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Method for preparing antibacterial fiber material by using bagasse

A technology of antibacterial fiber and bagasse, applied in fiber raw material processing, textile and papermaking, etc., can solve the problems of low added value and low utilization rate of bagasse

Inactive Publication Date: 2011-09-14
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at present, the utilization of bagasse is limited to fuel for boilers in sugar factories, and a very small part is used as feed filler, pulp and paper, and production of building boards, etc.
Overall, the utilization rate of bagasse is not high and the added value is low

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038]The bagasse after removing the pith was used, and after being exposed to the sun, 1 kg of bagasse was mechanically pulverized with a Bailey micronizer for 30 minutes, and the obtained bagasse fine powder was sieved, with an average diameter of 0.8 mm, and then dried at 50°C for 12 hours , moisture content 2.1%; take 100 g of bagasse powder, put it in a Soxhlet extractor for dewaxing, use toluene-ethanol (2:1, v / v) as solvent, extract at 60°C for 6 h, and then take out Bagasse was air-dried at 50°C for 16 h; 800 mL of water was added to the dewaxed bagasse, placed in a water bath at 65°C for 2 h, filtered, and the filter residue was separated to obtain de-hemicellulose-derived bagasse; Add 300 mL of 1.3% by weight sodium chlorite to the bagasse, let it stand at room temperature for 30 min, then adjust the pH to 3.5–4.0 with 10% by weight of acetic acid, and soak at 75°C for 2 h to obtain delignified bagasse; Soak the delignified bagasse in 250 mL each of 10% by weight KOH...

Embodiment 2

[0040] The bagasse after removing the pith was used, dried for 12 hours, and the moisture content was 0.3%; 1 kg of the dried bagasse was mechanically pulverized with a Bailey micro-powder machine for 30 minutes, and the bagasse fine powder was sieved, with an average diameter of 0.8 mm; the sugarcane was taken 100 g of slag powder was dewaxed in a Soxhlet extractor, methyl ethyl ketone-toluene (1:2, v / v) was used as the extraction solvent, extracted at 60°C for 6 h, and then the bagasse was taken out for 50 Blast drying at °C for 16 h; add 800 mL of water to the dewaxed bagasse, place it in a water bath at 70°C for 4 h, filter, separate and take the filter residue to obtain dehemicellulose bagasse; add 1.3 % sodium chlorite 300 mL, placed at room temperature for 30 min, then adjusted the pH to 3.5~4.0 with 10% acetic acid, and soaked at 60°C for 4 h to obtain delignified bagasse; Soak delignified bagasse in 250 mL each of KOH and 10% NaOH for 10 h, filter, wash the filter res...

Embodiment 3

[0042] The bagasse from the pith removal was air-dried at 70°C for 12 h, and the moisture content was 0.3%; 1 kg of the dried bagasse was mechanically pulverized with a Bailey micro-powder machine for 45 min, and the bagasse fine powder was sieved, with an average diameter of 0.8 mm; Take 100g of bagasse powder, put it in a Soxhlet extractor for dewaxing, use toluene-ethanol (2:1, v / v) as solvent, extract at 60°C for 6 h, then take out the bagasse, 50°C Blow dry at C for 12 h; add 800 mL of water to the dewaxed bagasse, put it in a water bath at 50°C for 1 h, filter, separate and take the filter bagasse to obtain dehemicellulosed bagasse; add 1.3% to the dehemicellulosed bagasse Sodium chlorite 300 mL, placed at room temperature for 15 min, then adjusted to pH 3.5-4.0 with 10% acetic acid, soaked at 75°C for 1 h to obtain delignified bagasse; Soak delignified bagasse in 250 mL each of KOH and 10% NaOH for 10 h, filter, wash the filter residue with distilled water and 95% ethan...

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Abstract

The invention relates to a method for preparing an antibacterial fiber material by using bagasse. The preparation method comprises the following steps of: fully drying and mechanically crushing the bagasse, removing cane wax by cable type extraction, removing hemicellulose by hot water bath, and removing lignin by using sodium chlorite and acid base to obtain separated bagasse cellulose; and adding an active reagent into the dried bagasse cellulose, stirring and activating, adding an esterification reagent into the activated bagasse cellulose system, and performing esterification reaction for 1 to 2 hours with stirring at room temperature, wherein the consumption of the esterification reagent is controlled to be 1 to 2 milliliters in each 1 gram of bagasse cellulose; and adding alcoholic alkali liquor into the reaction solution after the reaction is finished to separate out a product, washing the sediment by using 95 percent ethanol, and drying for 3 hours by blowing air at the temperature of 60 DEG C to obtain bagasse cellulose ester derivative, wherein a test proves that the average substitution degree is 0.3 to 0.6, and the crystal structure of the fibers is complete. The obtained antibacterial bagasse fibers have obvious inhibiting effect on most food putrefying bacteria and skin fungi, and can be used for food packing materials and antibacterial functional textile products.

Description

technical field [0001] The invention relates to a method for preparing an antibacterial fiber material, which converts bagasse into wood fiber material with antibacterial function through chemical treatment. The obtained products are used as raw materials for antibacterial packaging materials and for the manufacture of special paper, etc. Background technique [0002] In recent years, the conversion of agricultural waste and renewable resources to obtain new materials, high calorific value energy, chemical raw materials and medicines is becoming an important new development trend. Agricultural and chemical scientists in European countries and Japan are actively exploring the use of agricultural waste and other renewable resources as raw materials to produce new chemical products. In the plant and crop-based renewable resource utilization plan formulated by the U.S. Department of Energy, it is estimated that chemical products based on renewable plant resources will reach 10%...

Claims

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Application Information

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IPC IPC(8): C08B5/14D21C5/00C08L1/16
Inventor 王兆梅李娜郑必胜肖凯军
Owner SOUTH CHINA UNIV OF TECH
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