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pH-Induced Electrostatic Interaction between Polyacrylates and Amino-Functionalized Graphene Oxide on Stability and Coating Performances

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Shaanxi Collaborative Innovation Center of Industrial Auxiliary Chemistry and Technology, Shaanxi University of Science and Technology, Xi’an 710021, China
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College of Chemistry and Chemical Engineering, Shaanxi University of Science and Technology, Xi’an 710021, China
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College of Bioresources Chemical and Materials Engineering, Shaanxi University of Science and Technology, Xi’an 710021, China
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School of Chemistry and Chemical Engineering, Northwestern Polytechnical University, Xi’an 710129, China
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Authors to whom correspondence should be addressed.
Academic Editor: Ioan Botiz
Polymers 2021, 13(19), 3406; https://doi.org/10.3390/polym13193406
Received: 19 August 2021 / Revised: 25 September 2021 / Accepted: 28 September 2021 / Published: 3 October 2021
(This article belongs to the Section Polymer Composites and Nanocomposites)
Electrostatic interaction between polymers and nanofillers is of great importance for the properties and design of their composites. Polyacrylates with carboxyl, hydroxyl and acylamino groups were synthesized via emulsion polymerization and marked as P(MMA-BA-AA), P(MMA-BA-HEA) and P(MMA-BA-AM), respectively. Amino-functionalized graphene oxide (NGO) was prepared by Hoffman rearrangement using GO as the raw material. The polyacrylate composites were prepared by mixing NGO with each of the three kinds of polyacrylate. Effects of pH and NGO amounts on the properties of polyacrylate composites were studied. It was found that the surface charge of polyacrylate and NGO had the greatest effect on the composite properties. P(MMA-BA-AM)/NGO was not stable at any pH (2–8). With the same NGO amount of 0.1 wt%, the toughening effect of NGO on P(MMA-BA-AA) was larger than that on P(MMA-BA-HEA). The break strength of P(MMA-BA-AA)/NGO and P(MMA-BA-HEA)/NGO increased to 5.22 MPa by 47% and 3.08 MPa by 31%, respectively. NGO could increase the thermal stability of P(MMA-BA-AA) and P(MMA-BA-HEA) to different degrees. The polyacrylate film-forming processes were tested, and it showed that NGO influenced polyacrylate through the whole film-forming process. The results provide potential methods for the design of polymer-based nanocomposites. View Full-Text
Keywords: graphene oxide; polyacrylate; amino group; surface charge graphene oxide; polyacrylate; amino group; surface charge
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MDPI and ACS Style

Zhang, W.; Li, S.; Ma, J.; Wu, Y.; Liu, C.; Yan, H. pH-Induced Electrostatic Interaction between Polyacrylates and Amino-Functionalized Graphene Oxide on Stability and Coating Performances. Polymers 2021, 13, 3406. https://doi.org/10.3390/polym13193406

AMA Style

Zhang W, Li S, Ma J, Wu Y, Liu C, Yan H. pH-Induced Electrostatic Interaction between Polyacrylates and Amino-Functionalized Graphene Oxide on Stability and Coating Performances. Polymers. 2021; 13(19):3406. https://doi.org/10.3390/polym13193406

Chicago/Turabian Style

Zhang, Wenbo, Sichun Li, Jianzhong Ma, Yingke Wu, Chao Liu, and Hongxia Yan. 2021. "pH-Induced Electrostatic Interaction between Polyacrylates and Amino-Functionalized Graphene Oxide on Stability and Coating Performances" Polymers 13, no. 19: 3406. https://doi.org/10.3390/polym13193406

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