Key Laboratory of Science and Technology of Eco-Textiles, Ministry of Education, Donghua University, Shanghai, China, 200051.
Environ Sci Pollut Res Int. 2013 Sep;20(9):6085-95. doi: 10.1007/s11356-013-1601-5. Epub 2013 Mar 28.
An environmentally friendly and inexpensive substitute to the widely used poly(vinyl alcohol) (PVA) has been developed from soy proteins for textile warp sizing. Textile processing is the major source of industrial water pollution across the world, and sizing and desizing operations account for nearly 30 % of the water consumed in a textile plant. PVA is one of the most common sizing agents used for synthetic fibers and their blends due to PVA's easy water solubility and ability to provide desired sizing performance. However, PVA does not degrade and is a major contributor to pollution in textile effluent treatment plants. Although considerable efforts have been made to replace PVA with biodegradable sizing materials, the performance properties provided by PVA on synthetic fibers and their blends have been unmatched so far. Soy proteins are inexpensive, biodegradable, and have been widely studied for potential use in food packaging, as resins and adhesives. In this research, the potential of using soy proteins as textile sizing agents to replace PVA was studied. Polyester and polyester/cotton rovings, yarns, and fabrics sized with soy protein showed a considerably better improvement in strength and abrasion resistance compared to commercially available PVA-based size. Soy protein size had a 5-day biochemical oxygen demand /chemical oxygen demand ratio of 0.57 compared to 0.01 for PVA indicating that soy protein sizes were easily biodegradable in activated sludge. The total and ammonia nitrogen released from the proteins also did not adversely impact the biodegradability. Good sizing performance and easy biodegradability demonstrate that soy protein-based sizes have potential to replace PVA-based sizes leading to substantial benefits to the textile industry and the environment.
一种环保且廉价的聚（聚乙烯醇）（PVA）替代品已被开发出来，用于纺织品经纱上浆。纺织加工是全球工业水污染的主要来源，上浆和退浆操作占纺织厂耗水量的近 30%。由于 PVA 易溶于水且能提供所需的上浆性能，因此它是合成纤维及其混纺最常用的上浆剂之一。然而，PVA 不会降解，是纺织废水处理厂污染的主要贡献者。尽管人们已经做出了相当大的努力来用可生物降解的上浆材料替代 PVA，但迄今为止，PVA 在合成纤维及其混纺物上提供的性能还无法被超越。大豆蛋白价格低廉、可生物降解，已被广泛研究用于食品包装、树脂和粘合剂。在这项研究中，研究了将大豆蛋白用作纺织上浆剂以替代 PVA 的潜力。与市售的基于 PVA 的浆料相比，用大豆蛋白上浆的聚酯和涤棉粗纱、纱线和织物的强度和耐磨性有了显著提高。大豆蛋白浆料的生化需氧量/化学需氧量比为 0.57，而 PVA 为 0.01，这表明大豆蛋白浆料在活性污泥中很容易生物降解。从蛋白质中释放出的总氮和氨氮也没有对生物降解性产生不利影响。良好的上浆性能和易于生物降解性表明，基于大豆蛋白的浆料具有替代基于 PVA 的浆料的潜力，这将为纺织业和环境带来巨大的好处。
