Kamlangmak Netnapha, Rattanawongwiboon Thitirat, Minami Hideto, Chaiyasat Amorn
Department of Chemistry, Faculty of Science and Technology, Rajamangala University of Technology Thanyaburi, Thanyaburi, Pathum Thani 12110, Thailand.
Thailand Institute of Nuclear Technology (Public Organization), Ongkarak, Nakornnayok 26120, Thailand.
ACS Omega. 2025 Apr 28;10(18):19082-19095. doi: 10.1021/acsomega.5c01455. eCollection 2025 May 13.
Microsuspension polymerization was used to create multihollow polymer particles. First, a block copolymer of poly(2-(dimethylamino)ethyl methacrylate)--poly(methyl methacrylate-3-(trimethoxysilyl) propyl methacrylate) (PDMAEMA--P(MMA-MPS)) was synthesized by using a solution iodine transfer polymerization (solution ITP). This block copolymer was then used as a porogen in microsuspension polymerization of ethylene glycol dimethacrylate (EGDMA) and hydroxyethyl methacrylate (HEMA) to create multihollow structures of P(EGDMA-HEMA) particles. The polymerization process was smooth, achieving 99% monomer conversion within 24 h. Scanning electron microscopy (SEM) confirmed the multihollow structure, while surface area analysis (BET) showed well-defined porosity. Moreover, a positive charge might have been derived from the PDMAEMA segment, verifying that the particles contained the PDMAEMA--P(MMA-MPS) block copolymer. Dye adsorption studies in both water and oil confirmed that the particles successfully formed multihollow structures. Moreover, the multihollow P(EGDMA-HEMA) particles maintained over 80% adsorption efficiency even after being reused ten times. This procedure is both basic and versatile, offering an effective means to produce multihollow polymer particles utilizing block copolymers as porogens, making it highly promising for various applications.
微悬浮聚合法用于制备多中空聚合物颗粒。首先，通过溶液碘转移聚合（溶液ITP）合成了聚（甲基丙烯酸2-（二甲氨基）乙酯）-聚（甲基丙烯酸甲酯-3-（三甲氧基硅基）丙酯）（PDMAEMA-P（MMA-MPS））嵌段共聚物。然后将该嵌段共聚物用作乙二醇二甲基丙烯酸酯（EGDMA）和甲基丙烯酸羟乙酯（HEMA）微悬浮聚合的致孔剂，以制备P（EGDMA-HEMA）颗粒的多中空结构。聚合过程顺利，24小时内单体转化率达到99%。扫描电子显微镜（SEM）证实了多中空结构，而表面积分析（BET）显示孔隙率明确。此外，正电荷可能源自PDMAEMA链段，证实颗粒中含有PDMAEMA-P（MMA-MPS）嵌段共聚物。在水和油中的染料吸附研究证实颗粒成功形成了多中空结构。此外，多中空P（EGDMA-HEMA）颗粒即使在重复使用十次后仍保持超过80%的吸附效率。该方法既基础又通用，提供了一种利用嵌段共聚物作为致孔剂生产多中空聚合物颗粒的有效手段，使其在各种应用中极具前景。
