Effect of Post-treatment on the Properties of Agar Fibers

Jing-jing Liu; Zhi-xin Xue; Miao Yan; Quan-yi Zhang; Yan-zhi Xia

doi:10.11777/j.issn1000-3304.2018.18029

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Effect of Post-treatment on the Properties of Agar Fibers

Research Article | 更新时间：2021-01-26

- Effect of Post-treatment on the Properties of Agar Fibers
- Acta Polymerica Sinica Vol. 0, Issue 10, Pages: 1345-1350(2018)
- 作者机构：
  
  青岛大学化学学工学院海洋纤维新材料研究院省部共建生物多糖纤维成形与生态纺织国家重点实验室　青岛 266071
- 作者简介：
- 基金信息：
- DOI：10.11777/j.issn1000-3304.2018.18029
  CLC：
- Published：2018-10，
  
  Received：24 January 2018，
  
  Revised：28 April 2018，
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Jing-jing Liu, Zhi-xin Xue, Miao Yan, Quan-yi Zhang, Yan-zhi Xia. Effect of Post-treatment on the Properties of Agar Fibers. [J]. Acta Polymerica Sinica 0(10):1345-1350(2018)
DOI：

Jing-jing Liu, Zhi-xin Xue, Miao Yan, Quan-yi Zhang, Yan-zhi Xia. Effect of Post-treatment on the Properties of Agar Fibers. [J]. Acta Polymerica Sinica 0(10):1345-1350(2018) DOI： 10.11777/j.issn1000-3304.2018.18029.

摘要

利用琼胶良好的凝胶性用湿法纺丝制备琼胶纤维，为了解决湿法纺丝制备的琼胶纤维的并丝现象，提高琼胶纤维的力学性能，用不同的试剂对琼胶纤维进行后处理，借助电镜、力学性能、接触角测试、热重分析、红外光谱等手段，研究了琼胶纤维经不同试剂处理后的结构、力学性能和热性能. 结果表明：用氨基硅油处理的琼胶纤维在表面形成一层疏水膜，无并丝现象，力学性能显著提高，接触角为106.4°，疏水性能提高；用四硼酸钠处理的琼胶纤维，并丝现象解决，但是纤维表面变得粗糙，力学性能也有所降低，接触角变小，极限氧指数增加到22%，表现出一定的阻燃性.

Abstract

In recent years

both academia and industry have focused their efforts on better utilization of natural fibers and synthetic bio-based fibers. Agar

extracted from red algae

has good biocompatibility

excellent moisturizing ability and biodegradability. Agar fibers were usually fabricated

via

wet spinning by extruding agar solution into a barium chloride coagulation bath due to the unique gel properties of agar. However

the phenomenon of " fibers bundle adhesion” and the mechanical properties of agar fibers need to be improved. In this study

we use different post-processing solutions (amino silicones and sodium tetraborate) to get excellent agar fibers. The structures

mechanical properties and thermal properties of the agar fibers ontained were evaluated by scanning electron microscopy (SEM)

single fiber tensile strength tester

contact angle tester

thermogravimetric tester

and Fourier transform infrared spectroscopy (FTIR). The results show that the phenomenon of " fibers bundle adhesion” disappeared whether agar fibers were immersed in amino silicones or sodium tetraborate. Agar fibers immersed in amino silicones form a hydrophobic film on the surface

therefore

the contact angle increased to 106.4°. The linear intensity increased to 0.69 cN/dtex and the elongation at break increased to 104.89% when the agar fibers were immersed in amino silicones. The contact angle decreased to 68.3° while the agar fibers were immersed in sodium tetraborate because their surface became rough and the mechanical strength decreased. However

the agar fibers immersed in sodium tetraborate showed a certain degree of flame retardancy. The results of limit oxygen index (LOI) indicate that the agar fibers immersed in sodium tetraborate were combustible while the agar fibers were flammable by thermogravimetric test. The change of chemical structure of the agar fibers by different post-processing was analyzed by FTIR. Owing to excellent biological properties and outstanding moisturizing capacity

it still requires further study to accelerate the development of these agar products.

关键词

琼胶纤维表面改性氨基硅油四硼酸钠

Keywords

Agar fibersSurface modificationAmino siliconesSodium tetraborate

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State Key Laboratory of Materials-Oriented Chemical Engineering, College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University

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College of Applied Chemistry and Engineering, University of Science and Technology of China

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