Effect of Acetone, Ethanol, Benzene and THF Washing Treatment on the Gas Grafting Hydrophobization Efficiency of Recycled Newspaper by Palmitoyl Chloride; 아세톤, 에탄올, 벤젠 및 THF 세척 처리가 재생 신문지의Palmitoyl Chloride에 의한 기상 소수화 효율에 미치는 영향

초록

Paper is an eco-friendly material that can replace plastic, especially as environmental pollution worsens. Made from hydrophilic cellulose fiber, paper is easy to recycle but vulnerable to moisture. To address this, a grafting treatment was performed to impart hydrophobicity by reacting gaseous fatty acid chlorides with cellulose hydroxyl groups to form an ester bond. However, paper composed of recycled fibers has low gas graft hydrophobization efficiency with fatty acid chlorides. In this study, we investigated whether the gas graft hydrophobization reaction efficiency could be improved by washing recycled newspaper with four types of organic solvents: acetone, alcohol, benzene, and tetrahydrofuran (THF). The experiment results showed that washing handsheets made from deinked newspaper stock with these solvents did not improve gaseous hydrophobization efficiency. Similarly, washing the newspaper itself with the four different solvents did not enhance the efficiency. Therefore, it is concluded that the decrease in gas grafting hydrophobization efficiency of recycled paper is not due to foreign substances that can be dissolved in organic solvents covering the fiber surface. © 2024 Korean Technical Assoc. of the Pulp and Paper Industry. All rights reserved.

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