本文選題：電池隔膜紙 + ES纖維��； 參考：《齊魯工業(yè)大學》2015年碩士論文

【摘要】：隨著科學和技術的飛速發(fā)展,電池在人們生活中應用的逐步增加,高性能電池研發(fā)和制造逐漸被人們的關注,電池隔膜紙的性能是評價電池品質(zhì)的關鍵指標。本論文主要對聚烯烴纖維及電池隔膜紙的結構和性能進行了研究,以聚烯烴纖維為主體材料,采用傳統(tǒng)造紙方法為基礎并結合濕法無紡布的生產(chǎn)工藝,來生產(chǎn)高勻度、高質(zhì)量的電池隔膜紙。通過對ES纖維進行研究分析得出：ES纖維平均長度為5.415mm,平均寬度為16.11um；在SEM的觀察下可以發(fā)現(xiàn)纖維表面含有油脂類雜質(zhì),在使用前需要對纖維進行預處理；在室溫25℃、相對濕度65%的環(huán)境下,通過研究纖維對水的吸附量得出,ES纖維的吸水率較小,親水性能差,僅為0.028%；ES纖維有較好的耐酸堿液腐蝕的性能,在堿性條件下的失重率基本不超過3%；而在酸性條件下纖維容易被腐蝕,表面容易呈現(xiàn)粗糙化,但是失重率不超過10%,相比較于其他植物纖維和無機纖維,ES纖維具有較強的抗酸堿腐蝕的能力。由于聚烯烴纖維的親水性較差,纖維本身長度比較長且在水中難分散,為了提高電池隔膜紙的成紙勻度等指標,本文針對如何改善ES纖維在水中的分散性能進行了深入性的研究。實驗得出纖維分散的基本工藝條件為：ES纖維先采用十二烷基苯磺酸鈉進行預處理,干燥后配成濃度為0.04%的懸浮液且疏解時間為2min；水溶性高分子和無機電解質(zhì)都可以改善纖維網(wǎng)狀結構的勻度,最終選定采用濃度為0.3%的PEO加入ES纖維懸浮體系中；表面活性劑的添加可以讓ES纖維的單根分散效果變得很好,且脂肪醇醚硫酸鈉比十二烷基硫酸鈉作用效果較好,當AES用量為4%時,不論是單根纖維的分散效果和纖維網(wǎng)狀結構的勻度都比較好；采用質(zhì)量分數(shù)為98%的濃硫酸對ES纖維進行磺化處理,因為纖維表面接枝了大量的-S04H基團,增加了纖維的親水性能,使纖維在水中的分散性能提高。為了提高電池隔膜紙的強度和吸堿性能,實驗探究出紙張最佳熱壓溫度為135℃,因為纖維之間形成了多接觸點的熔融結合,使紙頁強度得到一定得提升,孔徑分布良好且對紙張的吸堿高度和吸堿率都有較好的影響；當消泡劑加入量為0.03%時,對懸浮液中氣泡起到一定的抑制作用；在纖維懸浮液中添加10%的PAC溶液效果較好,通過膠黏劑的附著作用,加固了其點狀或者團狀的結合,更好的提高了電池隔膜紙的抗張強度,達到37.4 Nm/g；加入替換量10%的PVA纖維,其平均長度為5.350mm,寬度為15.8um,因為和ES纖維形成了堅固的“電焊”結構,纖維之間的“焊接點”的數(shù)量增加,紙張各項性能指標相對較高,其中抗張強度可以達到45.2 Nm/g,堿溶出率為3.62%及吸堿高度57.1mm/10min。采用濃硫酸電池隔膜紙進行磺化處理,處理后的紙張表面逐漸的引入了親水基團,親水性得到了提高,使用質(zhì)量分數(shù)為98%的濃硫酸磺化處理10min后的紙張,其中抗張強度可以達到52.2 Nm/g,吸堿率為595%及吸堿高度57.8mm/10min。
[Abstract]:With the rapid development of science and technology, the application of battery in people's life is increasing gradually. The research and manufacture of high performance battery has gradually been paid attention to. The performance of the battery diaphragm paper is the key index to evaluate the quality of the battery. This paper mainly studies the structure and performance of polyolefin fiber and battery diaphragm paper, with polyolefin fiber. As the main material, it is based on the traditional paper making method and combined with the production process of wet process non-woven fabric to produce high evenness and high quality battery diaphragm. Through the research and analysis of ES fiber, the average length of ES fiber is 5.415mm and the average width is 16.11um. Under the observation of SEM, it can be found that the fiber surface contains oil clutter. Before use, the fiber should be pretreated. Under the environment of 25 C at room temperature and 65% of relative humidity, by studying the adsorption of fiber to water, the water absorption rate of ES fiber is smaller and the hydrophilic property is only 0.028%; ES fiber has good corrosion resistance to acid alkaline solution, and the weight loss rate under alkaline conditions is not more than 3%; and Under acidic conditions, the fiber is easy to be corroded and the surface tends to be rough, but the weight loss rate is not more than 10%. Compared with other plant fiber and inorganic fiber, ES fiber has a strong ability to resist acid and alkali corrosion. Because of the poor hydrophilicity of polyolefin fibers, the fiber itself is long and is difficult to disperse in water. The paper makes a thorough study on how to improve the dispersibility of ES fibers in water. The basic technological conditions for the dispersion of fiber are as follows: ES fiber is pretreated with twelve alkylbenzene sulfonate, after drying, the concentration is 0.04%, and the dissolution time is 2min; the water solubility is soluble. Both polymer and inorganic electrolytes can improve the evenness of the fiber network structure. Finally, the concentration of 0.3% PEO is selected to be added to the ES fiber suspension system. The addition of surfactant can make the single dispersion effect of ES fiber better, and the effect of fatty alcohol ether sodium sulfate is better than that of twelve alkyl sodium sulfate, when the dosage of AES is 4%. The dispersion effect of single fiber and the evenness of fiber reticulation are better, the ES fiber is sulfonated with concentrated sulfuric acid with mass fraction of 98%, because a large number of -S04H groups are grafted on the surface of the fiber, the hydrophilic property of the fiber is increased and the dispersion property of the fiber in water is increased. In order to improve the battery diaphragm paper. The strength and alkali absorption properties of the paper are investigated. The optimum hot pressing temperature of paper is 135, because the fusion of multi contact points is formed between the fibers, the strength of the paper is improved, the distribution of the pore size is good and the alkali absorption and alkali absorption of the paper have a good effect. When the amount of defoaming agent is 0.03%, the medium gas in the suspension is in the medium. The addition of 10% PAC solution in the fibrous suspension is better. The adhesion of the adhesive is used to reinforce the dot or mass combination, which improves the tensile strength of the battery diaphragm and reaches 37.4 Nm/g. The average length of the PVA fiber with the replacement amount of 10% is 5.350mm and the width is 15.8um, Because of the strong "welding" structure formed with the ES fiber, the number of "welding points" between the fibers is increased, the performance index of paper is relatively high, of which the tensile strength can reach 45.2 Nm/g, the alkali dissolution rate is 3.62% and the alkali absorption height 57.1mm/10min. is sulfonated by the membrane paper of concentrated sulfuric acid battery, the treated paper surface The hydrophilic group was gradually introduced, and the hydrophilicity was improved. The paper was treated by sulfonated sulphuric acid 10min with a mass fraction of 98%. The tensile strength of the paper was 52.2 Nm/g, the alkali absorption rate was 595% and the alkali absorption height was 57.8mm/10min..
【學位授予單位】：齊魯工業(yè)大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TM910.3

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本文編號：1920734