乙酰乙酸酯化淀粉浆料的制备及其性能

doi:10.13475/j.fzxb.20170300405

摘要/Abstract

摘要：

为弥补天然淀粉浆料的性能不足，通过改变双烯酮对酸解淀粉(ATS)的重量比，制备一系列不同取代度的乙酰乙酸酯化淀粉（AAS）。研究了AAS的浆液黏度、浆膜力学性能、黏附性能和浆纱性能。结果表明：乙酰乙酸酯化变性能增强淀粉的浆膜力学性能和对纤维的黏附性能。当取代度在0.014 - 0.085范围内，随着变性程度的增加，AAS的浆膜断裂伸长率和对纤维的黏附性表现出先增大后减小的变化规律，而浆膜断裂强度则表现出先减小后增大的变化规律。当取代度为0.056时，浆膜断裂伸长率达到最大值3.88%，对涤纶纤维、棉纤维的黏附力分别达到最大值137.54 N和69.32 N；AAS作为浆料时，取代度以0.028 - 0.071为宜；AAS比ATS更能提高对13 tex 涤/棉（ 65/35）经纱的浆纱性能。

关键词: 乙酰乙酸酯化淀粉, 浆料, 取代度, 浆膜, 黏附性能

Abstract:

In order to make up for the lack of natural starch used as sizing agent in properties, a series of acetoacetylated starches (AASs) with different degree of substitution were prepared by changing the weight ratio of diketene to acid-thinned starch (ATS). The viscosity of sizing liquor, mechanical properties of sizing film, adhesion properties and sizing properties of AAS were studied. The results showed that esterifying modification of acetoacetate is capable of enhancing the mechanical properties of starch sizing film, enhancing the adhesion to fibers. When the degree of substitution is in a range of 0.014 - 0.085, with the increase in the degree of modification, the breaking elongation of AAS film and the adhesion to fibers first increase and then reduce, the tensile strength of AAS film first reduces and then increases. When the degree of substitution is 0.056, the breaking elongation of AAS film reaches the maximum value of 3.88%, the adhesion to polyester fibers and cotton fibers reaches the maximum value of 137.54 N and 69.32 N respectively. The suitable degree of substitution is 0.028-0.071 when AAS is used as sizing agent. Compared with ATS, AAS can further enhance the sizing properties of 13 tex polyyester/cotton ( 65/35) warp yarn.

Key words: acetoacetylated starch, size liquor, substitution degree, sizing film, adhesion property

张朝辉徐珍珍刘新华李伟. 乙酰乙酸酯化淀粉浆料的制备及其性能[J]. 纺织学报, 2017, 38(11): 68-72.

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