Silica aerogel-poly(ethylene-co-vinyl acetate) composite for transparent heat retention films
Silica aerogel-poly(ethylene-co-vinyl acetate) composite for transparent heat retention films
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DOI：
10.1002/polb.23509
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发表时间：
2014-07
期刊：
影响因子：
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通讯作者：
J. M. Allan;Abdul Mumin;J. A. Wood;William Z. Xu;Wei Wu;P. Charpentier
中科院分区：
文献类型：
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作者：
J. M. Allan;Abdul Mumin;J. A. Wood;William Z. Xu;Wei Wu;P. Charpentier
聚（乙烯-共-乙酸乙烯酯）（伊娃）塑料膜广泛用于太阳能覆盖物，包括光伏模块和商业温室膜，但在控制热流方面较差。在这项工作中，二氧化硅气凝胶（SA）纳米凝胶被检查用于制备透明的热保持伊娃薄膜，阻挡远红外光谱辐射以保持热量，而不损害薄膜的光学性能。将SA纳米凝胶与伊娃颗粒在微型双螺杆挤出机中熔融混合形成SA/伊娃复合材料，并将其压制成厚度可控的薄膜。复合膜的光学性能进行了表征，使用各种分析方法，包括FTIR，紫外-维斯光谱，电子，共聚焦，和原子力显微镜。测定了工业和实验用SA/伊娃复合膜的导热系数和导热系数。结果表明，SA/伊娃膜与商业热塑料膜相比具有改善的红外保留，而不损害可见光透射，显示了这种方法在下一代热保留膜中的潜力。V C 2014 Wiley Periodicals，Inc. J.波利姆科学，部分B：聚合物2014，52，927-935
Poly(ethylene-co-vinyl acetate) (EVA) plastic films are widely used for solar coverings including photovoltaic modules and commercial greenhouse films, but are poor at controlling heat flow. In this work, silica aerogel (SA) nanogels were examined for preparing transparent heat retention EVA films that block far infrared spectra radiation to maintain heat, without compromising the optical performance of the films. SA nanogels were melt-mixed using a mini twin-screw extruder with EVA pellets to form SA/EVA composite, which were pressed into thin films with controlled thickness. The composite films were characterized in terms of optical proper- ties using a variety of analytical methods including FTIR, UV- Vis spectroscopy, electron, confocal, and atomic force micros- copy. Both thermicity and thermal conductivity of commercial and experimental SA/EVA films were measured. The results demonstrated that the SA/EVA films gave improved infrared retention compared to commercial thermal plastic films with- out compromising visible light transmission, showing the potential for this approach in next generation heat retention films. V C 2014 Wiley Periodicals, Inc. J. Polym. Sci., Part B: Polym. Phys. 2014, 52, 927-935