Water resistant nanopapers prepared by lactic acid modified cellulose nanofibers

作者：Sethi Jatin; Farooq Muhammad; Sain Sunanda; Sain Mohini; Sirvio Juho Antti; Illikainen Mirja; Oksman Kristiina

来源：Cellulose, 2018, 25(1): 259-268.

DOI：10.1007/s10570-017-1540-2

• Cellulose nanofibers
• Lactic acid
• Water resistant nanopaper
• Mechanical properties

The current work reports a novel, completely water based approach to prepare the water resistant modified cellulose nanopapers. Lactic acid in aqueous medium was attached on cellulose nanofibers surface with the aid of ultra-sonication and later oligomerized (polymerized) by compression molding under high temperature and pressure, to obtain the modified nanopapers with enhanced mechanical properties. The modified nanopapers showed an increase of 32% in the elastic modulus and 30% in the yield strength over reference nanopapers. Additionally, the modified nanopaper was hydrophobic in nature and had superior storage modulus under moist conditions. The storage modulus of wet modified nanopaper was three times (2.4 GPa) compared to the reference nanopapers (0.8 GPa) after 1 h immersion in water. Finally, the thermal stability of the modified nanopaper was also higher than reference nanopaper. The material reported is 100% bio-based.

• 出版日期2018-1