Applications of Polymer-Matrix Composites in the Greenhouse

• Main Authors: Yu-Chen Pan, 潘羽晨
• Other Authors: Maw-Tien Lee
• Format: Others
• Language: zh-TW
• Online Access: http://ndltd.ncl.edu.tw/handle/43k9sj

碩士 === 國立嘉義大學 === 應用化學系研究所 === 105 === In Taiwan, the weather in summer is hot, and the temperature in the greenhouse is too high for farming. Because the infrared radiation (IR) that will result in the elevation of the temperature of the greenhouse accounts for about 50% of the total radiation, blocking IR will be able to achieve the effect of cooling. In this study, we attempt to improve the greenhouse covering material to reduce the transmittance of IR and keep a suitable amount of visible light to achieve a lower temperature in the greenhouse. A polymer-matrix composite consisting of ethylene-vinyl acetate copolymer (EVA) and inorganic oxides was developed for the purpose. A UV-VIS spectrometer was used to measure the transmittance and the reflection of visible and near-infrared (NIR) through the composite cladding for adjusting the ratio of the additives. The surface morphology of the cladding was scanned with an atomic force microscope (AFM), and the dispersion of the additives in the composite was observed using a scanning electron microscope (SEM). Experimental results showed that for the same model greenhouse, the cladding developed in this study could achieve a 2~3℃ cooling effect in comparison with that of the traditional low density polyethylene (LDPE) film.