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Foaming behavior of water-soluble cellulose derivatives: hydroxypropyl methylcellulose and ethyl hydroxyethyl cellulose

Kristina Karlsson (Institutionen för material- och tillverkningsteknik, Polymera material och kompositer) ; Erich Schuster ; Mats Stading (Institutionen för material- och tillverkningsteknik, Polymera material och kompositer) ; Mikael Rigdahl (Institutionen för material- och tillverkningsteknik, Polymera material och kompositer)
Cellulose (0969-0239). Vol. 22 (2015), 4, p. 2651-2664.
[Artikel, refereegranskad vetenskaplig]

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.

Nyckelord: Bulk density; Cellulose derivatives; Ethyl hydroxyethyl cellulose (EHEC); Foaming; Hydroxypropyl methylcellulose (HPMC); Rheological characterization



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Denna post skapades 2015-08-05. Senast ändrad 2015-10-22.
CPL Pubid: 220178

 

Institutioner (Chalmers)

Institutionen för material- och tillverkningsteknik, Polymera material och kompositer (2005-2017)

Ämnesområden

Materialvetenskap
Hållbar utveckling
Materialteknik
Textil-, gummi- och polymermaterial

Chalmers infrastruktur

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Foaming of Some Cellulose Derivatives - Initial Studies