In this study, a macroinitiator of β-CD-ONa was prepared by a substitution reaction of β-cyclodextrin (β-CD) with sodium (Na). The macroinitiator was then used in the ring-opening polymerization of octamethylcyclotetrasiloxane (D4) to obtain a star polymer, in which β-CD is the core and polysiloxane is the arm. FTIR, NMR, TGA, CA, etc., were used to characterize the structure and properties of star polymers. The results indicated that there were four polysiloxane arms attached to each β-CD core, and the star polymer had good thermal stability. With the increase in D4 monomer dosage, the hydrophobicity of the star polymer slightly improved, but the reaction time had no significant effect on hydrophobicity. When the star polymer was coated onto polyethylene terephthalate membrane, the transmittance increased from 87.6% to 92.8%, and the haze did not change significantly. Furthermore, the surface of star polymer porous membranes was prepared by the static breath-figure method using n-hexane as solvent at 30 °C. The results showed uniform pore distribution and increased hydrophobicity.

中文翻译：

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β-环糊精中心聚硅氧烷星形聚合物的合成与表征

在这项研究中，β-CD-ONa 的大分子引发剂是通过 β-环糊精 (β-CD) 与钠 (Na) 的取代反应制备的。然后将大分子引发剂用于八甲基环四硅氧烷（D4）的开环聚合，得到星形聚合物，其中β-CD为核，聚硅氧烷为臂。FTIR、NMR、TGA、CA等用于表征星形聚合物的结构和性能。结果表明，每个β-CD核上连接了四个聚硅氧烷臂，星形聚合物具有良好的热稳定性。随着D4单体用量的增加，星形聚合物的疏水性略有提高，但反应时间对疏水性没有显着影响。当星形聚合物涂覆在聚对苯二甲酸乙二醇酯膜上时，透光率从87.6%提高到92.8%，并且雾度没有明显变化。此外，使用正己烷作为溶剂在 30 ℃下通过静态呼吸图法制备星形聚合物多孔膜的表面。结果显示出均匀的孔分布和增加的疏水性。