Swelling and mass transport properties of nanocellulose-HPMC composite films
Journal article, 2017

Composite films were sprayed from mixtures of water soluble hydroxypropyl methylcellulose (HPMC) and either nanofibrillated cellulose (NFC) or cellulose nanocrystals (CNC). Fiber diameter was similar for both nanocelluloses but fiber length was several mu m for NFC and about 200 nm for CNC. Films were characterized for morphology, swelling, mass loss and transport properties. NFC-HPMC films swelled less than CNC-HPMC films; with a HPMC content of 20 wt% NFC-HPMC and CNC-HPMC films presented swelling of 7 and 75 g/g, respectively. The swelling strongly influenced water transport across the films, with slower transport for CNC-based materials compared to NFC-based materials. The properties of NFC-based films were comparable to previous results using microfibrillated cellulose (MFC) with heterogeneous structural content and fiber lengths of similar to 10 mu m. The findings have implications for using nanocellulose to modulate material properties in wet-state applications, with effects being in strong contrast when using as a hardening filler in dry materials.

Controlled release

Composite films

Cellulose nanocrystals

Nanofibrillated

Microfibrillated cellulose

Author

Mikael Larsson

Chalmers, Chemistry and Chemical Engineering, Applied Chemistry, Pharmaceutical Technology

SuMo Biomaterials

Anders Johnsson

Chalmers, Chemistry and Chemical Engineering, Applied Chemistry, Pharmaceutical Technology

Sofie Gårdebjer

Chalmers, Chemistry and Chemical Engineering, Applied Chemistry, Pharmaceutical Technology

Romain Bordes

Chalmers, Chemistry and Chemical Engineering, Applied Chemistry, Applied Surface Chemistry

SuMo Biomaterials

Anette Larsson

SuMo Biomaterials

Chalmers, Chemistry and Chemical Engineering, Applied Chemistry, Pharmaceutical Technology

Materials and Design

0264-1275 (ISSN)

Vol. 122 414-421

Areas of Advance

Production

Materials Science

Subject Categories

Chemical Engineering

DOI

10.1016/j.matdes.2017.03.011

More information

Latest update

10/16/2018