Introduction of Carboxylic Acid Group to Polypropylene Fabric for Battery Separator

Seong-Ho Choi; Young Chang Nho

Korean Journal of Chemical Engineering, Vol.16, No.4, 505-510, July, 1999

DOI10.1007/BF02698276 Export Citation

Introduction of Carboxylic Acid Group to Polypropylene Fabric for Battery Separator

Seong-Ho Choi^†, and Young Chang Nho

Korea Atomic Energy Research Institute, Taejon, Korea

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Carboxylic acid group was introduced by radiation-induced grafting of acrylic acid (AAc) onto a polypropylene (PP) nonwoven fabric for a battery separator. The AAc-grafted PP nonwoven fabric was characterized by IR, SEM, and TGA. The wetting speed, electrolyte retention, electrical resistance, and tensile strength were evaluated after grafting of AAc. It was found that the wetting speed, electrolyte retention, thickness, and ion-exchange capacity increased, whereas the electrical resistance decreased with increasing grafting yield. The elongation of AAc-grafted PP nonwoven fabric decreased with increasing grafting yield in dry state, whereas the elongation increased in wetting state.

Keywords:Polypropylene Nonwoven Fabrics;Radiation-Induced Graft Copolymerization;Acrylic Acid;Ion-Exchange Capacity;Electrolyte Retention;Electrical Resistance

[References]

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O'Neill T, J. Polym. Sci., 10, 569 (1972)
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[1] Choi SH, Nho YC, Korea Polym. J., 6(4), 287 (1998)

[2] Choi SH, Nho YC, J. Appl. Polym. Sci., 71(13), 2227 (1999)

[3] Giovannoni RT, Vaidyanthan H, "Separators for Nickel-Hydrogen Batteries," Braz. Patent, 8804397 (1989)

[4] Gupta BD, Chapiro A, Eur. Polym. J., 25(11), 1033 (1989)

[5] Haddadai-Asl V, Burford RP, Gernett JL, Radiat. Phys. Chem., 45(2), 191 (1995)

[6] Hishinuma M, Iwahori T, Sugimoto H, Sugawa H, Tanaka T, Yamamoto T, Yanagisawa Y, Yoda Y, Yoshida S, Electrochim. Acta, 35(1), 255 (1990)

[7] Hosako Y, Yamaguchi N, Ryuichi I, "Alkari-Resistant Synthetic Fibers for Battery Separators," Japan Patent, 01132820 (1989)

[8] Ishigaki I, Sugo T, Senoo K, Okada T, Okamoto J, Machi S, J. Appl. Polym. Sci., 27, 1033 (1982)

[9] Ishigaki I, Sugo T, Senoo K, Okada T, Okamoto J, Machi S, J. Appl. Polym. Sci., 27, 1043 (1982)

[10] Kaur I, Misra BN, Kumar S, J. Appl. Polym. Sci., 69(1), 143 (1998)

[11] Meeus ML, Strauven YAJ, "Zinc Alloy Powders for Alkaline Batteries," Eur. Patent, 427315 (1991)

[12] Nho YC, Jin JH, J. Appl. Polym. Sci., 63(9), 1101 (1997)

[13] O'Neill T, J. Polym. Sci., 10, 569 (1972)

[14] Sakai T, Yuasa A, Miyamura H, Kuriyama N, Ishikawa H, Kidorui, 16, 94 (1990)

[15] Suzuki T, Furukawa N, Hasegawa K, Nishio K, "Electrically Conductive Material, Its Preparation and Secondary Battery using This Material," Eur. Patent, 262837 (1988)

[16] Wen-Tong PL, "Nonaquous Lithium Battery with Separator of Microporous Polypropylene Radiation Grafted with Olefinic Monomer," Eur. Patent, 262846 (1998)