Ionic liquid treatment for increasing the wet strength of paper for aqueous environment purification

2018 Fiscal Year Final Research Report

• Project/Area Number: 16K07810
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Wood science
• Research Institution: Kochi University
• Principal Investigator: Ichiura Hideaki 高知大学, 教育研究部自然科学系農学部門, 准教授 (30448394)
• Project Period (FY): 2016-04-01 – 2019-03-31
• Keywords: 湿潤紙力 / イオン液体

Outline of Final Research Achievements

Ionic liquid treatment for increasing the wet strength of paper was studied. The treatment conditions with the ionic liquid 1-butyl-3-methylimidazolium chloride ([BMIM]Cl) were investigated for improvement of the wet strength. The wet strength of the paper was improved by the [BMIM]Cl treatment. This could be attributed to formation of a cellulose film on the paper surface after partial dissolution of cellulose fibers in the paper with [BMIM]Cl treatment. The [BMIM]Cl used for the treatment was recovered by vacuum distillation and dehydration was used to treat new paper. This recovered [BMIM]Cl had the same function as the virgin [BMIM]Cl in enhancing the wet strength. The paper containing activated carbon treated with [BMIM]Cl could be stirred in aquatic environment and then, could remove the pollution in aquatic environment.

Free Research Field

パルプ紙

Academic Significance and Societal Importance of the Research Achievements

ティッシュペーパーには、湿潤紙力増強剤であるポリアミンアミドエピクロロヒドリン樹脂（PAE）が使用されている。このPAEの製造過程で生成する有機系塩素化合物は、PRTR法の規制対象となっている。本研究の手法を用いれば、現在、使用されているPAEが不要となり、環境への負荷を減らすことが可能である。また、全て天然成分のセルロース成分からなる湿潤紙力増強紙の調製が可能であり、学術的にも意義がある。