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Sunday, 15 September 2019
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Raw materials & technologies, Applications, Protective & Marine coatings

Antifouling performance of UV-curable methacrylated PDMS/PEG coatings

Friday, 22 April 2016

Chinese researchers investigated the temperature-dependent phase-segregation behaviour and antifouling performance of UV-curable methacrylated PDMS/PEG coatings.

Anti-bacterial performance was also observed for these PDMS/PEG coatings. Source: sokaeiko/pixelio.de

Anti-bacterial performance was also observed for these PDMS/PEG coatings. Source: sokaeiko/pixelio.de

Controllable phase segregation adjustment for immiscible polymer blends has always been tough, which hinders the development of amphiphilic antifouling coatings from more accessible blends.

Blends displayed upper critical solution temperatures

Herein, methacrylated poly(dimethylsiloxane) (PDMS-MA) was synthesised and mixed with poly(ethylene glycol)methylether methacrylate (PEG-MA). It was interestingly discovered that these PDMS-MA/PEG-MA blends displayed upper critical solution temperatures (UCST) due to thermo-induced conformational change of PEG-MA and the UCST changed with PDMS-MA/PEG-MA mass ratios. Micro-/nano-phase segregation, nanophase segregation, or homogenous morphology were therefore achieved.

Enhanced resistance against bovine serum albumin

These PDMS-MA/PEG-MA blends with different mass ratios were UV-cured under varying temperatures to fabricate coatings. Their surface morphology and wettability are readily adjusted by phase segregation. For the first time, highly hydrophilic surface was achieved for coatings with microphase segregation because of the exposure of PEG-rich domains, which exhibited an enhanced protein resistance against bovine serum albumin (BSA). Anti-bacterial performance (Shewanella loihica) was also observed for these PDMS/PEG coatings.

The study is published in: Journal of Polymer Science Part B: Polymer Physics.

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