聚乙烯基四唑/氧化石墨烯基纳米复合物构筑纳米复合自修复水凝胶

Fabrication of Nanocomposite Self-Healing Hydrogels Based on Poly(Vinyltetrazole)/Graphene Oxide Nanocomposites

通过电子转移生成催化剂的原子转移自由基聚合(AGET-ATRP)技术,在氧化石墨烯(GO)表面引入可控性聚丙烯腈(PAN)聚合物,通过高效点击反应将腈基修饰成功能性四唑结构,设计聚乙烯基四唑(PVT)/氧化石墨烯基纳米复合物(PVT-g-GO)。将其引入水凝胶中,基于金属—络合作用,合成具有较强自修复性能的PAA/PVT-g-GO纳米复合自修复水凝胶。水凝胶的自修复率为96.40%,拉伸强度达3.71 MPa,在柔性传感器等领域具有潜在的运用前景。

Poly(vinyltetrazole)(PVT)/graphene oxide(GO)nanocomposites(PVT-g-GO)were successfully designed by introducing controllable polyacrylonitrile(PAN)polymer on the surface of GO by the activators generated electron transfer for atom transfer radical polymerization(AGET-ATRP)technology.An efficient click reaction was used to draw functional tetrazole group into the surface of GO-type nanocomposites.After introducing these nanocomposites into the hydrogels,PAA/PVT-g-GO nanocomposite hydrogels with strong self-healing properties were further prepared by the multiple reversible non-covalent interactions.These functional nanocomposite hydrogels have excellent self-healing efficiency(~96.4%)strong and robust mechanical strength(~3.71 MPa),which have the application potentials for flexible sensors.