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Preparation of Silver-Containing B.mori Silk Fibers and Their Structure and Properties

Author: ZhaoWeiTao
Tutor: ChenYuYue
School: Suzhou University
Course: Textile Engineering
Keywords: Mulberry silk fiber Silver ions Tannic acid Structural performance Antibacterial
CLC: TS141
Type: Master's thesis
Year: 2007
Downloads: 102
Quote: 1
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Abstract


Silk fiber is a natural the green protein fiber , fibroin amino acid glycine with certain natural health , but with the improvement of living standards , environmental pollution aggravating people on various taking fiber health functions increasingly high demand for silk products antibacterial treatment will be increasingly important . The papers using tannic acid pretreatment complexation of silver ions treated silk fibers , tannic acid-treated silk fibers the better technology , and the impact of various factors on the silk fiber complexing silver ions ability . The research results show that the better technology of tannic acid-treated silk fibers : pH 3 , a temperature of 70 ° C , the reaction time was 40min Preparation of the samples of the different rate of weight gain by adjusting the TA concentration . The pH value of the treatment liquid of the silver ions and fiber weight gain rate of the tannic acid is more significant impact on the ability of the silver ions of the silk fiber-entangled . Fiber secondary growth rate reaches a maximum ( about 20% ) at pH 8 , and with the fiber tannic acid increase in weight gain rate increases . The paper also studied by means of SEM, FTIR, XRD, TG microscopic morphology and aggregation structure changes in the silk fiber treated . Studied by ICP-AES and XPS two test means a combination of silk fibers on silver ion adsorption between bacteriostatic the delineation Act and oscillation the flask quantitative method to test the processing of silk products antibacterial properties. In addition, the silk fiber mechanical properties test . The results indicate that the internal conformation of the silk fibers in the silver ion treatment β trend , the degree of crystallinity is reduced , little change in thermal stability , decreased fracture strength , elongation and initial modulus change . Tannic acid pretreated yarn fibers in the alkaline environment easier adsorption of elemental silver , the silver element is adsorbed mainly in the ionic form and between the fibers by coordination bonds binding the treated silk products have good antibacterial and durability .

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CLC: > Industrial Technology > Light industry,handicrafts > Textile industry,dyeing and finishing industry > Silk textile > Basic science
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