合格作品 字?jǐn)?shù)19827個(gè)字
摘 要
太陽(yáng)能電池組件中的核心部分硅電池本身壽命己具有30年以上的使用壽命，然而對(duì)電池片起到固定、密封和保護(hù)作用的透明高分子封裝膠在室外天候環(huán)境中會(huì)很快老化變黃，從而導(dǎo)致整個(gè)電池組件的光電轉(zhuǎn)化效率下降。封裝材料的使用壽命就限制了整個(gè)電池組件的壽 命。因此，研制自然氣候條件下，光、電和力學(xué)性能穩(wěn)定可靠、使用期長(zhǎng)的透明高分子封裝材料是提高太陽(yáng)電池組件壽命，降低太陽(yáng)能發(fā)電成本的關(guān)鍵。
本試驗(yàn)中，EVA膠膜的熱氧老化試驗(yàn)在90℃下進(jìn)行，選用含33％VA的EVA做基本原料，通過熔融共混擠出的方法加入抗氧劑、增塑劑、交聯(lián)劑和增粘劑，再經(jīng)過熱壓，得到太陽(yáng)能電池封裝用EVA封裝材料。研究了不同改性劑對(duì)EVA封裝材料軟化點(diǎn)、拉伸強(qiáng)度、透光率和抗老化性的影響。結(jié)果表明，在EVA與松香的比例為5:3的條件下,選用適宜的交聯(lián)劑，抗氧化劑，增塑劑能夠使EVA膠膜在低溫短時(shí)間條件下進(jìn)行封裝固化，拉伸強(qiáng)度、透光率和抗老化性都能達(dá)到進(jìn)口EVA的標(biāo)準(zhǔn),并且在此條件下固化的EVA封裝材料具有很好的熱穩(wěn)定性。本工作所制備的改性EVA封裝材料的熱穩(wěn)定性明顯優(yōu)于國(guó)產(chǎn)EVA，接近進(jìn)口封裝材料的性能指標(biāo)。
關(guān)鍵詞 EVA 改性劑 軟化點(diǎn) 透光率
Abstract
Environmental pollution and energy shortage is human in the 21 st century one of the biggest challenges facing. Use of solar cell module will be clean, renewable sunlight into electricity is solve these two problems of the most effective ways to. Solar cell module central part of silicon itself with 30 years of life has the service life of the battery, but of a fixed, sealing and protect the role of the polymer transparent packaging the rubber in the outdoor environment will soon aging weather become yellow, leading to the whole cell module photoelectric conversion efficiency descend. The results, the service life of plastic packaging limits the battery life of the components. Therefore, the development of natural weather conditions, light, electric and mechanical performance is stable and reliable, life long transparent polymer packaging materials is to improve the solar cell module life, reducing the cost of solar power of the key.
This test is to contain 33% of the VA basic raw materials, through EVA do molten blending extrusion method of adding antioxidants, plasticizer, crosslinking agent and viscous agent, and by hot pressing, get the solar cell encapsulation with EVA film. The research in different modifier to EVA film softening point, tensile strength, light transmittance and the influence of the anti-aging sex. The results show that, in EVA and the proportion of rosin for "conditions, choose appropriate crosslinking agent, antioxidants, crosslinking agent, plasticizer can make EVA film in the low temperature under the condition of short time encapsulate curing, tensile strength, light transmittance and anti-aging sex can meet all the standards, and imported EVA in the conditions of curing the film has better heat EVA oxygen stability. This work by the system modification of the thermal stability of the film EVA oxygen is superior, and close to the domestic products imported products.
Key words EVA modifier softening point light transmittance
目 錄
摘 要 1
Abstract 2
第1章 緒論 4
1.1 本課題研究的目的和意義 4
1.2 EVA封裝材料研究現(xiàn)狀 5
1.3 助劑對(duì)EVA性能的影響 9
1.3.1 增粘劑 9
1.3.2 交聯(lián)劑 10
1.3.3 黏度調(diào)節(jié)劑 10
1.3.4 抗氧劑 10
1.4 研究?jī)?nèi)容及方法 10
1.4.1 EVA主體成分配比的確定 10
1.4.2 改性劑的選擇 11
1.4.3 研究方法 11
第2章 實(shí)驗(yàn)部分 11
2.1 實(shí)驗(yàn)試劑與儀器設(shè)備 11
2.1.1 主要原料及試劑 11
2.1.2 主要儀器設(shè)備 12
2.2 改性EVA的制備 13
2.2.1 EVA封裝材料制備步驟 13
2.2.2 不同配比EVA的制備 13
2.2.3 改性EVA封裝材料的制備 14
2.3 改性EVA的性能檢測(cè) 14
2.3.1 軟化點(diǎn)的測(cè)定 14
2.3.2 透過率的測(cè)定 14
2.3.3 抗老化性的測(cè)定 14
2.3.4 拉伸強(qiáng)度的測(cè)定 14
第三章 結(jié)果與討論 15
3.1 通過軟化點(diǎn)的測(cè)定確定松香、石蠟和EVA的配比 15
3.1.1 EVA的含量對(duì)軟化點(diǎn)的影響 15
3.1.2 松香的含量對(duì)軟化點(diǎn)的影響 16
3.1.3 石蠟的含量對(duì)軟化點(diǎn)的影響 16
3.2 改性劑的選擇 18
3.2.1 軟化點(diǎn)的測(cè)定 18
3.2.2 透光率的測(cè)定 19
3.2.3 抗老化性的測(cè)定 21
3.2.4 拉伸強(qiáng)度的測(cè)定 22
結(jié) 論 24
致 謝 25
參考文獻(xiàn) 26
DIRECTORY
Abstract 1
Abstract 2
Chapter 1 Introduction 4
1.1 The purpose and significance of the research 4
1.2 EVA packaging materials Research 5
1.3 EVA performance additives for 9
1.3.1 Tackifier 9
1.3.2 Crosslinker 10
1.3.3 Viscosity modifier 10
1.3.4 Antioxidants 10
1.4 Research contents and methods 10
1.4.1 EVA to determine the main chemical composition of 10
1.4.2 The choice of modifier 11
1.4.3 Research Methods 11
Chapter 2 Experimental 11
2.1 Reagents and equipment 11
2.1.1 The main raw materials and reagents 11
2.1.2 Main equipment 12
2.2 Preparation of modified EVA 13
2.2.1 EVA packaging materials preparation steps 13
2.2.2 Preparation of 13 different combinations of EVA 13
2.2.3 Preparation of modified EVA packaging materials 14
2.3 Performance testing of modified EVA 14
2.3.1..