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Method for preparing chitosan fiber paper-based material based on wet paper-making technology

A technology of chitosan fiber and technology, applied in fiber raw material treatment, pulp beating method, cellulose pulp post-treatment, etc., can solve the problems of incapable of large-scale continuous production, complex operation, etc., and achieve easy modification, good safety, The effect of splitting is obvious

Inactive Publication Date: 2019-01-18
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The method uses chitosan fiber as the main raw material, adopts the basic process of papermaking production, has the advantages of simple operation, continuous production, abundant raw materials and low cost, and overcomes the complicated operation of the existing technology, the need for freezing low temperature and the inability to mass continuous production At the same time, the chitosan fiber paper base material produced based on papermaking technology is a fibrous porous network structure substrate with good physical strength and rich layers, which can be used for biological, pharmaceutical, daily chemical and environmental protection filter materials and other industries, and the papermaking technology and equipment are very mature, and most of the participating media can be reused, which is conducive to reducing costs and realizing industrial production, which can effectively promote the wide application of chitosan fiber paper substrates

Method used

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  • Method for preparing chitosan fiber paper-based material based on wet paper-making technology
  • Method for preparing chitosan fiber paper-based material based on wet paper-making technology
  • Method for preparing chitosan fiber paper-based material based on wet paper-making technology

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Experimental program
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Effect test

Embodiment 1

[0036] First, cut 30 grams of chitosan fibers into lengths of 3mm-5mm, disperse them in water and absorb water for 5 hours in the form of a suspension, and then use a PFI mill to beat them at 8000 rpm when the dryness is 10 wt%. The good pulp fiber is dispersed into a pulp suspension with a concentration of 0.06 wt% by adding deionized water, and after being fully dispersed, sheet forming is carried out on a manual paper sheet machine, and the formed wet paper web is transferred to the press operation table Cover the dry filter paper for roll dehydration treatment, and then transfer the dehydrated wet paper web to a dryer at 90°C for 20 minutes to obtain chitosan fiber paper-based materials, with a weight of 110g / m 2 . The prepared chitosan fiber paper-based material is shown in Figure 1. After the chitosan fiber is beaten, the fiber is finely divided and part of the fiber is nanometerized to form a good fibrous porous structure.

Embodiment 2

[0038]First cut 30 grams of chitosan fibers into lengths of 10-30mm, then soak them in 0.05wt% sodium hydroxide solution for 8 hours, rinse the slurry with deionized water until the pH value of the slurry washing liquid is neutral. When the dryness is 10 wt%, the PFI mill is used to beat it at 20000 rpm, and the beaten pulp fiber is taken and deionized water is dispersed into a pulp suspension with a concentration of 1 wt%. Scatter on the manual sheet machine for sheet forming, transfer the formed wet paper web to the press operation table, cover the dry filter paper for roll dehydration, and then transfer the dehydrated wet paper web to the dryer at 90°C Dried for 20min, the obtained chitosan fiber paper-based material, quantitatively 110g / m 2 .

Embodiment 3

[0040] First cut 30 grams of chitosan fibers into lengths of 25mm-30mm, then absorb water in a 10wt% sodium hydroxide solution for 1 hour, and rinse the slurry with deionized water until the pH value of the slurry washing solution is neutral sex. When the dryness is 10 wt%, the PFI mill is used to beat it at 10000 rpm, and the beaten pulp fiber is dispersed with deionized water to form a slurry suspension with a concentration of 0.03 wt%. Dispersed on the paper sheet machine for sheet forming, transfer the formed wet paper web to the press operation table to cover the dry filter paper for roll dehydration, and then transfer the dehydrated wet paper web to the dryer at 80°C for drying 20min, get 100 g / m 2 Quantitative chitosan fiber paper base material.

[0041] The prepared chitosan fiber paper base material such as figure 2 As shown, the chitosan fiber after beating has good fiber separation, and some fibers are nano-sized, forming a good fibrous porous structure.

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Abstract

The invention discloses a method for preparing a chitosan fiber paper-based material based on a wet paper-making technology. The method comprises the following steps: adding a chitosan fiber materialinto deionized water and an acid or alkali solution of alkene, performing pretreatment, cleaning the pretreated fiber and performing pulping treatment; and diluting the fiber pulp obtained through pulping to obtain fiber suspension, and performing dehydrating and drying treatment by a paper-making former to prepare a chitosan fiber paper base material; or according to the requirements, performingdipping or surface coating treatment on the prepared chitosan fiber paper base material and drying again to obtain a material needing special application. The method is simple and convenient to operate, low in cost and convenient in industrialized product; the production cost of the chitosan material can be greatly reduced; and wide application prospect in the aspects of medical treatment, daily-use chemical industry and special materials is achieved.

Description

technical field [0001] The invention relates to the fields of special materials such as daily chemical, biological, medical and filter membranes, and in particular to a method for preparing chitosan fiber paper-based materials based on wet papermaking technology. Background technique [0002] Chitosan (Chitosan), also known as soluble chitin, chitosan, chitosan, etc., the chemical name is 2-amino-β-1,4-glucan, which is a product obtained after deacetylation of chitin. A natural cationic polysaccharide, chitosan and its derivatives have good biocompatibility, degradability, hygroscopicity, non-toxicity, antibacterial, fibrillation, film-forming properties and certain antibacterial and antitumor properties . Chitosan is widely distributed in nature and is the second largest biological resource on the earth after plant fiber. Among them, the production of marine organisms is more than 10 billion tons, which can be said to be an inexhaustible biological resource. Known as the ...

Claims

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Application Information

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IPC IPC(8): D21C9/00D21D1/02D21H11/18D21H13/30D21H15/02D21H19/14D21H19/82D21H19/84D21H21/18
CPCD21C9/004D21D1/02D21H11/18D21H13/30D21H15/02D21H19/14D21H19/82D21H19/84D21H21/18
Inventor 赵光磊张思晗李晓凤
Owner SOUTH CHINA UNIV OF TECH
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