Fabrication of mesoporous crystalline microparticles of poly(ether sulfone) via solvent-induced crystallization
Fabrication of mesoporous crystalline microparticles of poly(ether sulfone) via solvent-induced crystallization
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DOI：
10.1016/j.polymer.2022.124744
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发表时间：
2022-04
期刊：
影响因子：
4.6
通讯作者：
Sadaki Samitsu
中科院分区：
文献类型：
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作者：
Sadaki Samitsu
介孔聚合物微粒在能源、环境和生物医学领域具有广阔的应用前景。从聚合物再循环的角度来看，线性聚合物微粒是期望的。在这项研究中，介孔结晶微粒的市售高性能聚合物，聚醚砜（PES），制备。溶剂诱导结晶法制备的PES微球平均粒径为5 μm，粒径分布较窄。的微观结构和中孔率的微粒，其特征在于与扫描电子显微镜，X-射线衍射，差示扫描量热法，和氮吸附/脱附，这给出了一个孔径分布峰值在7 nm的孔隙率为0.44。傅里叶变换红外光谱、拉曼光谱和热重分析证实了PES和硝基苯的共晶。根据高分子球晶形成理论，阐明了PES微粒的形成机理。本研究提供了一个洞察力的溶剂诱导结晶刚性高Tg聚合物的介孔聚合物粒子的制造有用的。
Mesoporous polymer microparticles are promising for energy, environmental, and biomedical applications. A linear polymer microparticle is desirable from the perspective of polymer recycling. In this study, mesoporous crystalline microparticles of a commercially available high-performance polymer, poly(ether sulfone) (PES), were prepared. Solvent-induced crystallization of PES in nitrobenzene resulted in nearly spherical microparticles with an average size of 5 μm and narrow size distribution. The microstructure and mesoporosity of the microparticles were characterized with scanning electron microscopy, X-ray diffraction, differential scanning calorimetry, and nitrogen adsorption/desorption, which gave a pore size distribution peaking at 7 nm with a porosity of 0.44. Fourier-transform infrared spectroscopy, Raman spectroscopy, and thermogravimetric analysis confirmed the cocrystal of PES and nitrobenzene. The formation mechanism of the PES microparticles was elucidated based on the theory of polymer spherulite formation. This study gives an insight on solvent-induced crystallization of rigid high-Tgpolymers useful for the mesoporous polymer particle fabrication.