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摘要
为比较涂覆型含氟背板和复合型含氟背板耐候性优劣,选择3种有代表性的含氟背板,通过紫外、湿热、高加速湿热(HAST)老化实验,考察黄变指数、层间附着力、表面及截面微观结构变化,结果表明,背板A在紫外、湿热、HAST后的ΔYI、层间附着力都优于背板B和背板C;背板A、背板C的ΔYI随湿热时间延长而增大,背板B反之;SEM表明,背板B在紫外后表面颗粒明显增多,在湿热和HAST后,整体结构出现脱层,含氟层表面颗粒数量增多、粒径增大,含氟层内部孔隙明显,PET层出现脆裂。
Abstract
In order to contrast the weathering resistance of backsheet using fluorocarbon coating and the traditional fluorocarbon backsheet,three products were selected to investigate the yellowing index,the adhesion between layers,the appearance of surfaces and cross-sections by UV test,damp heat test,highly-accelerated temperature & humidity stress test(HAST).The results indicated that backsheet A had the best performance.ΔYI of backsheet A and backsheet C increased over time in damp heat test.While,backsheet B performed opposite.SEM showed that the amount of particles in surface of backsheet B significantly increased after UV test.After damp heat test and HAST,the whole structure of backsheet B appeared delamination.PET layer appeared brittle fracture,the number and diameter of particles rised at the surface of PVF layer,the amount of pores also rised inside.
关键词
光伏背板
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含氟背板
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湿热
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紫外
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高加速湿热
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耐候性
Key words
PV backsheet
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fluorocarbon backsheet
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damp heat test
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UV test
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highly-accelerated temperature & humidity stress test
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weatherability
含氟光伏背板耐候性研究[J].
化工新型材料, 2017, 45(9): 186-189 DOI:
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基金资助
国家科技支撑计划(2014BAE12B0103);浙江省教育厅科研项目资助(Y201431963)
