本文選題：聚丙烯纖維 + ES纖維�。� 參考：《天津科技大學(xué)》2017年碩士論文

【摘要】：隨著環(huán)境問題的日益嚴重,清潔型汽車(如燃料電池汽車和電動汽車等)的研發(fā)已經(jīng)備受關(guān)注。其中,可充電型的混合動力汽車可能被認為是最有前景的。但是,混合動力型汽車的電池必須具備優(yōu)良的輸出功率、高容量、壽命長等特點。堿性電池以其優(yōu)良的性能而成為混合動力型汽車的電源之一。因此,高性能的堿性電池越來越受到重視,隔膜紙作為影響電池性能的重要因素之一,高性能隔膜紙的研究和生產(chǎn)顯得尤為重要。本文以聚丙烯纖維與聚乙烯/聚丙烯雙組分皮芯結(jié)構(gòu)(Ethylene-Propylene Side By Side,簡稱ES)纖維為隔膜紙原料,采用濕法成型工藝制備高勻度、高質(zhì)量的堿性電池隔膜紙。先對聚丙烯纖維和ES纖維的基本形態(tài)分析;然后考察了聚丙烯纖維和ES纖維混合抄造過程中,ES纖維的加入量對隔膜紙頁成型的作用,并探討了 ES纖維加入量對隔膜紙性能的關(guān)系;為了提高電池隔膜紙的強度和吸堿性能等,優(yōu)化了隔膜紙成型過程中的熱壓溫度、熱壓壓力變化與隔膜紙性能的關(guān)系。為得到高強度、高質(zhì)量的隔膜紙,對疏解轉(zhuǎn)數(shù)、不同類型助劑、纖維配比等條件進行了優(yōu)化;以及采用濃硫酸對電池隔膜紙進行磺化處理,提高隔膜紙的親水性能。研究結(jié)果表明,ES纖維的平均直徑為14.1μm,而聚丙烯纖維平均直徑為2.06 μm,ES纖維的加入將會影響著隔膜紙的孔徑、孔隙率等質(zhì)量指標;聚丙烯纖維較長,在與ES纖維混合抄造過程中,ES纖維的加入量在20%時紙頁勻度較好;隔膜紙最佳的熱壓壓力和熱壓溫度分別為0.5 MPa和135 ℃,纖維之間形成了多接觸點的熔融結(jié)合,紙頁強度上升。此外,疏解轉(zhuǎn)數(shù)的增加促進了纖維沉降體積和隔膜紙強度的上升,且在45000r后兩者變化趨于平緩。水溶性高分子PEO、CMC、PAM的加入均會改善纖維分散情況,并使得隔膜紙強度提高,最終選用1.5% (相對絕干漿料)的PEO加入纖維懸浮體系。ES纖維的加入使得隔膜紙強度、孔徑、吸堿率等均呈現(xiàn)出上升趨勢,當ES纖維加入量為45%時,符合堿性電池隔膜紙最大孔徑的要求。親水化處理隔膜紙,磺化時間為15 min左右時隔膜紙性能最佳。
[Abstract]:With the increasingly serious environmental problems, the development of clean cars, such as fuel cell vehicles and electric vehicles, has attracted much attention. Among them, rechargeable hybrid cars may be considered the most promising. However, the batteries of hybrid vehicles must have excellent output power, high capacity, long life and so on. The battery has become one of the power sources of hybrid electric vehicles for its excellent performance. Therefore, the high performance alkaline batteries are being paid more and more attention. As one of the important factors affecting the performance of the battery, the research and production of high performance diaphragm paper is particularly important. This paper is based on the double component core of polypropene fiber and polyethylene / polypropylene. The structure (Ethylene-Propylene Side By Side, abbreviated as ES) fiber is a diaphragm material, using the wet molding process to prepare the high evenness and high quality alkaline battery diaphragm. The basic morphological analysis of polypropylene fiber and ES fiber is first analyzed. Then, the amount of ES fiber added to the diaphragm page during the mixing process of polypropylene fiber and ES fiber is investigated. In order to improve the strength and alkali absorption properties of the diaphragm paper, the relationship between the temperature of the diaphragm paper and the relationship between the change of hot press pressure and the performance of diaphragm paper is optimized in order to improve the strength of the diaphragm paper and the performance of the diaphragm paper. In order to get the high strength, high quality diaphragm, the number of dispersing and different types of auxiliaries for the separation of ES. The fiber ratio and other conditions were optimized, and the hydrophilic property of diaphragm paper was improved by sulfuric acid. The average diameter of ES fiber was 14.1 u m, and the average diameter of polypropylene fiber was 2.06 m. The addition of ES fiber would affect the pore size and porosity of diaphragm paper. The polypropylene fiber is longer. In the process of mixing with ES fiber, the addition of ES fiber at 20% is better. The best hot press pressure and the hot press temperature of the diaphragm are 0.5 MPa and 135 C respectively. The fusion of multi contact points is formed between the fibers and the strength of the paper page rises. In addition, the increase of the number of unfolding promotes the fiber settlement. The strength of the product and diaphragm is rising, and the change tends to be slow after 45000r. The addition of water-soluble polymer PEO, CMC, and PAM will improve the dispersion of fiber and increase the strength of the diaphragm, and finally select the PEO of 1.5% (relative dry slurry) to join the fiber suspension system.ES fiber to make the diaphragm strength, pore size, alkali absorption rate and so on. When ES fiber is added to 45%, it meets the requirement of the maximum aperture of alkaline battery diaphragm. The performance of diaphragm paper is the best when hydrophilic membrane paper is hydrophilic and the time of sulfonation is about 15 min.
【學(xué)位授予單位】：天津科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TM911.14

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