DECOMPOSITION SUPPRESSION OF RAYON BY SURFACE COATING USING ANTIMICROBIAL AGENTS AND POVAL

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  • 抗菌剤とポバールの表面処理によるレーヨンの生分解の抑制

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 The authors examined whether decomposition of rayon in environment is suppressed by coating it with antimicrobial agent DC5700 and poval (PVA). When the rayon samples coated with DC5700 were decomposed in activated sludge or bark compost toge ther with non-coated samples, the coated samples needed longer time for the decomposition comparing to the non-coated samples under the environmental condition whose water content is 56% or less. Moreov er, PVA coating together with DC5700 further extended the decomposition time of rayon samples under the condition whose water content is 40% or less. The dyeing test of DC5700 using bromphenol blue indicated that PVA coating together with DC5700 prevented DC5700 from removing from the rayon su rface under the low-water-con tent condition and thus the double coating sample was decomposed slowly.

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