Calcium sulfate hemihydrate-mediated crystallization of gypsum on Ca 2+-activated cellulose thin films

Tomi Nissinen*, Mei Li, Nelly Brielles, Stephen Mann

*Corresponding author for this work

Research output: Contribution to journalArticle (Academic Journal)

6 Citations (Scopus)

Abstract

Spin-coated cellulose thin films have been used as model substrates to investigate the crystallization of calcium sulfate dihydrate (gypsum) under industrially relevant conditions using highly concentrated dispersions of calcium sulfate hemihydrate (bassanite). Pre-treatment of the films by regeneration in aqueous solutions of Ca2+ promotes gypsum crystallization specifically on the polysaccharide substrate in the presence of bassanite or in control solutions comprising supersaturated calcium sulphate. The results demonstrate a facile procedure in which inert films of cellulose are rendered active with regard to gypsum nucleation and growth, and could have important applications in the processing and general application of Plaster of Paris-based materials and products.

Original languageEnglish
Pages (from-to)3793-3798
Number of pages6
JournalCrystEngComm
Volume15
Issue number19
DOIs
Publication statusPublished - 21 May 2013

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