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Enzymatic hydrolysis of PTT polymers and oligomers |
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| Authors: | Eberl A Heumann S Kotek R Kaufmann F Mitsche S Cavaco-Paulo A Gübitz G M |
| Affiliation: | aResearch Centre Applied Biocatalysis, Petersgasse 14, A-8010 Graz, Austria bGraz University of Technology, Department of Environmental Biotechnology, Petersgasse 12, A-8010 Graz, Austria cCollege of Textiles, Textile Engineering, Chemistry and Science Department, North Carolina State University, USA dCIBA Inc., Basel, Switzerland eGraz University of Technology, Research Institute for Electron Microscopy, Steyrergasse 17, A-8010 Graz, Austria fUniversity of Minho, Department of Textile Engineering, 4800 Guimaraes, Portugal |
| Abstract: | Oligomers and polymers (film, fabrics) of the linear aromatic polyester poly(trimethylene terephthalate) (PTT) were treated with polyesterases from Thermomyces lanuginosus, Penicillium citrinum, Thermobifida fusca and Fusarium solani pisi. The cutinase from T. fusca was found to release the highest amounts of hydrolysis products from PTT materials and was able to open and hydrolyse a cyclic PTT dimer according to RP-HPLC–UV detection. In contrast, the lipase from T. lanuginosus also showed activity on the PTT fibres and on bis(3-hydroxypropyl) terephthalate (BHPT) but was not able to hydrolyse the polymer film, mono(3-hydroxypropyl) terephthalate (MHPT) nor the cyclic dimer of PTT. As control enzymes inhibited with mercury chloride were used. Surface hydrophilicity changes were investigated with contact angle measurements and the degree of crystallinity changes were determined with DSC. |
| Keywords: | Poly(trimethylene terephthalate) Polyester Polyesterase Cutinase |
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