Influence of the Addition of TiO2 Nanoparticles on the Self-Cleaning Capacity of Cementitious Composites

被引:1
作者
Florean, Carmen Teodora [1 ,2 ]
Csapai, Alexandra [1 ,2 ]
Vermesan, Horatiu [1 ]
Gabor, Timea [1 ]
Hegyi, Andreea [1 ,2 ]
Stoian, Vlad [3 ]
Uriciuc, Willi Andrei [4 ]
Petcu, Cristian [2 ]
Cimpan, Marius [5 ]
机构
[1] Tech Univ Cluj Napoca, Fac Mat & Environm Engn, 103-105 Muncii Blvd, Cluj Napoca 400641, Romania
[2] Natl Inst Res & Dev Construct Urban Planning & Su, Cluj Napoca Branch, 117 Calea Floresti, Cluj Napoca 400524, Romania
[3] Univ Agr Sci & Vet Med Cluj Napoca, Fac Agr, Dept Plant Culture Microbiol, 3-5 Calea Manastur, Cluj Napoca 400372, Romania
[4] Iuliu Haieganu Univ Med & Pharm, Fac Dent Med, Cluj Napoca 400012, Romania
[5] Tech Univ Cluj Napoca, Fac Civil Engn, 15 Constantin Daicoviciu Str, Cluj Napoca 400020, Romania
关键词
TiO2; nanoparticles; self-cleaning; self-sanitising; cementitious composites; recycled aggregates; TITANIUM-DIOXIDE; PHOTOCATALYTIC INACTIVATION; ANTIBACTERIAL ACTIVITY; MECHANICAL-PROPERTIES; DURABILITY PROPERTIES; PRESENT SITUATION; CONCRETE; WASTE; BEHAVIOR; BIODETERIORATION;
D O I
10.3390/ma17133098
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
This study evaluated the potential of incorporating TiO2 nanoparticles (NT) into cementitious composites to provide self-cleaning and self-sanitising properties, as well as the partial replacement of natural aggregates with recycled glass (RGA), ceramic brick (RBA), granulated blast furnace slag (GBA), and textolite waste (RTA) from electronic equipment on these properties. Based on the research results, the addition of NT to cementitious composites led to a significant reduction in contact angle, which means an increase in surface hydrophilicity. At the same time, Rhodamine B stain fading was highlighted, with the degree of whiteness recovery of NT composites exceeding that of the control by up to 11% for natural aggregate compositions, 10.6% for RGA compositions, 19.9% for RBA compositions, 15% for GBA compositions, and 13% for RTA compositions. In a mould-contaminated environment, it was shown that the introduction of NT allowed the material to develop a biocidal surface capacity which is also influenced by the nature of the aggregates used. Furthermore, the study revealed that, under controlled conditions, certain recycled waste aggregates, such as textolite, promoted mould growth, while others, such as brick and slag, inhibited it, highlighting not just the effect of the addition of NT, but also the significant influence of the aggregate type on the microbial resistance of cementitious composites. These improvements in the performance of cementitious composites are particularly advantageous when applied to prefabricated elements intended for the finishing and decorative surfaces of institutional (schools, administrative buildings, religious structures, etc.) or residential buildings.
引用
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页数:27
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