Preparation and Mechanical Properties of Oxidized Starch-Based Composites

被引：0
|
作者：
Chen S. [1 ]
Li F. [1 ]
Li J. [1 ]
Zhang C. [1 ]
Xie Q. [1 ]
Xu J. [1 ]
机构：
[1] School of Mechanical Engineering & Key Laboratory of High Efficiency and Clean Mechanical Manufacture(Ministry of Education), Shandong University, Jinan
来源：
Li, Fangyi (lifangyi@sdu.edu.cn) | 2017年 / Sichuan University卷 / 33期
关键词：
Cell structure; Crystallinity; Hydrogen bonds; Mechanical properties; Oxidized starch; Oxidized starch-based composites;
D O I：
10.16865/j.cnki.1000-7555.2017.09.030
中图分类号：
学科分类号：
摘要：
In order to improve the mechanical properties of the starch-based composites, the native starch was oxidized and the oxidized starch-based composites(OS composites)were prepared by molding foam. The mechanical test shows that the mechanical properties of OS composites are greatly improved, and the optimum oxidation ratio is m(starch):m(H2O2)=10:1.5. At this point, the tensile strength is 3.05 MPa, the compressive strength is 6.724 MPa, which is 21.03% and 14.65% higher than those of the native starch-based composites respectively. At this time, cushion performance is the best. The compressive strength of composites is better than that of EPS. And the cushion coefficient is close to EPS. In order to reveal internal mechanism on the changes of performance, the FT-IR was done. It is found that the oxidization process changes the internal functional groups of native starch and new stronger hydrogen bonds are formed. The new hydrogen bonds strengthen the connection of starch and fiber. The XRD analysis shows that the crystallinity of starch decreases after oxidization modification. The more homogeneous phase is formed and the bare branch increases. The combination with sisal fiber is better. In order to explore the interfacial bonding of the composites, the images of the composites were observed by SEM. The images shows that OS composites have a good cell structure inside. Its starch matrix is uniformly attached to the surface of sisal fiber. The combination of starch and fiber is very good. © 2017, Editorial Board of Polymer Materials Science & Engineering. All right reserved.
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页码：177 / 183
页数：6
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