CN115806694B - Preparation method and application of high-elasticity bacterial cellulose aerogel - Google Patents
Preparation method and application of high-elasticity bacterial cellulose aerogel Download PDFInfo
- Publication number
- CN115806694B CN115806694B CN202211415336.5A CN202211415336A CN115806694B CN 115806694 B CN115806694 B CN 115806694B CN 202211415336 A CN202211415336 A CN 202211415336A CN 115806694 B CN115806694 B CN 115806694B
- Authority
- CN
- China
- Prior art keywords
- bacterial cellulose
- aerogel
- cellulose aerogel
- elasticity
- highly elastic
- 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
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/20—Controlling water pollution; Waste water treatment
- Y02A20/204—Keeping clear the surface of open water from oil spills
Abstract
The invention relates to a preparation method and application of high-elasticity bacterial cellulose aerogel, and belongs to the technical field of high polymer materials. The preparation method of the high-elasticity bacterial cellulose aerogel comprises the following steps: (1) Adding 1,2,3, 4-butane tetracarboxylic acid and sodium hypophosphite into the bacterial cellulose dispersion liquid, then adding acetic acid, uniformly stirring, and freeze-drying to obtain bacterial cellulose aerogel; (2) Performing heat treatment on the bacterial cellulose aerogel obtained in the step (1) to obtain esterified and crosslinked bacterial cellulose aerogel; (3) And (3) under the sealing condition, performing thermal chemical vapor deposition treatment on the aerogel obtained in the step (2) by using methyltrimethoxysilane, and finally obtaining the high-elasticity bacterial cellulose aerogel. The beneficial effects are that: the prepared aerogel is applied to the field of oil-water separation, has higher adsorption rate on oil, can be regenerated in a mechanical extrusion mode, and realizes the recovery of oil and the reuse of aerogel.
Description
Technical Field
The invention belongs to the technical field of high polymer materials, and particularly relates to a preparation method and application of high-elasticity bacterial cellulose aerogel.
Background
The oily sewage has wide sources, including petroleum leakage (petroleum exploitation, transportation, etc.), industry (textile, petrochemical, etc.), domestic sewage (catering industry), etc. Oil pollution is increasingly damaging to the environment, especially water, and oil-water separation techniques based on high-performance absorbing materials have attracted considerable attention. Aerogels prepared from natural cellulose have the characteristics of low density, high specific surface area and high porosity, and have extremely strong selective adsorptivity to oils after being hydrophobically modified. However, the mechanical properties of cellulose aerogels are generally poor, desorption of oils and recycling of the aerogel itself are difficult to achieve, severely limiting their application.
Solvent extraction, centrifugation and distillation are common methods for realizing the cyclic adsorption-desorption of the aerogel on the oil, but the methods generally have high energy consumption and complex process. The mechanical compression mode is adopted to extrude the oil adsorbed by the aerogel, which is a very ideal recovery mode, but the mechanical property of the aerogel is required to be higher, in particular to the elasticity and fatigue resistance, so that the recycling of the adsorption material for recovering the oil is realized, and the desorption of the oil and the recycling of the aerogel can be realized through the mechanical compression extrusion mode.
Disclosure of Invention
The invention provides a preparation method of high-elasticity bacterial cellulose aerogel for solving the technical problems.
The technical scheme for solving the technical problems is as follows: the preparation method of the high-elasticity bacterial cellulose aerogel comprises the following steps:
(1) Adding 1,2,3, 4-butane tetracarboxylic acid and sodium hypophosphite into the bacterial cellulose dispersion liquid, then adding acetic acid accounting for 1% of the volume of the bacterial cellulose dispersion liquid, uniformly stirring, and finally obtaining bacterial cellulose aerogel through gel aging and freeze drying;
(2) Performing heat treatment on the bacterial cellulose aerogel obtained in the step (1) to obtain esterified and crosslinked bacterial cellulose aerogel;
(3) And (3) under the sealing condition, performing thermal chemical vapor deposition treatment on the esterified and crosslinked bacterial cellulose aerogel obtained in the step (2) by using methyltrimethoxysilane, and finally obtaining the high-elasticity bacterial cellulose aerogel.
The beneficial effects are that:
1. the preparation process is simple, and the aerogel prepared by the esterification reaction and silane deposition has high elasticity, hydrophobicity and fatigue resistance;
2. the 1,2,3, 4-butane tetracarboxylic acid of the step (1) catalyzes the thermal chemical vapor deposition process of the step 3, and the treatment time can be shortened to 30 minutes.
On the basis of the technical scheme, the invention can be improved as follows.
Preferably, the concentration of the bacterial cellulose dispersion in step (1) is 0.1wt% to 2wt%.
Preferably, the mass of the 1,2,3, 4-butane tetracarboxylic acid in the step (1) is 1wt% to 40wt% of the mass of the cellulose.
Preferably, the mass of the sodium hypophosphite in the step (1) is 1-40 wt% of the mass of the cellulose
Preferably, the heat treatment temperature in the step (2) is 140-200 ℃.
Preferably, the heat treatment time in the step (2) is 1-15min.
Preferably, the mass of methyltrimethoxysilane in the step (3) is 1 to 10 times that of cellulose.
Preferably, the chemical vapor deposition time in the step (3) is 20-720min.
Preferably, the temperature of the chemical vapor deposition in the step (3) is 50-100 ℃.
The invention also aims to provide an application of the high-elasticity bacterial cellulose aerogel in oil-water separation, wherein the high-elasticity bacterial cellulose aerogel is prepared by the preparation method of the high-elasticity bacterial cellulose aerogel.
The beneficial effects are that: the prepared aerogel is applied to the field of oil-water separation, has higher adsorption rate on oil, can be regenerated in a mechanical extrusion mode, and realizes the recovery of oil and the reuse of aerogel.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is an SEM image of a highly elastic cellulose aerogel obtained in example 1 of the present invention, with a scale of 500um in the a-chart and a scale of 1um in the b-chart;
FIG. 2 is a stress-strain plot of the high elasticity cellulose aerogel prepared in example 1 compressed 50 times at 80% strain;
FIG. 3 is a graph showing the adsorption magnification of the highly elastic hydrophobic cellulose aerogel of application example 1 to various oils;
fig. 4 is a graph showing the change in adsorption magnification after 50 cycles of adsorption-desorption of dichloroethane (a) and n-hexane (b) using a highly elastic hydrophobic cellulose aerogel according to application example 1.
Detailed Description
The principles and features of the present invention are described below with examples given for the purpose of illustration only and are not intended to limit the scope of the invention.
Example 1
A preparation method of high-elasticity hydrophobic bacterial cellulose aerogel comprises the following steps:
(1) Firstly preparing bacterial cellulose aqueous dispersion with the concentration of 0.5%, then adding 1,2,3, 4-butane tetracarboxylic acid (BTCA) and Sodium Hypophosphite (SHP) which are 10% of the mass of cellulose into the dispersion, then adding acetic acid which is 1% of the volume of the cellulose dispersion, uniformly stirring, and finally obtaining the bacterial cellulose aerogel through gel aging and freeze drying.
(2) And (3) performing heat treatment on the aerogel in the step (1) at 170 ℃ for 5min to obtain the esterified and crosslinked bacterial cellulose aerogel.
(3) And (3) carrying out thermal chemical vapor deposition treatment on the aerogel obtained in the step (2) by adopting methyltrimethoxysilane (MTMS) with the mass being 2 times that of the aerogel in a closed container, wherein the temperature is 70 ℃ and the time is 30min, and finally obtaining the high-elasticity bacterial cellulose aerogel.
Electron microscopy observation is carried out on the high-elasticity bacterial cellulose aerogel prepared in the embodiment 1, and as shown in fig. 1, the prepared aerogel has an obvious micro-nano hierarchical structure. The scale bar in fig. 1a is 500um, where the micron-sized macropores are due to the growth of large ice crystals. The scale bar in fig. 1b is 1um, in which the nano-scale pores are formed by stacking nano-cellulose fibers with each other.
The high elasticity bacterial cellulose aerogel prepared in this example 1 was subjected to a compressive stress-strain test, and the sample was a cylindrical aerogel. The aerogel was compressed 50 times at 80% compressive strain and the results are shown in figure 2. The sample has higher elasticity, and the elastic recovery is more than 80% after being compressed for 50 times. And the elasticity loss occurs within 1O cycles, the elasticity of the aerogel is quite stable after 1O cycles, which indicates that the unstable factors in the aerogel are completely eliminated after the former times of compression, and the aerogel has stronger fatigue resistance.
The elastic aerogel prepared by the method has better elasticity and fatigue resistance, and the good performance can be attributed to double-crosslinked network. Firstly, BTCA and cellulose esterification react to form a first cross-linked network; and secondly, under the catalysis of BTCA, MTMS is deposited inside the aerogel to form a second crosslinked network.
The time of thermal chemical vapor deposition adopted by the invention can be shortened to 30min, which is far lower than that of general reports, and is mainly attributed to the acidity of BTCA, and MTMS can be hydrolyzed and self-crosslinked into a network structure under the acidic condition.
Example 2
A preparation method of high-elasticity hydrophobic bacterial cellulose aerogel comprises the following steps:
(1) Firstly preparing bacterial cellulose aqueous dispersion with the concentration of 0.4%, then adding 1,2,3, 4-butane tetracarboxylic acid (BTCA) and Sodium Hypophosphite (SHP) which are 10% of the mass of cellulose into the aqueous dispersion, then adding acetic acid which is 1% of the volume of the cellulose dispersion, uniformly stirring, and finally obtaining the bacterial cellulose aerogel through gel aging and freeze drying.
(2) And (3) performing heat treatment on the aerogel in the step (1) for 3min at 180 ℃ to obtain the esterified and crosslinked bacterial cellulose aerogel.
(3) And (3) performing thermal chemical vapor deposition treatment on the aerogel obtained in the step (2) in a closed container by adopting methyltrimethoxysilane (MTMS) with the mass being 3 times that of the aerogel, wherein the temperature is 80 ℃ and the time is 60 minutes, and finally obtaining the high-elasticity bacterial cellulose aerogel.
Example 3
A preparation method of high-elasticity hydrophobic bacterial cellulose aerogel comprises the following steps:
(1) Firstly preparing bacterial cellulose aqueous dispersion with the concentration of 1%, then adding 1,2,3, 4-butane tetracarboxylic acid (BTCA) and Sodium Hypophosphite (SHP) which are 15% of the mass of cellulose into the dispersion, then adding acetic acid which is 1% of the volume of the cellulose dispersion, stirring uniformly, and finally obtaining the bacterial cellulose aerogel through gel aging and freeze drying.
(2) And (3) performing heat treatment on the aerogel in the step (1) for 4min at 170 ℃ to obtain the esterified and crosslinked bacterial cellulose aerogel.
(3) And (3) carrying out thermal chemical vapor deposition treatment on the aerogel obtained in the step (2) in a closed container by adopting methyltrimethoxysilane (MTMS) with the mass being 4 times that of the aerogel, wherein the temperature is 60 ℃ and the time is 50min, and finally obtaining the high-elasticity bacterial cellulose aerogel.
Comparative example 1
Preparation of BTCA crosslinked bacterial cellulose aerogel:
(1) Firstly preparing bacterial cellulose aqueous dispersion with the concentration of 0.5%, then adding 1,2,3, 4-butane tetracarboxylic acid (BTCA) and Sodium Hypophosphite (SHP) which are 10% of the mass of cellulose into the dispersion, then adding acetic acid which is 1% of the volume of the cellulose dispersion, uniformly stirring, and finally obtaining the bacterial cellulose aerogel through gel aging and freeze drying.
(2) And (3) performing heat treatment on the aerogel in the step (1) at 170 ℃ for 5min to obtain the BTCA esterified and crosslinked bacterial cellulose aerogel.
The method of preparing the cross-linked aerogel of this comparative example was different from example 1 in that the thermal chemical vapor deposition described in step 3 was not performed.
Comparative example 2
Preparation of hydrophobic bacterial cellulose aerogel:
(1) Firstly preparing bacterial cellulose aqueous dispersion with the concentration of 0.5%, then adding acetic acid which is 1% of the volume of the cellulose dispersion into the dispersion, uniformly stirring, and finally obtaining the bacterial cellulose air-doubt gel through gel aging and freeze drying.
(2) The aerogel of step 1 was heat treated at 170 ℃ for 5min.
(3) And (3) performing thermal chemical vapor deposition treatment on the aerogel obtained in the step (2) in a closed container by adopting methyltrimethoxysilane (MTMS) with the mass being 2 times that of the aerogel, wherein the temperature is 70 ℃ and the time is 30min, and finally obtaining the hydrophobic bacterial cellulose aerogel.
The method for preparing the cross-linked aerogel of this comparative example is different from example 1 in that BTCA and SHP are not added in step 1, i.e., esterification cross-linking is not performed.
Comparative example 3
Preparation of BTCA-containing hydrophobic bacterial cellulose aerogel:
(1) Firstly preparing bacterial cellulose aqueous dispersion with the concentration of 0.5%, then adding 1,2,3, 4-butane tetracarboxylic acid (BTCA) accounting for 10% of the mass of cellulose into the dispersion, then adding acetic acid accounting for 1% of the volume of the cellulose dispersion, uniformly stirring, and finally obtaining the bacterial cellulose aerogel containing BTCA through gel aging and freeze drying.
(2) The aerogel of step 1 was heat treated at 170 ℃ for 5min.
(3) And (3) performing thermal chemical vapor deposition treatment on the aerogel obtained in the step (2) in a closed container by adopting methyltrimethoxysilane (MTMS) with the mass being 2 times that of the aerogel, wherein the temperature is 70 ℃ and the time is 30min, and finally obtaining the hydrophobic bacterial cellulose aerogel containing BTCA.
The method for preparing the cross-linked aerogel of this comparative example is different from example 1 in that SHP is not added in step 1, i.e., esterification cross-linking is not performed, but BTCA is contained in the aerogel.
The aerogels prepared in example 1 and comparative examples 1 to 3 were tested for density, porosity, water contact angle, silicon content, and elastic recovery, and the test results are shown in table 1. The elastic recovery rate is calculated from the result of compression stress-strain test (the compression strain is 80%, and the compression cycle is three times) of the sample, and the specific calculation method is that the value of the elastic recovery rate is the ratio of the recovery height of the aerogel after the compression stress is completely released to the initial height before compression; the water contact angle is measured by a contact angle measuring instrument; the silicon content is obtained by XPS (X-ray photoelectron spectroscopy) test.
TABLE 1 Properties of the aerogels prepared in example 1 and comparative examples 1-3
As can be seen from Table 1, the porosity of example 1 was substantially the same as that of comparative examples 1-3, and the addition of BTCA and SHP resulted in a significant increase in aerogel density. Comparative example 1 the elastic recovery of the esterified crosslinked aerogel was 56% and the water contact angle was 0 °, whereas after further vapor deposition the elastic recovery increased to 91% and the water contact angle reached 142 °. The aerogels of example 1 and comparative example 3 each contain BTCA, and their water contact angle, elastic recovery, and relative content of elemental silicon after vapor deposition are much greater than other aerogels due to the catalysis of BTCA by thermal chemical vapor deposition. Comparative example 2 contained no BTCA and had an elastic recovery of only 21% after vapor deposition, since comparative example 2 had neither an esterified crosslinked network nor a silane crosslinked network.
The foregoing is only illustrative of the present invention and is not to be construed as limiting thereof, but rather as various modifications, equivalent arrangements, improvements, etc., within the spirit and principles of the present invention.
Claims (10)
1. The preparation method of the high-elasticity bacterial cellulose aerogel is characterized by comprising the following steps of:
(1) Adding 1,2,3, 4-butane tetracarboxylic acid and sodium hypophosphite into the bacterial cellulose dispersion liquid, then adding acetic acid accounting for 1% of the volume of the bacterial cellulose dispersion liquid, uniformly stirring, and finally obtaining bacterial cellulose aerogel through gel aging and freeze drying;
(2) Performing heat treatment on the bacterial cellulose aerogel obtained in the step (1) to obtain esterified and crosslinked bacterial cellulose aerogel;
(3) And (3) under the sealing condition, performing thermal chemical vapor deposition treatment on the esterified and crosslinked bacterial cellulose aerogel obtained in the step (2) by using methyltrimethoxysilane, and finally obtaining the high-elasticity bacterial cellulose aerogel.
2. The method for preparing a highly elastic bacterial cellulose aerogel according to claim 1, wherein the concentration of the bacterial cellulose dispersion in the step (1) is 0.1 to 2wt%.
3. The method for preparing a highly elastic bacterial cellulose aerogel according to claim 1, wherein the mass of 1,2,3, 4-butanetetracarboxylic acid in the step (1) is 1wt% to 40wt% of the mass of cellulose.
4. The method for preparing a highly elastic bacterial cellulose aerogel according to claim 1, wherein the mass of sodium hypophosphite in the step (1) is 1 to 40wt% of the mass of cellulose.
5. The method for preparing a highly elastic bacterial cellulose aerogel according to claim 1, wherein the heat treatment temperature in the step (2) is 140 to 200 ℃.
6. The method for preparing a highly elastic bacterial cellulose aerogel according to claim 1, wherein the heat treatment time in the step (2) is 1 to 15min.
7. The method for preparing a highly elastic bacterial cellulose aerogel according to claim 1, wherein the mass of methyltrimethoxysilane in the step (3) is 1 to 10 times the mass of cellulose.
8. The method for preparing a highly elastic bacterial cellulose aerogel according to claim 1, wherein the chemical vapor deposition time in the step (3) is 20 to 720min.
9. The method for preparing a highly elastic bacterial cellulose aerogel according to claim 1, wherein the chemical vapor deposition temperature in the step (3) is 50-100 ℃.
10. The use of a highly elastic bacterial cellulose aerogel in oil-water separation, characterized in that the highly elastic bacterial cellulose aerogel is produced by the method for producing a highly elastic bacterial cellulose aerogel according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211415336.5A CN115806694B (en) | 2022-11-11 | 2022-11-11 | Preparation method and application of high-elasticity bacterial cellulose aerogel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211415336.5A CN115806694B (en) | 2022-11-11 | 2022-11-11 | Preparation method and application of high-elasticity bacterial cellulose aerogel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115806694A CN115806694A (en) | 2023-03-17 |
| CN115806694B true CN115806694B (en) | 2023-08-22 |
Family
ID=85483404
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211415336.5A Active CN115806694B (en) | 2022-11-11 | 2022-11-11 | Preparation method and application of high-elasticity bacterial cellulose aerogel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115806694B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105924686A (en) * | 2016-04-13 | 2016-09-07 | 四川大学 | Biology base polymer aerogel oil absorption material and preparation method thereof |
| CN114405421A (en) * | 2022-03-15 | 2022-04-29 | 北京化工大学 | Cellulose nanofiber aerogel photothermal interface water evaporation material and preparation method thereof |
| CN114588846A (en) * | 2022-02-28 | 2022-06-07 | 武汉理工大学 | Nano cellulose/Ti3C2TXComposite aerogel and preparation method and application thereof |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10350576B2 (en) * | 2013-10-29 | 2019-07-16 | Wisconsin Alumni Research Foundation | Sustainable aerogels and uses thereof |
| US20170088947A1 (en) * | 2015-09-29 | 2017-03-30 | Silcotek Corp. | Chemical vapor deposition functionalization |
-
2022
- 2022-11-11 CN CN202211415336.5A patent/CN115806694B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105924686A (en) * | 2016-04-13 | 2016-09-07 | 四川大学 | Biology base polymer aerogel oil absorption material and preparation method thereof |
| CN114588846A (en) * | 2022-02-28 | 2022-06-07 | 武汉理工大学 | Nano cellulose/Ti3C2TXComposite aerogel and preparation method and application thereof |
| CN114405421A (en) * | 2022-03-15 | 2022-04-29 | 北京化工大学 | Cellulose nanofiber aerogel photothermal interface water evaporation material and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115806694A (en) | 2023-03-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Nguyen et al. | Green aerogels from rice straw for thermal, acoustic insulation and oil spill cleaning applications | |
| Yang et al. | High capacity oil absorbent wood prepared through eco-friendly deep eutectic solvent delignification | |
| Huang et al. | Surface modification of activated carbon fiber by low-temperature oxygen plasma: Textural property, surface chemistry, and the effect of water vapor adsorption | |
| Mohamed et al. | Physicochemical characterization of cellulose nanocrystal and nanoporous self-assembled CNC membrane derived from Ceiba pentandra | |
| Pereira et al. | Bacterial cellulose aerogels: Influence of oxidation and silanization on mechanical and absorption properties | |
| CN108031447B (en) | Cellulose/silicon oxide composite aerogel elastomer, preparation method and application thereof in oil-water separation field | |
| CN104071770B (en) | A kind of method utilizing waste and old cotton textiles to prepare porous Functional Carbon Fiber bunch | |
| CN105579403B (en) | Highly porous aerogels | |
| Lazzari et al. | A study on adsorption isotherm and kinetics of petroleum by cellulose cryogels | |
| Hu et al. | Preparation of high elastic bacterial cellulose aerogel through thermochemical vapor deposition catalyzed by solid acid for oil-water separation | |
| 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 | |
| Viscusi et al. | Transport properties of water vapor through hemp fibers modified with a sustainable process: Effect of surface morphology on the thermodynamic and kinetic phenomena | |
| Yang et al. | Hydrophobic modification of platanus fruit fibers as natural hollow fibrous sorbents for oil spill cleanup | |
| CN110575794A (en) | super-hydrophobic cotton cellulose aerogel and preparation method and application thereof | |
| WO2013059523A2 (en) | Carbonaceous material for purifying lignocellulosic oligomers | |
| Yan et al. | Recyclable bacterial cellulose aerogel for oil and water separation | |
| CN115806694B (en) | Preparation method and application of high-elasticity bacterial cellulose aerogel | |
| Zhai et al. | Superhydrophobic cellulose-based aerogel derived from Phormium tenax (harakeke) for efficient oil sorption | |
| Zhang et al. | Multicovalent crosslinked double-network graphene–polyorganosiloxane hybrid aerogels toward efficient thermal insulation and water purification | |
| Pawar et al. | Sustainable, hydrophobic, and reusable paper waste aerogel as an effective and versatile oil absorbent | |
| Peng et al. | Modified silica incorporating into PDMS polymeric membranes for bioethanol selection | |
| Wang et al. | Shape memory and underwater superelastic mof@ cellulose aerogels for rapid and large-capacity adsorption of metal ions | |
| Rabbi et al. | Evaluation of microporous acrylicbased activated carbon fibers as novel adsorbents for methylene blue removal | |
| CN109745954B (en) | Preparation method of kenaf adsorption material | |
| CN113754922B (en) | Hydrophobic sponge loaded with carbon nano tubes, preparation method thereof and application thereof in oil-water separation |
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 |