Swelling and mass transport properties of nanocellulose-HPMC composite films
Artikel i vetenskaplig tidskrift, 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.

Microfibrillated cellulose

Cellulose nanocrystals

Controlled release

Nanofibrillated

Composite films

Författare

Mikael Larsson

Chalmers, Kemi och kemiteknik, Tillämpad kemi, Farmaceutisk teknologi

SuMo Biomaterials

Anders Johnsson

Chalmers, Kemi och kemiteknik, Tillämpad kemi, Farmaceutisk teknologi

Sofie Gårdebjer

Chalmers, Kemi och kemiteknik, Tillämpad kemi, Farmaceutisk teknologi

Romain Bordes

Chalmers, Kemi och kemiteknik, Tillämpad kemi, Teknisk ytkemi

SuMo Biomaterials

Anette Larsson

SuMo Biomaterials

Chalmers, Kemi och kemiteknik, Tillämpad kemi, Farmaceutisk teknologi

Materials and Design

0264-1275 (ISSN)

Vol. 122 414-421

Ämneskategorier

Kemiteknik

DOI

10.1016/j.matdes.2017.03.011