OPTIMISING ENZYME USAGE IN PROCESSING OF COTTON YARN
收藏资源简介：
Industrial enzymology is a rapid growing field. This is explored in textile wet processing with vary novel properties and process friendly aspects. Still some drawbacks are found that， when the variations in raw materials itself at the time the reaction of enzymes are not satisfactory level to fulfill the textile requirements due to the major raw sources of manufacturing. This recipe of combinations enzyme formulated based on the individual non-cellulosic compounds and single pretreatment process. Single combination of enzyme product Comprising of enzymes in percentage as single product recipe Hydroysis enzymes of Polygalactronases 6.25， Proteases 12.5， Cellulase 25， Cellobiohydrolases 6.25， Xylanase 6.25， Lipases 6.25， Pectinase 12.5， cleavage enzyme of pectate Lyase 12.5， and oxidoreductive enzyme of glucose oxidase 12.5. In this combinations Hydrolysis enzyme contains 75 % instead of various action capable enzymes which react with specific impurities present in the cotton. Oxidoreductive enzymes 12.5% are also incorporated with this recipe including cleave enzymes. 12.5 % Oxidoreductive enzymes are added to enhance the bleaching process in simultaneously. From the formulated product 3 to 5.5 gpl concentration used for trials under controlled conditions of Goods to liquor ratio as 1:7， Treatment time 20 minutes， at 60°C of temperature. 3 gpl concentrated trial sample gives the excellent economical results in single bath pretreatment process. Characterization of samples done by the determination of Whiteness Index， water absorbency， Lea CSP and Hariness index In final result the whiteness index increased above 65.5 and should not beyond 70. Water absorbency time for all samples is reduced to<1 sec from <8 sec. CSP of materials increased as 70% and hariness index reduced as 2 from 49. Comparably， the non substrate based enzyme combination works toward to scouring and it need one more process for bleaching. But the entire substrate based enzyme combinations makes the excellent single stage pretreatment process than others.
工业酶学是一门快速发展的领域，其在纺织湿加工领域的应用展现出诸多新颖特性与工艺友好优势，但仍存在一定缺陷：由于制造所用的主要原料存在波动，酶反应效果难以达到纺织工业的应用要求。本复配酶制剂基于单一预处理工艺，以非纤维素类化合物为基础进行配方设计。该单组分酶制剂的配比如下：聚半乳糖醛酸酶（Polygalactronases）6.25%、蛋白酶（Proteases）12.5%、纤维素酶（Cellulase）25%、纤维二糖水解酶（Cellobiohydrolases）6.25%、木聚糖酶（Xylanase）6.25%、脂肪酶（Lipases）6.25%、果胶酶（Pectinase）12.5%、果胶酸裂解酶（pectate Lyase）12.5%，以及葡萄糖氧化酶（glucose oxidase）12.5%。本复配体系中水解酶占比75%，可与棉纤维中存在的特定杂质发生特异性催化作用；同时复配体系还纳入了12.5%的氧化还原酶类，其中12.5%的氧化还原酶类可同时强化漂白过程。试验采用3~5.5 gpl的配制浓度，在浴比1:7、处理时间20分钟、温度60℃的控温条件下开展。其中3 gpl浓度的试样在单浴预处理工艺中展现出优异的经济性。对试样的表征通过检测白度指数（Whiteness Index）、吸水性（water absorbency）、Lea CSP与毛羽指数（Hariness Index），最终测试结果显示：白度指数提升至65.5以上且不超过70；所有试样的吸水性时间从<8秒缩短至<1秒；材料的CSP提升70%，毛羽指数从49降至2。相较而言，非底物特异性酶复配剂仅可用于精练工序，还需额外增加漂白工序；而本研究开发的基于底物的酶复配剂可实现优于其他方案的优异单阶段预处理工艺。
