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- 2018
超疏水、自清洁涂层对建筑墙体的防护
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Abstract:
随着工业水平的快速提高，我国的空气污染日益严重。建筑物外墙常年暴露在空气中，外观污染严重，而且附着于其表面的各类污染物难以清除。因此，建筑墙体的防护措施已经成为研究的热点。本文中，以聚二甲基硅氧烷（PDMS）和疏水SiO2为基本原料，制备了可用于建筑墙体防护的自清洁涂层。将配制好的涂层喷涂在建筑墙体上，通过室温固化，便可形成具有自洁净效果的涂层。本文通过分析涂层材料与建筑墙体结合机制，说明涂层与墙体具有较强的黏附作用。由于涂层具有的超疏水特性，附着在其表面的颗粒及液体污染物很容易通过水流清洗干净。此外，实验还表明：该涂层在5个月户外环境下，其自清洁效果无显著的变化。 With the rapid improvement of the industry, the air pollution in our country is increasing seriously. As the exterior walls of the buildings are exposed to the air all year round, the various kinds of pollutants attached to the walls are difficult to remove. Therefore, the protective measures of building walls have attracted more and more attention. In this paper, a self-cleaning coating for building wall protection was proposed, which was mainly the compound of the polydimethylsiloxane (PDMS) and hydrophobic SiO2. The prepared coating was sprayed on the building wall and cured at room temperature to form a self-cleaning coating. Through the analysis of the combination mechanism of the coating and building wall, it shows that the coating has a strong adhesion to the wall. Due to the super-hydrophobic property of the coating, the particulate pollutants and the liquid contaminants attached to the wall are easily cleaned through water flow. Furthermore, the experiments also show that the self-cleaning effect of the coating do not change significantly even after five months in the outdoor environment. 国家自然科学基金面上项目（51475353）；陕西省自然科学基金面上项目（2016JM5004）；清华大学摩擦学国家重点实验室开放基金（SKLTKF14A02）
| [1] | PAPENHEIM M, MAYER A, WANG S, et al. Flat and highly flexible composite stamps for nanoimprint, their preparation and their limits[J]. Journal of Vacuum Science & Technology B:Nanotechnology and Microelectronics-Materials, Processing, Measurement and Phenomena, 2016, 34(6):06K406. |
| [2] | YANG J, PI P, WEN X, et al. A novel method to fabricate superhydrophobic surfaces based on well-defined mulberry-like particles and self-assembly of polydimethylsiloxane[J]. Applied Surface Science, 2009, 255(6):3507-3512. |
| [3] | ABAD S V A N K, TUGRUL A, GOKCEOGLU C, et al. Characteristics of weathering zones of granitic rocks in Malaysia for geotechnical engineering design[J]. Engineering Geo-logy, 2016, 200:94-103. |
| [4] | CARRASCOSA L A M, FACIO D S, MOSQUERA M J. Producing superhydrophobic roof tiles[J]. Nanotechnology, 2016, 27(9):095604. |
| [5] | KRONLUND D, BERGBREITER A, LINDEN M, et al. Hydrophobization of marble pore surfaces using a total immersion treatment method-Influence of co-solvents and temperature on fluorosurfactant vesicle behavior[J]. Colloids and Surfaces A:Physicochemical and Engineering Aspects, 2015, 483:104-111. |
| [6] | EIRES R, CAMOES A, JALALI S. Enhancing water resistance of earthen buildings with quicklime and oil[J]. Journal of Cleaner Production, 2017, 142:3281-3292. |
| [7] | BELFIORE C M, BARCA D, BONAZZA A, et al. Application of spectrometric analysis to the identification of pollution sources causing cultural heritage damage[J]. Environmental Science and Pollution Research, 2013, 20(12):8848-8859. |
| [8] | ZARZUELA R, CARBU M, GIL M L A, et al. CuO/SiO2 nanocomposites:A multifunctional coating for application on building stone[J]. Materials & Design, 2017, 114:364-372. |
| [9] | ALFIERI I, LORENZI A, RANZENIGO L, et al. Synthesis and characterization of photocatalytic hydrophobic hybrid TiO2-SiO2 coatings for building applications[J]. Building and Environment, 2017, 111:72-79. |
| [10] | KAPRIDAKI C, PINHO L, MOSQUERA M J, et al. Producing photoactive, transparent and hydrophobic SiO2-crystalline TiO2 nanocomposites at ambient conditions with application as self-cleaning coatings[J]. Applied Catalysis B:Environmental, 2014, 156:416-427. |
| [11] | KAPRIDAKI C, MARAVELAKI K P. TiO2-SiO2-PDMS nano-composite hydrophobic coating with self-cleaning properties for marble protection[J]. Progress in Organic Coatings, 2013, 76(2):400-410. |
| [12] | KRONLUND D, LINDEN M, SMATT J H. A polydimethylsiloxane coating to minimize weathering effects on granite[J]. Construction and Building Materials, 2016, 124:1051-1058. |
| [13] | LUO Y, XIAO L, ZHANG X. Characterization of TEOS/PDMS/HA nanocomposites for application as consolidant/hydrophobic products on sandstones[J]. Journal of Cultural Heritage, 2015, 16(4):470-478. |
| [14] | PENDNA A, PINHO L, FREDIANI P, et al. Obtaining SiO2-fluorinated PLA bionanocomposites with application as reversible and highly-hydrophobic coatings of buildings[J]. Progress in Organic Coatings, 2016, 90:91-100. |
| [15] | KUMAR D, WU X, FU Q, et al. Hydrophobic sol-gel coatings based on polydimethylsiloxane for self-cleaning applications[J]. Materials & Design, 2015, 86:855-862. |
| [16] | CALIA A, LETTIERI M, MASIERI M. Durability assessment of nanostructured TiO2 coatings applied on limestones to enhance building surface with self-cleaning ability[J]. Building and Environment, 2016, 110:1-10. |
| [17] | FACIO D S, MOSQUERA M J. Simple strategy for producing superhydrophobic nanocomposite coatings in situ on a building substrate[J]. ACS Applied Materials & Interfaces, 2013, 5(15):7517-7526. |
| [18] | PINHO L, ELHADDAD F, FACIO D S, et al. A novel TiO2-SiO2 nanocomposite converts a very friable stone into a self-cleaning building material[J]. Applied Surface Science, 2013, 275(7):389-396. |
| [19] | JIANG L, YANG B, LI T J, et al. Binary cooperative complementary nanoscale interfacial materials[J]. Pure & Applied Chemistry, 2000, 72(1-2):73-81. |
| [20] | WENZEL R N. Resistance of solid surface to wetting by water[J]. Industrial & Engineering Chemistry Research, 1936, 28(8):998-994. |
| [21] | ALTOMARE M, FANIZZA E, CORRICELLI M, et al. Patterned assembly of luminescent nanocrystals:Role of the molecular chemistry at the interface[J]. Journal of nanoparticle research, 2014, 16(7):2468. |
