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저자 섹비팡, 이철우, 류정용, 최경화
저널명 2020 한국펄프종이공학회 온라인 학술대회 발행년도 2020.10
작성자 관리자 (admin) 등록일 2020.12.30 조회수 31
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 Bast fiber of the paper mulberry (Broussonetia papyrifera) is significant fiber resources for paper making. As regards to the chemical composition of the paper mulberry bast fiber, its high cellulose content and low lignin contents compared to that of wood make this nonwood fibers valuable for papermaking. Commercial pulping process involved the chemical processes like the sulphate (kraft), sulphite or soda process. Soda process is usually applied for pulping of nonwood fiber. However, the application of commercial pulping methods to the lignocellulosic biomass have leads to the chemical and mechanical degradation of cellulosic fibers. It needs to develop the new alternative tailor-made solvents for pulping. Only five years ago, it was discovered that some natural Deep Eutectic Solvents (DESs) that can function as stable and “green” solvents show very high lignin solubility, indicating they could be used as novel pulping solvents in the paper industry. This type of solvent has the unique ability to dissolve and thus mildly fractionate lignin, hemicellulose and cellulose (the chemical building blocks for paper) at low temperature and atmospheric pressure, making the process more energy efficient. However, the previous acid-based DESs that made from carboxylic acid was being proved to have low selectivity in pulping process. i.e. simultaneous degradation of cellulose and lignin happened. Thus, there comes a need to develop the alkaline-based DES. In this work, we present a study on the feasibility of alkaline-based DES in the pulping of paper mulberry bast fiber. For the preparation of DES, it was prepared in a 1:5 molar ratio of K2CO3-Glycerin with their role as hydrogen bond acceptor (HBA) and hydrogen bond donor (HBD) respectively. Then, the experiment was carried out with different mixing ratio between DES and H2O. The results show that our novel alkaline-based DES is an alternative approach to the pulping of bast fiber of paper mulberry.





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