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Tuesday, 24 September 2019
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Raw materials & technologies, Technologies

Constructing a hydrophilic polymer surface for underwater applications

Tuesday, 21 June 2016

The construction of a highly hydrophilic polymer surface with excellent long-term stability underwater is a great challenge.

The construction of a highly hydrophilic polymer surface with excellent long-term stability underwater is a great challenge. Source: joacant/pixelio.de
The construction of a highly hydrophilic polymer surface with excellent long-term stability underwater is a great challenge. Source: joacant/pixeli...

In this paper, Chinese researchers from Advanced Coatings Research Center of Ministry of Education of China, Fudan University, Shanghai, employed a facile UV curing technique to realise the three-dimensional (3D) grafting of poly(ethylene glycol) diacrylate (PEGDA, molecular weight: 400, 600, and 1000 g/mol) on a bisphenol A epoxy acrylate (BEA) sheet.

Long-term antifouling is not satisfactory

The cross section morphology, surface chemical composition, and wettability of the sheets were monitored using an optical microscope, an attenuated total reflectance Fourier transform infrared spectroscope, and a water contact angle analyser, respectively. The PEGDA-grafted epoxy sheets displayed a highly hydrophilic surface and meanwhile possessed excellent stability underwater, despite the molecular weight of PEGDA. In contrast, the PEGDA/BEA blend sheets are easily damaged underwater, due to strong swelling. In addition, the PEGDA1000-grafted BEA sheet demonstrated good antifouling performance in a natural marine environment. Nevertheless, its long-term antifouling is not satisfactory, being presumably due to hydrolysis or biodegradation of the PEG segments.

The study is published in: Applied Polymer Science.

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