活性/可控自由基聚合在摩擦学中的应用和研究进展

Applications and Research Progress of Living/Controlled Free Radical Polymerization in Tribology

活性/可控自由基聚合(CRP)是一种灵活且可控的聚合技术,通过CRP可得到具有精确分子量、结构和性质的聚合物,其在材料科学和化学工程等领域中具有广泛的应用。本文以CRP为主要手段获得的聚合物在摩擦学领域的应用为出发点,综述了可控聚合表面改性的摩擦学研究,聚合物润滑添加剂的合成及它们对润滑油黏度和性能的改善。文中首先描述了聚合物刷的合成方法和在不同维度表面改性时的作用和优势,总结了其独特的润滑机理,并介绍了盐、pH、光等刺激响应型聚合物刷研究现状。其次,分析了CRP技术合成的具有三维结构的胶束、支化聚合物等聚合物润滑添加剂对润滑油黏度的改性和减摩抗磨性能的提升,并总结了它们作为润滑添加剂在润滑方面的优势和润滑机理。

Living/controlled free radical polymerization(CRP)stands out as a versatile and highly controllable polymerization technique,facilitating the precise tuning of molecular weights,structures,and properties of polymers throughout the polymerization process.This methodology finds extensive application across diverse domains such as materials science and chemical engineering.This review delves into the tribological implications of polymers primarily synthesized via CRP.It provides a comprehensive examination of tribology studies related to controlled polymerization surface modifications and the synthesis of polymer lubrication additives.It also discusses their subsequent effects on lubricant viscosity and performance enhancements.Firstly,the paper describes the synthesis method of polymer brushes and their roles and advantages in surface modification across various dimensions.It summarizes their unique lubrication mechanism and introduces the current research status on stimulus-responsive polymer brushes,including responses to salt,pH,and light.Secondly,we analyzed the modification of lubricant viscosity and the enhancement of friction reduction and anti-wear properties of polymeric lubricant additives with a three-dimensional structure,such as micelles and branched polymers synthesized by CRP technology.The advantages of using them as lubrication additives and their lubrication mechanisms are summarized.