Formation of Polymer Grafted Nanoparticles in Supercritical CO2

我们描述了在高压二氧化碳(CO2)中利用超声波辐射的纳米粒子的分散和表面修饰技术。超声辐照产生的空化气泡崩塌产生的冲击波加速了纳米颗粒在高压二氧化碳中的解聚和分散。以甲基丙烯酸三甲氧基硅丙酯(TPM)和高压二氧化碳为催化剂，采用传统的自由基聚合法合成了纳米氧化锌量子点/聚甲基丙烯酸甲酯(PMMA)复合材料。制备了氧化锌纳米量子点与PMMA的透明聚合物杂化薄膜。尝试将二氧化硅包覆的氧化锌纳米颗粒量子点与生物素一起用于细胞标记应用。

We describe the dispersion and surface modification techniques of nanoparticles using ultrasonic irradiation in high-pressure carbon dioxide (CO2). Shock waves generated by collapsing cavitation bubbles induced with ultrasonic irradiation accelerated the deagglomeration and dispersion of nanoparticles in high-pressure CO2. ZnO nanoparticle quantum dots (QDs)/poly(methyl methacrylate) (PMMA) composites are synthesized by conventional radical polymerization in the presence of 3(trimethoxysilyl)propylmethacrylate (TPM) and high-pressure CO2. The transparent polymeric hybrid films of ZnO nanoparticle QDs and PMMA are obtained. Use of the silica-coated ZnO-nanoparticle QDs with biotin in cell-labeling applications was attempted.