高等学校化学学报 ›› 2015, Vol. 36 ›› Issue (3): 559.doi: 10.7503/cjcu20141059

• 高分子化学 • 上一篇    下一篇

聚乳酸/壳聚糖季铵盐皂石纳米复合材料的原位插层聚合及性能表征

席习1, 甄卫军1(), 卞生珍2   

  1. 1. 新疆大学石油天然气精细化工教育部(自治区)重点实验室, 乌鲁木齐 830046
    2. 新疆轻工职业技术学院, 乌鲁木齐 830021
  • 收稿日期:2014-12-01 出版日期:2015-03-10 发布日期:2015-01-30
  • 作者简介:联系人简介: 甄卫军, 男, 博士, 副教授, 主要从事聚合物基复合材料结构与性能研究. E-mail: zhenweijun6900@163.com
  • 基金资助:
    新疆大学博士基金项目(批准号: BS120110)资助

In-situ Intercalative Polymerization of Poly(lactic acid)/HTCC-saponite Nanocomposites and Their Properties Characterization

XI Xi1, ZHEN Weijun1,*(), BIAN Shenzhen2   

  1. 1. Key Laboratory of Oil and Gas Fine Chemicals, Ministry of Education and Xinjiang Uygur Autonomous Region,Xinjiang University, Urumqi 830046, China
    2. Xinjiang Institute of Light Industry Technology, Urumqi 830021, China
  • Received:2014-12-01 Online:2015-03-10 Published:2015-01-30
  • Contact: ZHEN Weijun E-mail:zhenweijun6900@163.com
  • Supported by:
    † Supported by the Xinjiang University Foundation, China(No.BS120110)

摘要:

通过两步法将2,3-环氧丙基三甲基氯化铵接枝壳聚糖合成了水溶性壳聚糖季铵盐(HTCC), 以其为插层剂对稀有的新疆皂石(Saponite)黏土矿物进行有机改性, 制备了壳聚糖季铵盐皂石(HTCC-saponite), 并以其为助剂, 以丙交酯为单体, 通过原位插层聚合法制备了聚乳酸(PLA)/HTCC-saponite纳米复合材料. 最优化合成条件: 聚合反应温度150 ℃, 辛酸亚锡加量2%(质量分数), HTCC-saponite加量1%(质量分数)、 聚合反应时间16 h. 微观结构分析表明HTCC-saponite具有插层与剥离共存的结构. 采用X射线衍射(XRD)、 透射电子显微镜(TEM)、 热重分析(TG-DTG)和差示扫描量热仪(DSC)等对PLA/HTCC-saponite纳米复合材料的微观结构、 形貌及热稳定性进行了表征和分析. 结果表明, HTCC-saponite有效改善了PLA的结晶性能, 提高PLA的热稳定性. 抗菌测试结果表明, HTCC-saponite具有良好的抗菌性, 并赋予PLA/HTCC-saponite复合材料较强的抑菌能力.

关键词: 聚乳酸, 壳聚糖季铵盐, 皂石, 原位插层聚合, 纳米复合材料

Abstract:

Water-soluble N-(2-hydroxyl)propyl-3-trimethyl ammonium chitosan chloride(HTCC) was synthesized with 2,3-epoxypropyl trimethyl ammonium chloride(GTA) grafting to the amino groups of chitosan by two-step method. Then, chitosan quaternary ammonium intercalated saponite(HTCC-saponite) was synthesized with HTCC and saponite under ultrasonication. Moreover, poly(lactic acid)(PLA)/HTCC-saponite nanocomposites were prepared by means of in-situ intercalative polymerization with HTCC-saponite and lactide. Orthogonal experiment showed the optimization polymerization parameters of PLA/HTCC-saponite were as follows: the polymerization temperature was 150 ℃, the amount of stannous caprylate was 2%(mass fraction), the amount of HTCC saponite was 1%(mass fraction) and the polymerization time was 16 h. The morphology analysis showed that the HTCC-saponite appeared with intercalative or partially exfoliated structure. The microstructure, morphology and thermal properties of PLA/HTCC-saponite nanocomposites were characterized by XRD, TEM, TG-DTG and DSC, respectively. The results showed that HTCC-saponite obviously promoted the crystallinity and thermal stability of PLA. The antibacterial results showed that HTCC-saponite had good antimicrobial properties, which was endowed in PLA/HTCC-saponite nanocomposites.

Key words: Poly(lactic acid)(PLA), Quaternized chitosan, Saponite, In-situ intercalative polymerization, Nanocomposite

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