Du Yang, Jia Shuai, Chen Ying, Zhang Li, Tan Jianbo
Department of Polymeric Materials and Engineering, School of Materials and Energy, Guangdong University of Technology, Guangzhou 510006, China.
Guangdong Provincial Key Laboratory of Functional Soft Condensed Matter, Guangzhou 510006, China.
ACS Macro Lett. 2021 Feb 16;10(2):297-306. doi: 10.1021/acsmacrolett.1c00014. Epub 2021 Feb 3.
Type I photoinitiators have been widely used in UV-vis curing technology for the fabrication of functional polymer materials such as coatings, inks, and adhesives. To overcome the drawbacks of using small molecular type I photoinitiators and expand the potential applications of UV-vis curing technology, attaching type I photoinitiators onto the surface of polymer colloids is an attractive strategy. Here we report a robust strategy for the efficient preparation of type I photoinitiator-functionalized block copolymer nanoparticles with various morphologies via aqueous reversible addition-fragmentation chain transfer (RAFT)-mediated polymerization-induced self-assembly (PISA), in which the photoinitiating ability of the type I photoinitiator end group provides a landscape for further functionalization. These block copolymer nanoparticles could also be used as heterogeneous photoinitiators to generate hydrogels with nanoparticles embedded inside. Significantly, the properties and functionalities of these hydrogels could be further controlled by using different block copolymer nanoparticles. This study provides a robust strategy toward the preparation of type I photoinitiator-functionalized block copolymer nanoparticles with the capacity to be modified with varying functionalities.
I型光引发剂已广泛应用于紫外-可见固化技术中，用于制备功能性聚合物材料，如涂料、油墨和粘合剂。为了克服使用小分子I型光引发剂的缺点并扩大紫外-可见固化技术的潜在应用，将I型光引发剂附着在聚合物胶体表面是一种有吸引力的策略。在此，我们报道了一种稳健的策略，通过水相可逆加成-断裂链转移（RAFT）介导的聚合诱导自组装（PISA）高效制备具有各种形态的I型光引发剂功能化嵌段共聚物纳米粒子，其中I型光引发剂端基的光引发能力为进一步功能化提供了条件。这些嵌段共聚物纳米粒子还可作为非均相光引发剂，用于制备内部嵌入纳米粒子的水凝胶。值得注意的是，通过使用不同的嵌段共聚物纳米粒子，可以进一步控制这些水凝胶的性质和功能。本研究为制备具有不同功能修饰能力的I型光引发剂功能化嵌段共聚物纳米粒子提供了一种稳健的策略。
