Preparation method of cellulose and chitosan hybrid fiber
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A technology of chitosan and cellulose, applied in the direction of cellulose/protein conjugated artificial filaments, fiber chemical characteristics, conjugated artificial filaments, etc., can solve uneven pores, uneven mixed fibers, and unstable structural properties and other problems, to achieve the effect of easy operation, excellent performance and simple process
Active Publication Date: 2015-12-30
JIANGSU UNIV OF SCI & TECH
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[0005] Zhou Jiacun et al. (Study on the dyeing process of chitosan and cellulose fiber blended fabrics. Fiber Technology Textiles. 2011) treated cellulose and chitosan separately, simply mixed, and could not form homogeneous miscellaneous fibers, and cellulose could not be mixed with shell. Polysaccharides form chemical bonds, just simply mixed, close together in space, so the mixed fibers formed are not uniform, with large and small uneven pores inside, and the structural properties are unstable
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[0024] The invention provides a kind of preparation method of mixed fiber of cellulose and chitosan, its process flow chart is as follows figure 1 shown, including the following steps:
[0025] (1) Wash, dry, and pulverize the cellulose to obtain cellulose powder; mix the cellulose powder with the acidic ionic liquid mixture, keep warm at 30°C to 150°C, add a carboxylation reagent, and stir to complete the dissolution of the cellulose and Modified to obtain product A;
[0026] (2) Get chitosan and acidic ionic liquid mixed solution and mix uniformly, heat treatment, obtain product B, acidic ionic liquid mixed solution is used as solvent and catalyst;
[0027] (3) Mix the products A and B obtained in steps (1) and (2), heat and stir to react evenly, and obtain a sample;
[0028] (4) Add fiber regeneration reagent to the sample obtained in step (3) to wash and remove the liquid preparation in the sample, recover the ionic liquid in the liquid preparation, and dry the solid to ...
Embodiment 1
[0031] Embodiment 1. The preparation method of acidic ionic liquid mixed solution ([AMIM][Cl]-DMSO mixed solution).
[0032] Mix 5g of ionic liquid [AMIM][Cl] and 0.2g of DMSO uniformly, and heat with magnetic stirring at 110°C to obtain.
Embodiment 2
[0033] Embodiment 2. The preparation method of acidic ionic liquid mixed solution ([BmpyM][Cl]-dimethylformamide).
[0034] Mix 4g of ionic liquid [BmpyM][Cl] with 0.2g of dimethylformamide, and heat at 80°C with magnetic stirring.
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Abstract
The invention discloses a preparation method of a cellulose and chitosan hybrid fiber. The preparation method comprises the following steps of (1) taking and drying cellulose, crushing to obtain cellulose powder; taking the mixed liquor of the cellulose powder and acidic ionic liquid, performing heat preservation, adding a carboxylation agent, stirring, and performing heat treatment; (2) taking and uniformly mixing the mixed liquor of the cellulose powder and the acidic ionic liquid, and performing heat treatment; (3) mixing the products of the step (1) and the step (2), heating, stirring and uniformly reacting; (4) adding a regeneration agent into an obtained sample to wash out liquid reagents such as acidic ionic liquid mixed liquor, and a solid is dried to obtain the hybrid fiber. The hybrid fiber obtained by the preparation method has the characteristics of good water-retaining property, high heat stability, antibiosis, environmental protection, ventilation, moisture prevention, porous property and the like. A reactant is stable in a reaction process, and by-products cannot be produced. The fiber has wide prospect in the fields of drug carriers, enzyme carriers, adsorbed substances and the like.
Description
technical field [0001] The invention belongs to the field of biochemical industry, and in particular relates to a preparation method of mixed fibers of cellulose and chitosan. Background technique [0002] Chitosan is a natural biopolymer obtained by deacetylation of chitin. Chitin is the nitrogen-containing natural organic compound with the largest amount on the earth except protein. Chitosan has the advantages of non-toxicity, no side effects, good biocompatibility, biodegradability, and no environmental pollution. It can be used to make ultrafiltration membranes, separation membranes, edible membranes, biodegradable membranes, medical membranes, and food preservation. film etc. Due to its wide range of uses, chitosan membranes have become a hot topic in current research and development in the industry. [0003] Cellulose is an inexhaustible and inexhaustible natural polymer mainly synthesized by plants through photosynthesis in nature. It is mainly used in textile, pape...
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