This dissertation describes the development of superhydrophobicity in fluorosilane treated diatomaceous earth (DE) particles and polymer coatings. The amount of silane coupling agent on the surface of DE particles has been determined by thermogravimetric analysis (TGA). The presence of silane coupling agents on the DE particles has been confirmed by Fourier transform infrared spectroscopy (FTIR). The minimum amount of fluorosilane coupling agent required to exhibit superhydrophobicity has been determined. The development of the superhydrophobicity in the coatings with simple polymers like polystyrene (PS) or poly(vinyl acetate) (PVAc) as binders has been followed as a function of the particle loading using contact angle measurements and scanning electron microscopy.;The effect of particle morphology in the development of superhydrophobicity has been studied systematically. It was found that less-dense treated CelTix DE particles produced superhydrophobicity at 30 wt% of particles loading compared to more dense treated DiaFil DE (rod-shaped) and EcoFlat DE (irregularly shaped) particles with low molecular mass polystyrene binder system. The effects of particle morphology, surface area, porosity and density in the development of superhydrophobicity have been described.;The effect of viscosity of the binder solution in the development of superhydrophobicity has been observed. Changes in the solvent systems have not affected the superhydrophobicity for similar coating compositions. The DE particles were found to be robust and the coatings prepared with the sonicated DE samples also exhibited superhydrophobicity.;Additionally, untreated and treated diatomaceous earth particles and epoxy composites have been prepared. The thermal and dynamic mechanical properties of DE/epoxy composites have been evaluated. The mechanical properties of the DE/epoxy composites revealed that treated DE particles act as better reinforcing agents compared to untreated DE particles.
展开▼
机译：本文介绍了氟硅烷处理的硅藻土（DE）颗粒和聚合物涂层中超疏水性的发展。通过热重分析（TGA）确定了DE颗粒表面上的硅烷偶联剂的量。通过傅立叶变换红外光谱法（FTIR）已经证实了DE颗粒上硅烷偶联剂的存在。已经确定了表现出超疏水性所需的最小量的氟硅烷偶联剂。使用接触角测量和扫描电子显微镜观察了简单的聚合物如聚苯乙烯（PS）或聚醋酸乙烯酯（PVAc）作为粘合剂在涂料中超疏水性的发展，这是颗粒负载的函数。对超疏水性发展过程中的颗粒形态进行了系统的研究。已经发现，与具有低分子量聚苯乙烯粘合剂体系的密度更高的DiaFil DE（棒状）和EcoFlat DE（不规则形状）的颗粒相比，密度较小的经处理的CelTix DE颗粒在颗粒负载量的30 wt％时产生超疏水性。描述了颗粒形态，表面积，孔隙率和密度在超疏水性发展中的影响。；已观察到粘合剂溶液的粘度对超疏水性发展的影响。溶剂体系的变化并未影响类似涂料组合物的超疏水性。发现DE颗粒坚固并且用超声处理的DE样品制备的涂层也表现出超疏水性。此外，还制备了未处理和处理的硅藻土颗粒和环氧复合材料。已经评估了DE /环氧树脂复合材料的热和动态力学性能。 DE /环氧树脂复合材料的机械性能表明，与未处理的DE颗粒相比，已处理的DE颗粒可作为更好的增强剂。
展开▼
机译：用于啤酒的二次过滤的过滤材料及其生产方法技术领域本发明涉及一种用于包含硅藻土的啤酒的二次过滤的过滤材料及其制备方法，其中在与过滤的啤酒的流动相反的方向上，所述过滤材料为由第一层粗过滤硅藻土制成，其厚度大于2毫米，过滤面积的范围为0.66至1.05 kg / me2，第二层由混合物制成，厚度大于2毫米过滤面积为0.55至1.20 kg / me2的细过滤硅藻土和过滤面积为0.10至0.20 kg / me2的吸附材料，第三过滤层具有粗滤硅藻土和细滤硅藻土的重量比为10:90至30:70的混合物产生的厚度大于1.5mm。
