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Effect of size of latex particles on the mechanical properties of hydrogels reinforced by latex particles

机译：乳胶颗粒尺寸对乳胶颗粒加固水凝胶机械性能的影响

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摘要

Herein, cationic latex particles (CL) of different particle sizes were introduced as a cross-linking center to enhance the mechanical properties of the hydrophobically-associated hydrogels (P(AAm-co-HMA)-CL). Firstly, cationic polymethylmethacrylate (PMMA) latex particles were synthesized via soap-free emulsion polymerization. Subsequently, P(AAm-co-HMA)-CL hydrogels with outstanding mechanical properties were prepared using acrylamide as the monomer, hexadecyl methacrylate as the hydrophobic molecule, and CL as the cross-linking center. The size of CL had a significant effect on the mechanical properties and self-recovery properties of the P(AAm-co-HMA)-CL hydrogels. The hydrogel with larger CL size exhibited low mechanical properties due to weak hydrophobic interactions. In contrast, the hydrogel with small CL size displayed excellent mechanical properties due to an effective entanglement of the hydrophobic chains with the smaller size CL, which significantly affects the mechanical properties of the hydrogel. As a result, the maximum fracture stress and fracture strain of the hydrogel were up to 1.47 MPa and 2847%, respectively. This study can have a profound impact on the development of the technology of toughening hydrogels with latex particles.
机译：这里，将不同颗粒尺寸的阳离子胶乳颗粒（Cl）作为交联中心引入，以增强疏水相关水凝胶的机械性能（P（AAM-Co-HMA）-Cl）。首先，通过无皂乳液聚合合成阳离子聚甲基丙烯酸甲酯（PMMA）胶乳颗粒。随后，使用丙烯酰胺作为单体，十六烷基甲基丙烯酸丙烯酸酯作为疏水分子，以及CL作为交联中心的丙烯酰胺制备具有突出机械性能的P（AAM-Co-HMA）-CL水凝胶。 CL的尺寸对P（AAM-Co-HMA）-Cl水凝胶的机械性能和自回收性质具有显着影响。由于疏水性较弱的相互作用，具有较大CL尺寸的水凝胶表现出低的机械性能。相反，由于具有较小尺寸Cl的疏水链的有效缠结，具有小Cl尺寸的水凝胶显示出优异的机械性能，这显着影响了水凝胶的机械性能。结果，水凝胶的最大断裂应力和断裂应变分别为1.47MPa和2847％。本研究可以对乳胶颗粒的增韧水凝胶技术的发展产生深远的影响。

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  • 来源
    《RSC Advances》 |2019年第26期|共7页
  • 作者

    Liu Li; Lv Guangchao; Ren Xiuyan; Li Xinhe; Wang Te; Dong Jingwen; Wang Zeyu; Wu Guangfeng;

  • 作者单位

    Changchun Univ Technol Engn Res Ctr Synthet Resin &

    Special Fiber Minist Educ Changchun Jilin Peoples R China;

    Changchun Univ Technol Engn Res Ctr Synthet Resin &

    Special Fiber Minist Educ Changchun Jilin Peoples R China;

    Changchun Univ Technol Engn Res Ctr Synthet Resin &

    Special Fiber Minist Educ Changchun Jilin Peoples R China;

    Changchun Univ Technol Engn Res Ctr Synthet Resin &

    Special Fiber Minist Educ Changchun Jilin Peoples R China;

    Changchun Univ Technol Engn Res Ctr Synthet Resin &

    Special Fiber Minist Educ Changchun Jilin Peoples R China;

    Changchun Univ Technol Engn Res Ctr Synthet Resin &

    Special Fiber Minist Educ Changchun Jilin Peoples R China;

    Changchun Univ Technol Engn Res Ctr Synthet Resin &

    Special Fiber Minist Educ Changchun Jilin Peoples R China;

    Changchun Univ Technol Engn Res Ctr Synthet Resin &

    Special Fiber Minist Educ Changchun Jilin Peoples R China;

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  • 正文语种 eng
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