CN109401059A - 一种太阳能电池封装膜及其制备方法 - Google Patents
一种太阳能电池封装膜及其制备方法 Download PDFInfo
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- CN109401059A CN109401059A CN201811352533.0A CN201811352533A CN109401059A CN 109401059 A CN109401059 A CN 109401059A CN 201811352533 A CN201811352533 A CN 201811352533A CN 109401059 A CN109401059 A CN 109401059A
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- Prior art keywords
- parts
- layer
- film
- polypropylene
- ethylene
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- 239000004408 titanium dioxide Substances 0.000 claims abstract description 35
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- IJVRPNIWWODHHA-UHFFFAOYSA-N 2-cyanoprop-2-enoic acid Chemical compound OC(=O)C(=C)C#N IJVRPNIWWODHHA-UHFFFAOYSA-N 0.000 claims description 8
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- BJELTSYBAHKXRW-UHFFFAOYSA-N 2,4,6-triallyloxy-1,3,5-triazine Chemical compound C=CCOC1=NC(OCC=C)=NC(OCC=C)=N1 BJELTSYBAHKXRW-UHFFFAOYSA-N 0.000 claims description 6
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- IUGYQRQAERSCNH-UHFFFAOYSA-N pivalic acid Chemical compound CC(C)(C)C(O)=O IUGYQRQAERSCNH-UHFFFAOYSA-N 0.000 claims description 3
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- OJMIONKXNSYLSR-UHFFFAOYSA-N phosphorous acid Chemical compound OP(O)O OJMIONKXNSYLSR-UHFFFAOYSA-N 0.000 claims description 2
- 238000003756 stirring Methods 0.000 claims description 2
- XBDQKXXYIPTUBI-UHFFFAOYSA-N dimethylselenoniopropionate Natural products CCC(O)=O XBDQKXXYIPTUBI-UHFFFAOYSA-N 0.000 claims 2
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- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 3
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- 125000003903 2-propenyl group Chemical group [H]C([*])([H])C([H])=C([H])[H] 0.000 description 2
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Classifications
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Abstract
本发明公开了一种太阳能电池封装膜,涉及电池封装膜领域,包括包括防水层和耐候层,耐候层设置于防水层的上层,所述防水层和耐候层之间采用胶水粘接;防水层为聚丙烯膜层,包括以下重量份计的原料:聚丙烯80‑100份、马来酸酐5‑10份、引发剂4‑8份、硬脂酸钙1‑3份、改性二氧化钛2‑5份和β晶成核剂1‑2份;耐候层为乙烯‑1‑辛烯共聚物膜层,包括以下重量份计的原料:乙烯‑1‑辛烯共聚物70‑80份、甲基丙烯酸甘油酯7‑13份、滑石粉2‑5份、抗氧剂0.8‑1.5份和交联剂0.8‑1.6份;本发明通过多层材料复合,改善封装膜的耐候性和防水性,提高了封装膜的耐久性。
Description
技术领域
本发明涉及太阳能电池封装膜领域,具体涉及一种太阳能电池封装膜及其制备方法。
背景技术
能源问题严重制约着当今社会的发展,太阳能、风能、地热能等的开发与利用,这是解决当今能源短缺问题的关键,在众多的可再生资源当中,太阳能在我国应用范围最广,太阳能用于光伏发电可以解决我国煤炭发电资源短缺的问题,同时可以减少环境污染,绿色环保。
太阳能电池前封装膜是一种用于取代太阳能电池玻璃的新型封装材料,是轻量化和柔性化太阳能电池组件的必要组成部分,太阳能电池组件在使用时直接暴露于大气环境中,其封装材料的耐候性和稳定性直接影响到太阳能电池组件的使用寿命,因此,太阳能电池封装膜除了要满足高光学透过率外,还应具有耐摩擦性能和高水气阻隔性能。
中国专利文件CN101582459A(CN200910053911.X)提供的一种以改性聚偏氟乙烯合金层为耐候保护层的太阳能电池背板,包括依次粘接的第一耐候层、第一粘接层、结构增强层、第二粘接层和第二耐候层,第一耐候层和第二耐候层均为聚偏氟乙烯与无机材料的共混塑料合金层,结构增强层是聚对苯二甲酸乙二醇酯层,第一粘接层和第二粘接层是聚氨酯胶层、聚丙烯酸酯胶层或环氧胶层。该方法制备的耐候层由于无机填料的加入,不能保持PVDF膜原有的优良性能,会降低PVDF膜的水蒸气透过率等性能。
中国专利CN102632668B公告了一种太阳能电池封装膜及其制备方法。该太阳能电池封装膜是在聚酯基层两侧通过涂布胶黏剂粘结层与耐候层复合,所述耐候层是通过将氟塑料、无机填料、功能助剂混合后挤出造粒,再通过流延或吹膜的方式制得的含氟薄膜;所述氟塑料为乙烯、四氟乙烯、六氟丙烯和1,2,2-三氟苯乙烯的共聚物。本发明的太阳能电池封装膜,性能优异,且该背板膜结构紧密,生产工序少,成本低。但是该发明封装膜大量使用含氟物质作为原料,含氟物质在生产中的废弃物不易处理,并且本身具有危害环境的缺点,使用不环保。
发明内容
针对现有技术中存在的问题,本发明提供了一种太阳能电池封装膜及其制备方法,本发明封装膜通过耐候层和防水层的复合作用,提高了材料的防水性和耐腐蚀性,同时具有良好的可见光透过率,该材料不易黄变,具有良好的加工性和易操作性,能更好地起到保护太阳能电池芯片的作用。
为了达到上述目的,本发明通过以下技术方案来实现的:
一种太阳能电池封装膜,包括防水层和耐候层,耐候层设置于防水层的上层,所述防水层和耐候层之间采用胶水粘接;
所述防水层为聚丙烯膜层,包括以下重量份计的原料:聚丙烯80-100份、马来酸酐5-10份、引发剂4-8份、硬脂酸钙1-3份、改性二氧化钛2-5份和β晶成核剂1-2份;
所述耐候层为乙烯-1-辛烯共聚物膜层,包括以下重量份计的原料:乙烯-1-辛烯共聚物70-80份、甲基丙烯酸甘油酯7-13份、滑石粉2-5份、抗氧剂0.8-1.5份和交联剂0.8-1.6份。
优选地,所述聚丙烯膜层包括以下重量份计的原料:聚丙烯92份、马来酸酐8份、引发剂5.8份、硬脂酸钙2份、改性二氧化钛3.5份和β晶成核剂1.6份。
优选地,所述乙烯-1-辛烯共聚物膜层包括以下重量份计的原料:乙烯-1-辛烯共聚物76份、甲基丙烯酸甘油酯11份、滑石粉3份、抗氧剂1.2份和交联剂1.2份。
优选地,所述改性二氧化钛的制备方法为:将二氧化钛置入球磨机中研磨过300-500目筛后,用15wt%的双氧水浸泡3-5小时,去离子水洗涤后,置入干燥箱中烘干,在其中加入相当于其重量1-2%的月桂醇硫酸钠、2-4%的α-氰基丙烯酸乙酯、1-2%的氯化石蜡、1-2%的三聚氰酸三烯丙酯,以3000-4000转/分钟的速度搅拌20-25分钟后,加入球磨机中继续研磨4-6小时,即得。
优选地,所述引发剂为过氧化二叔丁基、过氧化二异丙苯、过氧化苯甲酸叔丁酯和过氧化叔戊酸叔基丁酯中的一种或几种结合。
优选地,所述抗氧剂为β-((3,5-二叔丁基-4-羟基苯基)丙酸)季戊四醇酯、三(2,4-丁基苯酯)亚磷酸脂、亚磷酸三苯酯和季戊四醇双亚磷酸酯二(十八醇)酯中的一种或几种结合。
优选地,所述交联剂为乙烯基三乙氧基硅烷、二甲基丙烯酸乙二醇酯、三聚氰酸三烯丙酯和二月桂酸二丁基锡中的一种或几种结合。
本发明中还公开了一种上述太阳能电池封装膜的制备方法,具体地,包括以下步骤:
(1)按照上述原料重量份称取各组分;
(2)防水层的制备
(a1)将马来酸酐加热且不断搅拌,至其完全熔化成液体,过滤掉不溶物质,得液体马来酸酐;
(a2)将步骤(a1)制得的液体马来酸酐和聚丙烯、引发剂、硬脂酸钙改性二氧化钛和β晶成核剂加入高速高速混合机中混合5-10分钟后,加入拉伸流变机中,控制温度在180-220摄氏度下,进行熔融挤出,得聚丙烯混合熔体;
(a3)将聚丙烯混合熔体经延辊流延,冷却辊冷却,控制厚度在0.1-0.2毫米,聚丙烯薄膜初品;
(a4)将聚丙烯薄膜初品在150-170摄氏度下热定1-8秒,冷却收卷,得聚丙烯膜层;
(3)耐候层的制备
(b1)将密炼机升温至90摄氏度,加入乙烯-1-辛烯共聚物,密炼3分钟后,加入甲基丙烯酸甘油酯和交联剂后,继续密炼4-6分钟,加入抗氧剂和滑石粉,混合2分钟后出料;
(b2)将步骤(b1)制得的混合料常温下用开放式炼塑机开炼30-40分钟;
(b3)将平板硫化仪升温到140-150摄氏度,将步骤(b2)的开炼料放入模具上,预热1-2分钟,热压25分钟,冷压10分钟,即得所述乙烯-1-辛烯共聚物膜层。
(4)封装膜的制备
(c1)用电晕处理机处理聚丙烯薄膜层,利用涂膜丝棒将胶水均匀徒步在聚丙烯膜层上,使用覆膜机将乙烯-1-辛烯共聚物膜层平覆在聚丙烯膜层,得复合膜;
(c2)将步骤(c1)制得的复合膜放置在90摄氏度下,干燥120-180分钟,即得太阳能电池封装膜。
优选地,所述步骤(b3)中平板硫化仪的压强设定为11700-11800千帕。
优选地,所述步骤(c1)中的胶水为乙烯基三胺:酰胺基胺类:乙酸乙酯按照质量比11:9:20混合组成。
本发明具有如下的有益效果:
(1)本发明封装膜通过耐候层和防水层的复合作用,提高了材料的防水性和耐腐蚀性,同时具有良好的可见光透过率,该材料不易黄变,具有良好的加工性和易操作性,能更好地起到保护太阳能电池芯片的作用。
(2)本发明防水层为聚丙烯、马来酸酐、引发剂、硬脂酸钙、改性二氧化钛和β晶成核剂几种物质复合作用制备而成,具有良好的透明性和阻隔水气的作用,同时通过马来酸酐、引发剂和β晶成核剂与聚丙烯作用,可以提高聚丙烯的柔韧性,抗拉伸性和成膜性,添加适量的改性纳米二氧化钛,可以提高材料的抗紫外性和耐磨耐候性。
(3)本发明通过在防水层上覆盖一层耐候层,可以有效提高防水层的耐久性,耐候层为乙烯-1-辛烯共聚物、甲基丙烯酸甘油酯、滑石粉、抗氧剂和交联剂几种物质协配制备,乙烯-1-辛烯共聚物作为耐候层的基体具有可见光透光率高和不易黄变的优点,覆盖在聚丙烯防水层上,减少了防水层的黄变作用,提高了太阳能电池的光电转化率。
(4)耐候层中的甲基丙烯酸甘油酯和交联剂与乙烯-1-辛烯共聚物的复合作用,有效提高乙烯-1-辛烯共聚物的交联度,从而提高耐候层材料的柔韧性、抗拉伸性和耐高温性能。
(5)本发明制备方法中首先将马来酸酐加热溶解后与聚丙烯等其他物质在混合熔融挤出,液体马来酸酐具有良好的流动性,易混合均匀,提高了马来酸酐与聚丙烯的接枝率。
(6)本发明使用月桂醇硫酸钠、α-氰基丙烯酸乙酯、氯化石蜡和三聚氰酸三烯丙酯与二氧化钛混合研磨,改性二氧化钛的表面活性,增强二氧化钛与有机聚合物的相容性和界面结合力,提高膜层的力学性能。
具体实施方式
下面结合实施例对本发明的具体实施方式作进一步描述,以下实施例仅用于更加清楚地说明本发明的技术方案,而不能以此来限制本发明的保护范围。
实施例1
一种太阳能电池封装膜,包括防水层和耐候层,耐候层设置于防水层的上层,所述防水层和耐候层之间采用胶水粘接;
防水层为聚丙烯膜层,包括以下重量份计的原料:聚丙烯80份、马来酸酐5份、引发剂4份、硬脂酸钙1份、改性二氧化钛2份和β晶成核剂1份;
耐候层为乙烯-1-辛烯共聚物膜层,包括以下重量份计的原料:乙烯-1-辛烯共聚物70份、甲基丙烯酸甘油酯7份、滑石粉2份、抗氧剂0.8份和交联剂0.8份。
改性二氧化钛的制备方法为:将二氧化钛置入球磨机中研磨过300目筛后,用15wt%的双氧水浸泡3小时,去离子水洗涤后,置入干燥箱中烘干,在其中加入相当于其重量1%的月桂醇硫酸钠、2%的α-氰基丙烯酸乙酯、1%的氯化石蜡、1%的三聚氰酸三烯丙酯,以3000转/分钟的速度搅拌20分钟后,加入球磨机中继续研磨4小时,即得。
引发剂为过氧化二叔丁基。
抗氧剂为β-((3,5-二叔丁基-4-羟基苯基)丙酸)季戊四醇酯。
交联剂为乙烯基三乙氧基硅烷。
本实施例中的太阳能电池封装膜的制备方法,具体地,包括以下步骤:
(1)按照上述原料重量份称取各组分;
(2)防水层的制备
(a1)将马来酸酐加热且不断搅拌,至其完全熔化成液体,过滤掉不溶物质,得液体马来酸酐;
(a2)将步骤(a1)制得的液体马来酸酐和聚丙烯、引发剂、硬脂酸钙改性二氧化钛和β晶成核剂加入高速高速混合机中混合5分钟后,加入拉伸流变机中,控制温度在180摄氏度下,进行熔融挤出,得聚丙烯混合熔体;
(a3)将聚丙烯混合熔体经延辊流延,冷却辊冷却,控制厚度在0.1毫米,聚丙烯薄膜初品;
(a4)将聚丙烯薄膜初品在150摄氏度下热定1秒,冷却收卷,得聚丙烯膜层;
(3)耐候层的制备
(b1)将密炼机升温至90摄氏度,加入乙烯-1-辛烯共聚物,密炼3分钟后,加入甲基丙烯酸甘油酯和交联剂后,继续密炼4分钟,加入抗氧剂和滑石粉,混合2分钟后出料;
(b2)将步骤(b1)制得的混合料常温下用开放式炼塑机开炼30分钟;
(b3)将平板硫化仪升温到140摄氏度,将步骤(b2)的开炼料放入模具上,预热1分钟,热压25分钟,冷压10分钟,即得所述乙烯-1-辛烯共聚物膜层。
(4)封装膜的制备
(c1)用电晕处理机处理聚丙烯薄膜层,利用涂膜丝棒将胶水均匀徒步在聚丙烯膜层上,使用覆膜机将乙烯-1-辛烯共聚物膜层平覆在聚丙烯膜层,得复合膜;
(c2)将步骤(c1)制得的复合膜放置在90摄氏度下,干燥120分钟,即得太阳能电池封装膜。
步骤(b3)中平板硫化仪的压强设定为11700-11800千帕。
步骤(c1)中的胶水为乙烯基三胺:酰胺基胺类:乙酸乙酯按照质量比11:9:20混合组成。
实施例2
一种太阳能电池封装膜,包括防水层和耐候层,耐候层设置于防水层的上层,所述防水层和耐候层之间采用胶水粘接;
防水层为聚丙烯膜层,包括以下重量份计的原料:聚丙烯100份、马来酸酐10份、引发剂8份、硬脂酸钙3份、改性二氧化钛5份和β晶成核剂2份;
耐候层为乙烯-1-辛烯共聚物膜层,包括以下重量份计的原料:乙烯-1-辛烯共聚物80份、甲基丙烯酸甘油酯13份、滑石粉5份、抗氧剂1.5份和交联剂1.6份。
改性二氧化钛的制备方法为:将二氧化钛置入球磨机中研磨过500目筛后,用15wt%的双氧水浸泡5小时,去离子水洗涤后,置入干燥箱中烘干,在其中加入相当于其重量2%的月桂醇硫酸钠、4%的α-氰基丙烯酸乙酯、2%的氯化石蜡、2%的三聚氰酸三烯丙酯,以4000转/分钟的速度搅拌25分钟后,加入球磨机中继续研磨6小时,即得。
引发剂为过氧化二异丙苯。
抗氧剂为三(2,4-丁基苯酯)亚磷酸脂。
交联剂为二甲基丙烯酸乙二醇酯。
本实施例中的太阳能电池封装膜的制备方法,具体地,包括以下步骤:
(1)按照上述原料重量份称取各组分;
(2)防水层的制备
(a1)将马来酸酐加热且不断搅拌,至其完全熔化成液体,过滤掉不溶物质,得液体马来酸酐;
(a2)将步骤(a1)制得的液体马来酸酐和聚丙烯、引发剂、硬脂酸钙改性二氧化钛和β晶成核剂加入高速高速混合机中混合10分钟后,加入拉伸流变机中,控制温度在220摄氏度下,进行熔融挤出,得聚丙烯混合熔体;
(a3)将聚丙烯混合熔体经延辊流延,冷却辊冷却,控制厚度在0.2毫米,聚丙烯薄膜初品;
(a4)将聚丙烯薄膜初品在170摄氏度下热定8秒,冷却收卷,得聚丙烯膜层;
(3)耐候层的制备
(b1)将密炼机升温至90摄氏度,加入乙烯-1-辛烯共聚物,密炼3分钟后,加入甲基丙烯酸甘油酯和交联剂后,继续密炼6分钟,加入抗氧剂和滑石粉,混合2分钟后出料;
(b2)将步骤(b1)制得的混合料常温下用开放式炼塑机开炼30-40分钟;
(b3)将平板硫化仪升温到150摄氏度,将步骤(b2)的开炼料放入模具上,预热2分钟,热压25分钟,冷压10分钟,即得所述乙烯-1-辛烯共聚物膜层。
(4)封装膜的制备
(c1)用电晕处理机处理聚丙烯薄膜层,利用涂膜丝棒将胶水均匀徒步在聚丙烯膜层上,使用覆膜机将乙烯-1-辛烯共聚物膜层平覆在聚丙烯膜层,得复合膜;
(c2)将步骤(c1)制得的复合膜放置在90摄氏度下,干燥180分钟,即得太阳能电池封装膜。
步骤(b3)中平板硫化仪的压强设定为11800千帕。
步骤(c1)中的胶水为乙烯基三胺:酰胺基胺类:乙酸乙酯按照质量比11:9:20混合组成。
实施例3
一种太阳能电池封装膜,包括防水层和耐候层,耐候层设置于防水层的上层,所述防水层和耐候层之间采用胶水粘接;
防水层为聚丙烯膜层,包括以下重量份计的原料:聚丙烯92份、马来酸酐8份、引发剂5.8份、硬脂酸钙2份、改性二氧化钛3.5份和β晶成核剂1.6份;
耐候层为乙烯-1-辛烯共聚物膜层,包括以下重量份计的原料:乙烯-1-辛烯共聚物76份、甲基丙烯酸甘油酯11份、滑石粉3份、抗氧剂1.2份和交联剂1.2份。
改性二氧化钛的制备方法为:将二氧化钛置入球磨机中研磨过400目筛后,用15wt%的双氧水浸泡4小时,去离子水洗涤后,置入干燥箱中烘干,在其中加入相当于其重量1.6%的月桂醇硫酸钠、3%的α-氰基丙烯酸乙酯、1.5%的氯化石蜡、1.4%的三聚氰酸三烯丙酯,以3600转/分钟的速度搅拌23分钟后,加入球磨机中继续研磨5小时,即得。
引发剂为过氧化苯甲酸叔丁酯。
抗氧剂为亚磷酸三苯酯。
交联剂为三聚氰酸三烯丙酯。
本实施例中的太阳能电池封装膜的制备方法,具体地,包括以下步骤:
(1)按照上述原料重量份称取各组分;
(2)防水层的制备
(a1)将马来酸酐加热且不断搅拌,至其完全熔化成液体,过滤掉不溶物质,得液体马来酸酐;
(a2)将步骤(a1)制得的液体马来酸酐和聚丙烯、引发剂、硬脂酸钙改性二氧化钛和β晶成核剂加入高速高速混合机中混合8分钟后,加入拉伸流变机中,控制温度在200摄氏度下,进行熔融挤出,得聚丙烯混合熔体;
(a3)将聚丙烯混合熔体经延辊流延,冷却辊冷却,控制厚度在0.15毫米,聚丙烯薄膜初品;
(a4)将聚丙烯薄膜初品在160摄氏度下热定6秒,冷却收卷,得聚丙烯膜层;
(3)耐候层的制备
(b1)将密炼机升温至90摄氏度,加入乙烯-1-辛烯共聚物,密炼3分钟后,加入甲基丙烯酸甘油酯和交联剂后,继续密炼5分钟,加入抗氧剂和滑石粉,混合2分钟后出料;
(b2)将步骤(b1)制得的混合料常温下用开放式炼塑机开炼35分钟;
(b3)将平板硫化仪升温到146摄氏度,将步骤(b2)的开炼料放入模具上,预热1.5分钟,热压25分钟,冷压10分钟,即得所述乙烯-1-辛烯共聚物膜层。
(4)封装膜的制备
(c1)用电晕处理机处理聚丙烯薄膜层,利用涂膜丝棒将胶水均匀徒步在聚丙烯膜层上,使用覆膜机将乙烯-1-辛烯共聚物膜层平覆在聚丙烯膜层,得复合膜;
(c2)将步骤(c1)制得的复合膜放置在90摄氏度下,干燥160分钟,即得太阳能电池封装膜。
步骤(b3)中平板硫化仪的压强设定为11750千帕。
步骤(c1)中的胶水为乙烯基三胺:酰胺基胺类:乙酸乙酯按照质量比11:9:20混合组成。
实施例4
一种太阳能电池封装膜,包括防水层和耐候层,耐候层设置于防水层的上层,所述防水层和耐候层之间采用胶水粘接;
防水层为聚丙烯膜层,包括以下重量份计的原料:聚丙烯88份、马来酸酐6份、引发剂7份、硬脂酸钙2.4份、改性二氧化钛4份和β晶成核剂1.2份;
耐候层为乙烯-1-辛烯共聚物膜层,包括以下重量份计的原料:乙烯-1-辛烯共聚物74份、甲基丙烯酸甘油酯12份、滑石粉3.8份、抗氧剂1.4份和交联剂1.5份。
改性二氧化钛的制备方法为:将二氧化钛置入球磨机中研磨过350目筛后,用15wt%的双氧水浸泡4.5小时,去离子水洗涤后,置入干燥箱中烘干,在其中加入相当于其重量1.2%的月桂醇硫酸钠、2.8%的α-氰基丙烯酸乙酯、1.4%的氯化石蜡、1.8%的三聚氰酸三烯丙酯,以3800转/分钟的速度搅拌23分钟后,加入球磨机中继续研磨5小时,即得。
引发剂为过氧化叔戊酸叔基丁酯。
抗氧剂为季戊四醇双亚磷酸酯二(十八醇)酯。
交联剂为二月桂酸二丁基锡。
本实施例中的太阳能电池封装膜的制备方法,具体地,包括以下步骤:
(1)按照上述原料重量份称取各组分;
(2)防水层的制备
(a1)将马来酸酐加热且不断搅拌,至其完全熔化成液体,过滤掉不溶物质,得液体马来酸酐;
(a2)将步骤(a1)制得的液体马来酸酐和聚丙烯、引发剂、硬脂酸钙改性二氧化钛和β晶成核剂加入高速高速混合机中混合8分钟后,加入拉伸流变机中,控制温度在195摄氏度下,进行熔融挤出,得聚丙烯混合熔体;
(a3)将聚丙烯混合熔体经延辊流延,冷却辊冷却,控制厚度在0.13毫米,聚丙烯薄膜初品;
(a4)将聚丙烯薄膜初品在150-170摄氏度下热定4秒,冷却收卷,得聚丙烯膜层;
(3)耐候层的制备
(b1)将密炼机升温至90摄氏度,加入乙烯-1-辛烯共聚物,密炼3分钟后,加入甲基丙烯酸甘油酯和交联剂后,继续密炼5分钟,加入抗氧剂和滑石粉,混合2分钟后出料;
(b2)将步骤(b1)制得的混合料常温下用开放式炼塑机开炼38分钟;
(b3)将平板硫化仪升温到144摄氏度,将步骤(b2)的开炼料放入模具上,预热1.6分钟,热压25分钟,冷压10分钟,即得所述乙烯-1-辛烯共聚物膜层。
(4)封装膜的制备
(c1)用电晕处理机处理聚丙烯薄膜层,利用涂膜丝棒将胶水均匀徒步在聚丙烯膜层上,使用覆膜机将乙烯-1-辛烯共聚物膜层平覆在聚丙烯膜层,得复合膜;
(c2)将步骤(c1)制得的复合膜放置在90摄氏度下,干燥165分钟,即得太阳能电池封装膜。
步骤(b3)中平板硫化仪的压强设定为11780千帕。
步骤(c1)中的胶水为乙烯基三胺:酰胺基胺类:乙酸乙酯按照质量比11:9:20混合组成。
对比例1:仅使用实施例1中的聚丙烯膜层作为封装膜;
对比例2:仅使用实施例中的乙烯-1-辛烯共聚物膜层作为封装膜;
对比例3:去除防水层中的马来酸酐材料,其余原料及制备方法和实施例1相同;
对比例4:去除耐候层中的甲基丙烯酸甘油酯,其余原料及之别方法与实施例1相同;
对比例5:制备方法中,省去将马来酸酐溶解的步骤,直接将其添加混合,其余原料和制备方法与实施例1相同;
将实施例1-4制得的太阳能电池封装膜和对比例1-5制得的封装膜进行性能测试,测试结果如表1;
表1
分析上表1数据
对比实施例1和对比例1的数据,可以看出实施例1相对于对比例1的水气透过率降低了61.54%,黄变率降低了77.78%,短路电压提高了78.79%,紫外光照剂量为100kWh/m2时,断裂伸长率保持率提高了73.59%,说明本发明中的太阳能电封装膜相对于纯聚丙烯膜层作为封装膜具有良好的阻隔水气性能和抗黄变性能,透光率高,绝缘性和耐候性提高。
对比实施例1和对比例2的数据,可以看出实施例1相对于对比例2的水气透过率降低了70.59%,黄变率降低了63.64%,短路电压提高了49.37%,紫外光照剂量为100kWh/m2时,断裂伸长率保持率提高了35.30%,说明本发明中的太阳能电封装膜相对于纯乙烯-1-辛烯共聚物膜层作为封装膜具有良好的阻隔水气性能和抗黄变性能,透光率高,绝缘性和耐候性提高。
分别将实施例1的数据与对比例3、对比例4的数据进行对比,可以看出,在封装膜中添加甲基丙烯酸甘油酯和马来酸酐,对封装膜的综合力学性能和耐候性有着明显的改善。
对比实施例1和对比例5的数据可以看出,制备方法中将马来酸酐溶解添加到混合物中相比直接将马来酸酐直接添加到混合物中,溶解后在于其他组分共混熔融,可以有效提高封装膜的综合性能。
综上所述,本发明具有以下优点:
(1)本发明封装膜通过耐候层和防水层的复合作用,提高了材料的防水性和耐腐蚀性,同时具有良好的可见光透过率,该材料不易黄变,具有良好的加工性和易操作性,能更好地起到保护太阳能电池芯片的作用。
(2)本发明防水层为聚丙烯、马来酸酐、引发剂、硬脂酸钙、改性二氧化钛和β晶成核剂几种物质复合作用制备而成,具有良好的透明性和阻隔水气的作用,同时通过马来酸酐、引发剂和β晶成核剂与聚丙烯作用,可以提高聚丙烯的柔韧性,抗拉伸性和成膜性,添加适量的改性纳米二氧化钛,可以提高材料的抗紫外性和耐磨耐候性。
(3)本发明通过在防水层上覆盖一层耐候层,可以有效提高防水层的耐久性,耐候层为乙烯-1-辛烯共聚物、甲基丙烯酸甘油酯、滑石粉、抗氧剂和交联剂几种物质协配制备,乙烯-1-辛烯共聚物作为耐候层的基体具有可见光透光率高和不易黄变的优点,覆盖在聚丙烯防水层上,减少了防水层的黄变作用,提高了太阳能电池的光电转化率。
(4)耐候层中的甲基丙烯酸甘油酯和交联剂与乙烯-1-辛烯共聚物的复合作用,有效提高乙烯-1-辛烯共聚物的交联度,从而提高耐候层材料的柔韧性、抗拉伸性和耐高温性能。
(5)本发明制备方法中首先将马来酸酐加热溶解后与聚丙烯等其他物质在混合熔融挤出,液体马来酸酐具有良好的流动性,易混合均匀,提高了马来酸酐与聚丙烯的接枝率。
(6)本发明使用月桂醇硫酸钠、α-氰基丙烯酸乙酯、氯化石蜡和三聚氰酸三烯丙酯与二氧化钛混合研磨,改性二氧化钛的表面活性,增强二氧化钛与有机聚合物的相容性和界面结合力,提高膜层的力学性能。
以上所述仅为本发明的优选实施例而已,并不用于限制本发明,尽管参照前述实施例对本发明进行了详细的说明,对于本领域的技术人员来说,其依然可以对前述各实施例所记载的技术方案进行修改,或者对其中部分技术特征进行等同替换。凡在本发明的精神和原则之内,所作的任何修改、等同替换、改进等,均应包含在本发明的保护范围之内。
Claims (10)
1.一种太阳能电池封装膜,其特征在于,包括防水层和耐候层,耐候层设置于防水层的上层,所述防水层和耐候层之间采用胶水粘接;
所述防水层为聚丙烯膜层,包括以下重量份计的原料:聚丙烯80-100份、马来酸酐5-10份、引发剂4-8份、硬脂酸钙1-3份、改性二氧化钛2-5份和β晶成核剂1-2份;
所述耐候层为乙烯-1-辛烯共聚物膜层,包括以下重量份计的原料:乙烯-1-辛烯共聚物70-80份、甲基丙烯酸甘油酯7-13份、滑石粉2-5份、抗氧剂0.8-1.5份和交联剂0.8-1.6份。
2.根据权利要求1所述的太阳能电池封装膜,其特征在于,所述聚丙烯膜层包括以下重量份计的原料:聚丙烯92份、马来酸酐8份、引发剂5.8份、硬脂酸钙2份、改性二氧化钛3.5份和β晶成核剂1.6份。
3.根据权利要求1所述的太阳能电池封装膜,其特征在于,所述乙烯-1-辛烯共聚物膜层包括以下重量份计的原料:乙烯-1-辛烯共聚物76份、甲基丙烯酸甘油酯11份、滑石粉3份、抗氧剂1.2份和交联剂1.2份。
4.根据权利要求1所述的太阳能电池封装膜,其特征在于,所述改性二氧化钛的制备方法为:将二氧化钛置入球磨机中研磨过300-500目筛后,用15wt%的双氧水浸泡3-5小时,去离子水洗涤后,置入干燥箱中烘干,在其中加入相当于其重量1-2%的月桂醇硫酸钠、2-4%的α-氰基丙烯酸乙酯、1-2%的氯化石蜡、1-2%的三聚氰酸三烯丙酯,以3000-4000转/分钟的速度搅拌20-25分钟后,加入球磨机中继续研磨4-6小时,即得。
5.根据权利要求1所述的太阳能电池封装膜,其特征在于,所述引发剂为过氧化二叔丁基、过氧化二异丙苯、过氧化苯甲酸叔丁酯和过氧化叔戊酸叔基丁酯中的一种或几种结合。
6.根据权利要求1所述的太阳能电池封装膜,其特征在于,所述抗氧剂为β-((3,5-二叔丁基-4-羟基苯基)丙酸)季戊四醇酯、三(2,4-丁基苯酯)亚磷酸脂、亚磷酸三苯酯和季戊四醇双亚磷酸酯二(十八醇)酯中的一种或几种结合。
7.根据权利要求1所述的太阳能电池封装膜,其特征在于,所述交联剂为乙烯基三乙氧基硅烷、二甲基丙烯酸乙二醇酯、三聚氰酸三烯丙酯和二月桂酸二丁基锡中的一种或几种结合。
8.一种如权利要求1-7任一项所述的太阳能电池封装膜的制备方法,其特征在于,包括以下步骤:
(1)按照上述原料重量份称取各组分;
(2)防水层的制备
(a1)将马来酸酐加热且不断搅拌,至其完全熔化成液体,过滤掉不溶物质,得液体马来酸酐;
(a2)将步骤(a1)制得的液体马来酸酐和聚丙烯、引发剂、硬脂酸钙改性二氧化钛和β晶成核剂加入高速高速混合机中混合5-10分钟后,加入拉伸流变机中,控制温度在180-220摄氏度下,进行熔融挤出,得聚丙烯混合熔体;
(a3)将聚丙烯混合熔体经延辊流延,冷却辊冷却,控制厚度在0.1-0.2毫米,聚丙烯薄膜初品;
(a4)将聚丙烯薄膜初品在150-170摄氏度下热定1-8秒,冷却收卷,得聚丙烯膜层;
(3)耐候层的制备
(b1)将密炼机升温至90摄氏度,加入乙烯-1-辛烯共聚物,密炼3分钟后,加入甲基丙烯酸甘油酯和交联剂后,继续密炼4-6分钟,加入抗氧剂和滑石粉,混合2分钟后出料;
(b2)将步骤(b1)制得的混合料常温下用开放式炼塑机开炼30-40分钟;
(b3)将平板硫化仪升温到140-150摄氏度,将步骤(b2)的开炼料放入模具上,预热1-2分钟,热压25分钟,冷压10分钟,即得所述乙烯-1-辛烯共聚物膜层。
(4)封装膜的制备
(c1)用电晕处理机处理聚丙烯薄膜层,利用涂膜丝棒将胶水均匀徒步在聚丙烯膜层上,使用覆膜机将乙烯-1-辛烯共聚物膜层平覆在聚丙烯膜层,得复合膜;
(c2)将步骤(c1)制得的复合膜放置在90摄氏度下,干燥120-180分钟,即得太阳能电池封装膜。
9.根据权利要求8所述的太阳能电池封装膜的制备方法,其特征在于,所述步骤(b3)中平板硫化仪的压强设定为11700-11800千帕。
10.根据权利要求8所述的太阳能电池封装膜的制备方法,其特征在于,所述步骤(c1)中的胶水为乙烯基三胺:酰胺基胺类:乙酸乙酯按照质量比11:9:20混合组成。
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