Near-Infrared Light-Responsive Poly(N-isopropylacrylamide)/Graphene Oxide Nanocomposite Hydrogels with Ultrahigh Tensibility
Near-Infrared Light-Responsive Poly(N-isopropylacrylamide)/Graphene Oxide Nanocomposite Hydrogels with Ultrahigh Tensibility
复制标题
DOI：
10.1021/acsami.5b08609
复制
发表时间：
2015-12-16
影响因子：
9.5
通讯作者：
Chu, Liang-Yin
中科院分区：
文献类型：
--
作者：
Shi, Kun;Liu, Zhuang;Chu, Liang-Yin
将小分子的稀疏化学交联与氧化石墨烯纳米片的物理交联相结合，制备了具有超高拉伸性能的新型近红外（NIR）光响应型聚n -异丙基丙烯酰胺/氧化石墨烯（PNIPAM-GO）纳米复合水凝胶。氧化石墨烯纳米片和热敏性聚（n -异丙基丙烯酰胺）（PNIPAM）聚合物网络的结合为水凝胶提供了优异的NIB。light-responsive财产。PNIPAM-GO纳米复合水凝胶的超高拉伸性是通过简单地使用极低浓度的N，N'-亚甲基双（丙烯酰胺）（BIS）分子作为化学交联剂来生成相对均匀的结构，具有柔性的长聚合物链和罕见的化学交联密集簇。此外，氧化石墨烯纳米片的氧化基团能够与PNIPAM链的酰胺基团形成氢键相互作用，这可以使PNIPAM链产生物理交联，从而增加水凝胶网络的韧性。制备的PNIPAM-GO纳米复合水凝胶具有超高拉伸性能，具有快速、可逆、可重复的近红外光响应特性，在远程光控器件、智能执行器、人造肌肉等领域具有广阔的应用前景。
Novel near-infrared (NIR) light-responsive poly(N-isopropylacrylamide)/graphene oxide (PNIPAM-GO) nanocomposite hydrogels with ultrahigh tensibility are prepared by incorporating sparse chemical cross-linking of small molecules with physical cross-linking of graphene oxide (GO) nanosheets. Combination of the GO nanosheets and thermoresponsive poly(N-isopropylacrylamide) (PNIPAM) polymeric networks provides the hydrogels with an excellent NIB. light-responsive property. The ultrahigh tensibility of PNIPAM-GO nanocomposite hydrogels is achieved by simply using a very low concentration of N,N'-methylenebis(acrylamide) (BIS) molecules as chemical cross-linkers to generate a relatively homogeneous structure with flexible long polymer chains and rare chemically cross-linked dense clusters. Moreover, the oxidized groups of GO nanosheets enable the formation of a hydrogen bond interaction with the amide groups of PNIPAM chains, which could physically cross-link the PNIPAM chains to increase the toughness of the hydrogel networks. The prepared PNIPAM-GO nanocomposite hydrogels with ultrahigh tensibility exhibit rapid, reversible, and repeatable NIR light-responsive properties, which are highly promising for fabricating remote light-controlled devices, smart actuators, artificial muscles, and so on.