Xiaojuan Lai This email address is being protected from spambots. You need JavaScript enabled to view it.1,2, Xiaohu Liu1,2, Lei Wang1,2, Bin Yuan3, Guiru Liu1,2, and Hui Cao1

1Shaanxi University of Science and Technology, Key Laboratory of Chemical Additives for China National Light Industry, Xi’an, Shaanxi 710021, China
2Shaanxi Agricultural Products Processing Technology Research Institute, Qingyang, Gansu 745412, China
3The twelfth Oil Production Plant of Changqing Oilfield Branch, Yinchuan, Ningxia 750000, China


Received: March 10, 2022
Accepted: June 3, 2022
Publication Date: September 11, 2022

 Copyright The Author(s). This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are cited.

Download Citation: ||https://doi.org/10.6180/jase.202306_26(6).0002  


A water-borne polyurethane-acrylate emulsion (WPUA) prepolymer was synthesized by using polycaprolactone diol (PCL), toluene diisocyanate (TDI), 2,2-bis (hydroxymethyl) butyric acid (DMBA), 1,4-butanediol (BDO) and methyl methacrylate (MMA) as main materials. After the coupling modified nano-SiO2 was grafted with graphene oxide, it was polymerized with polyurethane prepolymer in situ. The amine-free waterborne polyurethane-acrylate composite emulsion (SiO2-NH2-GO/WPUA) modified by functionalized graphene was prepared by self-emulsification. The amount of functionalized graphene was discussed, and its composite emulsion and film were tested and characterized. Compared with waterborne polyurethane-acrylate (WPUA), SiO2-NH2-GO/WPUA has better temperature resistance and film properties. When the mass fraction of SiO2- NH2-GO is 0.75%, compared with unmodified emulsion film, the thermal decomposition temperature of the composite film increased by 14.51oC; The tensile strength increased to 81.28 MPa; the adhesive prepared by the composite emulsion has a T-peel strength of 15.4 N in aluminum foil/PVC film. The indexes such as the easy oxide meet the standard of pharmaceutical packaging containers, indicating that the waterborne polyurethane adhesive is suitable for pharmaceutical packaging.

Keywords: waterborne polyurethane polyacrylate, graphene oxide, silane coupling agent, in situ polymerization, composite emulsion


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