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首页> 外文期刊>ACS applied materials & interfaces >Smart Hydrogels with Inhomogeneous Structures Assembled Using Nanoclay-Cross-Linked Hydrogel Subunits as Building Blocks
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Smart Hydrogels with Inhomogeneous Structures Assembled Using Nanoclay-Cross-Linked Hydrogel Subunits as Building Blocks

机译：以纳米粘土-交联水凝胶亚基为构建基组装的具有不均匀结构的智能水凝胶

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摘要

A novel and facile assembly strategy has been successfully developed to construct smart nanocomposite (NC) hydrogels with inhomogeneous structures using nanoclay-cross-linked stimuli-responsive hydrogel subunits as building blocks via rearranged hydrogen bonding between polymers and clay nanosheets. The assembled thermoresponsive poly(N-isopropylacrylamide-co-acrylamide) (poly(NIPAM-co-AM)) hydrogels with various inhomogeneous structures exhibit excellent mechanical properties due to plenty of new hydrogen bonding interactions created at the interface for locking the NC hydrogel subunits, which are strong enough to tolerate external forces such as high levels of elongations and multicycles of swelling/deswelling operations. The proposed approach is featured with flexibility and designability to build assembled hydrogels with diverse architectures for achieving various responsive deformations, which are highly promising for stimuli-responsive manipulation such as actuation, encapsulation, and cargo transportation. Our assembly strategy creates new opportunities for further developing mechanically strong hydrogel systems with complex architectures that composed of diverse internal structures, multistimuli-responsive properties, and controllable shape deformation behaviors in the soft robots and actuators fields.
机译：已经成功开发了一种新颖且简便的组装策略，可通过重新排列聚合物和粘土纳米片之间的氢键，使用纳米粘土交联的刺激响应水凝胶亚基作为构建基来构建具有不均匀结构的智能纳米复合（NC）水凝胶。具有各种不均匀结构的组装后的热响应性聚（N-异丙基丙烯酰胺-共-丙烯酰胺）（聚（NIPAM-co-AM））水凝胶具有出色的机械性能，这是由于在界面上产生了许多新的氢键相互作用，从而锁定了NC水凝胶亚基，其强度足以承受外力，例如高水平的伸长率和膨胀/溶胀操作的多个周期。所提出的方法具有灵活性和可设计性，以构建具有多种结构的组装水凝胶以实现各种响应变形，这对于刺激响应操纵（例如致动，封装和货物运输）具有很大的希望。我们的组装策略为进一步开发具有复杂结构的机械强度强的水凝胶系统创造了新的机会，该结构由多种内部结构，多种刺激响应特性以及可控的形状变形行为（在软机器人和执行器领域）组成。

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