羽毛蛋白接枝共聚物对涤/棉经纱的上浆性能

摘要

In order to impart good application properties of feather keratin sizes to high-polyester warp yarns,methyl acrylate (MA) and acrylic acid (AA) monomers at various molar ratios were simultaneously grafted onto the molecular chains of natural feather keratin under the same monomer concentration.A series of feather keratin-g-P(AA-MA) with different molecular structures were prepared and then used to size polyester/cotton 65/33 (T/C 65/35) warp yarns.Sizing properties of the feather keratins were evaluated in terms of tensile strength increasing rate,tensile elongation decreasing rate,abrasion-resistance number,and the hairiness amount of the sized yarns.The results show that sizing properties of the feather keratin to high-polyester warp yarns can be obviously improved by the introduction of appropriate amount of PMA grafted branches.Compared with the unsized T/C yarns,the yarns sized by the feather keratin-g-P(AA-MA) with good water-solubility,with molar ratio of MA/AA monomers is 20∶ 80,exhibit better properties.The tensile strength of the sized yarns is increased by 19.27％ while the tensile elongation is decreased by only 19.76％.The abrasion number of the sized yarns is about twice as high as that of the unsized yarns.In addition,the hairiness amount of the yarns sized by the grafted keratin is decreased to a large extent.%为解决羽毛蛋白浆料对高比例含涤纶纱线上浆性能不佳的问题,在单体浓度相同的情况下,通过将不同量比的丙烯酸甲酯(MA)和丙烯酸(AA)单体共同接枝到天然羽毛蛋白的分子链上,制备出一系列具有不同分子结构的羽毛蛋白-丙烯酸-丙烯酸甲酯接枝共聚物.以此系列羽毛蛋白接枝共聚物对涤/棉(65/35)经纱进行浆纱实验,测试了浆纱的增强率、减伸率、耐磨次数及毛羽数量.结果表明:适量引入聚丙烯酸甲酯(PMA)接枝支链有利于提高羽毛蛋白对高比例涤/棉纱的上浆性能;与原纱相比,当MA与AA的量比为20∶80时,合成出的羽毛蛋白接枝共聚物浆料保持了良好的水溶性,涤/棉浆纱的强度提高了19.27％,断裂伸长率仅降低了19.76％,耐磨次数达到原纱的2倍有余,毛羽数量亦大为降低.