Foaming behavior of water-soluble cellulose derivatives: hydroxypropyl methylcellulose and ethyl hydroxyethyl cellulose
Artikel i vetenskaplig tidskrift, 2015

Hydroxypropyl methylcellulose and ethyl hydroxyethyl cellulose could be interesting candidates for production of lightweight, foamed packaging material originating from non-fossil, renewable resources. The foaming ability of nine different grades of the two cellulose derivatives, using water as the blowing agent, was investigated using a hot-mold process. The foaming process was studied by evaluating the water loss during the heating, both in a real-time experiment and by thermal gravimetric analysis. Further, the development of the rheological properties of the derivative-water mixtures during a simulated foaming process was assessed using dynamical mechanical thermal analysis and viscosity measurements. Five of the studied derivatives showed promising properties for hot-mold foaming and the final foams were characterized with regard to their apparent density. It was concluded that the foamability of these systems seems to require a rather careful tailoring of the viscoelastic properties in relation to the water content in order to ensure that a network structure is built up and expanded during the water evaporation.

Bulk density

Hydroxypropyl methylcellulose (HPMC)

Rheological characterization

Cellulose derivatives

Ethyl hydroxyethyl cellulose (EHEC)

Foaming

Författare

Kristina Karlsson

Chalmers, Material- och tillverkningsteknik, Polymera material och kompositer

Erich Schuster

SP Food and Bioscience

Mats Stading

Chalmers, Material- och tillverkningsteknik, Polymera material och kompositer

Mikael Rigdahl

Wallenberg Wood Science Center (WWSC)

Chalmers, Material- och tillverkningsteknik, Polymera material och kompositer

Cellulose

0969-0239 (ISSN)

Vol. 22 2651-2664

Drivkrafter

Hållbar utveckling

Ämneskategorier

Materialteknik

Textil-, gummi- och polymermaterial

Styrkeområden

Materialvetenskap

DOI

10.1007/s10570-015-0669-0