Abstract

Cotton microdust (CMD) is an abundantly generated waste from textile industry with no commercial value. It is composed of cellulose as the predominant component along with other non-cellulosic components like lignin. The conversion of CMD to value-added materials would further improve the economics of the cotton mills. In this study, the CMD was converted into high value cellulose membrane through thermo-chemical pretreatment and spin coating methods. The thermal pretreated CMD was solubilized in 68 wt% zinc chloride solution prior to preparation of membrane and then the solubilized cellulose was spread on a plate and spin coated with 22% (w/v) sodium chloride. During the spin coating process, the cellulose membrane was formed with the simultaneous separation of lignin. The present method is a novel approach since a separate process for lignin removal from cotton wastes is not required to produce cellulose membrane. The XRD and FTIR analyses showed significant changes in the crystallinity and the composition of the cellulose membrane. The SEM picture of the membrane revealed uniform surface morphology. Moreover, the membrane was associated with good mechanical properties as indicated by rheology and tensile studies. The cellulose membrane had antibacterial activity against E. coli and efficient absorption and release of antibiotics. Therefore, the results would be useful for further development of a process for the production of cellulose membrane as a high value byproduct from the CMD in cotton mills.

Graphic Abstract

Development of simple and green process for the valorization of cotton microdust waste from spinning mills into Zn loaded cellulose membrane

中文翻译：

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棉花微尘废料中负载锌的纤维素膜的制备，表征及其抗菌性能-一种有价值的方法

摘要

棉花微尘（CMD）是纺织业大量产生的废物，没有商业价值。它由纤维素作为主要成分以及其他非纤维素成分（如木质素）组成。将CMD转换为增值材料将进一步改善棉纺厂的经济性。在这项研究中，CMD通过热化学预处理和旋涂方法转化为高价值的纤维素膜。在制备膜之前，将热预处理的CMD溶解在68 wt％的氯化锌溶液中，然后将溶解的纤维素铺在板上并旋涂22％（w / v）的氯化钠。在旋涂过程中，形成了纤维素膜，同时分离了木质素。本发明的方法是一种新颖的方法，因为不需要单独的方法从棉花废料中除去木质素即可生产纤维素膜。XRD和FTIR分析表明，纤维素膜的结晶度和组成发生了显着变化。膜的SEM照片显示出均匀的表面形态。此外，如流变学和拉伸研究表明，该膜具有良好的机械性能。纤维素膜对 流变和拉伸研究表明，该膜具有良好的机械性能。纤维素膜对 流变和拉伸研究表明，该膜具有良好的机械性能。纤维素膜对Ë。大肠菌并有效吸收和释放抗生素。因此，该结果对于进一步开发生产纤维素膜的方法是有用的，所述纤维素膜是棉纺织厂中CMD的高价值副产物。

图形摘要

开发一种简单而绿色的方法，将纺纱厂的棉花微尘废物增值为负载锌的纤维素膜