光伏背板用PET老化性能研究

利用湿热老化、热氧老化对PET及使用该PET为基材的光伏背板进行处理,测定了老化后PET及背板的力学性能,并利用红外、DSC、粘度测试等分析方法研究了PET在上述老化过程中官能团、结晶度、分子量以及断裂伸长率的变化情况,并探讨了这些物性的变化与PET微观结构变化之间的联系.     

高压加速与恒温恒湿试验对光伏背板性能衰减的关联性探究

选取型号为KPO的光伏背板,对背板进行高压加速老化与恒温恒湿老化两种不同类型的湿热老化试验并探究了光伏背板中起主要支撑作用的聚酯薄膜的湿热老化机理以及物理化学变化,建立起加速湿热老化试验与恒温恒湿湿热老化试验间量化的对应关系,推进了加速湿热老化试验在背板领域对于耐湿热老化性能评估的标准化使用。     

不同老化模式对光伏背板中PET结晶度的影响

分别研究了在湿热老化、加速湿热老化、紫外辐照老化模式下,背板力学性能和PET层结晶度的变化,归纳了背板失效与其PET层结晶度的关系,并对几种老化模式进行了比较.结果表明,湿热老化和加速湿热老化时,PET层趋于结晶,为了保证背板不失效,结晶度应该控制在38%以下;紫外辐照老化时,分子结构破坏为主导,通过比较力学性能发现,...     

聚酰胺光伏背板老化性能及机理研究

分别研究了在湿热老化、加速湿热老化、紫外辐照老化模式下,背板的力学性能和聚酰胺熔融焓及黄度指数的变化,分析了老化前后背板的断面形貌和表面形貌变化。结果表明:湿热老化和加速湿热老化聚酰胺趋于结晶以及聚酰胺和玻璃纤维界面作用减弱;紫外辐射老化主要导致酰胺键断开,分子结构破坏。通过比较老化前后力学性能、黄度指数及表面形貌发现,紫外辐照老化对聚酰胺背板的影响较大。     

太阳能电池背板封装材料的发展状况

太阳能是绝大部分能源的来源,也是取之不尽的清洁能源。随着光伏行业的发展,太阳能电池用量越来越大。而起到保护作用,决定电池板使用寿命至关重要的太阳能电池背板封装材料也得到长足发展。太阳能电池光伏组件中只有背板材料没有实现国产化,所以背板的发展显得尤为重要。本文介绍了太阳能电池背板的应用、结构、性能和发展状况等情况。     

太阳能电池封装背板的发展状况

太阳能是绝大部分能源的来源,也是取之不尽的清洁能源。随着光伏行业的发展,太阳能电池用量越来越大。而起到保护作用,决定电池板使用寿命至关重要的太阳能电池封装背板也得到长足发展。本文介绍了太阳能电池背板的应用、结构、性能和发展状况等情况。     

PVDF膜将成为光伏背板外层材料领导者

正据统计,2015年全球新增光伏装机量达59 GW,中国新增约15 GW。中国是目前最大的光伏制造市场,光伏组件由玻璃-EVA-电池片-EVA-背板的结构封装而成,背板位于光伏组件最外层,是光伏组件的关键保护材料。而背板最外层的材料则是决定背板使用寿命的关键因素。PVDF是含氟高分子中户外耐久性、耐酸雨、耐大气污     

以聚烯烃为内粘结层的背板与EVA粘结力下降原因分析

背板是太阳能电池组件的背面保护材料,背板与EVA粘结力的下降可能导致背板脱层,使内部封装材料和电池片遭到破坏,从而影响组件的发电效率以及降低组件的使用寿命。本文阐述了以聚烯烃材料作为内粘结层的背板与封装胶膜EVA之间粘结力下降的现象,并从助剂迁移及原材料等方面分析了造成这种现象的原因。     

光伏组件用EVA封装胶膜的老化研究进展

综述了自上世纪80年代以来乙烯一醋酸乙烯酯共聚物（EVA）的老化机理及研究成果,介绍了光伏组件用EVA配方及结构对封装胶膜老化性能和使用寿命的影响。提出了光伏组件封装胶膜老化研究存在的问题。     

从光伏背板技术发展路线谈氟碳涂料技术发展

背板是光伏组件最重要的封装材料之一,背板材料的质量直接关系光伏组件的发电效率及使用寿命。本研究对背板材料的关键作用及特点、背板产品技术发展路线、涂氟背板发展机遇及氟碳涂料技术研究等方面进行了阐述。未来背板市场将是高分子柔性背板、玻璃背板和其他材质背板共存的时代;目前,除玻璃背板外的传统氟碳材料背板仍是主流,以氟碳涂料涂覆的背板材料将在传统背板市场占据重要位置,氟碳涂料在光伏发电系统中的应用将越来越广,同时在氟碳涂料技术改进下,传统背板的针对性和特定环境应用功能化将更加明显。未来,如何提升背板材料的特定环境应用功能化以及降低被新型背板材料的替代风险将是背板材料技术和氟碳涂料技术发展的新挑战。     

Increased reliability of modified polyolefin backsheet over commonly used polyester backsheets for crystalline PV modules

The weathering stability of polymeric backsheets is very important for the reliability of photovoltaic (PV) modules. In addition to reliability, cost reduction and sustainability are upcoming challenges the PV backsheet industry is facing with. The most commonly used material for PV backsheets is poly(ethylene-terephthalate)-PET. However, PET is in general very sensitive to hydrolysis, which leads to chain scission and causes embrittlement, cracking, delamination, and dimensional instability of the backsheet. Compared to that newly developed modified polyolefin backsheets have favorable selective permeation properties and high mechanical flexibility, which could be key properties for backsheets in terms of higher PV module reliability. In this work, the weathering stability of PET/fluoropolymer backsheet and an alternative coextruded polyolefin-backsheet was investigated in terms of thermal and mechanical stability. Both materials were artificially aged and the changes caused by aging were investigated. The polyester-based backsheet showed embrittlement and reduced elongation at break for 70%. The polyolefin-based backsheet retained its mechanical flexibility even after 2000 h of aging under damp-heat conditions, with no significant physical or chemical aging processes occurring. The comparison of the results of both backsheets suggests that the polyolefin backsheet is a promising candidate for the reduction of cracks and delamination in the field. © 2020 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2020 , 137, 48899.     

光伏电池背板综述

论述了光伏电池背板的类型、优缺点和制作工艺以及性能测试方法,概述了近年来国内外光伏电池背板的发展现状,并提出了当前国内光伏背板生产急需解决的问题是要提高自身产品的科技含量、开发具有自主知识产权的产品,提高市场竞争力,实现可持续发展。     

塑料薄膜之光伏背板市场分析

首先介绍了光伏背板的作用、性能要求、常见结构以及国内主要背板生产企业的背板类型、性能和生产规模，然后对背板的原材料聚对苯二甲酸乙二醇酯（PET）基膜、氟膜和胶黏剂的现状进行了分析，最后根据光伏发展的趋势，对背板市场进行了预测，并介绍了新一代背板——透明背板。     

Degradation of photovoltaic backsheets: Comparison of the aging induced changes on module and component level

In reliability testing of components for PV modules an always remaining question is about material (in)compatibilities and synergistic effects and thus, how results of singly tested materials correlate with materials aged within PV modules. Testing of single materials would simplify sample preparation, reduce costs and offer more testing options. Therefore the main objective of this study was to compare the aging behavior of single backsheets with that of backsheets incorporated within PV modules. Four different types of backsheets were chosen, all of them comprising of polyethylene terephthalate (PET) core layers, but differing outer protection layers. Test modules using identical components, varying only in the type of backsheet used were produced and damp heat aged (85°C/85% RH ≤2000 h). The results revealed no influence of the PV module lamination on the thermal characteristics of the polymeric backsheets. Even after DH aging, differences between single and module laminated backsheets were negligible. Degradation effects of PET could be detected for all aged sheets by thermal analysis and were confirmed by tensile tests and rheological measurements. Thus, it can be stated that testing of single PET based backsheets under DH aging conditions is a practicable way to investigate the applicability of a new backsheet. © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015 , 132, 42093.     

In vitro cyclic fatigue and hydrothermal aging lifetime assessment of yttria-stabilized zirconia dental ceramics

The in vitro lifetime assessment of dental zirconia has been the focus of researchers. This work mainly studied the cyclic fatigue lifetime in saliva and aging lifetime of three commercial zirconia dental materials: two kinds of 3 mol%-yttria stabilized zirconia ST(super-translucence) and MT(medium-translucence), in which MT contains a small amount of alumina; a 5 mol%-yttria stabilized zirconia TT(tooth-translucency). ST and MT materials have higher initial mechanical strength (flexural strength) and initial crack propagation threshold than TT materials, thus they have longer cycle fatigue lifetime, but TT has best aging resistance(no aging) in existing aging procedures. MT has a higher initial mechanical strength and better aging resistance than ST samples due to the influence of alumina at grain boundary, but has lower strength reliability. Finally the service lifetime of the three materials was evaluated, and some guidance for their use is provided.     

硬质聚氨酯泡沫塑料贮存寿命预测研究

对硬质聚氨酯泡沫塑料进行了贮存寿命预测研究。在室内贮存过程中,硬质聚氨酯泡沫塑料的10%定应变压缩应力不断下降。利用人工加速湿热老化实验数据,采用阿累尼乌斯方程外推法和时温等效原理初步预测了硬质聚氨酯泡沫塑料在贮存条件为20℃5、0%RH下的贮存寿命分别为20.1a和34.4a。