CN107556760A - Graphene oxide silk salix monogolica nano composite material and preparation method thereof - Google Patents
Graphene oxide silk salix monogolica nano composite material and preparation method thereof Download PDFInfo
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Abstract
The invention discloses a kind of graphene oxide silk salix monogolica nano composite material and preparation method thereof, preparation process is as follows：Salix cellulose is modified using PAMAM；Salix monogolica silk magnetic porous composite material is obtained using liquid nitrogen, frozen dried；Salix monogolica silk magnetic porous composite material is immersed in graphene oxide water solution, cleaned repeatedly with ethanol and deionized water after taking-up, graphene oxide silk salix monogolica nano composite material is obtained after vacuum drying.The present invention uses salix monogolica and silk as base material, raw material is sufficient, it is cheap, then magnetic nano ferroferric oxide, graphene oxide are subjected to effective collaboration self assembly, graphene oxide silk salix monogolica nano composite material is obtained, there is huge application prospect in fields such as sorbing material, biomaterials.
Description
Technical field
The present invention relates to a kind of graphene oxide-silk-salix monogolica nano composite material, belongs to field of compound material.
Background technology
Silk is described as fiber queen, and its is soft, abundant, smooth, plentiful, possesses gloss soft as pearl,
Weaving, apparel industry are widely used.Silk is made up of silk gum and fibroin, and wherein silk gum is located at the outer layer of silk, content
Between 20%-30%, fibroin is located at the internal layer of silk, and content is between 70%-80%.Fibroin positioned at silk internal layer is one
Kind natural macromolecular material, by serine（serine）, glycine（Glycine）, alanine（alanine）Deng 18 kinds of amino
Acid composition, molecular weight is about 2300kDa, is made up of heavy chain, light chain and P25, and wherein the molecular weight of heavy chain H chains is 350kDa, gently
Chain L chain molecular weights are 26kDa, and P25 molecular weight is 30kDa, and the ratio of three is 6:6:1.Fibroin share 11 noncrystalline domains and
12 crystal regions, by disulfide bond between heavy chain H chains and light chain L chains, form H-L complexs.
The crystal habit of fibroin is broadly divided into two kinds of the type of fibroin I and II type of fibroin.The type of fibroin I is a kind of knot of meta-stable
Structure, conformation are crank shape or zigzag, are a kind of intermediatenesses between alpha-helix and beta sheet, and structure cell belongs to orthorhombic
System.Handled through damp and hot, sour, polar solvent etc., the type of fibroin I is easy to change to the type of fibroin II.The type of fibroin II is antiparallel β-folding
Stack structure, belong to orthorhombic system, peptide chain arranged regular, hydrogen bond and intermolecular gravitation make adjacent chain is intersegmental to be tightly combined, tension
It is strong to stretch ability, and is insoluble in water, it is strong to the resistance of acid, alkali, salt, enzyme and heat.In addition, recent years are found that one kind is new again
Fibroin crystal habit, i.e. the type of fibroin III, its crystal structure is similar with polyglycine II, belongs to hexagonal crystal system.
Silk obtained regenerated silk fibroin after degumming, dissolving, purification have nontoxic, non-stimulated, biological degradability,
Biocompatibility, good engineering properties, are easily processed into various forms, as silk protein films, gel, fiber, three-dimensional rack,
Sponge etc., it is a kind of important natural function material, available for fields such as biology, medical science, photoelectric materials, is carried as medicament slow release
Body, tissue engineering bracket, operation suture thread, artificial skin, artificial tendon, cell culture vector, wound dressing, electrically conducting transparent are thin
Film, sorbing material etc.（Silk, 2017,03:6-12；Biomedical engineering magazine, 2015,06:1364-1368；Sericulture section
Learn, 2016,02:341-345）.
For a long time, cellulose is always weaving, the key industry raw material of papermaking, with its recyclability, biodegradable
Property and cost advantage are increasingly subject to the attention of people, in medicine control, release tech, immobilization technology, biology sensor, membrane material
Material, performance chemicalses and additive etc. show good development prospect.Reduction and oil, natural gas due to arable land etc.
The increasingly depleted of fossil resource, the yield of synthetic fibers will be restricted more and more.And a kind of green of cellulose conduct,
Environmentally friendly, reproducible resource, obtain a unprecedented opportunity to develop.
Salix monogolica is the desert plant that a kind of only a few can be grown in salt-soda soil.Its sprout is yellow, in leaf is linear or line
Shape lanceolar, branch, which is grown thickly, is not afraid of husky pressure, and well developed root system, rudiment power is strong, is desert-control tree, be mainly distributed on the Inner Mongol,
The ground such as Hebei, Shanxi, Shaanxi, Gansu, Qinghai, Sichuan.Salix monogolica is one of the first choice of " three Norths shelter-forest ", is not only acted as windproof solid
Effect that is husky, conserving water and soil, improving the ecosystem, maintaining ecological balance etc. that also there is unique function.
Salix monogolica in addition to small part is used for pulping and paper-making, fiberboard and composite plate, burn or lose as yule logs by the overwhelming majority
Abandon, cause the huge wasting of resources.The main chemical compositions of salix monogolica mainly have cellulose, hemicellulose, lignin and ash content, fine
The content of element is tieed up in more than 60-70%, is natural reproducible biomass resource, rationally will produce huge warp using salix monogolica resource
Benefit of helping and ecological benefits.At present, most research all concentrates on the cellulose how extracted in salix monogolica.Beijing Forestry University
Department of chemistry engineering Jiang builds new et al. the influence that have studied steam blasting pretreatment to salix monogolica composition and fibre structure performance（Modernization
Work, 2008,28 (2)）.Agricultural University of the Inner Mongol's material science and School of Art and Design Zhang Bin et al. are using salix cellulose as original
Material, have studied the technique that supercritical ultrasonics technology prepares microfibril（Paper and papermaking, 2014,33 (3)）.Agricultural University of the Inner Mongol's material science
With refined et al. main chemical compositions cellulose, the hemicelluloses that salix monogolica material has been isolated using chemical reagent of School of Art and Design Li Ya
Element（Agricultural University of the Inner Mongol's journal, 2014,35 (1)）.Industry light industry textile industry institute of Qiqihar University is permitted phoenix et al. and utilizes peroxidating
Hydrogen method separates salix monogolica and the cellulose in caragana microphylla mixed material（Chemistry of forest product and industry, 2006,26 (2)）.Zhengzhou University's chemical industry
Salix cellulose is extracted with energy institute Huang star et al. use acid catalysis Ethanol Method（Jiangsu's agriculture science, 2014,42 (3)）.
And the document that salix monogolica based nano composite material is prepared using the salix cellulose of extraction as raw material is less.Such as the Inner Mongol
Agriculture university Li Ya is refined to report salix cellulose/composite titania material（Li Ya is refined, and salix celluloses/titanium dioxide is multiple
The preparation of condensation material and performance study [D] Agricultural University of the Inner Mongol, 2015）.Chinese patent CN201410701957.9 is disclosed
A kind of salix monogolica regenerated celulose fibre, Chinese patent CN201410544845.7 disclose a kind of nanometer silver antimicrobial salix monogolica again
Raw cellulose fibre, Chinese patent CN201410544055.9 disclose a kind of feature salix monogolica regenerated celulose fibre and its system
Preparation Method, a kind of graphene blending salix monogolica regenerated celulose fibres of Chinese patent CN201410544166.X and preparation method thereof.
2004, Univ Manchester UK physicist An Deliehaimu and Constantine's Nuo Woxiao loves, utilize
The method for tearing adhesive tape, successfully isolates the graphene of individual layer atomic arrangement from graphite, therefore two people also obtain 2010
The Nobel Prize in physics in year（Science,2004,306( 5696):666-669）.Graphene is by carbon atom with sp2Hydridization rail
Road forms hexangle type honeycomb lattice, and its construction unit is carbon hexatomic ring, and it is a kind of two-dimentional material of only single layer of carbon atom thickness
Material.Graphene is the basic system unit for forming carbon-based material.It can be wrapped to form zero dimension Fullerenes, be rolled into one-dimensional
Carbon nanotube, layer upon layer is into three-dimensional graphite.From graphene find that day, graphene just into
For the focus and focus of research, in ultracapacitor, transparency electrode, desalinization, light emitting diode, sensor, hydrogen storage, the sun
The fields such as energy battery, catalyst carrier, composite, biologic bracket material, bio-imaging, drug delivery, weaving, printing and dyeing have extensively
General application（Novel charcoal material, 2014,05:329-356, Chinese invention patent 201410565512.2）.
Graphene composite material is research direction important in graphene application field（Chemical Engineer, 2015,01:34-
38+46）.Existing graphene composite material is by graphene oxide and another material mostly（Inorganic material, polymeric material
Material etc.）Uniformly it is mixed in solvent, finished product is then obtained by the methods of spin processes, vacuum filtration, spin coating.But due to graphene
The problem of certain be present in the π-π stackings effect easily aggregation of itself, its dispersiveness in a solvent（Chemical progress, 2016,05:
647-656）, the preparation of follow-up composite and the final performance of product can be influenceed.
The content of the invention
In view of the above problems, the present invention provides a kind of graphene oxide-silk-salix monogolica nano composite material and preparation side
Method.
The technical scheme is that：
（1）Salix cellulose is immersed into the NaOH solution 60min that mass fraction is 15%, bath raio 1 under normal temperature:50, use deionized water
Neutrality is washed till, is dried；Salix cellulose after NaOH is handled is dispersed in water again, bath raio 1:50, glutaraldehyde is added, wherein
The volume ratio of glutaraldehyde and the salix monogolica aqueous solution is 1:10-1:25,1h is reacted, is slowly added to 1-100g/L polyamide-amide PAMAM
The volume ratio of the aqueous solution, wherein the PAMAM aqueous solution and the salix cellulose aqueous solution is 1:5-1:10, after reacting 24h, use distilled water
Washed repeatedly with ethanol, PAMAM modification salix celluloses are obtained after drying；（2）Silk-fibroin is dissolved in deionized water, is configured to
The 1g/L-100g/L aqueous solution, the 1g/L-100g/L trivalent iron salt aqueous solution is slowly dropped into silk under conditions of 50-80 DEG C
In protein solution, stir, wherein the mass ratio of the silk-fibroin and trivalent iron salt is 1:1-10:1, with 30 drops/min's
The calcium chloride solution that concentration is 1-5wt% is added dropwise in speed, and the mass ratio of calcium chloride and silk-fibroin is 1:10-1:50, adjust pH
Value is to 10-12, and after 60 DEG C are at the uniform velocity stirred 1h, the PAMAM being slowly added in step 1 is modified salix cellulose, modified salix monogolica fiber
The mass ratio of element and silk-fibroin is 1:10-10:1, after reacting 24h, pour into mould, be put into 1min in liquid nitrogen, be placed in after taking-up-
Pre-freeze 6h in 20 DEG C of refrigerators, 6h is freezed in -80 DEG C of Thermo ultra low temperature freezers, 48h in freeze dryer is then placed in and obtains magnetic
It is composite porous；（3）Configuration concentration 0.1-100g/L graphene oxide water solution, ultrasonic 1h, then by step 2
Magnetic porous composite material is immersed in 24h in graphene oxide water solution, bath raio 1:50, it is anti-with ethanol and deionized water after taking-up
Multiple cleaning, obtains graphene oxide-silk-salix monogolica nano composite material after vacuum drying.
Preferably, the silk-fibroin is that silk is made after degumming, dissolving, dialysis, purification.
Preferably, the trivalent iron salt is the one or more in iron chloride, ferric sulfate, ferric nitrate.
Compared with prior art, the advantage of the invention is that：PAMAM is polyamidoamine dendrimer, and surface is rich
Containing amino, imido grpup.To be modified salix cellulose and silk-fibroin as carrier, PAMAM is crosslinking agent, is produced between the two firm
Covalent bonding together, nano ferriferrous oxide granule is generated, and silk-salix monogolica is obtained after crosslinking, liquid nitrogen, freeze-drying process
It is composite porous, final load graphene oxide, it ensure that dispersing uniformity of the graphene oxide in silk-salix monogolica matrix
With the Stability Analysis of Structures and mechanical strength of silk-salix monogolica porous material, silk-salix monogolica composite after calcium ion crosslinking has close
Spend big low, intensity, high temperature resistant, the advantages that specific surface area is big, adsorption capacity is strong.Graphene oxide-nano combined the material of silk-salix monogolica
Material has certain magnetic, it is possible to achieve effective to recycle.
Embodiment
The invention will be further elucidated with reference to specific embodiments.
Embodiment 1：
（1）Salix cellulose is immersed into the NaOH solution 60min that mass fraction is 15%, bath raio 1 under normal temperature:50, use deionized water
Neutrality is washed till, is dried；Salix cellulose after NaOH is handled is dispersed in water again, bath raio 1:50, glutaraldehyde is added, wherein
The volume ratio of glutaraldehyde and the salix monogolica aqueous solution is 1:10,1h is reacted, is slowly added to the 10g/L polyamide-amide PAMAM aqueous solution,
The volume ratio of wherein the PAMAM aqueous solution and the salix cellulose aqueous solution is 1:5, after reacting 24h, washed repeatedly with distilled water and ethanol
Wash, PAMAM modification salix celluloses are obtained after drying；（2）Silk-fibroin is dissolved in deionized water, is configured to the water-soluble of 10g/L
Liquid, 10g/L ferric chloride in aqueous solution is slowly dropped into silk protein aqueous solution under conditions of 50 DEG C, stirred, wherein institute
The mass ratio for stating silk-fibroin and iron chloride is 10:1, it is molten as 1wt% calcium chloride that concentration is added dropwise using 30 drops/min speed
The mass ratio of liquid, calcium chloride and silk-fibroin is 1:10, after regulation pH value at the uniform velocity stirs 1h to 10,60 DEG C, it is slowly added to step 1
In PAMAM be modified salix cellulose, the mass ratio of modified salix cellulose and silk-fibroin is 1:10, after reacting 24h, pour into mould
In tool, 1min in liquid nitrogen is put into, pre-freeze 6h in -20 DEG C of refrigerators is placed in after taking-up, is freezed in -80 DEG C of Thermo ultra low temperature freezers
6h, it is then placed in 48h in freeze dryer and obtains magnetic porous composite material；（3）Configuration concentration 10g/L graphene oxide is water-soluble
Liquid, ultrasonic 1h, the magnetic porous composite material in step 2 is then immersed in 24h in graphene oxide water solution, bath raio 1:
50, cleaned repeatedly with ethanol and deionized water after taking-up, it is nano combined that graphene oxide-silk-salix monogolica is obtained after vacuum drying
Material.
Embodiment 2：
（1）Salix cellulose is immersed into the NaOH solution 60min that mass fraction is 15%, bath raio 1 under normal temperature:50, use deionized water
Neutrality is washed till, is dried；Salix cellulose after NaOH is handled is dispersed in water again, bath raio 1:50, glutaraldehyde is added, wherein
The volume ratio of glutaraldehyde and the salix monogolica aqueous solution is 1:15,1h is reacted, is slowly added to the 50g/L polyamide-amide PAMAM aqueous solution,
The volume ratio of wherein the PAMAM aqueous solution and the salix cellulose aqueous solution is 1:8, after reacting 24h, washed repeatedly with distilled water and ethanol
Wash, PAMAM modification salix celluloses are obtained after drying；（2）Silk-fibroin is dissolved in deionized water, is configured to the water-soluble of 50g/L
Liquid, 50g/L ferric sulfate aqueous solution is slowly dropped into silk protein aqueous solution under conditions of 80 DEG C, stirred, wherein institute
The mass ratio for stating silk-fibroin and ferric sulfate is 1:1, calcium chloride solution of the concentration as 2wt% is added dropwise using 30 drops/min speed,
The mass ratio of calcium chloride and silk-fibroin is 1:20, after regulation pH value at the uniform velocity stirs 1h to 11,60 DEG C, it is slowly added in step 1
PAMAM is modified salix cellulose, and the mass ratio for being modified salix cellulose and silk-fibroin is 1:1, after reacting 24h, pour into mould,
1min in liquid nitrogen is put into, pre-freeze 6h in -20 DEG C of refrigerators is placed in after taking-up, freezes 6h in -80 DEG C of Thermo ultra low temperature freezers, then
It is put into 48h in freeze dryer and obtains magnetic porous composite material；（3）Configuration concentration 20g/L graphene oxide water solution, ultrasound
1h, the magnetic porous composite material in step 2 is then immersed in 24h in graphene oxide water solution, bath raio 1:50, take out
Cleaned repeatedly with ethanol and deionized water afterwards, graphene oxide-silk-salix monogolica nano composite material is obtained after vacuum drying.
Embodiment 3：
（1）Salix cellulose is immersed into the NaOH solution 60min that mass fraction is 15%, bath raio 1 under normal temperature:50, use deionized water
Neutrality is washed till, is dried；Salix cellulose after NaOH is handled is dispersed in water again, bath raio 1:50, glutaraldehyde is added, wherein
The volume ratio of glutaraldehyde and the salix monogolica aqueous solution is 1:20,1h is reacted, is slowly added to the 80g/L polyamide-amide PAMAM aqueous solution,
The volume ratio of wherein the PAMAM aqueous solution and the salix cellulose aqueous solution is 1:10, after reacting 24h, with distilled water and ethanol repeatedly
Washing, PAMAM modification salix celluloses are obtained after drying；（2）Silk-fibroin is dissolved in deionized water, is configured to 80g/L water
Solution, 80g/L iron nitrate aqueous solution is slowly dropped into silk protein aqueous solution under conditions of 60 DEG C, stirred, wherein
The mass ratio of the silk-fibroin and ferric nitrate is 10:1, it is molten as 5wt% calcium chloride that concentration is added dropwise using 30 drops/min speed
The mass ratio of liquid, calcium chloride and silk-fibroin is 1:50, after regulation pH value at the uniform velocity stirs 1h to 12,60 DEG C, it is slowly added to step 1
In PAMAM be modified salix cellulose, the mass ratio of modified salix cellulose and silk-fibroin is 10:1, after reacting 24h, pour into mould
In tool, 1min in liquid nitrogen is put into, pre-freeze 6h in -20 DEG C of refrigerators is placed in after taking-up, is freezed in -80 DEG C of Thermo ultra low temperature freezers
6h, it is then placed in 48h in freeze dryer and obtains magnetic porous composite material；（3）Configuration concentration 100g/L graphene oxide water
Solution, ultrasonic 1h, the magnetic porous composite material in step 2 is then immersed in 24h in graphene oxide water solution, bath raio
1:50, cleaned repeatedly with ethanol and deionized water after taking-up, graphene oxide-silk-salix monogolica nanometer is obtained after vacuum drying and is answered
Condensation material.
Obviously, the above embodiment of the present invention is only intended to clearly illustrate example of the present invention, and is not pair
The restriction of embodiments of the present invention.For those of ordinary skill in the field, may be used also on the basis of the above description
To make other changes in different forms.Here all embodiments can not be exhaustive.It is every to belong to this hair
Row of the obvious changes or variations that bright technical scheme is amplified out still in protection scope of the present invention.
Claims (6)
- A kind of 1. preparation method of graphene oxide-silk-salix monogolica nano composite material, it is characterised in that：Step 1：Salix cellulose is immersed into the NaOH solution 60min that mass fraction is 15%, bath raio 1 under normal temperature:50, spend from Son is washed to neutrality, drying；Salix cellulose after NaOH is handled is dispersed in water again, bath raio 1:50, glutaraldehyde is added, The volume ratio of wherein glutaraldehyde and the salix monogolica aqueous solution is 1:10-1:25,1h is reacted, is slowly added to 1-100g/L polyamide-amide The volume ratio of the PAMAM aqueous solution, wherein the PAMAM aqueous solution and the salix cellulose aqueous solution is 1:5-1:10, after reacting 24h, use Distilled water and ethanol wash, PAMAM modification salix celluloses are obtained after drying repeatedly；Step 2：Silk-fibroin is dissolved in deionized water, is configured to the 1g/L-100g/L aqueous solution, will under conditions of 50-80 DEG C The 1g/L-100g/L trivalent iron salt aqueous solution is slowly dropped into silk protein aqueous solution, is stirred, wherein the silk-fibroin Mass ratio with trivalent iron salt is 1:1-10:1, it is molten as 1-5wt% calcium chloride that concentration is added dropwise using 30 drops/min speed Liquid, regulation pH value to 10-12, after 60 DEG C are at the uniform velocity stirred 1h, the PAMAM being slowly added in step 1 is modified salix cellulose, instead After answering 24h, pour into mould, be put into 1min in liquid nitrogen, pre-freeze 6h in -20 DEG C of refrigerators is placed in after taking-up, -80 DEG C of Thermo are ultralow 6h is freezed in temperature refrigerator, 48h in freeze dryer is then placed in and obtains magnetic porous composite material；Step 3：Configuration concentration 0.1-100g/L graphene oxide water solution, ultrasonic 1h are then more by the magnetic in step 2 Hole composite material is immersed in 24h in graphene oxide water solution, bath raio 1:50, it is repeatedly clear with ethanol and deionized water after taking-up Wash, graphene oxide-silk-salix monogolica nano composite material is obtained after vacuum drying.
- 2. the preparation method of graphene oxide-silk-salix monogolica nano composite material according to claim 1, its feature exist In the silk-fibroin is that silk is made after degumming, dissolving, dialysis, purification.
- 3. the preparation method of graphene oxide-silk-salix monogolica nano composite material according to claim 1, its feature exist In the trivalent iron salt is the one or more in iron chloride, ferric sulfate, ferric nitrate.
- 4. the preparation method of graphene oxide-silk-salix monogolica nano composite material according to claim 1, its feature exist In the mass ratio of the calcium chloride and silk-fibroin is 1:10-1:50.
- 5. the preparation method of graphene oxide-silk-salix monogolica nano composite material according to claim 1, its feature exist In the mass ratio of the modified salix cellulose and silk-fibroin is 1:10-10:1.
- A kind of 6. graphene oxide-silk-salix monogolica nano composite material obtained by claim 1 preparation method.
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| CN113026347A (en) * | 2021-02-20 | 2021-06-25 | 河北科技大学 | Graphene oxide/fiber composite material and adsorption method thereof |
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| CN104479174A (en) * | 2014-12-14 | 2015-04-01 | 苏州大学 | Cellulose-based magnetic aerogel material and preparation method thereof |
| CN104761749A (en) * | 2015-04-03 | 2015-07-08 | 四川大学 | Cellulose nanofiber hyperbranched modification method |
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| CN103572395A (en) * | 2013-11-14 | 2014-02-12 | 东华大学 | Strengthened toughened regenerated silk fibers and preparation method thereof |
| CN104264259A (en) * | 2014-10-15 | 2015-01-07 | 钱景 | Graphene and salix psammophila regenerated cellulose blended fiber and preparation method thereof |
| CN104479174A (en) * | 2014-12-14 | 2015-04-01 | 苏州大学 | Cellulose-based magnetic aerogel material and preparation method thereof |
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Application publication date: 20180109 |