碱式碳酸铜微球的表面改性和组装

报道了通过分散聚合反应在碱式碳酸铜微球表面锚接聚苯乙烯纳米粒子, 以调节其亲水/亲油性的方法. 结果表明, 锚接的聚苯乙烯纳米粒子尺寸愈大, 所得的改性碱式碳酸铜微球疏水性愈强. 用对油和水润湿性适中的改性碱式碳酸铜微球为乳化剂, 能够制备出稳定的油包水型Pickering乳液. 改性碱式碳酸铜微球组装在Pickering乳液的分散相液滴表面, 形成一个固体壳层. 将Pickering 乳液的分散相水核凝胶化, 合成出分级结构琼脂糖凝胶微球.

Surface Modification and Assembly of Cu2(OH)2CO3 Microspheres

To tune the surface wettability of Cu_2(OH)_2CO_3 microspheres, polystyrene nanoparticles were attached to their surfaces via a dispersion polymerization. The products were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD) and Fourier transmitting infrared spectrum (FT-IR). The immersion times of the modified Cu_2(OH)_2CO_3 microspheres in a water-methanol mixed solution were measured. The results showed that with the increase of the size of the attached polystyrene nanoparticles, the hydrophobicity of the modified Cu_2(OH)_2CO_3 microspheres was enhanced. Using polystyrene nanoparticle-attached Cu_2(OH)_2CO_3 microspheres with intermediate hydrophilicity as emulsifiers, stable water-in-tricaprylin Pickering emulsions were produced. By gelling the water droplets of the Pickering emulsions, the hierarchical structures of polystyrene nanoparticle-modified Cu_2(OH)_2CO_3 microspheres-armored agarose gel microspheres were obtained.