Study On The Preparation Of Functionalized Water-borne Hydroxyl Acrylic Resin And Its Applications

As the country's requirements for environmental protection increase,the water-based transformation of paint resins is gradually accelerating.Due to the many advantages of waterborne hydroxyl acrylic resin,such as higher dispersion storage stability,higher hydroxyl content,excellent performance of cured coatings,and higher gloss,it has become a hot spot in the research and application of water-based resins.The research of this master's thesis is centered on the functionalization of water-borne hydroxyl acrylic resin.First of all,on the basis of the aggregation-induced emission effect,utilizing AIE fluorescent molecules as probes,the polymer structure and properties of water-borne hydroxyl acrylic resin were studied,and the mechanisms of preparation of water-borne hydroxyl acrylic resin and performance changes of coatings were explored;On that basis,functionalized graphene oxide and modified silica sol were used to functionally modify water-borne hydroxyl acrylic resin to improve the corrosion resistance and heat resistance of the coating.The main research contents and results of this article are as follows:(1)Prepare an fluorescent water-borne hydroxyl acrylic resin doped with 1,1,2,2-tetrakis(4-(diphenylamino)phenyl)ethylene(4TPAE)by in-situ polymerization,and prepare curing and Uncured fluorescent coating.Using the change of fluorescence intensity,the process of synthesis,film formation and coating performance damage of water-borne hydroxyl acrylic resin can be tracked.The results show that we can track the above process according to the change of fluorescence intensity,find more details,and make the process data,so that the system can be roughly quantitatively analyzed.(2)Use the hydroxyl groups in the low molecular weight hydroxy acrylic resin and the carboxyl groups on the graphene oxide for esterification to modify the graphene oxide and dope into the coating to improve the corrosion resistance of the water-based two-component polyurethane coating and mechanical properties.The structure and stability of the water-borne hydroxyl acrylic resin doped with GO and FGO were studied by transmission electron microscopy and ZETA potential,indicating that its storage is relatively stable.The tensile test,electrochemical impedance and salt spray test have proved that the mechanical properties and corrosion resistance of the coating doped with FGO have been better improved,indicating that the acrylic resin functionalized graphene oxide flakes are dispersed in the matrix The performance and interface interaction are significantly improved.(3)Silica sol contains a lot of silica particles,the inside of the particles is mainly Si-OSi structure,Si-O bond has higher bond energy than C-C bond,using KH560(?-(2,3-epoxypropoxy)propytrimethoxysilane)modified silica sol to reduce agglomeration in the coating,and doped it into the coating to improve the heat resistance and mechanical properties of the water-based two-component polyurethane coating.Tests such as Zeta potential and particle size,FT-IR,TGA,and X-ray diffraction have proved that the silica sol has been successfully modified with KH560;the mechanical properties,TGA,and laser confocal microscopy,Potentiodynamic polarization,electrochemical impedance and other tests,it can be known that WHC-20 % samples have better performance,better heat resistance,and better mechanical properties and corrosion resistance.