Physics Group, Bhabha Atomic Research Centre, Mumbai, 400085, India.
Solid State Physics Division, Bhabha Atomic Research Centre, Mumbai, 400085, India, India.
Colloids Surf B Biointerfaces. 2018 May 1;165:182-190. doi: 10.1016/j.colsurfb.2018.02.040. Epub 2018 Feb 19.
Spray drying had been used to synthesize silica-carbon black nanocomposite micrometric granules with a uniform distribution of the two components. This was achieved by hindering the preferential diffusion of hydrophobic carbon and hydrophilic silica particles in the water droplets during evaporative assembly by introducing gum arabic as a stabilizing agent and network former. Both positive and negatively charged silica nanoparticles were used to check the stability of the sol and its effect on the morphology of the spray dried granules. X-ray and neutron scattering, complemented with electron microscopy, were used to investigate the correlation and distribution of the nanoparticles within the granules. Porous silica granules, having surface area of 157 m/g, were obtained after removal of carbon black by calcination. An environment-friendly solar absorbing coating had been prepared using as synthesized granules.
喷雾干燥被用于合成具有两种组分均匀分布的硅-炭黑纳米复合材料微颗粒。这是通过引入阿拉伯胶作为稳定剂和网络形成剂来阻碍疏水性碳和亲水性二氧化硅颗粒在蒸发组装过程中在液滴中的优先扩散来实现的。使用正电荷和负电荷的二氧化硅纳米颗粒来检查溶胶的稳定性及其对喷雾干燥颗粒形态的影响。X 射线和中子散射，辅以电子显微镜，用于研究颗粒内纳米颗粒的相关性和分布。通过煅烧除去炭黑后，得到了比表面积为 157m/g 的多孔硅颗粒。使用合成的颗粒制备了环保的太阳能吸收涂层。
