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首页> 外文期刊>Journal of industrial and engineering chemistry >Preparation of monodispersed PNIPAm/silica composites and characterization of their thermal behaviors
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Preparation of monodispersed PNIPAm/silica composites and characterization of their thermal behaviors

机译：单分散PNIPAm /二氧化硅复合材料的制备及其热行为表征

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Two types of thermosensitive poly(N-isopropylacrylamide) (PNIPAm)-silica organic/inorganic hybrid particles were successfully prepared in aqueous solution through a facile synthetic process. Silane coupler of vinyl organic groups connects the PNlPAm to silica. First, hybrid spheres were prepared by grafting PNIPAm polymers to VTMS (vinyl trimethoxysilane) silica spheres. The thickness of polymer shell on the silica surfaces could be easily controlled by varying the concentrations of NIPAm monomer. Second, another type of hybrid particle was fabricated by encapsulating PNIPAm polymer with silica materials. The PNIPAm polymers were completely encapsulated by silica shell. The morphologies and shell thickness were characterized through SEM and TEM. The variations of phase transition temperature of PNIPAm were measured using DSC.
机译：通过一种简便的合成方法，成功地在水溶液中制备了两种类型的热敏性聚（N-异丙基丙烯酰胺）（PNIPAm）-二氧化硅有机/无机杂化颗粒。乙烯基有机基团的硅烷偶联剂将PNlPAm连接到二氧化硅。首先，通过将PNIPAm聚合物接枝到VTMS（乙烯基三甲氧基硅烷）二氧化硅球上来制备杂化球。通过改变NIPAm单体的浓度，可以容易地控制二氧化硅表面上的聚合物壳的厚度。其次，通过用二氧化硅材料封装PNIPAm聚合物来制造另一种类型的杂化颗粒。 PNIPAm聚合物被硅胶壳完全包封。通过SEM和TEM表征了形貌和壳厚度。使用DSC测量PNIPAm的相变温度的变化。

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