Degradation of Polyethylene and Nylon-66 by the Laccase-Mediator System |
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Authors: | Mikihito Fujisawa Hirofumi Hirai Tomoaki Nishida |
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Institution: | (1) Department of Forest Resources Science, Faculty of Agriculture, Shizuoka University, Ohya 836, Shizuoka, 422-8529, Japan |
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Abstract: | We investigated whether the laccase-mediator system (LMS) with 1-hydroxybenzotriazole (HBT) as a mediator could degrade high-molecular-weight polyethylene and nylon-66 membranes. The LMS markedly reduced the elongation and tensile strength of these membranes. After 3 days of treatment with the LMS, the M
w of polyethylene decreased from 242,000 to 28,300, and that of nylon-66 from 79,300 to 14,700. The LMS also decreased the polydispersity (M
w/M
n) of polyethylene and nylon-66. Furthermore, these reductions in elongation, tensile strength, and molecular weight were accompanied by morphological disintegration of the polyethylene and nylon-66 membranes. These results strongly suggest that the LMS with HBT can effectively degrade polyethylene and nylon-66. |
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Keywords: | Polyethylene nylon-66 biodegradation laccase mediator |
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