摘要
以生物基麻风树油多元醇(JOL)、异佛尔酮二异氰酸酯(IPDI)、单端双羟基聚二甲基硅氧烷(PDMS)、水性扩链剂2,2-二羟甲基丙酸(DMPA)为原料,采用一锅法制备了功能化麻风树油基聚氨酯预聚体,再通过高速搅拌将其分散在水中,制备了水性功能化麻风树油基聚氨酯涂料(JPU-g-PDMS)。经涂布Q235碳钢表面制备了JPU-g-PDMS涂层。采用FTIR、1HNMR、XPS对样品进行了表征。通过TGA、DSC、水接触角、极化性能测试,考察了PDMS枝接量(以PDMS、IPDI和JOL的总质量计,下同)对JPU-g-PDMS涂层热稳定、疏水和防腐性能的影响。结果表明,随着涂层PDMS枝接量的增加,JPU-g-PDMS涂层的初始分解温度(T_(5%))逐渐升高(183.11~213.25℃)、玻璃化转变温度(T_(g))逐渐提高(–1.52~0.56℃)、疏水性逐渐增强、水接触角逐渐增大(96.42°~99.93°)、腐蚀电位正向偏移。PDMS枝接量2%的JPU-g-PDMS2涂层具有较佳的综合性能,对可见光透过率最高,为92.0%、水接触角为99.92°、T_(5%)为212.53℃、T_(g)为–1.36℃、腐蚀电位为0.20 V(vs.SCE)。
Functionalized jatropha oil-based polyurethane prepolymer was synthesized from bio-based jatropha oil polyol(JOL),isophorone diisocyanate(IPDI),monoterminal dihydroxy polydimethylsiloxane(PDMS),and water-based chain extender 2,2-dihydroxymethylpropionic acid(DMPA)using a one-pot method,and dispersed into water via high-speed stirring to prepare waterborne functionalized jatropha oil-based polyurethane coatings(JPU-g-PDMS),which was further applied to the surface of Q235 carbon steel to obtain JPU-g-PDMS coatings.The samples were characterized by FTIR,1HNMR and XPS.The effects of PDMS grafting content(based on the total mass of PDMS,IPDI and JOL,the same below)on the thermal stability,hydrophobicity and anti-corrosion performance of JPU-g-PDMS coating were evaluated by TGA,DSC,water contact angle and polarization tests.The results showed that with the increase of PDMS grafting content,the initial decomposition temperature(T_(5%))of JPU-g-PDMS coating gradually increased(183.11~213.25℃),the glass transition temperature(T_(g))gradually increased(–1.52~0.56℃),the hydrophobicity improved,and the water contact angle increased(96.42°~99.93°),with the corrosion potential shifted positively.The JPU-g-PDMS2 coating prepared with 2%grafting content of PDMS exhibited the optimal comprehensive properties,with a visible light transmittance of 92.0%,a water contact angle of 99.92°,T_(5%)of 212.53℃,T_(g) of–1.36℃,and a corrosion potential of 0.20 V(vs.SCE).
作者
李新伟
高鸣言
高慧颖
王娜
鞠镭
陈剑冰
LI Xinwei;GAO Mingyan;GAO Huiying;WANG Na;JU Lei;CHEN Jianbing(Liaoning Provincial Key Laboratory for Synthesis and Preparation of Special Functional Materials,Shenyang University of Chemical Technology,Shenyang 110142,Liaoning,China;Shenyang Key Laboratory for New Functional Coating Materials,Shenyang 110142,Liaoning,China;Liaoning SuniChem Co.,Ltd.,Dandong 118003,Liaoning,China)
出处
《精细化工》
2026年第3期494-500,531,共8页
Fine Chemicals
基金
辽宁省教育厅一般项目(LJ212410149032)
辽宁省重点研发项目(2024JH2/102400048)。
关键词
麻风树油基水性聚氨酯涂料
单端双羟基聚二甲基硅氧烷
疏水性
防腐性能
功能材料
jatropha oil-based waterborne polyurethane coatings
single-ended bis-hydroxy polydimethylsiloxane
hydrophobicity
anti-corrosive properties
functional materials
