CN107159163A - A kind of preparation method of the cellulose base composite aerogel of high absorption property - Google Patents
A kind of preparation method of the cellulose base composite aerogel of high absorption property Download PDFInfo
- Publication number
- CN107159163A CN107159163A CN201710429529.9A CN201710429529A CN107159163A CN 107159163 A CN107159163 A CN 107159163A CN 201710429529 A CN201710429529 A CN 201710429529A CN 107159163 A CN107159163 A CN 107159163A
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- Prior art keywords
- dopamine
- cellulose
- composite aerogel
- poly
- base composite
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- 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
- B01J20/22—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising organic material
- B01J20/26—Synthetic macromolecular compounds
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- 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
- B01J20/22—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising organic material
- B01J20/24—Naturally occurring macromolecular compounds, e.g. humic acids or their derivatives
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- 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
- B01J20/28047—Gels
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/285—Treatment of water, waste water, or sewage by sorption using synthetic organic sorbents
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
- C02F2101/308—Dyes; Colorants; Fluorescent agents
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Analytical Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Dispersion Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Processes Of Treating Macromolecular Substances (AREA)
Abstract
The invention discloses a kind of preparation method of the cellulose base composite aerogel with high absorption property, dopamine powder is dissolved in 50% 80% lithium bromide water solution, microcrystalline cellulose powder is added, dopamine is 1 with microcrystalline cellulose weight ratio:0.75‑1:1.5, it is placed in 120 DEG C of oil baths, microcrystalline cellulose dissolves under 50 100r/min stirring conditions, dissolution time is 40min or so, meanwhile, dopamine auto polymerization forms poly-dopamine；Solution is placed in room temperature freeze-drying after slowly cooling and forms poly-dopamine/cellulose base composite aerogel.The composite aerogel of the present invention has excellent absorption property to positive dyestuff methylene blue, and its technique is relatively simple.
Description
Technical field
The present invention relates to field of environmental improvement, more specifically, it is related to a kind of preparation method of the adsorbent of high absorption property.
Background technology
In recent decades, the quickening of process of industrialization and the sharp increase of population cause serious environmental pollution.Its reclaimed water is dirty
Dye is particularly acute, substantial amounts of toxic heavy metal ion, inorganic anion, organic micro-pollutantses, such as dyestuff, phenols, agricultural chemicals, humic
Sour organic compound, detergent and other persistence organic pollutants, in wide coverage all over the world in recent decades.This
A little toxic pollutants are discharged into water body, greatly affected the ecological balance, harmful effect is caused to animals and plants.In addition these are dirty
Thing not only chemically-resistant and biodegradation is contaminated, and has very big environment mobility, is had simultaneously for the biological concentration in food chain
Very strong trend.Therefore, we are necessary to be handled these sewage before natural water is discharged into.
Existing a variety for the treatment of technologies can reduce the pollutant concentration in waste water at present, including chemistry redox, UF membrane,
Extraction, ion exchange and electrodialysis etc., the validity and cost of these methods are variant.Compare at several different physical chemistry
The method for managing sewage, in numerous treatment technologies, charcoal absorption is because its removal efficiency is high, produced without harmful side product, quilt
It is considered as one of optimal alternative solution of removal water pollutant.But the production of activated carbon is relative complex, be directed to carbonization and
Activation stage, although its water treatment efficiency is favourable, the production cost of great number cause activated carbon can not as adsorbent poor or
Developing country is used for large-scale water process, therefore, and inexpensive, efficient adsorbent turns into the emphasis that people study.
The content of the invention
, should it is an object of the invention to provide a kind of preparation method of the cellulose base composite aerogel with high absorption property
Composite aerogel prepared by method has excellent absorption property to positive dyestuff methylene blue, and its technique is relatively simple.
A kind of preparation method of the cellulose base composite aerogel of high absorption property of the present invention, has main steps that：
A. the lithium bromide water solution by weight for 60% is prepared；
B. dopamine powder is added in lithium bromide water solution, is dissolved under conditions of stirring, add microcrystalline cellulose
Powder, wherein, dopamine is 1 with microcrystalline cellulose weight ratio:0.75-1:1.5；
C. it is placed in 120 DEG C of oil baths, microcrystalline cellulose dissolves under 50-100r/min stirring conditions, and dissolution time is 40min
Left and right, meanwhile, dopamine auto polymerization forms poly-dopamine；
D. until cellulose is completely dissolved, solution is placed in room temperature and is cooled slowly until to form poly-dopamine/cellulose
Gel；
E. deionized water is added into poly-dopamine/cellulose gel, constantly replaces deionized water, until removing bromine completely
Change lithium, poly-dopamine/cellulose base composite aerogel is produced by freeze-drying.
In a kind of preparation method of the cellulose base composite aerogel of high absorption property of the present invention, described microcrystalline cellulose
Element is in granular form, and its particle diameter is about 25 μm.
In a kind of preparation method of the cellulose base composite aerogel of high absorption property of the present invention, described lithium bromide water
Solution is 60%.
Compared with prior art, the beneficial effects of the invention are as follows：
1) present invention is used makes aeroge by cellulose, significantly increases the porosity and ratio of cellulose aerogels
Surface area, and preparation method is simple, while polymerizeing dopamine in aeroge situ so that poly-dopamine is uniformly dispersed in
Inside cellulose aerogels, adsorption capacity of the cellulose aerogels to methylene blue is greatly improved.With pure cellulose airsetting
Glue is compared, and poly-dopamine/cellulose base composite aerogel improves 47.29% to the adsorption efficiency of methylene blue.
2) present invention is used as matrix using microcrystalline cellulose.Cellulose is natural polymer most ancient on the earth and most rich
Rich renewable resource, it is mainly derived from trees, bamboo, cotton, reed and other higher plants.Produced about on the annual earth
200000000000 tons of plant celluloses, are inexhaustible, the nexhaustible renewable resources of nature.Therefore, for native cellulose
The high value added utilization of this non-fossil renewable natural resources, and high performance-price ratio " green " sorbing material industry and technology
Demand, cellulose base sorbing material of the research and development with independent intellectual property right, for extension China fiber-composite industrial chain,
Strategic high-tech demand and international competitiveness are met, it is significant.
3) present invention poly-dopamine used is modified to cellulose aerogels.The molecular structure of poly-dopamine is similar to and made a gift of
The structure of shellfish attachment proteins, has the advantages that the latter's adhesiveness, can easily stick to almost all kinds of surface, bag
Include from organic to inorganic, or even super hydrophobic surface.In addition, the auto polymerization conditioned response of dopamine is gentle, it is not necessary to by
The reaction condition of any complicated instrument or harshness, poly-dopamine is introduced into cellulose aerogels by the present invention is used for dyestuff suction
It is attached, play the absorption property of poly-dopamine.
Further, poly-dopamine of the invention is a kind of extremely strong polymer of adhesiveness, is introduced into cellulose aerogels
Inside greatly improves adsorption capacity of the composite aerogel to methylene blue.
Further, the concrete operations in a certain amount of dopamine powder addition LiBr aqueous solution are by the present invention：Temperature
For 20-25 DEG C, mixing time is 10min or so, and with 50-100r/min stirring.So ensure that dopamine is completely dissolved.
Further, the present invention by cellulose powder add LiBr the aqueous solution in concrete operations be：Temperature is 120
DEG C, dissolution time is 40min, and with 50-100r/min stirring.So ensure that cellulose is completely dissolved.
Embodiment
The present invention is described in further details with reference to embodiment.
Embodiment 1
60wt% lithium bromide water solution (LiBr) 5ml is prepared, 50mg dopamine powder is added into the water-soluble of lithium bromide
In liquid,：Temperature is 20-25 DEG C, and mixing time is 10min or so, and with 50-100r/min stirring.So ensure DOPA
Amine is completely dissolved.Then 75mg microcrystalline cellulose powder is added, is placed in 120 DEG C of oil baths and dissolves under agitation, dissolving
Time is 40min, and with 50-100r/min stirring.Auto polymerization forms poly-dopamine to dopamine at high temperature simultaneously；Until
Cellulose is completely dissolved, and poly-dopamine/cellulose solution is placed in room temperature and is cooled slowly until to form gel, then to poly- many
Deionized water is added in bar amine/cellulose gel, constantly deionized water is exchanged until removing lithium bromide, the poly- DOPA of gained completely
Amine/cellulose aquagel produces poly-dopamine/cellulose base composite aerogel by freeze-drying.
Microcrystalline cellulose wherein used in the present invention is in granular form, and its particle diameter is about 25 μm.
Embodiment 2
60wt% lithium bromide water solution (LiBr) 5ml is prepared, 75mg dopamine powder is added into the water-soluble of lithium bromide
In liquid, by DOPA amine solvent under conditions of stirring, 75mg microcrystalline cellulose powder is then added, is placed under agitation
Dissolved in 120 DEG C of oil baths, while auto polymerization forms poly-dopamine to dopamine at high temperature；Until cellulose is completely dissolved, will be poly-
Dopamine/cellulose solution, which is placed in room temperature, to be cooled slowly until to form gel, is then added into poly-dopamine/cellulose gel
Enter deionized water, constantly exchange deionized water until removing LiBr completely, gained poly-dopamine/cellulose aquagel passes through freezing
It is drying to obtain poly-dopamine/cellulose base composite aerogel.
Embodiment 3
60wt% lithium bromide water solution (LiBr) 5ml is prepared, 100mg dopamine powder is added to the LiBr aqueous solution
In, by DOPA amine solvent under conditions of stirring, 75mg microcrystalline cellulose powder is then added, is placed under agitation
Dissolved in 120 DEG C of oil baths, while auto polymerization forms poly-dopamine to dopamine at high temperature；Until cellulose is completely dissolved, will be poly-
Dopamine/cellulose solution, which is placed in room temperature, to be cooled slowly until to form gel, is then added into poly-dopamine/cellulose gel
Enter deionized water, constantly exchange deionized water until removing LiBr completely, gained poly-dopamine/cellulose aquagel passes through freezing
It is drying to obtain poly-dopamine/cellulose base composite aerogel.
Claims (3)
1. a kind of preparation method of the cellulose base composite aerogel of high absorption property, has main steps that：
A. the lithium bromide water solution by weight for 50%-80% is prepared；
B. dopamine powder is added in lithium bromide water solution, is dissolved under conditions of stirring, add microcrystalline cellulose powder,
Wherein, dopamine and microcrystalline cellulose weight ratio are 1:0.75-1:1.5；
C. it is placed in 120 DEG C of oil baths, microcrystalline cellulose dissolves under 50-100r/min stirring conditions, dissolution time is 40min left
The right side, meanwhile, dopamine auto polymerization forms poly-dopamine；
D. until cellulose is completely dissolved, solution is placed in room temperature and is cooled slowly until to form poly-dopamine/cellulose gel；
E. deionized water is added into poly-dopamine/cellulose gel, constantly replaces deionized water, until removing bromination completely
Lithium, poly-dopamine/cellulose base composite aerogel is produced by freeze-drying.
2. a kind of preparation method of the cellulose base composite aerogel of high absorption property according to claim 1, its feature
It is, described microcrystalline cellulose is in granular form, its particle diameter is about 25 μm.
3. a kind of preparation method of the cellulose base composite aerogel of high absorption property according to claim 1, its feature
It is, wherein, lithium bromide water solution is 60%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201710429529.9A CN107159163A (en) | 2017-06-08 | 2017-06-08 | A kind of preparation method of the cellulose base composite aerogel of high absorption property |
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| CN201710429529.9A CN107159163A (en) | 2017-06-08 | 2017-06-08 | A kind of preparation method of the cellulose base composite aerogel of high absorption property |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108752606A (en) * | 2018-06-26 | 2018-11-06 | 西南交通大学 | Cellulose composite hydrogel for Dye Adsorption and preparation method thereof and aeroge and preparation method thereof |
| CN108774343A (en) * | 2018-06-26 | 2018-11-09 | 西南交通大学 | Composite aerogel and preparation method thereof and composite hydrogel and preparation method thereof |
| CN108839408A (en) * | 2018-05-18 | 2018-11-20 | 浙江鹏远新材料股份有限公司 | A kind of corrosion resistant heat-insulating heat-preserving material and preparation method thereof |
| CN109174020A (en) * | 2018-08-07 | 2019-01-11 | 济南大学 | A kind of preparation method of poly-dopamine modified lithium cellulose aerogels coating solid phase micro-extraction fiber |
| CN109225160A (en) * | 2018-10-29 | 2019-01-18 | 西南交通大学 | A kind of cellulose base porous aerogel and preparation method thereof with Photocatalytic activity |
| CN111849019A (en) * | 2020-07-31 | 2020-10-30 | 河海大学 | Preparation method of cellulose composite aerogel |
| CN112831085A (en) * | 2020-12-30 | 2021-05-25 | 浙江海洋大学 | Preparation of oil-water separation cellulose aerogel |
| CN118440391A (en) * | 2024-04-25 | 2024-08-06 | 南京林业大学 | Polydopamine-nanocellulose composite aerogel material, and preparation method and application thereof |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108839408A (en) * | 2018-05-18 | 2018-11-20 | 浙江鹏远新材料股份有限公司 | A kind of corrosion resistant heat-insulating heat-preserving material and preparation method thereof |
| CN108752606A (en) * | 2018-06-26 | 2018-11-06 | 西南交通大学 | Cellulose composite hydrogel for Dye Adsorption and preparation method thereof and aeroge and preparation method thereof |
| CN108774343A (en) * | 2018-06-26 | 2018-11-09 | 西南交通大学 | Composite aerogel and preparation method thereof and composite hydrogel and preparation method thereof |
| CN109174020A (en) * | 2018-08-07 | 2019-01-11 | 济南大学 | A kind of preparation method of poly-dopamine modified lithium cellulose aerogels coating solid phase micro-extraction fiber |
| CN109174020B (en) * | 2018-08-07 | 2021-07-27 | 济南大学 | Preparation method of polydopamine modified cellulose aerogel coating solid-phase microextraction fiber |
| CN109225160A (en) * | 2018-10-29 | 2019-01-18 | 西南交通大学 | A kind of cellulose base porous aerogel and preparation method thereof with Photocatalytic activity |
| CN111849019A (en) * | 2020-07-31 | 2020-10-30 | 河海大学 | Preparation method of cellulose composite aerogel |
| CN112831085A (en) * | 2020-12-30 | 2021-05-25 | 浙江海洋大学 | Preparation of oil-water separation cellulose aerogel |
| CN118440391A (en) * | 2024-04-25 | 2024-08-06 | 南京林业大学 | Polydopamine-nanocellulose composite aerogel material, and preparation method and application thereof |
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Application publication date: 20170915 |