高等学校化学学报 ›› 2022, Vol. 43 ›› Issue (11): 20220316.doi: 10.7503/cjcu20220316

• 高分子化学 • 上一篇    下一篇

液相剪切原位剥离蒙脱土纳米片增强高阻氧聚乳酸

徐欢1(), 柯律1, 唐梦珂1, 尚涵1, 徐文轩1, 张子林1, 付亚男1, 韩广东2, 崔金声2, 杨皓然3, 高杰峰4, 张生辉1, 何新建5()   

  1. 1.中国矿业大学材料与物理学院, 徐州 221116
    2.济宁浩珂科技有限公司, 济宁 272100
    3.郑州轻工业大学材料与化学工程学院, 河南省表界面科学重点实验室, 郑州 450002
    4.扬州大学化学化工学院, 扬州 225200
    5.中国矿业大学安全学院, 徐州 221116
  • 收稿日期:2022-05-09 出版日期:2022-11-10 发布日期:2022-07-21
  • 通讯作者: 徐欢,何新建 E-mail:hihuan@cumt.edu.cn;xinjian.he@cumt.edu.cn
  • 基金资助:
    国家自然科学基金(52003292);江苏省自然科学基金(BK20200661);中国博士后科学基金(2020M681763);江苏省博士后科研资助计划(2021K578C);中央高校基本科研业务费专项资金(2021QN1115)

In⁃situ Liquid Exfoliation of Montmorillonite Nanosheets in Poly(lactic acid) to Resist Oxygen Permeation

XU Huan1(), KE Lyu1, TANG Mengke1, SHANG Han1, XU Wenxuan1, ZHANG Zilin1, FU Yanan1, HAN Guangdong2, CUI Jinsheng2, YANG Haoran3, GAO Jiefeng4, ZHANG Shenghui1, HE Xinjian5()   

  1. 1.School of Materials Science and Physics,China University of Mining and Technology,Xuzhou 221116,China
    2.Jining Haoke Technology Co. ,Ltd. ,Jining 272100,China
    3.Henan Key Laboratory of Surface and Interface Science and Technology,School of Material and Chemical Engineering,Zhengzhou University of Light Industry,Zhengzhou 450002,China
    4.School of Chemistry and Chemical Engineering,Yangzhou University,Yangzhou 225200,China
    5.School of Safety Engineering,China University of Mining and Technology,Xuzhou 221116,China
  • Received:2022-05-09 Online:2022-11-10 Published:2022-07-21
  • Contact: XU Huan,HE Xinjian E-mail:hihuan@cumt.edu.cn;xinjian.he@cumt.edu.cn
  • Supported by:
    the National Natural Science Foundation of China(52003292);the Natural Science Foundation of Jiangsu Province, China(BK20200661);the China Postdoctoral Science Foundation(2020M681763);the Jiangsu Provincial Postdoctoral Research Foundation, China(2021K578C);the Fundamental Research Funds for the Central Universities, China(2021QN1115)

摘要:

提出了液相剪切剥离蒙脱土(MMT)制备寡层纳米片(MNSs)并将其原位引入PLA基体的方法, 可经简单的刮刀涂覆法(Blade coating)制备MNSs质量分数为2%, 5%和10%的PLA基纳米复合薄膜. 该技术路线赋予了MNSs在PLA基体中充分剥离(片层间距可达3.11 nm)和良好取向排列以及较强的界面相互作用. 这些结构特征使得纳米复合薄膜的结晶度和力学性能得到大幅提升, 同时显著降低了氧气渗透系数. 本文不仅提出了可规模化原位剥离二维纳米片的有效方法, 更为制备高强高阻隔全降解复合材料及其结构-性能关系研究提供了思路.

关键词: 聚乳酸, 蒙脱土纳米片, 液相剪切剥离, 结晶形态, 力学性能, 阻氧性能

Abstract:

As one of the most representative bioplastics, poly(lactic acid)(PLA) has been identified as an ecofriendly candidate for packaging medicine and food, holding distinct advantages of high strength and good biocompatibility. The application prospects, however, are largely dwarfed by the poor ductility and low resistance to gas permeation. In this work, the high-shear liquid exfoliation method was proposed to effectively transform the montmorillonite(MMT) to few-layer MMT nanosheets(MNSs), which thereby enabled in situ incorporation into the PLA matrix. Using a facile blade coating method, the fully biodegradable PLA nanocomposite films were prepared, with the MNS content ranging from 2% to 5% and 10%. The MNSs were found to be well exfoliated with a planar distance up to 3.11 nm, as accompanied by good alignment and strong interfacial adhesion within the composite films. These structural features conferred remarkable improvements in the mechanical properties and gas barrier performance for the composite films. This effort is of important significance for effective exfoliation of two-dimensional(2D) nanosheets, as well as fabrication of strong and high-barrier biodegradable nanocomposites.

Key words: Poly(lactic acid), Montmorillonite nanosheets, High-shear liquid exfoliation, Crystalline morphology, Mechanical property, Oxygen barrier performance

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