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The effect of hydrophobic alkyl chain length on the mechanical properties of latex particle hydrogels

机译：疏水性烷基链长度对胶乳颗粒水凝胶力学性能的影响

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摘要

Herein, different long alkyl chains (C1, C6, C12, and C16) were introduced as hydrophobic segments to enhance the performance of hydrogels reinforced by latex particles (LP-Gel). Poly(butyl acrylate) (PBA) latex particles (LPs) were employed as hydrophobic association cross-linking centers. First, the PBA latex particles were prepared via emulsion polymerization, and then, LP-Gel with high mechanical strength was prepared via one-pot free radical polymerization using acrylamide as a monomer, LP as a crosslinking center, and methacrylate as a hydrophobic molecule. It was found that the length of the hydrophobic alkyl chains from methacrylate has a significant effect on the mechanical performance and swelling degree of the hydrogels. The short alkyl chains exhibited weak hydrophobic interactions, and the resulting LP-Gel had a low mechanical strength. However, the long alkyl chains can effectively entangle with LPs through strong hydrophobic interactions, which significantly enhance the mechanical strength of the hydrogels. As a result, the LP-Gel exhibits a maximum fracture stress of 1.2 MPa and elongation of 2336%. This study will have a profound impact on the understanding of hydrogels toughened by hydrophobic alkyl chains of different lengths.
机译：在此，将不同的长烷基链（C1，C6，C12和C16）作为疏水区段引入，以增强通过胶乳颗粒增强的水凝胶的性能（LP-凝胶）。聚（丙烯酸丁酯）（PBA）胶乳颗粒（LPS）用作疏水性关联交联中心。首先，通过乳液聚合制备PBA胶乳颗粒，然后通过使用丙烯酰胺作为单体，LP作为交联中心，作为疏水分子甲基丙烯酸甲酯，通过一锅自由基聚合制备具有高机械强度的LP-凝胶。发现来自甲基丙烯酸酯的疏水性烷基链的长度对水凝胶的机械性能和溶胀度具有显着影响。短烷基链表现出弱疏水相互作用，所得的LP凝胶具有低机械强度。然而，通过强烈的疏水相互作用，长烷基链可以有效地缠绕LPS，这显着提高了水凝胶的机械强度。结果，LP-凝胶具有1.2MPa的最大断裂应力，伸长率为2336％。该研究将对通过不同长度的疏水性烷基链增韧的水凝胶的理解产生深远的影响。

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  • 来源
    《RSC Advances》 |2017年第71期|共7页
  • 作者

    Gao Yang; Duan Lijie; Guan Shuang; Gao Guanghui; Cheng Ya; Ren Xiuyan; Wang Yuanrui;

  • 作者单位

    Changchun Univ Technol Sch Chem Engn Changchun 130012 Jilin Peoples R China;

    Changchun Univ Technol Sch Chem &

    Life Sci Changchun 130012 Jilin Peoples R China;

    Changchun Univ Technol Sch Chem &

    Life Sci Changchun 130012 Jilin Peoples R China;

    Changchun Univ Technol Sch Chem Engn Changchun 130012 Jilin Peoples R China;

    Changchun Univ Technol Sch Chem Engn Changchun 130012 Jilin Peoples R China;

    Changchun Univ Technol Sch Chem Engn Changchun 130012 Jilin Peoples R China;

    Changchun Univ Technol Sch Chem Engn Changchun 130012 Jilin Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学;
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