Surface Microstructure Regulation of Porous Polymer Microspheres by Volume Contraction of Phase Separation Process in Traditional Suspension Polymerization System

Abstract

In the present work, the suspension polymerization method is used for the preparation of porous polymer microspheres with different surface morphology, and the preparation mechanism is systematically expounded. The morphology results show that the smooth, convex, and wrinkled microspheres could be controlled by adjusting the ratio of monomer to porogens. The micelles forming the framework support the “Eggshell,” and its size and shape directly affect the morphology of “Eggshell.” The addition of monomers (GMA), whose polymer has low glass transition temperature (Tg), is important for the formation of wrinkled morphology. The amount of toluene and polydimethylsiloxane also affects the surface morphology of microspheres. In addition, the effect of polydimethylsiloxane is also more significant. The preparation process of the wrinkled P(GMA‐St‐EGDA) microspheres with abundant epoxy groups can be amplified. The morphology of the material prepared in the 100 L reactor is well maintained, and the yield in the size range of 80–160 µm is more than 80%. The surface wrinkled porous polymer microspheres have potential applications in the fields of enzyme carrier, separation and purification, and light scattering.

Synthetic Strategies for Polymer Particles with Surface Concavities

“…Compared to these of dimpled polymer particles, there are relatively few examples on the synthesis of surface-wrinkled polymer particles by polymerization. The reported polymerization techniques are basically based on one step, which include suspension polymerization, [183][184][185][186] dispersion polymerization, [187,188] Pickering emulsion polymerization, [189] surfactant-free emulsion polymerization, [190][191][192] miniemulsion polymerization [193] and photopolymerization. [194][195][196] We are aware that there is also few examples on seeded emulsion polymerization.…”

“…[56,197] Crosslinking of the polymer chain during the polymerization process is usually a prerequisite for the formation of the wrinkled surface. Several types of surface-wrinkled polymer particles have been prepared, such as poly(styrene-divinylbenzene)[P(St-DVB)], [183,187] poly(glycidyl methacrylate-styrene-ethyl glycol dimethyl methacrylate) [P(GMA-St-EGDA)], [184] poly(styreneethylene glycol dimethacrylate)[P(St-EGDMA)]@SiO 2 , [186] P(MMA-EGDMA), [187] P(GMA-DVB), [188] P(PGMA-DVB). [190][191][192]…”

“…Recently, Zhang and co-workers reported the preparation of wrinkled P(GMA-St-EGDA) microspheres by volume contraction of phase separation process during suspension polymerization at a suitable monomer/porogen ratio. [184] The addition of GMA, whose polymer has a low T g , was important for the wrinkling process. An amplified experiment at 100 L-scale showed a wellmaintained morphology.…”

Magnetic tubular carbon nanofibers as anode electrodes for high‐performance lithium‐ion batteries

“…Compared with traditional carbon materials such as graphene, carbon black, and porous carbon, 3,4 carbon nanofibers (CNFs) are one-dimensional carbon materials. CNFs have large aspect ratio, high specific surface area, compact structure, and anisotropy.…”

Preparation and Microwave Absorption Properties of C@Fe3O4 Magnetic Composite Microspheres

“…While bringing convenience to people’s daily lives and providing security for national defense, the deterioration of the electromagnetic environment caused by electromagnetic leakage cannot be ignored. Microwave absorbers have been considered as the most effective way to solve the electromagnetic leakage problem [1,2,3,4,5,6,7]. Among all the microwave absorption materials developed currently, carbon materials [8,9], magnetic materials [10,11] and their composites [12,13] are mainly used for three mechanisms of absorption and loss microwaves by absorbing materials, resistive loss, dielectric loss and magnetic loss mechanisms, respectively.…”