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首页> 外文期刊>Advanced Functional Materials >Dual Physically Cross-Linked Hydrogels Incorporating Hydrophobic Interactions with Promising Repairability and Ultrahigh Elongation
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Dual Physically Cross-Linked Hydrogels Incorporating Hydrophobic Interactions with Promising Repairability and Ultrahigh Elongation

机译：具有疏水性相互作用的双物理交联水凝胶，具有有前途的可修复性和超高伸长率

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摘要

Novel dual physically cross-linked (DPC) hydrogels with great tensile strength, ultrahigh elongation, and promising repairability are designed by introducing cellulose nanocrystal (CNC) or hydrophobized CNC (CNC-C8) into polymers physically cross-linked by hydrophobic forces. C18 alkyl chain is grafted to N-[3-(dimethylamino)propyl]methacrylamide (DMAPMA) for hydrophobic monomer (DMAPMA-C18), and C8 to CNC surface for hydrophobic CNC (CNC-C8). CNC-C8 (or CNC) DPC hydrogels are synthesized, with monomers N,N-dimethylacrylamide (DMAc) and DMAPMA-C18 polymerized to form the first network physically cross-linked by hydrophobic interactions, on which the secondary cross-linking points are formed by hydrophobic interactions between CNC-C8 and DMAPMA-C18, electrostatic interactions between CNC-C8 (or CNC) and DMAPMA, as well as hydrogen bonding between CNC-C8 (or CNC) and DMAc. Compared with optimum CNC DPC hydrogels of the highest tensile strength (238 +/- 8 kPa), the optimum CNC-C8 DPC hydrogel with 0.0675 w/v% DMAPMA-C18 and 0.4 w/v% CNC-C8 possesses stronger tensile strength of 331 +/- 32 kPa and excellent elongation of 4268% +/- 1446% as well, demonstrating the enhanced mechanical property of the hydrogel by introduced hydrophobic interactions. In addition, such DPC hydrogel can be facilely repaired with tetrahydrofuran (THF) on the cut surfaces while retaining good tensile stress and elongation behaviors.
机译：通过将纤维素纳米晶（CNC）或疏水化的CNC（CNC-C8）引入物理交联的聚合物，通过将纤维素纳米晶（CNC）或疏水化的CNC（CNC-C8）引入疏水力地与疏水力地与物理交联物理交联的聚合物来设计的新型双重物理交联（DPC）水凝胶。将C18烷基链接枝到N- [3-（二甲基氨基）丙基]甲基丙烯酰胺（DMAPMA），用于疏水性单体（DMAPMA-C18），C8至CNC表面，用于疏水CNC（CNC-C8）。合成CNC-C8（或CNC）DPC水凝胶，用单体N，N-二甲基丙烯酰胺（DMAC）和DMAPMA-C18聚合，以形成通过疏水相互作用物理交联的第一网络，在此形成二次交联点通过CNC-C8和DMAPMA-C18之间的疏水相互作用，CNC-C8（或CNC）和DMAPMA之间的静电相互作用以及CNC-C8（或CNC）和DMAC之间的氢键。与最高拉伸强度（238 +/- 8kPa）的最佳CNC DPC水凝胶相比，具有0.0675W / V％DMAPMA-C18和0.4W / V％CNC-C8的最佳CNC-C8 DPC水凝胶具有更强的拉伸强度331 +/- 32 KPA和优异的4268％+/-1446％，并通过引入疏水相互作用来证明水凝胶的增强力量。此外，这种DPC水凝胶可以在切割表面上用四氢呋喃（THF）进行施用，同时保持良好的拉伸应力和伸长行为。

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  • 来源
    《Advanced Functional Materials》 |2021年第3期|2008187.1-2008187.9|共9页
  • 作者

    Liu Xinyao; He Xiao; Yang Bo; Lai Lu; Chen Ningxin; Hu Jinguang; Lu Qingye;

  • 作者单位

    Univ Calgary Dept Chem & Petr Engn 2500 Univ Dr NW Calgary AB T2N 1N4 Canada;

    Univ Calgary Dept Chem & Petr Engn 2500 Univ Dr NW Calgary AB T2N 1N4 Canada;

    Univ Calgary Dept Chem & Petr Engn 2500 Univ Dr NW Calgary AB T2N 1N4 Canada|Chengdu Univ Technol State Key Lab Oil & Gas Reservoir Geol & Exploita Chengdu 610059 Peoples R China;

    Univ Calgary Dept Chem & Petr Engn 2500 Univ Dr NW Calgary AB T2N 1N4 Canada|Yangtze Univ Coll Chem & Environm Engn Jingzhou 434023 Peoples R China;

    Univ Calgary Dept Chem & Petr Engn 2500 Univ Dr NW Calgary AB T2N 1N4 Canada;

    Univ Calgary Dept Chem & Petr Engn 2500 Univ Dr NW Calgary AB T2N 1N4 Canada;

    Univ Calgary Dept Chem & Petr Engn 2500 Univ Dr NW Calgary AB T2N 1N4 Canada;

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  • 关键词

    cellulose nanocrystals; dual hydrogels; hydrophobic interactions; physically cross-linked hydrogels; repairability;

    机译：纤维素纳米晶;双水凝胶;疏水相互作用;物理交联水凝胶;可修复性;

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