Institute of Symbiotic Science and Technology, Tokyo University of Agriculture and Technology, 2-24-16 Nakacho, Koganei, Tokyo 184-8588, Japan.
J Am Chem Soc. 2009 Nov 18;131(45):16342-3. doi: 10.1021/ja906655r.
An anionic surfactant comprising a hydrophilic poly(ethylene glycol) (PEG) chain, hydrophobic alkyl chain, and polymerizable vinyl group was synthesized as a capping agent of nanoparticles. TiO(2) nanoparticles modified by this surfactant were completely dispersible in various organic solvents with a wide range of polarities, such as nitriles, alcohols, ketones, and acetates. Furthermore, these particles were found to be dispersible in various polymers with different properties, such as thermosetting epoxy resins and radical polymerized poly(methylmethacrylate) (PMMA). A polymer composite of surface-modified TiO(2) nanoparticles in epoxy resins prepared by using the developed surfactant also possessed temperature-induced shape memory properties.
一种包含亲水性聚乙二醇（PEG）链、疏水烷基链和可聚合乙烯基的阴离子表面活性剂被合成作为纳米颗粒的封端剂。用这种表面活性剂修饰的 TiO2 纳米颗粒完全分散在各种有机溶剂中，这些有机溶剂的极性范围很广，包括腈类、醇类、酮类和醋酸盐。此外，还发现这些颗粒可以分散在具有不同性质的各种聚合物中，如热固性环氧树脂和自由基聚合的聚甲基丙烯酸甲酯（PMMA）。通过使用所开发的表面活性剂制备的环氧树脂中表面改性 TiO2 纳米颗粒的聚合物复合材料也具有温度诱导形状记忆性能。
