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Microbiological degumming method for mulberry fibre

A technology of mulberry fiber and degumming method, which is applied in the field of microbial degumming of mulberry fiber, can solve the problems of affecting fiber quality and quality, high fiber residual glue rate, reduced mechanical properties, etc., and achieves improved efficiency, low residual glue rate, Dealing with the effects of easing conditions

Inactive Publication Date: 2009-08-19
SICHUAN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although these methods can be used to produce mulberry fibers with certain strength, elongation, length and certain luster, they have the disadvantages of long process flow, high cost, time and energy consumption, serious equipment corrosion and environmental pollution, high labor intensity and poor conditions. Inferior disadvantages, especially in the high temperature and long-term lye treatment, some components in the mulberry gum are not easy to be degraded and removed, resulting in a high residual glue rate of the finished mulberry fiber, many hard draws, and reduced mechanical properties. Affects fiber quality and quality

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Select different mulberry samples, soak them in tap water at room temperature for 36-72 hours, select the treated samples with obvious mulberry collapse, take the turbid soaking solution and dilute it by 10 times, and apply it on yeast extract 5g, CaCl 2 2H 2 O 0.5g, sodium polypectate 10g, agar 14g, 1M NaOH 9mL, 0.2% bromothymol blue solution 12.5mL, add distilled water to 1000mL, sterilize with 0.1MPa wet pressure for 20min and pour the pectin medium plate , cultured upside down at 32-37°C for 3 days; select the culture plate with colony growth and distribution less than 300 colonies / plate, and the strains with degumming ability are selected from the culture medium with concave melting state and yellow change around the colony. The strains with strong colony growth ability and large pectin degradation ring were stored at 4°C in 3g beef extract, 10g peptone, 5g sodium chloride, 1000ml water, 20g agar, pH7.0-7.2, and sterilized at 121°C. In the broth slant medium prepa...

Embodiment 2

[0028] (1) Soaking treatment Put the mulberry bark into water with a temperature of 25°C and soak it for 0.5 days, then take it out;

[0029] (2) degumming bacteria inoculation degumming The degumming bacteria I screened and cultivated in embodiment 1 is made into a pH of 9.5 according to the ratio of 5% of the mulberry weight before soaking, and the bath ratio is the degumming liquid for the first time of 1: 20, Put into the mulberry bark after soaking then, degumming 12 hours at temperature 35 ℃, take out machinery and remove epidermis, put it into the degumming bacteria II that screening and cultivation of embodiment 1 again, press the 10% of mulberry bark weight before infiltration In the second degumming solution with a pH of 9.5 and a bath ratio of 1:20, continue degumming at a temperature of 35°C for 18 hours;

[0030] (3) Washing with water Wash the degummed mulberry fiber with hot water at 60°C, then put it into the lye with a bath ratio of 1:15 and boil for 1.5 hours, ...

Embodiment 3

[0036] (1) Soaking treatment Put the mulberry bark into water at a temperature of 30°C and soak it for 1 day, then take it out;

[0037] (2) degumming bacteria inoculation degumming The degumming bacteria I screened and cultivated in embodiment 1 is made into pH as 10 in the ratio of 10% of mulberry weight before soaking, and the bath ratio is the degumming liquid for the first time of 1: 25, Put into the mulberry bark after soaking then, degumming 18 hours at 38 ℃ of temperature, take out machinery and remove epidermis, put it into the degumming bacteria II that screening and cultivation of embodiment 1 again, press the 8% of mulberry bark weight before infiltration In the second degumming solution with a pH of 10.2 and a bath ratio of 1:25, continue degumming at a temperature of 38°C for 12 hours;

[0038] (3) Washing with water Wash the degummed mulberry fiber with hot water at 80°C, then put it into the lye with a bath ratio of 1:25 and boil for 2 hours, take it out and wa...

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Abstract

The microbial degumming method of the mulberry fiber disclosed by the invention, the method is to carry out infiltration treatment on the mulberry bark first, and then use the degumming bacteria screened and cultivated from the collected mulberry bark to inoculate the infiltrated mulberry bark for degumming, Then, the degummed fibers are sequentially washed, softened, dehydrated and dried, and finally opened, carded and packaged. Because the present invention uses microbial degumming, it not only reduces the consumption of chemicals such as strong acid and strong alkali, reduces production costs, reduces environmental pollution, and equipment corrosion, but also shortens the process flow, reduces labor intensity, and improves The efficiency is improved, the output is increased, and the fiber is separated more completely, the residual glue rate of the fiber is lower, and the ratio of doubling and stalks is reduced, which greatly improves the quality and production rate of mulberry fiber.

Description

technical field [0001] The invention belongs to the technical field of mulberry fiber preparation, and in particular relates to a microbial degumming method for mulberry fiber. Background technique [0002] my country is a big country of sericulture, with an area of ​​8 million mu of mulberry fields in the country, and the output of mulberry fiber can reach 800,000 tons per year. The research and development of natural mulberry bark fiber for textile materials can not only comprehensively utilize domestic discarded mulberry bark resources to realize waste utilization, but also increase farmers' income, which has great social and economic benefits. [0003] The preparation of mulberry fiber is through degumming of mulberry, that is, removing the pectin, hemicellulose and lignin coated on the surface of the fiber to obtain fibers with certain mechanical properties that can be used for textiles and composite materials. raw material. Existing mulberry fiber degumming method, w...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01C1/00C12N1/00
Inventor 华坚张文学郑庆康李乔兰吴莉丽刘会
Owner SICHUAN UNIV
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