CN103613790B - A kind of preparation method of cellulose base matrix material - Google Patents
A kind of preparation method of cellulose base matrix material Download PDFInfo
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- CN103613790B CN103613790B CN201310587210.0A CN201310587210A CN103613790B CN 103613790 B CN103613790 B CN 103613790B CN 201310587210 A CN201310587210 A CN 201310587210A CN 103613790 B CN103613790 B CN 103613790B
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Abstract
The present invention relates to a kind of preparation method of cellulose base matrix material, the method step is for preparing cellulose solution and lithium magnesium silicate solution, by cellulose solution and the mixing of lithium magnesium silicate solution, in precipitation bath, solidify regeneration, through washing, dry obtained cellulose base matrix material.Present invention utilizes lithium magnesium silicate and can form highly stable flaky nanometer structure in aqueous systems, obtain the dispersed ultrafine of lithium magnesium silicate nano particle in cellulose solution, prepare the cellulose base matrix material that compact and uniform structure and tensile property significantly improve; Without the need to disperseing by any tensio-active agent, thus step is simple, has good actual application value.
Description
Technical field
The present invention relates to a kind of preparation method of cellulose base matrix material, be specifically related to utilize lithium magnesium silicate can be formed in Mierocrystalline cellulose network structure object that dispersed ultrafine reaches improvement and fortifying fibre cellulosic material, belong to macromolecule material preparation area.
Background technology
Based on the needs of environment protection and Sustainable Development, the key content of the current polymer research that develops with Mierocrystalline cellulose that to be the bio-based materials of representative be.As the natural polymer that occurring in nature enriches the most, Mierocrystalline cellulose is with low cost, environmental friendliness, particularly there is higher biocompatibility and biodegradability, be all expected to replace petrochemicals at numerous areas such as daily life, food, medicine, materials.On the one hand, Mierocrystalline cellulose can generate derivatived cellulose by chemical modification, common as carboxymethyl cellulose, Natvosol, hydroxypropylcellulose etc. be all common cellulose-derived products; On the other hand, Mierocrystalline cellulose can directly be used for preparing cellulose-based material without the need to derivatize.But, there is to preparation the cellulose-based material of superior performance (high strength, high-clarity, high evenness), as cellulosefilm, fiber, aerogel etc., the best way first Mierocrystalline cellulose is carried out non-derivative dissolving, cellulose dissolution system is regenerated in specific precipitation bath putting before this, the cellulose materials of comparatively even compact could be obtained; N,N-dimethylacetamide/lithium chloride (DMAc/LiCl) system is had at present, 4-methyhnorpholine-N-oxide/water (NMMO/ water) system, ion liquid system etc. about cellulosic dissolution system.
Although adopt the method that Mierocrystalline cellulose dissolves in advance can prepare the comparatively uniform cellulose materials of structure, still there is the shortcomings such as structure is comparatively loose, mechanical strength is lower, Practical Performance is poor in prepared Single Fiber cellulosic material.The approach of effective raising Mierocrystalline cellulose performance adds nano particle wherein to prepare a Mierocrystalline cellulose nano composite material, such as polynite, carbon nanotube, graphene oxide etc.Be characterized in that Mierocrystalline cellulose and the nano particle be scattered in wherein rely on hydrogen bond action to form being cross-linked to a certain degree, make cellulosic structure dense uniform more, thus improve cellulosic mechanical property.The nano material such as carbon nanotube, Graphene, because having higher specific surface or length-to-diameter ratio, is excellent matrix material functional additive.Have been reported in document and utilize ion liquid dissolving Mierocrystalline cellulose, and prepare cellulose/carbon nano (Graphene) nano composite material by carbon nanotube or the dispersiveness good in ionic liquid of Graphene.But carbon nanotube and Graphene have strong nonpolar and higher surface energy, be thus difficult to be scattered in aqueous systems equably, so seldom see the report utilizing aqueous systems to prepare cellulose/carbon nano (Graphene) nano composite material in document.Equally, the subparticles such as such as polynite need to carry out organically-modified, well could peel off and obtain flake nano structure, otherwise as easy as rolling off a log precipitation and can not being dispersed in solvent system.And organic modification montmonrillonite is also only confined to could disperse preferably in organic medium (as ionic liquid), obtains montmorillonite particle dispersion good in cellulose materials to prepare Mierocrystalline cellulose/Nano composite material of montmorillonite with this.Thus, all there is the factors such as easy coagulation, difficult dispersion or difficult stripping in the nano particle such as carbon nanotube, Graphene, polynite in aqueous systems, thus constrain and utilize cellulosic water dissolution system to carry out the preparation of Mierocrystalline cellulose nano composite material, be difficult to the Mierocrystalline cellulose nano composite material obtaining compact and uniform structure, thus effectively improve the mechanical property of cellulose-based material.
Chinese patent literature CN1869114A(application number: 200610043043.3) disclose a kind of straw fiber/Nanometer Composite Material Of Montmorillonite And Its Preparation Method.This matrix material is evenly inserted in montmorillonite layer by Mierocrystalline cellulose, polynite and Mierocrystalline cellulose combined closely and is dispersed in Mierocrystalline cellulose with nanoscale to obtain; Combine the advantage of Mierocrystalline cellulose and polynite, there is the advantage that traditional material is incomparable; Elasticity and thermotolerance substantially increase the workability of matrix material, are with a wide range of applications in fields such as space flight, physical culture and environmental protection.But the method needs to carry out modification to polynite, and montmorillonite-based nano particle easy coagulation in aqueous systems, the straw fiber/Nano composite material of montmorillonite performance of preparation is not good.
Summary of the invention
Easily occur to assemble and precipitation for ultra-fine grain in prior art, be difficult to stable dispersion in cellulosic aqueous systems, be difficult to obtain structure homogeneous, the deficiency of the cellulose composite material of satisfactory mechanical property, the invention provides a kind of preparation method of cellulose base matrix material, the preparation method of a kind of Mierocrystalline cellulose/lithium magnesium silicate matrix material is especially provided, lithium magnesium silicate is utilized easily to form uniform and stable nanometer disperse system in aqueous systems, obtain the dispersed ultrafine system of lithium magnesium silicate nano-sheet particle in cellulose solution, improve structure and the mechanical property of cellulose base matrix material.
Technical scheme of the present invention is as follows:
A preparation method for cellulose base matrix material, step is as follows:
(1) sodium hydroxide/aqueous solution of urea is refrigerated to-12 ~-16 DEG C, is that 1 ~ 5wt% adds Mierocrystalline cellulose by cellulose concentration, is stirred to Mierocrystalline cellulose and dissolves completely, obtain cellulosic sodium hydroxide/aqueous solution of urea; In described sodium hydroxide/aqueous solution of urea, the concentration of sodium hydroxide is 6 ~ 10wt%, and the concentration of urea is 10 ~ 15wt%; Described Mierocrystalline cellulose is linters or dissolving pulp;
(2) be that lithium magnesium silicate is scattered in water by 0.02 ~ 1wt% by lithium magnesium silicate concentration, be that 6 ~ 8wt% adds sodium hydroxide by naoh concentration, or by the concentration of sodium hydroxide be 6 ~ 8wt%, the concentration of urea is the mixture that 10 ~ 15wt% adds sodium hydroxide and urea; Be uniformly dispersed, obtain lithium magnesium silicate dispersion liquid;
(3) the lithium magnesium silicate dispersion liquid that cellulosic sodium hydroxide/aqueous solution of urea step (1) obtained and step (2) obtain is (1 ~ 5) by weight: 1 mixes, and obtains the composite dispersion liquid of Mierocrystalline cellulose/lithium magnesium silicate;
(4) composite dispersion liquid of Mierocrystalline cellulose/lithium magnesium silicate is put into precipitation bath to soak, make the composite dispersion liquid of Mierocrystalline cellulose/lithium magnesium silicate solidify regeneration, through washing, drying, obtain cellulose base matrix material.
According to the present invention, preferably, in the sodium hydroxide/aqueous solution of urea described in step (1), the concentration of sodium hydroxide is 7 ~ 8wt%, and the concentration of urea is 12 ~ 14wt%; Described linters or the polymerization degree of dissolving pulp are 100 ~ 600.Described linters or dissolving pulp are conventional commercial products.
According to the present invention, preferably, be that lithium magnesium silicate is scattered in water by 0.1 ~ 0.3wt% by lithium magnesium silicate concentration in step (2); Described lithium magnesium silicate is nanometer lithium magnesium silicate powder, transmittance >=99%, commercial products.
According to the present invention, preferably, the precipitation bath described in step (4) to be volume ratio be 1/9 ~ 9/1 acetone/water mixing solutions, or, containing the mixing solutions of 5wt% sulfuric acid and 5wt% sodium sulfate; The temperature of described precipitation bath is 5 ~ 50 DEG C, more preferably 10 ~ 30 DEG C;
Described soak time is 5 ~ 30min, and the mode of described washing is for being soaked in water 20 ~ 60min or with water wash 20 ~ 60min, described is dried to water content≤15wt%.
According to the present invention, a preferred embodiment is as follows:
A preparation method for cellulose base matrix material, step is as follows:
(1) sodium hydroxide/aqueous solution of urea is refrigerated to-14 DEG C, is that 3wt% adds Mierocrystalline cellulose by cellulose concentration, is stirred to Mierocrystalline cellulose and dissolves completely, obtain cellulosic sodium hydroxide/aqueous solution of urea; In described sodium hydroxide/aqueous solution of urea, the concentration of sodium hydroxide is 7wt%, and the concentration of urea is 12wt%; Described Mierocrystalline cellulose to be the polymerization degree be 525 dissolving pulp;
(2) be that lithium magnesium silicate is scattered in water by 0.3wt% by lithium magnesium silicate concentration, be that 7wt% adds sodium hydroxide by naoh concentration, be uniformly dispersed, obtain lithium magnesium silicate dispersion liquid;
(3) the lithium magnesium silicate dispersion liquid that cellulosic sodium hydroxide/aqueous solution of urea step (1) obtained and step (2) obtain mixes by weight 2:1, obtains the composite dispersion liquid of Mierocrystalline cellulose/lithium magnesium silicate;
(4) composite dispersion liquid of Mierocrystalline cellulose/lithium magnesium silicate is put into precipitation bath and soak 20min, make the composite dispersion liquid of Mierocrystalline cellulose/lithium magnesium silicate solidify regeneration, wash through distilled water immersion 20min, be dried to water content≤15wt%, obtain cellulose base matrix material; The acetone/water mixing solutions of described precipitation bath to be volume ratio be 2:1, the temperature of precipitation bath is 20 DEG C.
The present invention utilizes lithium magnesium silicate as additive, and its advantage effectively to overcome the shortcoming that other conventional additives not easily disperse in water; Further, lithium magnesium silicate is tasteless, nontoxic, nonirritant, has high security, usually for fields such as makeup, medicine, coating.Lithium magnesium silicate is water insoluble, rises without the need to adding any polymer or the surfactant profit that just can be exceedingly fast in water, peel off, disperses to form flaky nanometer structure, finally forms homogeneous, stable nanometer disperse system.And lithium magnesium silicate surface is containing abundant hydroxyl, and lithium magnesium silicate nano particle can form very strong hydrogen bond action with Mierocrystalline cellulose; The distinctive sheet structure of aqueous dispersions mesosilicic acid magnesium lithium determines the lithium magnesium silicate be scattered in Mierocrystalline cellulose can play absorption and cellulosic effect of building bridge effectively, cellulosic molecule is cross-linked the three-dimensional net structure that formation is firm, thus improve the structure of cellulose-based material, improve its evenness, compactness and mechanical property.In a word, based on the characteristic of lithium magnesium silicate fast and stable dispersion in aqueous systems, lithium magnesium silicate superfine nano platy shaped particle is dispersed in Mierocrystalline cellulose aqueous systems, prepare the nano dispersion fluid of Mierocrystalline cellulose and lithium magnesium silicate compound, and then obtain Mierocrystalline cellulose/lithium magnesium silicate nano composite material, the performance of cellulose materials is improved with this.
Compared with the existing method preparing cellulose composite material, characteristics and advantages of the present invention is:
1, present invention utilizes lithium magnesium silicate and can form highly stable flaky nanometer structure in aqueous systems, obtain the dispersed ultrafine of lithium magnesium silicate nano particle in cellulose solution, prepare the cellulose base matrix material that compact and uniform structure and tensile property significantly improve.
2, the present invention is without the need to disperseing by any tensio-active agent, and thus step is simple, has good actual application value.
Accompanying drawing explanation
Fig. 1 is the tensile strength curve of pure cellulose material prepared by the cellulose base matrix material prepared of embodiment of the present invention 1-4 and comparative example.
Fig. 2 is the stereoscan photograph of pure cellulose material prepared by comparative example of the present invention.
Fig. 3 is the stereoscan photograph of cellulose base matrix material prepared by the embodiment of the present invention 1.
Fig. 4 is the stereoscan photograph of cellulose base matrix material prepared by the embodiment of the present invention 3.
Embodiment
Below by specific embodiment, the present invention will be further described, but be not limited thereto.
Raw materials usedly in embodiment be conventional reagent, commercial products; Wherein: lithium magnesium silicate, Hui Zhi Fine Chemical Co., Ltd in Sihong County is on sale; Embodiment 1-9 and comparative example Mierocrystalline cellulose used are dissolving pulp, and the polymerization degree is 525, and Shandong YINYING Chemical Fiber Co., Ltd is on sale.
Embodiment 1
A preparation method for cellulose base matrix material, step is as follows:
(1) sodium hydroxide/aqueous solution of urea is refrigerated to-14 DEG C, is that 3wt% adds Mierocrystalline cellulose by cellulose concentration, is stirred to Mierocrystalline cellulose and dissolves completely, obtain cellulosic sodium hydroxide/aqueous solution of urea; In described sodium hydroxide/aqueous solution of urea, the concentration of sodium hydroxide is 7wt%, and the concentration of urea is 12wt%;
(2) be that lithium magnesium silicate is scattered in water by 0.1wt% by lithium magnesium silicate concentration, be that 7wt% adds sodium hydroxide by naoh concentration, be uniformly dispersed, obtain lithium magnesium silicate dispersion liquid;
(3) the lithium magnesium silicate dispersion liquid that cellulosic sodium hydroxide/aqueous solution of urea step (1) obtained and step (2) obtain mixes by weight 2:1, obtains the composite dispersion liquid of Mierocrystalline cellulose/lithium magnesium silicate;
(4) composite dispersion liquid of Mierocrystalline cellulose/lithium magnesium silicate is put into precipitation bath and soak 20min, make the composite dispersion liquid of Mierocrystalline cellulose/lithium magnesium silicate solidify regeneration, wash through distilled water immersion 20min, be dried to water content≤15wt%, obtain cellulose base matrix material; The acetone/water mixing solutions of described precipitation bath to be volume ratio be 2:1, the temperature of precipitation bath is 20 DEG C.
Embodiment 2
A preparation method for cellulose base matrix material, step with embodiment 1, unlike:
Be that lithium magnesium silicate is scattered in water by 0.2wt% by lithium magnesium silicate concentration in step (2).
Embodiment 3
A preparation method for cellulose base matrix material, step with embodiment 1, unlike:
Be that lithium magnesium silicate is scattered in water by 0.3wt% by lithium magnesium silicate concentration in step (2).
Embodiment 4
A preparation method for cellulose base matrix material, step with embodiment 1, unlike:
Be that lithium magnesium silicate is scattered in water by 0.4wt% by lithium magnesium silicate concentration in step (2).
Embodiment 5
A preparation method for cellulose base matrix material, step is as follows:
(1) sodium hydroxide/aqueous solution of urea is refrigerated to-12 DEG C, is that 3wt% adds Mierocrystalline cellulose by cellulose concentration, is stirred to Mierocrystalline cellulose and dissolves completely, obtain cellulosic sodium hydroxide/aqueous solution of urea; In described sodium hydroxide/aqueous solution of urea, the concentration of sodium hydroxide is 7wt%, and the concentration of urea is 12wt%;
(2) be that lithium magnesium silicate is scattered in water by 0.1wt% by lithium magnesium silicate concentration, be that 7wt% adds sodium hydroxide by naoh concentration, be uniformly dispersed, obtain lithium magnesium silicate dispersion liquid;
(3) the lithium magnesium silicate dispersion liquid that cellulosic sodium hydroxide/aqueous solution of urea step (1) obtained and step (2) obtain mixes by weight 2:1, obtains the composite dispersion liquid of Mierocrystalline cellulose/lithium magnesium silicate;
(4) composite dispersion liquid of Mierocrystalline cellulose/lithium magnesium silicate is put into precipitation bath and soak 20min, make the composite dispersion liquid of Mierocrystalline cellulose/lithium magnesium silicate solidify regeneration, wash through distilled water immersion 20min, be dried to water content≤15wt%, obtain cellulose base matrix material; Described precipitation bath is the mixing solutions containing 5wt% sulfuric acid and 5wt% sodium sulfate.
Embodiment 6
A preparation method for cellulose base matrix material, step is as follows:
(1) sodium hydroxide/aqueous solution of urea is refrigerated to-16 DEG C, is that 2wt% adds Mierocrystalline cellulose by cellulose concentration, is stirred to Mierocrystalline cellulose and dissolves completely, obtain cellulosic sodium hydroxide/aqueous solution of urea; In described sodium hydroxide/aqueous solution of urea, the concentration of sodium hydroxide is 6wt%, and the concentration of urea is 10wt%;
(2) be that lithium magnesium silicate is scattered in water by 0.4wt% by lithium magnesium silicate concentration, by the concentration of sodium hydroxide be 6wt%, the concentration of urea is the mixture that 10wt% adds sodium hydroxide and urea, be uniformly dispersed, obtain lithium magnesium silicate dispersion liquid;
(3) the lithium magnesium silicate dispersion liquid that cellulosic sodium hydroxide/aqueous solution of urea step (1) obtained and step (2) obtain mixes by weight 4:1, obtains the composite dispersion liquid of Mierocrystalline cellulose/lithium magnesium silicate;
(4) composite dispersion liquid of Mierocrystalline cellulose/lithium magnesium silicate is put into precipitation bath and soak 30min, make the composite dispersion liquid of Mierocrystalline cellulose/lithium magnesium silicate solidify regeneration, wash through distilled water immersion 30min, be dried to water content≤15wt%, obtain cellulose base matrix material; Described precipitation bath is the mixing solutions containing 5wt% sulfuric acid and 5wt% sodium sulfate.
Embodiment 7
A preparation method for cellulose base matrix material, step with embodiment 6, unlike:
Be that 5wt% adds Mierocrystalline cellulose by cellulose concentration in step (1);
Be that lithium magnesium silicate is scattered in water by 0.2wt% by lithium magnesium silicate concentration in step (2);
Solidify in step (4) regeneration after with distilled water drip washing 30min, be dried to water content≤15wt%, obtain cellulose base matrix material.
Embodiment 8
A preparation method for cellulose base matrix material, step is as follows:
(1) sodium hydroxide/aqueous solution of urea is refrigerated to-16 DEG C, is that 4wt% adds Mierocrystalline cellulose by cellulose concentration, is stirred to Mierocrystalline cellulose and dissolves completely, obtain cellulosic sodium hydroxide/aqueous solution of urea; In described sodium hydroxide/aqueous solution of urea, the concentration of sodium hydroxide is 9wt%, and the concentration of urea is 14wt%;
(2) be that lithium magnesium silicate is scattered in water by 0.3wt% by lithium magnesium silicate concentration, by the concentration of sodium hydroxide be 9wt%, the concentration of urea is the mixture that 14wt% adds sodium hydroxide and urea, be uniformly dispersed, obtain lithium magnesium silicate dispersion liquid;
(3) the lithium magnesium silicate dispersion liquid that cellulosic sodium hydroxide/aqueous solution of urea step (1) obtained and step (2) obtain mixes by weight 2:1, obtains the composite dispersion liquid of Mierocrystalline cellulose/lithium magnesium silicate;
(4) composite dispersion liquid of Mierocrystalline cellulose/lithium magnesium silicate is put into precipitation bath and soak 20min, make the composite dispersion liquid of Mierocrystalline cellulose/lithium magnesium silicate solidify regeneration, wash through distilled water immersion 40min, be dried to water content≤15wt%, obtain cellulose base matrix material; The acetone/water mixing solutions of described precipitation bath to be volume ratio be 5:1, the temperature of precipitation bath is 10 DEG C.
Embodiment 9
A preparation method for cellulose base matrix material, step with embodiment 8, unlike:
In step (1), be that 5wt% adds Mierocrystalline cellulose by cellulose concentration; In described sodium hydroxide/aqueous solution of urea, the concentration of sodium hydroxide is 10wt%, and the concentration of urea is 15wt%;
Be that lithium magnesium silicate is scattered in water by 0.4wt% by lithium magnesium silicate concentration in step (2);
Solidify in step (4) regeneration after with distilled water drip washing 30min, be dried to water content≤15wt%, obtain cellulose base matrix material; The acetone/water mixing solutions of described precipitation bath to be volume ratio be 5:1, the temperature of precipitation bath is 30 DEG C.
Comparative example
The not preparation of the pure cellulose material of magnesium silicate lithium, step is as follows:
(1) sodium hydroxide/aqueous solution of urea is refrigerated to-14 DEG C, is that 3wt% adds Mierocrystalline cellulose by cellulose concentration, is stirred to Mierocrystalline cellulose and dissolves completely, obtain cellulosic sodium hydroxide/aqueous solution of urea; In described sodium hydroxide/aqueous solution of urea, the concentration of sodium hydroxide is 7wt%, and the concentration of urea is 12wt%;
(2) by the cellulosic sodium hydroxide/aqueous solution of urea in step (1) in volume ratio be 2:1 acetone/water mixing solutions in soak 20min, Mierocrystalline cellulose is made to solidify regeneration, wash through distilled water immersion 40min, be dried to water content≤15wt%, obtain pure cellulose material.
Experimental example
Pure cellulose testing of materials tensile strength properties prepared by the cellulose base matrix material containing different lithium magnesium silicate particle prepared by embodiment 1-4 and comparative example, test result is as shown in Figure 1; As shown in Figure 1, the cellulose base matrix material tensile strength that prepared by embodiment 1-4 obviously raises.
Fig. 2 is the stereoscan photograph of pure cellulose material cross-section prepared by comparative example, Fig. 3 is the stereoscan photograph of the cellulose base composite cross-sections of magnesium silicate lithium particle prepared by embodiment 1, Fig. 4 is the stereoscan photograph of the cellulose base composite cross-sections of magnesium silicate lithium particle prepared by embodiment 3, from Fig. 2,3,4, pure cellulose material prepared by comparative example is coarse, loose uneven; The cellulose base matrix material more dense uniform of magnesium silicate lithium particle prepared by embodiment 1,3.
Claims (5)
1. a preparation method for cellulose base matrix material, step is as follows:
(1) sodium hydroxide/aqueous solution of urea is refrigerated to-12 ~-16 DEG C, is that 1 ~ 5wt% adds Mierocrystalline cellulose by cellulose concentration, is stirred to Mierocrystalline cellulose and dissolves completely, obtain cellulosic sodium hydroxide/aqueous solution of urea; In described sodium hydroxide/aqueous solution of urea, the concentration of sodium hydroxide is 6 ~ 10wt%, and the concentration of urea is 10 ~ 15wt%; Described Mierocrystalline cellulose is linters or dissolving pulp;
(2) be that lithium magnesium silicate is scattered in water by 0.02 ~ 1wt% by lithium magnesium silicate concentration, be that 6 ~ 8wt% adds sodium hydroxide by naoh concentration, or by the concentration of sodium hydroxide be 6 ~ 8wt%, the concentration of urea is the mixture that 10 ~ 15wt% adds sodium hydroxide and urea; Be uniformly dispersed, obtain lithium magnesium silicate dispersion liquid;
(3) the lithium magnesium silicate dispersion liquid that cellulosic sodium hydroxide/aqueous solution of urea step (1) obtained and step (2) obtain is (1 ~ 5) by weight: 1 mixes, and obtains the composite dispersion liquid of Mierocrystalline cellulose/lithium magnesium silicate;
(4) composite dispersion liquid of Mierocrystalline cellulose/lithium magnesium silicate is put into precipitation bath to soak, make the composite dispersion liquid of Mierocrystalline cellulose/lithium magnesium silicate solidify regeneration, through washing, drying, obtain cellulose base matrix material;
Described precipitation bath to be volume ratio be 1/9 ~ 9/1 acetone/water mixing solutions, or, containing the mixing solutions of 5wt% sulfuric acid and 5wt% sodium sulfate; The temperature of described precipitation bath is 5 ~ 50 DEG C.
2. the preparation method of cellulose base matrix material according to claim 1, is characterized in that, in the sodium hydroxide/aqueous solution of urea described in step (1), the concentration of sodium hydroxide is 7 ~ 8wt%, and the concentration of urea is 12 ~ 14wt%.
3. the preparation method of cellulose base matrix material according to claim 1, is characterized in that, the linters described in step (1) or the polymerization degree of dissolving pulp are 100 ~ 600.
4. the preparation method of cellulose base matrix material according to claim 1, it is characterized in that, soak time described in step (4) is 5 ~ 30min, and the mode of described washing is for being soaked in water 20 ~ 60min or with water wash 20 ~ 60min, described is dried to water content≤15wt%.
5. a preparation method for cellulose base matrix material, step is as follows:
(1) sodium hydroxide/aqueous solution of urea is refrigerated to-14 DEG C, is that 3wt% adds Mierocrystalline cellulose by cellulose concentration, is stirred to Mierocrystalline cellulose and dissolves completely, obtain cellulosic sodium hydroxide/aqueous solution of urea; In described sodium hydroxide/aqueous solution of urea, the concentration of sodium hydroxide is 7wt%, and the concentration of urea is 12wt%; Described Mierocrystalline cellulose to be the polymerization degree be 525 dissolving pulp;
(2) be that lithium magnesium silicate is scattered in water by 0.3wt% by lithium magnesium silicate concentration, be that 7wt% adds sodium hydroxide by naoh concentration, be uniformly dispersed, obtain lithium magnesium silicate dispersion liquid;
(3) the lithium magnesium silicate dispersion liquid that cellulosic sodium hydroxide/aqueous solution of urea step (1) obtained and step (2) obtain mixes by weight 2:1, obtains the composite dispersion liquid of Mierocrystalline cellulose/lithium magnesium silicate;
(4) composite dispersion liquid of Mierocrystalline cellulose/lithium magnesium silicate is put into precipitation bath and soak 20min, make the composite dispersion liquid of Mierocrystalline cellulose/lithium magnesium silicate solidify regeneration, wash through distilled water immersion 20min, be dried to water content≤15wt%, obtain cellulose base matrix material; The acetone/water mixing solutions of described precipitation bath to be volume ratio be 2:1, the temperature of precipitation bath is 20 DEG C.
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| CN106694040A (en) * | 2016-11-30 | 2017-05-24 | 华南理工大学 | Preparation method of quantum dot cellulose-based photocatalytic composite material |
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| CN107973920A (en) * | 2017-11-15 | 2018-05-01 | 深圳大学 | A kind of cellulose/two-dimensional layer Material cladding hydrogel and preparation method thereof |
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| CN109082119B (en) * | 2018-07-02 | 2021-04-02 | 东营欣邦电子科技有限公司 | Cellulose modified polyimide corona-resistant film and preparation method thereof |
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| CN110684216A (en) * | 2019-10-20 | 2020-01-14 | 南京理工大学 | Highly filled regenerated cellulose-based functional composite material and preparation method thereof |
| CN114479165B (en) * | 2022-02-28 | 2023-10-24 | 苏州大学 | Method for preparing composite aerogel from montmorillonite microspheres and regenerated cellulose |
| CN116253972A (en) * | 2023-02-24 | 2023-06-13 | 苏州辰鹏电子新材料有限公司 | Preparation method of reinforced PBT composite material |
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