FINE CHEMICALS 1003-5214 2023 40 8 article 氧化石墨烯-水性環氧樹脂固化劑的制備及性能 Preparation and properties of GO - water based epoxy resin curing agent 以三乙烯四胺(TETA),氧化石墨烯(GO),環氧樹脂E44、三羥甲基丙烷三縮水甘油醚(TPEG)、甲基聚氧乙烯環氧基醚(MEH)和γ-(2,3-環氧丙氧)丙基三甲氧基硅烷(KH560)為原料,采用原位聚合法首先將TETA與GO球磨分散,使TETA與GO通過共價鍵相連,然后依次滴加E44、TPEG、MEH和KH560合成氧化石墨烯-水性環氧樹脂固化劑(TGO-WPEA),再與環氧樹脂乳液(Epikote-6520)復合制得氧化石墨烯改性水性環氧樹脂防腐涂料(TGO-EP)。通過FTIR、XPS和XRD對納米材料進行結構表征,采用電化學測試和鹽霧實驗對復合涂層TGO-EP的防腐性能進行了研究。結果表明,固化劑分子通過共價鍵連接到GO表面,改善了GO在環氧樹脂中的分散穩定性和接枝率,提高了TGO-EP復合涂料對腐蝕介質的屏蔽性能。與EP涂層相比,其腐蝕電位從-0.267mV提高到-0.125mV,腐蝕電流密度從5.44×10-8減小到1.09×10-8 A/cm2;EIS測試表明,浸泡20d后,TGO-EP仍具有最高的低頻阻抗。 The graphene oxide modified epoxy resin curing agent (TGO-WPEA) is synthesized by situ polymerization method which firstly form a covalent bond between triethylenetetramine (TETA) and graphene oxide (GO) by ball milling, and then epoxy resin E44, trihydroxymethyl propane triglycidyl ether (TPEG), Methyl polyoxyethylene epoxy ether (MEH) and γ-(2, 3-propylene oxide) propyl trimethoxy silane (KH560) are added successively. Graphene oxide modified waterborne epoxy resin anti-corrosion coating (TGO-EP) is prepared by the combination of TGO-WPEA and epoxy resin emulsion (Epikote-6520). The structure of TGO nanomaterials is characterized by FTIR, XPS and XRD. The corrosion resistance of the composite coating is characterized by electrochemical test and salt spray test, and the physical properties of the coating are tested. The results showed that: the curing agent molecules are covalently linked to the GO surface and the layer spacing of GO is improved. The TGO-EP composite coating prepared by intercalation polymerization has higher anti-corrosion performance. Compared with the pure EP coating, the corrosion potential of TGO-EP composite coating is increased from -0.267 mV to -0.125 mV. The corrosion current density decreased from 5.44×10-8 to 1.09×10-8 A/cm2. The EIS test showed that TGO-EP still had the highest impedance radius and no quadratic time constant after 20 days of immersion. 水性環氧涂料;氧化石墨烯;防腐;插層聚合;附著強度 waterborne Epoxy coating; anticorrosion; graphene oxide; intercalation polymerization; 朱科,李菁熠,王永強,費貴強 ZHU Ke,LI Jingyi,Wang Yongqiang and Fei Guiqiang 1.渭南師范學院化學與材料學院;2.陜西科技大學化學化工學院 1.College of Chemistry and Materials,Weinan Normal University,Weinan,;2.China;3.Key Laboratory of Auxiliary Chemistry Technology for Chemical Industry,Ministry of Education Shaanxi University of Science Technology,Xi’an,;4.College of Chemistry and Materials,Weinan Normal University,Weinan;5.Key Laboratory of Auxiliary Chemistry Technology for Chemical Industry,Ministry of Education Shaanxi University of Science Technology,Xi’an jxhg/article/abstract/202209190859
2021国产麻豆剧果冻传媒免费_久久国产成人美女_9热精品视频在线观看_欧美A级毛欧美1级A大片
<rp id="vlnnu"></rp>
<em id="vlnnu"></em>
<rp id="vlnnu"></rp>
    1. <progress id="vlnnu"></progress><tbody id="vlnnu"></tbody>
    2. <button id="vlnnu"><acronym id="vlnnu"></acronym></button>
    3. <tbody id="vlnnu"></tbody>
      <tbody id="vlnnu"></tbody>