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林产化学与工业

林产化学与工业 ›› 2017, Vol. 37 ›› Issue (5): 119-125.doi: 10.3969/j.issn.0253-2417.2017.05.016

• 研究报告 • 上一篇    下一篇

酯化淀粉改性木薯渣纤维/PBS复合材料性能研究

岳小鹏1,2, 刘鹏杰1,2,3, 雷丹1   

  1. 1. 陕西科技大学 轻工科学与工程学院;陕西省造纸技术及特种纸品开发重点实验室, 陕西 西安 710021;
    2. 轻化工程国家级实验教学示范中心, 陕西科技大学, 陕西 西安 710021;
    3. 陕西科技大学 机电工程学院, 陕西 西安 710021
  • 收稿日期:2017-02-26 出版日期:2017-10-25 发布日期:2017-10-30
  • 作者简介:岳小鹏(1982-),男,山东青岛人,讲师,博士,硕士生导师,主要从事生物质复合材料的研究;E-mail:yuexiaopeng@sust.edu.cn。
  • 基金资助:
    国家自然科学基金资助项目（51603118）

Properties of Cassava Dregs Fiber/PBS Composites Modified by Starch Ester

YUE Xiaopeng1,2, LIU Pengjie1,2,3, LEI Dan1   

  1. 1. Shaanxi Province Key Laboratory of Papermaking Technology and Specialty Paper, College of Bioresources Chemicals and Materials Engineering, Shaanxi University of Science and Technology, Xi'an 710021, China;
    2. National Demonstration Center for Experimental Light Chemistry Engineering Education, Shaanxi University of Science and Technology, Xi'an 710021, China;
    3. College of Mechanical & Electrical Engineering, Shaanxi University of Science and Technology, Xi'an 710021, China
  • Received:2017-02-26 Online:2017-10-25 Published:2017-10-30

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摘要： 以辛酰氯作酯化试剂，制备得到酯化淀粉（SE），并将SE作为界面改性剂应用于木薯渣纤维/聚丁二酸丁二醇酯（PBS）复合材料的合成。在n（-COCl）：n（-OH）为2：1的条件下，取代度（DS）2.13的SE与水的接触角达87.9°，相比未处理淀粉，酯化淀粉的疏水性显著提高。SE用量（以木薯渣纤维质量计）5.0%时，表面处理过的木薯渣纤维/PBS复合材料的拉伸强度12.57 MPa、弯曲强度67.53 MPa和冲击强度4.89 kJ/m2，比未处理纤维制备的复合材料分别提高了52.7%、24.0%和30.4%。SEM分析表明，SE处理过的纤维与基体之间表现出更好的相容性。初步推测SE增强复合材料界面结合的机理为：两亲性的酯化淀粉，其疏水端与PBS基体表面活性相近，易产生良好的相容性；而其亲水端易与木薯渣纤维上的羟基通过氢键结合，从而增强了复合材料的界面结合。

关键词: 聚丁二酸丁二醇酯, 木薯渣纤维, 复合材料, 酯化淀粉, 界面改性

Abstract: Starch ester(SE) was prepared by using octanoyl chloride as esterification reagent. SE was further used as interfacial modifier in poly(butylene succinate)(PBS)/cassava dregs fiber composites. The contact angle of SE(synthesized by octanoyl chloride, n(-COCl)/n(-OH)=2:1; the degree of substitution(DS) 2.13) was determined to 87.9°, and the hydrophobicity of SE was enhanced as compared to the original starch. The bending, tensile and impact strengths of composites modified with 5% SE were 12.57 MPa, 67.53 MPa and 4.89 kJ/m2, respectively. Compared with those of the specimen without any treatment, the tensile, bending and impact strengths were increased by 52.7%, 24.0% and 30.4%, respectively. Furthermore, the improved compatibility between treated fibers and matrix was verified by SEM images. In addition, the mechanism of starch ester as macromolecule interfacial modifier to enhance the interfacial bonding of composites was speculated. The starch ester was amphiphilic property, one end of which is hydrophobic and PBS matrix was combined with the similar surface activity. One end of the hydrophilic and the hydroxyl groups of cassava dregs fiber were bonded by hydrogen bonds. The starch ester played a bridge role between PBS matrix and cassava dregs fiber, resulting in enhancing the interfacial bonding strength of composites.

Key words: PBS, cassava dregs fiber, composites, starch ester, interfacial modification

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