• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>RSC Advances >Effects of single-modification/cross-modification of starch on the mechanical properties of new biodegradable composites
【24h】

Effects of single-modification/cross-modification of starch on the mechanical properties of new biodegradable composites

机译：淀粉单改性/交叉改性对新型可生物降解复合材料的力学性能的影响

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Starch-based composites with different modified starches were prepared by combining starches with sisal fibers to investigate the effects of single-modification/cross-modification of starch on the mechanical properties of new biodegradable composites. Mechanical test results showed that cross-modification of starch improved the toughness of the composites, whereas single-modification improved the tensile strength. The oxidized esterified starch-based composite (OESC) exhibited the best toughness, with improved elongation at break and Young's modulus by 136.1% and 54.3%, respectively, compared with a native starch-based composite. Meanwhile, the tensile strength of the esterified starch-based composite (ESC) improved by 61.6%. The hydrogen bonds, crystallinity, and micro-structure of the composites were investigated to reveal the inherent mechanism of the changes in performance. Fourier transform infrared spectroscopy showed that modification of starch changed the functional groups of starch. Thus, the ESC formed the strongest hydrogen bonds. X-ray diffraction analysis showed that the crystallinity decreased after the starches were modified. The OESC exhibited the lowest crystallinity, with a severely damaged structure. Many starch branches were combined with sisal fibers so that the composite was not easily pulled off. Scanning electron microscopy images showed that the OESC formed good cell structures internally when starch uniformly attached to the surface of the fibers.
机译：通过将淀粉与Sisal纤维组合来制备具有不同改性淀粉的淀粉基复合材料，以研究淀粉单改性/交叉改性对新可生物降解复合材料的机械性能的影响。机械测试结果表明，淀粉的交叉改性改善了复合材料的韧性，而单改性改善了拉伸强度。氧化酯化的淀粉基复合物（OESC）表现出最佳韧性，与天然淀粉基复合材料相比，分别具有136.1％和54.3％的断裂和杨氏模量的改善伸长率。同时，酯化的淀粉基复合材料（ESC）的拉伸强度提高了61.6％。研究了复合材料的氢键，结晶度和微结构，揭示了性能变化的固有机制。傅里叶变换红外光谱显示淀粉的改变改变了淀粉的官能团。因此，ESC形成了最强的氢键。 X射线衍射分析表明，在修饰淀粉后结晶度降低。 OEC表现出最低的结晶度，结构严重受损。许多淀粉分枝与剑麻纤维相结合，使得复合材料不容易被拉出。扫描电子显微镜图像显示，当淀粉均匀地附接到纤维表面时，OEC在内部形成了良好的电池结构。

著录项

  • 来源
    《RSC Advances》 |2018年第22期|共9页
  • 作者

    Chen Shuai; Li Fang-yi; Li Jian-feng; Sun Xu; Cui Jin-feng; Zhang Chuan-wei; Wang Li-ming; Xie Qi; Xu Jie;

  • 作者单位

    Shandong Univ Sch Mech Engn Key Lab High Efficiency &

    Clean Mech Mfg Minist Educ Jinan 250061 Shandong Peoples R China;

    Shandong Univ Sch Mech Engn Key Lab High Efficiency &

    Clean Mech Mfg Minist Educ Jinan 250061 Shandong Peoples R China;

    Shandong Univ Sch Mech Engn Key Lab High Efficiency &

    Clean Mech Mfg Minist Educ Jinan 250061 Shandong Peoples R China;

    Shandong Univ Sch Mech Engn Key Lab High Efficiency &

    Clean Mech Mfg Minist Educ Jinan 250061 Shandong Peoples R China;

    Shandong Univ Sch Mech Engn Key Lab High Efficiency &

    Clean Mech Mfg Minist Educ Jinan 250061 Shandong Peoples R China;

    Shandong Univ Sch Mech Engn Key Lab High Efficiency &

    Clean Mech Mfg Minist Educ Jinan 250061 Shandong Peoples R China;

    Shandong Univ Sch Mech Engn Key Lab High Efficiency &

    Clean Mech Mfg Minist Educ Jinan 250061 Shandong Peoples R China;

    Shandong Univ Sch Mech Engn Key Lab High Efficiency &

    Clean Mech Mfg Minist Educ Jinan 250061 Shandong Peoples R China;

    Shandong Univ Sch Mech Engn Key Lab High Efficiency &

    Clean Mech Mfg Minist Educ Jinan 250061 Shandong Peoples R China;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
  • 关键词

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号