok fiber as carbon source, and the natural material has excellent super-hydrophobic ability because a layer of wax is attached to the surface. Glutaraldehyde is used as a structural reinforcing agent, so that the hollow structure of the kapok fiber can be protected from collapse and damage. The kapok fiber pipe wall mainly comprises a polysaccharide network structure connected by glycosidic bonds, and can be converted into a carbon-rich material with better stability and strength through a mild hydrothermal carbonization process. After the hydrothermal carbonization, the integrated profile fiber-based elastic foam can be obtained, and the groups on the surface of the kapok fiber are changed, so that the obtained kapok fiber-based elastic foam has amphipathy, elasticity and repeatable adsorption performance, and can be used for adsorption of dyes in various oils, organic solvents and aqueous solutions.
Compared with the prior art, the invention has the beneficial effects that:
1. the elastic foam with the open-ended macroporous pipeline is prepared from the kapok fiber by a one-step method, so that the defect of preparing the carbon-based material by the traditional method can be overcome.
2. The method has the characteristics of rich raw material sources, low price, simple preparation process, low production cost and the like compared with the existing kapok fiber treatment technology (high-temperature carbonization).
3. Compared with a hydrophobic product obtained by the existing kapok fiber treatment technology, the amphiphilic elastic foam has good hydrophilic performance on the basis of keeping the original lipophilic performance, has a remarkable adsorption effect on various oils, organic solvents and dyes in aqueous solution, and has a macroscopic integral structure and high repeatable utilization rate, so that the kapok fiber elastic foam has good application in offshore waste oil and sewage treatment.
4. The shape of the kapok foam can be adjusted, and the amount of the added kapok fiber and the shape of the polytetrafluoroethylene reaction kettle lining can directly determine the size and the shape of the elastic foam.
Drawings
FIG. 1 is a Scanning Electron Micrograph (SEM) of kapok fiber-based resilient foam of example 5 of the present invention.
Wherein, the upper left is a scanning electron microscope image of the reacted kapok fiber under 500 multiplying power, the lower left is a scanning electron microscope image of the reacted kapok fiber under 3000 multiplying power, the upper right is a scanning electron microscope image of the reacted kapok fiber under 13000 multiplying power, and the lower right is a scanning electron microscope image of the reacted kapok fiber under 80000 multiplying power.
FIG. 2 is an XRD spectrum of a kapok fiber-based resilient foam of example 5 of the present invention; wherein the upper figure is the XRD spectrogram of the kapok fiber before reaction, and the lower figure is the XRD spectrogram of the kapok fiber after reaction.
FIG. 3 is a graph showing the adsorption rates of various organic solvents by kapok fiber-based elastic foams in example 9 of the present invention.
Fig. 4 shows the oil absorption desorption rate of the kapok fiber-based elastic foam of example 9 of the present invention on edible oil.
FIG. 5 shows the UV absorption spectra of rhodamine B before and after pigment adsorption by kapok fiber-based elastic foam in example 10 of the present invention.
FIG. 6 is a UV absorption spectrum of kapok fiber-based elastic foam according to example 10 of the present invention after absorbing pigments with methylene blue.
FIG. 7 shows UV absorption spectra of fluorescein before and after adsorption of pigment by kapok fiber-based elastic foam in example 10 of the present invention.
Detailed Description
The present invention will be further described with reference to the following examples.
Example 1
0.8g of kapok fiber is weighed into a 25ml reaction kettle with a polytetrafluoroethylene lining, and is soaked for 12 hours by adding glutaraldehyde solution with the concentration of 2.5%. And then reacting for 24 hours at the constant temperature of 180 ℃, soaking and rinsing the reaction product by using deionized water and absolute ethyl alcohol, and naturally airing to obtain cylindrical elastic foam with the diameter of 2cm and the height of 2.5 cm.
Example 2
The present embodiment is different from embodiment 1 in that: the reaction temperature in step (a) was 220 ℃. The rest is the same as in example 1.
Example 3
The present embodiment is different from embodiment 1 in that: the glutaraldehyde concentration in step (a) is 4%. The rest is the same as in example 1.
Example 4
The present embodiment is different from embodiment 1 in that: the reaction temperature in the step was 200 ℃ and the glutaraldehyde concentration was 5%, and the rest was the same as in example 1.
Example 5
The present embodiment is different from embodiment 1 in that: the reaction time in step (a) was 12 hours, and the rest was the same as in example 1.
Example 6
The present embodiment is different from embodiment 1 in that: the reaction time in step (a) was 18 hours, and the rest was the same as in example 1.
Example 7
0.8g of kapok fiber is weighed into a reaction kettle with a 20ml polytetrafluoroethylene lining, and is soaked for 12 hours by adding glutaraldehyde solution with the concentration of 5%. And then reacting for 24 hours at the constant temperature of 200 ℃, soaking and rinsing the reaction product by using deionized water and absolute ethyl alcohol, and naturally airing to obtain cylindrical elastic foam with the diameter of 1.4cm and the height of 4.0 cm.
Example 8
Weighing 10g of kapok fiber, placing the kapok fiber in a 200ml reaction kettle with a polytetrafluoroethylene lining, adding a glutaraldehyde solution with the concentration of 5%, and soaking for 12 hours. And then reacting for 24 hours at the constant temperature of 200 ℃, soaking and rinsing the reaction product by using deionized water and absolute ethyl alcohol, and naturally airing to obtain cylindrical elastic foam with the diameter of 4.0cm and the height of 6.5 cm.
(application) example 9
The kapok fiber-based elastic foam of example 3 was taken, and its volume was measured and recorded as Vf. Immersing the material in a certain solution for 15 minutes to reach adsorption balance, taking out the material, suspending and standing for 10 seconds to remove the redundant solution adhered to the surface of the material, and recording the volume V of the adsorption solutiona. Centrifuging the saturated kapok foam in a centrifuge tube at 1000r/s for 10 min, collecting the centrifuged solution, and recording the volume as Vr. Adsorption rate C of kapok foamv＝Va/VfDesorption rate R ═ Vr/V a100%. The above solution can be edible oil and various organic solvents.
According to the summary of the inventor's multiple test data, the kapok fiber-based elastic foamHas good adsorption performance on edible oil and various organic solvents. Taking n-hexane and carbon tetrachloride as examples, the adsorption capacity of the kapok fiber-based elastic foam to the n-hexane and the carbon tetrachloride can respectively reach 0.457ml/cm-3、0.455ml/cm-3. By the prior art treatment (N)2High temperature carbonization at 1000 ℃ under protection) to obtain carbonized ceiba fiber with n-hexane and carbon tetrachloride adsorption amount of 0.256ml/cm-3And 0.183ml/cm-3. It can be seen that the kapok fiber-based resilient foam obtained in the present invention has better adsorption performance for organic solvents than the same volume of prior art treated materials.
(application) example 10
Kapok fiber-based elastic foam adsorption dye experiments.
10mg/L of rhodamine B, methylene blue and fluorescein dye solutions are prepared respectively, the elastic foam in the example 6 is taken and placed in the dye, and the dye solution is obviously observed to be clear and transparent after standing for a period of time.
Setting a comparative experiment: adding the original kapok fiber with the same mass as the elastic foam into the three dye solutions, standing for 24h, taking out the kapok fiber, and finding that the color of the dye solution is the same as that of the initial solution. The comparative experiment shows that compared with untreated original kapok fiber, the kapok fiber-based elastic foam obtained by the invention has good adsorption effect on dye.
(application) example 11
Kapok fiber-based elastic foam water-oil selective adsorption experiment.
10ml of deionized water and 2ml of dyed edible oil are added into a No. 1 centrifugal tube with scales, and 10ml of deionized water and 10ml of dyed edible oil are added into a No. 2 centrifugal tube. Placing two lumps of kapok fiber-based elastic foam into two centrifuge tubes respectively, standing for a period of time, and observing the interface conditions of the two centrifuge tubes respectively, so that the edible oil in the No. 1 centrifuge tube can be observed to be completely adsorbed and the liquid level of deionized water is obviously reduced; the edible oil level in No. 2 centrifuge tube is lowered while the deionized water level is kept unchanged.
The reason for this is the amphiphilic nature of kapok fiber-based resilient foams, which provides water and oil selective adsorption to kapok fiber-based resilient foams. Namely, only absorbs oil but not water under the condition of sufficient oil, and absorbs water and oil under the condition of insufficient oil. Under the condition that the edible oil in the No. 1 centrifugal tube is insufficient, the kapok fiber-based elastic foam does not reach a saturated state after adsorbing the edible oil, so that deionized water can be absorbed again. In centrifuge tube No. 2, kapok fiber-based elastic foam was saturated after adsorbing sufficient amount of edible oil, so no more deionized water could be aspirated.
The above experiment was repeated with the original kapok fiber, and it was found that the original kapok fiber only absorbed oil and did not absorb water. The fact that the kapok fiber-based elastic foam subjected to hydrothermal carbonization in the invention is amphiphilic and has water-oil selective adsorption property, namely, the kapok fiber-based elastic foam only absorbs oil but not water under the condition of sufficient oil and absorbs water and oil under the condition of insufficient oil is fully proved.
Although the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention. However, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention are still within the technical scope of the present invention, unless the contents of the technical solution of the present invention are departed.
Claims (2)
1. The preparation method of the kapok fiber-based elastic foam material is characterized by comprising the following steps of:
(1) weighing a proper amount of kapok fiber, and placing the kapok fiber in a reaction kettle with a polytetrafluoroethylene lining; adding a glutaraldehyde solution with the mass concentration of 2.5-5% into the reaction kettle, completely immersing the kapok fiber, and continuously immersing for 12 hours;
(2) heating the reaction kettle to perform hydrothermal carbonization reaction, controlling the reaction temperature to be 180-220 ℃ and the reaction time to be 12-24 hours; naturally cooling after the reaction is finished to obtain a blocky brown elastic material;
(3) soaking and rinsing the elastic material by using deionized water, and then soaking and rinsing the elastic material by using absolute ethyl alcohol until a leaching solution is colorless and transparent finally; and naturally airing the elastic material to obtain the kapok fiber-based elastic foam material.
2. Use of the kapok fiber-based resilient foam material of claim 1 as an adsorbent material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710402218.3A CN106994332B (en) | 2017-06-01 | 2017-06-01 | Preparation and application of kapok fiber-based elastic foam material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710402218.3A CN106994332B (en) | 2017-06-01 | 2017-06-01 | Preparation and application of kapok fiber-based elastic foam material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106994332A CN106994332A (en) | 2017-08-01 |
| CN106994332B true CN106994332B (en) | 2020-04-03 |
Family
ID=59436485
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710402218.3A Active CN106994332B (en) | 2017-06-01 | 2017-06-01 | Preparation and application of kapok fiber-based elastic foam material |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106994332B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112023526B (en) * | 2020-09-07 | 2022-04-01 | 南开大学 | Preparation method of natural sponge filter element and application of natural sponge filter element in water treatment |
| CN115386136B (en) * | 2022-08-30 | 2023-07-28 | 南京大学 | Preparation method and application of aminated polyacrylamide foam adsorbent |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102888027A (en) * | 2012-09-26 | 2013-01-23 | 华南理工大学 | Bacterial cellulose/collagen-chitosan composite material and preparation method thereof |
| CN103059334A (en) * | 2013-01-05 | 2013-04-24 | 苏州大学 | Enhanced hydroxypropyl cellulose microporous film and preparation method thereof |
| CN103254539A (en) * | 2013-04-23 | 2013-08-21 | 天津工业大学 | High-strength high-tenacity protein molecule imprinting hybrid gel film and preparation method thereof |
| CN105776182A (en) * | 2016-04-29 | 2016-07-20 | 陕西科技大学 | Preparation method and application of hollow tubular biochar |
-
2017
- 2017-06-01 CN CN201710402218.3A patent/CN106994332B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102888027A (en) * | 2012-09-26 | 2013-01-23 | 华南理工大学 | Bacterial cellulose/collagen-chitosan composite material and preparation method thereof |
| CN103059334A (en) * | 2013-01-05 | 2013-04-24 | 苏州大学 | Enhanced hydroxypropyl cellulose microporous film and preparation method thereof |
| CN103254539A (en) * | 2013-04-23 | 2013-08-21 | 天津工业大学 | High-strength high-tenacity protein molecule imprinting hybrid gel film and preparation method thereof |
| CN105776182A (en) * | 2016-04-29 | 2016-07-20 | 陕西科技大学 | Preparation method and application of hollow tubular biochar |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106994332A (en) | 2017-08-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Li et al. | Bio-based multifunctional carbon aerogels from sugarcane residue for organic solvents adsorption and solar-thermal-driven oil removal | |
| Yang et al. | High capacity oil absorbent wood prepared through eco-friendly deep eutectic solvent delignification | |
| Wang et al. | An ultralight, elastic, cost-effective, and highly recyclable superabsorbent from microfibrillated cellulose fibers for oil spillage cleanup | |
| Rong et al. | A facile strategy toward 3D hydrophobic composite resin network decorated with biological ellipsoidal structure rapeseed flower carbon for enhanced oils and organic solvents selective absorption | |
| Wu et al. | Photothermal and Joule heating-assisted thermal management sponge for efficient cleanup of highly viscous crude oil | |
| CN109970058B (en) | Preparation method of coffee grounds matrix activated carbon | |
| Chen et al. | Liquid transport and real-time dye purification via lotus petiole-inspired long-range-ordered anisotropic cellulose nanofibril aerogels | |
| Li et al. | Carbon aerogel from winter melon for highly efficient and recyclable oils and organic solvents absorption | |
| WO2018014659A1 (en) | Carbon-based porous material, preparation method therefor and use thereof | |
| CN107722343B (en) | Preparation method of super-hydrophobic melamine sponge modified by dopamine and carbon nano tubes | |
| Song et al. | Large-scale blow spinning of carbon microfiber sponge as efficient and recyclable oil sorbent | |
| CN106994332B (en) | Preparation and application of kapok fiber-based elastic foam material | |
| WO2018076462A1 (en) | Preparation method for reduced graphene oxide/aspergillus niger cellulose aerogel | |
| Gao et al. | Superhydrophobic elastomer with leaf-spring microstructure made from natural wood without any modification chemicals | |
| CN108031447B (en) | Cellulose/silicon oxide composite aerogel elastomer, preparation method and application thereof in oil-water separation field | |
| CN107020071B (en) | Super-hydrophobic compound carbon aerogels oil absorption material of one kind and preparation method thereof | |
| CN110756179A (en) | Preparation method of super-hydrophobic super-oleophylic modified sponge material | |
| CN109437147B (en) | Preparation method of multifunctional carbon foam | |
| Song et al. | Constructing hydrothermal carbonization coatings on carbon fibers with controllable thickness for achieving tunable sorption of dyes and oils via a simple heat-treated route | |
| CN104001480A (en) | Preparation method for spherical water treatment agent | |
| CN107262060A (en) | A kind of heavy metal ion adsorbing material and preparation method thereof | |
| Zhou et al. | Preparation of carbonized kapok fiber/reduced graphene oxide aerogel for oil‐water separation | |
| CN108341931A (en) | A kind of hydrophobic porous aromatic skeleton material and its preparation method and application | |
| Mo et al. | Repeatable oil-water separation with a highly-elastic and tough amino-terminated polydimethylsiloxane-based sponge synthesized using a self-foaming method | |
| CN113880083B (en) | Method for preparing biomass activated carbon by using loofah sponge |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |