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RISS 인기검색어
- 검색키워드
- 저자 : Sepideh Pourhashem (검색결과 2 건)
- 무료
- 기관 내 무료
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Polymer/Inorganic nanocomposite coatings with superior corrosion protection performance: A review
Sepideh Pourhashem,Farhad Saba,Jizhou Duan,Alimorad Rashidi,Fang Guan,Elham Garmroudi Nezhad,Baorong Hou 한국공업화학회 2020 Journal of Industrial and Engineering Chemistry Vol.88 No.-
Nanocomposite coatings based on adding inorganic nanofillers in polymer matrix are a new class ofcorrosion protection methods which show superior corrosion resistance and mechanical performancecompared to conventional composite coatings. Inorganic nanomaterials such as metal nanopowders,metal oxides, nano-glassflakes, nitrides and carbides, and nano-calcium carbonates have significantpotential for enhancing the barrier performance of polymer coatings. Herein, the effects of the above-mentioned nanomaterials on the corrosion protection performance of polymer coatings are discussedand a comprehensive review about recent studies on the corrosion resistance of these nanocompositecoatings is provided. This review clearly indicates that the characteristics of nanocomposite coatingsstrongly depend on the type of nanoparticles, morphology, size, specific surface area, the fraction ofnanofillers, the chemical structure, the functional groups, and the interaction between nanoparticles andpolymer matrix. The highest corrosion resistance can be achieved via well-dispersion of nanomaterials inthe polymer matrix and there are various approaches based on the fabrication methods and physical/chemical/mechanical surface treatments to reach this goal. In addition, it is meaningful to developnanocomposite coatings through green approaches without altering the intrinsic properties ofnanofillers and without using toxic chemicals for modification of nanofillers.
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Mxene structure: A key parameter in corrosion barrier performance of organic coatings
Ziyang Zhou,Sepideh Pourhashem,Zhengquan Wang,Jiawen Sun,Xiaohong Ji,Xiaofan Zhai,Jizhou Duan,Baorong Hou 한국공업화학회 2022 Journal of Industrial and Engineering Chemistry Vol.116 No.-
In this research, the effects of fresh and oxidized MXene on the surface, adhesion, and corrosion-resistantproperties of waterborne epoxy coatings are considered. The oxidized MXene is prepared through storageof fresh MXene nanosheets in an open vial for 1 month. The results confirm that the waterborne epoxycoating loaded with silane functionalized fresh MXene nanosheets (epoxy/F-MXene) has significantlyhigher barrier performance and anti-corrosion behavior than the sample modified with silane functionalizedoxidized MXene nanosheets (epoxy/F-O-MXene). Indeed, the F-MXene nanosheets (with defectfreeand large two dimensional morphology) are able to effectively inhibit the path of corrosive mediaas well as increment the epoxy matrix compactness compared to the F-O-MXene (with broken nanosheetmorphology composed of TiO2 nanoparticles) due to rapid oxidation of the MXene nanosheets in theenvironment. Besides, the epoxy/F-MXene nanocomposite coating has slightly higher water contact angleand adhesion strength to the metallic substrate compared to the epoxy/F-O-MXene. The results of thisresearch clearly reveal the importance of preventing MXene oxidation before application as nanofillerin the polymer coatings.
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