共查询到18条相似文献,搜索用时 93 毫秒
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缫丝废液提取丝胶蛋白质
目前缫丝厂每生产1吨白厂丝和相关副产品加工约需要用700吨水,所排放的废水中溶解性污染物以丝胶蛋白质为主,其COD的贡献率在80%以上。 相似文献
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应用丝胶蛋白化学理论,分析探讨劣质茧解舒不良原因及其变性机理,认为茧、丝结构的多种不均一性和差异,都能造成蚕茧的解舒不良。解决办法除主要提供优质高产的蚕种,以及改进茧?温湿度和收烘茧处理外,通过实验证明,采用触蒸处理及相应的煮茧工艺,可使劣质茧解舒明显提高。 相似文献
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丝胶蛋白质离子交换回收方法的研究 总被引:1,自引:1,他引:0
介绍了一种用阴离子交换纤维来回收丝胶蛋白质的方法.蚕丝精练一般是在碱性条件下进行,精练处理后丝胶蛋白带有负电荷,与阴离子交换纤维上的正电荷之间有静电吸引力作用,被吸附到阴离子交换纤维上;当用酸浸泡时,丝胶蛋白上的负电荷被中和或转变成正电荷,与阴离子交换纤维之间的静电引力作用消失或产生静电斥力,而从阴离子交换纤维上解析.研究了丝胶蛋白质对阴离子交换纤维的吸附性能以及从阴离子交换纤维上解析丝胶蛋白质的最佳条件. 相似文献
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以废蚕茧为原料,通过高温煮茧得到丝胶蛋白溶液,测定丝胶蛋白溶液的乳化活性、乳化稳定性等指标,结果表明:丝胶蛋白的乳化性能较好。探讨了影响丝胶蛋白乳化性能的因素。乳化性受蛋白质浓度、pH值、离子强度、温度等因素影响较大,具体表现为乳化性能随着蛋白质浓度的增加逐步增大;随pH值的增加先逐渐减小,然后又逐渐增加,在pH值为4时,乳化活性和乳化稳定性达到最小值;乳化活性和乳化稳定性在20℃和50℃之间是随温度的升高而增加,50℃以上随温度的升高而减小;且其受离子浓度影响也是先增后减,在离子浓度为0.6 mol/L时乳化性能最好。 相似文献
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ANTIOXIDANT ACTIVITIES OF SILK SERICIN FROM SILKWORM BOMBYX MORI 总被引:2,自引:0,他引:2
JIN-BO FAN LI-PING WU LI-SHUI CHEN XUE-YING MAO FA-ZHENG REN 《Journal of Food Biochemistry》2009,33(1):74-88
This study was conducted to investigate the free-radical-scavenging activity and antioxidant activity of silk sericin. Silk sericin was prepared from silkworm Bombyx mori and its ability to scavenge hydroxyl, superoxide and 1,1-diphenyl-2-picrylhydrazyl (DPPH) radicals was determined by Electron Spin Resonance (ESR) and ultraviolet spectrophotometry, respectively. The antioxidant activities of the silk sericin, including lipid peroxidation in the linoleic acid system, reducing power and ferrous-ion-chelating ability, were evaluated. The results showed that silk sericin had a strong scavenging capacity for hydroxyl, superoxide and DPPH radicals. The results also showed that silk sericin had potent antioxidative activity on the peroxidation of linoleic acid. The reducing power and ferrous-ion-chelating ability of silk sericin were significant. These results indicated that silk sericin from silkworm B. mori was a natural antioxidant with potent antioxidative activity.
Most of silk sericin must be removed during raw silk production at the reeling mill and other stages of silk processing. At present, silk sericin is mostly discarded in silk processing waste water. If silk sericin is recovered and recycled, it can represent a significant economic and social benefit. Silk sericin is a natural macromolecular protein derived from the silkworm Bombyx mori . Silk sericin is useful because of its antioxidant activity. Silk sericin can be cross linked, copolymerized and blended with other macromolecular materials, especially artificial polymers, to produce materials with improved properties. The protein is also used as an improving reagent or a coating material for natural and artificial fibers, fabrics and articles. The materials modified with silk sericin and sericin composites are useful as degradable biomaterials, biomedical materials and functional membranes. 相似文献
PRACTICAL APPLICATIONS
Most of silk sericin must be removed during raw silk production at the reeling mill and other stages of silk processing. At present, silk sericin is mostly discarded in silk processing waste water. If silk sericin is recovered and recycled, it can represent a significant economic and social benefit. Silk sericin is a natural macromolecular protein derived from the silkworm Bombyx mori . Silk sericin is useful because of its antioxidant activity. Silk sericin can be cross linked, copolymerized and blended with other macromolecular materials, especially artificial polymers, to produce materials with improved properties. The protein is also used as an improving reagent or a coating material for natural and artificial fibers, fabrics and articles. The materials modified with silk sericin and sericin composites are useful as degradable biomaterials, biomedical materials and functional membranes. 相似文献
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为提高聚丁二酸丁二醇酯(PBS)纤维的服用舒适性,将PBS与天然高分子丝胶蛋白共混,经熔融纺丝制成PBS/丝胶蛋白共混纤维,研究了丝胶蛋白质量分数对纤维形态结构、化学结构、热性能、力学性能与降解性能的影响。结果表明:共混纤维具有丝胶蛋白为分散相,PBS为连续相的形态结构;丝胶蛋白的存在改善了PBS纤维断裂伸长率过高的问题,当其质量分数达到15%时,共混纤维的断裂伸长率为8.9%;共混纤维的饱和回潮率为3.90%,接近于合成纤维中的锦纶,说明共混纤维亲肤性能优良;此外,土埋降解实验6周后共混纤维的质量损失率可达53.6%,具有快速降解的能力。 相似文献
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Silk is a kind of natural fiber with good luster strength elasticity dyeability hygroscopicity and other advantages. Silk products are quite popular to the customers because of their excellent performance such as heat preservation air permeability and so on which make them comfortable to use. Silk floss which is made from pupa lining secondary cocoon etc. can be used as floc and filler materials and is an important part of silk products. According to its production mode silk floss can be divided into manual silk floss and machine-made silk floss and the latter has become the main processing mode of silk floss production due to its high production efficiency. In terms of composition silk flossing generally contains 20% - 30% sericin pupa oil and impurities so in the degumming process in addition to adding sodium carbonate and other degumming agents to remove sericin a large amount of hydrogen peroxide with strong oxidation property is also used to increase the cleanliness and smoothness. Unfortunately hydrogen peroxide is highly flammable and explosive and poses a risk in transportation and storage causing potential safety hazards to the silk processing industry. In order to solve this problem we innovatively propose two hydrogen peroxide-free processing methods of machine-made silk floss by using sodium percarbonate degumming or sodium carbonate-ozone. As an environmentally friendly solid oxidant sodium percarbonate can produce hydrogen peroxide and sodium carbonate after decomposition and is often used to degrade organic harmful substances. Similarly ozone is a common strong oxidant with broad-spectrum antibacterial properties and because ozone can be produced instantly by ozone generators there is no risk of transport and storage. Silk is composed of silk fibroin and sericin. Among them silk fibroin is fibrous protein which will swell in hot water while sericin is globular protein which is easy to dissolve in hot water. As a result in this paper heated sodium percarbonate solution and sodium carbonate-ozone system were used to deglue silk floss. The methods were as follows silk floss was degummed three times in boiling 0. 78 g / L sodium percarbonate solution for 30 minutes each time or was degummed three times in boiled 0. 5 g / L Na2 CO3 solution with ozone continuously flow at a rate of 100 mg / L - h for 30 minutes each time. After cleaning and drying the degummed silk floss can be obtained. After the experiment the apparent morphology sericin residual efficiency impurity rate compression resilience whiteness and other silk floss quality indexes of the two methods were analyzed and compared with superior machine-made silk floss processed by commercial way with hydrogen peroxide. The results show that both two processing methods got uniform degumming effect of silk floss and the surface of the single fiber was smooth and the degumming effect was basically the same as that of commercial products prepared with hydrogen peroxide. The sericin residual rate of silk floss was between 3% - 4% which was in line with the requirements of less than 5% of superior silk floss. There was no significant difference between silk floss obtained and commercial superior products in smoothness and whiteness. In conclusion the performance of silk floss in all aspects has reached the standard of superior products that is the sericin content is not more than 5% the impurity content is not more than 0. 1% the compression rate is not less than 45% and the response rate is not less than 92% . Based on the experimental results and analysis it can be concluded that the machine-made silk floss with good performance can be prepared without hydrogen peroxide showing the feasibility of processing machine-made silk floss without hydrogen peroxide which is of great significance to the research and development of a safe and reliable oxidant system for the removal of impurities in silk floss and to further improve the safety of machine-made silk floss production process. © 2022 China Silk Association. All rights reserved. 相似文献
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Tipawan Thongsook Waree Tiyaboonchai 《International Journal of Food Science & Technology》2011,46(10):2052-2061
Sericin, a water‐soluble globular protein derived from silk industry wastewater, was investigated for food industrial applications. The results proved that sericin retarded polyphenol oxidase (PPO) activity. However, the degree of inhibition varied depending on the enzyme origins, the types of substrate, sericin content and sericin molecular size. Using catechol as a substrate, under the conditions studied, sericin lowered purified mushroom PPO and apple extract PPO activity by 40% and mango extract PPO by 75%. Kinetic studies on purified mushroom PPO indicated that the type of inhibition of sericin was dependent on the substrates used. Inhibitory effects of sericin increased as the sericin content increased. The reduction in sericin molecular size by enzymatic hydrolysis produced sericin hydrolysate with ability to decrease PPO activity approximately three times greater than that of sericin. Fresh‐cut Red Delicious apples coated with sericin showed significant reduction in weight loss and improvement in the colour and texture. 相似文献
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Rungsinee Sothornvit & Rungsima Chollakup 《International Journal of Food Science & Technology》2009,44(7):1395-1400
Sericin is a natural silk protein which is removed from silk in a process called degumming. Thus, finding a use for the extracted sericin as a biopolymer film will create added value which will benefit both the economy and society. It was found that extracted sericin could not form stand-alone films. Therefore, glucomannan was incorporated with or without glycerol to form a flexible film. Sericin and glucomannan ratio (S:G) affected film properties. Increasing sericin content (S:G = 2:1) slightly reduced film water vapour permeability (WVP) without adding glycerol (Gly). This indicated that sericin provided film flexibility without increasing film WVP. As expected, increasing glycerol content increased film WVP as well as decreased tensile strength and elastic modulus but increased dramatically % elongation. It is interesting that adding beeswax to form a composite film did not improve film water vapour barrier. Thus, sericin-based film properties are dependent on components used to form film and can tailor to form the desired film flexibility and minimise permeability of films for application. 相似文献
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常规触蒸对茧包中、边部位茧的丝胶溶失率及其生丝机械性能的影响 总被引:1,自引:1,他引:0
通过对常规蒸茧包中间与靠边部位茧的茧层丝胶溶失率及其制得生丝的强伸力、黑板卷绕过程中丝条张力的测试,并对产生原因进行了探究,初步揭示了常规触蒸对茧包中间与靠连部位茧的丝胶溶失率及其生丝机械性能的影响,为进一步改善触蒸设备及工艺提供了依据。 相似文献
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采用硝酸银处理蚕丝,使银离子通过与蚕丝分子的配位结合附着于纤维,减少丝胶溶失,达到保持蚕丝重量和起到抗菌功效的目的。本文探讨分析了硝酸银、硝酸、醋酸、硝酸铵的使用,以及固着液浴比、处理时间、预浸时间等诸多因素对蚕丝丝胶的溶失影响。结果表明,银离子附着于蚕丝纤维后,能减少丝胶的溶失,对蚕丝起间接增重作用。在银离子固着液中,使用硝酸的效果比醋酸好,加入硝酸铵能明显提高丝胶固着,大大减少丝胶溶失;对蚕丝的预浸时间和固着时间不宜过长,固着液浴比以小浴比为宜。 相似文献