纺织学报 ›› 2020, Vol. 41 ›› Issue (06): 76-80.doi: 10.13475/j.fzxb.20190904705

• 染整与化学品 • 上一篇    下一篇

己酸酯淀粉的制备及其上浆性能

李伟1(), 景元炜1, 张正桥1, 倪庆清2, 徐珍珍1, 刘新华1   

  1. 1.安徽工程大学 纺织服装学院, 安徽 芜湖 241000
    2.信州大学 纤维学部, 日本 长野 3868576
  • 收稿日期:2019-09-17 修回日期:2020-02-28 出版日期:2020-06-15 发布日期:2020-06-28
  • 作者简介:李伟(1986—),男,副教授,博士。主要研究方向为纺织浆料的开发与研究。E-mail:fangzhiliweiwu@sina.com
  • 基金资助:
    安徽省自然科学基金面上项目(1908085ME124);安徽省重点研发计划项目(201904a06020001);芜湖市科技计划项目(2018pt04)

Preparation and sizing properties of caproylated starch

LI Wei1(), JING Yuanwei1, ZHANG Zhengqiao1, NI Qingqing2, XU Zhenzhen1, LIU Xinhua1   

  1. 1. College of Textiles and Garments, Anhui Polytechnic University, Wuhu, Anhui 241000, China
    2. Faculty of Textile Science and Technology, Shinshu University, Nagano 3868567, Japan
  • Received:2019-09-17 Revised:2020-02-28 Online:2020-06-15 Published:2020-06-28

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摘要：

为开发适合疏水性纤维特别是聚乳酸纤维经纱上浆的变性淀粉浆料品种,以己酸酐(CA)为酯化剂,通过改变其用量制备了不同取代度的己酸酯淀粉(CS)。对CS颗粒结构进行了红外光谱分析,探究了己酸酯化变性对淀粉浆液性能、浆膜力学性能的影响。结果表明:经己酸酯化变性后,淀粉浆液的黏度热稳定性、淀粉对聚乳酸和涤纶纤维的黏附性及淀粉膜的断裂伸长率均得到了提升,膜的断裂强度有所降低;CS对2种纤维的黏附力,在取代度小于0.025时逐渐提高,且在0.025时取得最大值,然后随取代度增加而有所降低;CS膜的断裂伸长率随取代度增大而提高,断裂强度逐渐降低;CS浆液的黏度热稳定性逐渐降低,但均高于酸解淀粉。

关键词: 淀粉, 浆料, 己酸酯化, 黏附性, 浆膜性能, 上浆性能

Abstract:

In order to provide a suitable modified starch for warp sizing of hydrophobic fibers especially for polylactic acid (PLA) fibers, caproylated starch (CS) samples with different degrees of substitution were prepared by using caproic anhydride as esterifying agent. The structure of CS was characterized by Fourier transform infrared analysis. The influence of the caproylation on paste and film properties was investigated. The results show that the caproylation could enhance viscosity stability of gelatinized starch paste, its adhesion to polylactic acid and polyester fibers, and breaking elongation of starch film. In addition, the modification causes decrease in tensile strength of starch film. When the degrees of substitution are below 0.025, the adhesion demonstrats a gradual increase, and it reaches the highest value at 0.025 and then gradually decreases. The elongation of CS film rose gradually but the strength reduced. The stabilities of the CS pastes are worsened as the degree of substitution is increased, but are higher than that of acid-converted corn starch paste.

Key words: starch, sizing agent, caproylation, adhesion, film property, sizing property

中图分类号: 

  • TS103.846

图1

淀粉己酸酯化合成CS的反应方程"

图2

ACS和CS的红外光谱曲线"

图3

CS样品的扫描电镜照片(×2 000)"

图4

CS浆液的黏度及黏度热稳定性"

图5

己酸酯化变性对淀粉黏附性的影响"

图6

己酸酯化变性对淀粉浆表面张力的影响"

图7

己酸酯化变性对淀粉浆膜力学性能的影响"

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