The Design and Preparation of Antibacterial Polymer Brushes with Phthalocyanine Pigments
Coatings, ISSN: 2079-6412, Vol: 13, Issue: 6
2023
- 3Citations
- 6Captures
- 1Mentions
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Coatings, Vol. 13, Pages 1114: The Design and Preparation of Antibacterial Polymer Brushes with Phthalocyanine Pigments
Coatings, Vol. 13, Pages 1114: The Design and Preparation of Antibacterial Polymer Brushes with Phthalocyanine Pigments Coatings doi: 10.3390/coatings13061114 Authors: Yu Zhou Kaimin Chen Li
Article Description
Phthalocyanine pigments have many problems in waterborne coating applications because of their low polarity, poor dispersion in water, and easy agglomeration properties. In order to solve these problems, the phthalocyanine pigments were encapsulated with a copolymer of methyl methacrylate (MMA) and butyl acrylate (BA) by a mini-emulsion polymerization method. The pigments are effectively dispersed in water and have good compatibility with the resin. Concerning the bacterial reproduction and growth problem for the waterborne system, the resin-encapsulated phthalocyanine pigments were further grafted with antibacterial polymer poly(N-(2-hydroxyethyl) acrylamide) (PHEAA) on its surface using the photoemulsion polymerization technique. Comprehensive properties, including centrifugal stability and chromaticity change, were studied. The polymer encapsulation improved the centrifugal stability of the pigment. The thermogravimetric results showed that the residual mass of C.I. Pigment Green 7 (52.30%) was higher than that of C.I. Pigment Blue 15:3 (30.06%), and the sublimation fastness of PG7 was higher. The TEM results revealed that the shape of the PG7 after encapsulation and grafting was more regular than that of PB15:3. The L* of the pigment decreased after encapsulation but then increased after further grafting. The phthalocyanine pigment composite latex had good antibacterial properties after the grafting of PHEAA.
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