An infrared-light responsive graphene-oxide incorporated poly(N-isopropylacrylamide) hydrogel nanocomposite
An infrared-light responsive graphene-oxide incorporated poly(N-isopropylacrylamide) hydrogel nanocomposite
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DOI：
10.1039/c1sm00011j
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发表时间：
2011-01-01
期刊：
影响因子：
3.4
通讯作者：
Jiang, Hongrui
中科院分区：
文献类型：
--
作者：
Lo, Chi-Wei;Zhu, Difeng;Jiang, Hongrui
我们展示了一种新的光响应性聚（N-异丙基丙烯酰胺）（PNIPAAm）水凝胶纳米复合材料纳入甲基丙烯酸缩水甘油酯功能化的氧化石墨烯（GO-GMA），而不是金属纳米粒子填料。GO-GMA是通过与甲基丙烯酸缩水甘油酯酯化来合成的。以4-二甲氨基吡啶（DMAP）和N，N '-亚甲基双丙烯酰胺（NMBA）为单体，在GO-GMA分散的二甲基亚砜（DMSO）溶液中进行光聚合，合成了GO-GMA掺杂的NIPAAm水凝胶。结果表明，这种纳米复合水凝胶可以经历一个大的体积变化，响应于红外（IR）光照射，由于高效的光热转换的GO-GMA。与常规PNIPAAm水凝胶相比，其还表现出显著更大的吸水率3倍。基于所开发的IR响应纳米复合水凝胶，我们还实现了一种微阀，其通过远程IR光致动来控制微流体通道内的流体流动。
We demonstrate a new light-responsive poly(N-isopropylacrylamide) (PNIPAAm) hydrogel nanocomposite incorporating glycidyl methacrylate functionalized graphene oxide (GO-GMA) instead of metallic nanoparticle fillers. GO-GMA is synthesized by esterification with glycidyl methacrylate. GO-GMA incorporated hydrogels are synthesized by photopolymerization of NIPAAm including 4-dimethylaminopyridine (DMAP) and N,N'-methylenebisacrylamide (NMBA) in GO-GMA dispersed dimethyl sulfoxide (DMSO) solution. Results show that such a nanocomposite hydrogel can undergo a large volumetric change in response to infrared (IR) light illumination, due to the highly efficient photothermal conversion of GO-GMA. It also exhibits significantly larger water uptake compared to conventional PNIPAAm hydrogel by 3 times. Based on the developed IR-responsive nanocomposite hydrogel, we have also realised a microvalve that controls the fluidic flow within a microfluidic channel through remote IR light actuation.