【作者】 田雷； 赵盼盼； 张秋禹； 李雪；

【Author】 Lei Tian;P P Zhao;Q Y Zhang;X Li;Department of Applied Chemistry, School of Science, Northwestern Polytechnical University;

【机构】 西北工业大学理学院应用化学系；

【摘要】 根据热力学观点,单体溶胀过程主要依赖于种子粒子的交联度。随着交联度的增大,种子粒子表面更易于形成液体凸起（即单体溶胀粒子,MSPs）^[1]。但是,高度交联的粒子难于进行再加工、成形以及重复利用。因此,探索新颖的基于非交联粒子制备单体溶胀各系异性粒子的方法显得尤为关键。聚甲基丙烯酸缩水甘油酯（PGMA）显示出优异的性能^[2,3]。这里,我们以非交联PGMA粒子为种子,提出双重加速溶胀技术构筑可聚合的MSPs。MSPs的不对称结构以及液体凸起的尺寸可由助溶胀剂与溶胀单体的比例进行精确调控（Fig 1a）。并且,此类固-液型MSPs可通过引发聚合得到形貌可控的Patchy微粒（Fig 1b）。对其进行酸化处理后,酸化的Patchy微粒具有良好的成膜性（Fig 1c）以及可调的润湿性（Fig 1d）。由于凸起而使粒子产生的多尺度效应使得所制备的Patchy微粒具有良好的光反射性,可应用于热障涂层等领域。更多还原

【Abstract】 From the principle of thermodynamics,non-crosslinked seed particles are difficult to be swollen into solid-liquid asymmetric monomer-swollen particles(MSPs).Generally,high crosslinking density contributes to generate liquid protrusions on the surface of seed particles.However,as a result of their high crosslinking density,such kind of functional particles are difficult to be reshaped and recycled,and difficult to form functional membrane directly.Therefore,it is particularly critical to exploit an original procedure for fabricating MSPs based on non-crosslinked seed particles.Herein,we selected non-crosslinked PGMA as seed particles,first developed a strategy defined as double speed swelling procedure to construct polymerizable MSPs with various asymmetric structures.The morphology evolution of MSPs from Janus-like to single-hole was observed,and the size of liquid protrusions can also be controlled by the ratio of swelling agent/monomer.Furthermore,the polymerization of solid-liquid MSPs were initiated to construct shape-controlled patchy microparticles.更多还原