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Synergistic effect of (3-Aminopropyl)Trimethoxysilane treated ZnO and corundum nanoparticles under UV-irradiation on UV-cutoff and IR-absorption spectra of acrylic polyurethane based nanocomposite coating
Polymer Degradation and Stability ( IF 6.3 ) Pub Date : 2018-11-09 , DOI: 10.1016/j.polymdegradstab.2018.11.009
Mhd Abd Cader Mhd Haniffa , Yern Chee Ching , Cheng Hock Chuah , Kuan Yong Ching , Nai-Shang Liou

ZnO and corundum (α–Al2O3) nanoparticles were successfully synthesized by aqueous precipitation and sintering techniques respectively. ZnO nanoparticles were effectively coated with (3-aminopropyl)trimethoxysilane (APTMS) by polycondensation method to prevent the photocatalytic activity of ZnO during a UV-weathering study. X-ray diffractogram and FTIR were used to confirm the crystalline structure of as prepared nanoparticles, blue shift of the AlO bond and the formation of a secondary amine via polycondensation of APTMS over ZnO surface. The prepared APTMS-ZnO, corundum and commercially available surface modified hydrophobic SiO2 (M − SiO2) nanoparticles were used to prepare the acrylic polyurethane (AP: Poly-Macrynal® SM 510 N coating resign) bases nanocomposite coating on a polyurethane substrate. Individual and mixed nanoparticles were dispersed into acrylic polyurethane to prepare the coating layer on polyurethane film substrate separately. IR-active and UV–visible regions of the FTIR and UV–Vis spectroscopies were used to investigate the synergistic effect of the nanoparticles on a selected range of the radiative spectrum, especially the UV-resistant and IR-absorption properties of the coated films with and without exposure of UV-irradiations. Polyurethane substrate coated with APTMS-ZnO (2 wt%) based acrylic polyurethane-based nanocomposite coating (APUC) layer containing 2 wt% corundum (D50) and 6 wt% M − SiO2 (F50) exhibited 98.77% and 97.60% of UV-resistant property respectively. These results indicate that the visible light transparency and transmittance ability reduced significantly after 500 h of UV-irradiation exposure. Both of the activity and deformation have great impact on the IR-absorption property of the APUC.



中文翻译:

(3-氨基丙基)三甲氧基硅烷处理的ZnO和刚玉纳米粒子在紫外线下的协同作用对丙烯酸聚氨酯基纳米复合涂料的紫外线截止和红外吸收光谱的影响

ZnO和刚玉(α–Al 2 O 3)纳米粒子分别通过水相沉淀法和烧结技术成功合成。ZnO纳米粒子通过缩聚法有效地被(3-氨丙基)三甲氧基硅烷(APTMS)包覆,以防止ZnO在紫外线风化研究中的光催化活性。X射线衍射图和FTIR用于确认所制备的纳米颗粒的晶体结构,Al O键的蓝移以及通过APTMS在ZnO表面上的缩聚而形成的仲胺。制备的APTMS-ZnO,刚玉和可商购的表面改性疏水性SiO 2(M-SiO 2)纳米颗粒用于制备丙烯酸聚氨酯(AP:聚甲基丙烯酸甲酯)® SM 510 N涂层辞职)碱基纳米复合材料涂层的聚氨酯基底上。将单独的和混合的纳米颗粒分散在丙烯酸聚氨酯中以分别在聚氨酯膜基材上制备涂层。使用FTIR和UV-Vis光谱仪的IR活性区和UV可见区来研究纳米粒子在选定的辐射光谱范围内的协同效应,尤其是涂层膜的抗UV和IR吸收特性。并且不暴露于紫外线辐射。涂有APTMS-ZnO(2 wt%)的丙烯酸丙烯酸酯基纳米复合涂层(APUC)层的聚氨酯基材,其中包含2 wt%的刚玉(D50)和6 wt%的M-SiO 2(F50)分别表现出98.77%和97.60%的抗紫外线性能。这些结果表明,暴露于紫外线照射500小时后,可见光的透明度和透射能力显着降低。活性和变形都对APUC的IR吸收性能有很大影响。

更新日期:2018-11-09
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