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The effects of silica/titania nanocomposite on the mechanical and bactericidal properties of cement mortars

机译：二氧化硅/二氧化钛纳米复合材料对水泥砂浆力学性能和杀菌性能的影响

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摘要

The scope of the study is to test the influence of nanocomposite silica-titania (mSiO(2)/TiO2) core-shell structures on the mechanical and bactericidal properties of cement mortars. Nanocomposites are widely applied in many fields of science however, cement-based composites are mainly modified with single type of nanostructures. The goal of the presented work is to obtain a nanocomposite which exhibits the positive properties of both nanomaterials, while diminishing the negative impacts of each of the nanomaterials applied separately. The study shows that application of silica-titania (mSiO(2)/TiO2) core shell nanostructures simultaneously demonstrated the properties of nanosilica and titanium dioxide and thus the nanomaterial behaved not only as a filler to improve the microstructure and activator to promote pozzolanic reaction, but also exhibited self-cleaning and bactericidal properties when exposed to UV light. The observed improvement of compressive strength was caused by the presence of nanosilica (acting as a core) while titanium dioxide (shell) exhibits photocatalytic activity. (C) 2017 Elsevier Ltd. All rights reserved.
机译：研究的范围是测试纳米复合二氧化硅-二氧化钛（mSiO（2）/ TiO2）核壳结构对水泥砂浆的机械和杀菌性能的影响。纳米复合材料广泛应用于许多科学领域，但是，水泥基复合材料主要采用单一类型的纳米结构进行改性。提出的工作的目的是获得一种既显示两种纳米材料的积极特性，又减少了分别应用的每种纳米材料的负面影响的纳米复合材料。研究表明，二氧化硅-二氧化钛（mSiO（2）/ TiO2）核壳纳米结构的应用同时证明了纳米二氧化硅和二氧化钛的特性，因此该纳米材料不仅充当了改善微结构的填料和促进火山灰反应的活化剂，但是当暴露于紫外线下时也表现出自清洁和杀菌特性。观察到的抗压强度的提高是由于存在纳米二氧化硅（充当核）而二氧化钛（壳）具有光催化活性。 （C）2017 Elsevier Ltd.保留所有权利。

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