首页|纳米二氧化硅改性水性聚氨酯分散液的制备与表征

纳米二氧化硅改性水性聚氨酯分散液的制备与表征

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采用沉淀和萃取相结合,硅烷偶联剂A-174包裹改性的方法,制备了改性的纳米二氧化硅含量为15％的聚氧化丙烯二醇分散液,并以其直接作为原料,与聚丙二醇(PPG)、异佛尔酮二异氰酸酯(IP DI)、2,2-二羟甲基丙酸(DMPA)、三羟甲基丙烷(TMP)、三乙胺(TEA)、乙二胺(EDA)等其他原料,制备了一系列纳米SiO2粒子改性WPU样品.讨论了改性纳米SiO2加入量对乳液和涂膜性能的影响.研究表明:纳米SiO2聚醚二元醇分散液与预聚物发生了反应,纳米Si02均匀分散在预聚物中,乳化后,纳米SiO2粒子在水性聚氨酯中分散性变好,纳米SiO2用量为预聚物质量的2.0％时,得到了稳定的纳米二氧化硅水性聚氨酯分散液,复合涂膜的断裂伸长率为300％,拉伸强度为13 MPa,耐水性、硬度、热稳定性得到较大的提高.
Preparation and Characterization of Nano-Silica Modified Waterborne Polyurethane Dispersion
By using a combination process of precipitation and extraction and modification by silane coupling agent A174,a 15％ nano-silica polyether diol dispersion was prepared,which was directly used as raw material to react with polyether diol (poly(propylene glycol)),isophorone diisocyanate (IPDI),2,2-Dimethylol propionicacid (DMPA),trimethylol propane (TMP),triethylamine (TEA),ethylene diamine (EDA) to synthsize a serious of modified WPU samples with different nano-SiO2 particle content.The influence of the amount of nanoSiO2 on the properties of emulsion and coating film was studied.The results showed that the nano-SiO2 modified polyether diol and prepolymer were reacted; the dispersion of modified SiO2 in the waterborne polyurethane was good when the amount of nano-Si02 was 2％ of prepolymer,leading a stable waterborne polyurethane dispersion,with a film elongation at break 300％,tensile strength 13 MPa,and improved water resistance,hardness,thermal stability.

nano-silicawaterborne polyurethaneprecipitation and extraction process

陈永军、卿宁、赵燕、侯发秋、何金文

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五邑大学化学与环境工程学院,广东江门529020

纳米二氧化硅 水性聚氨酯 沉淀和萃取法

广东高校科技创新重点项目资助广东高校优秀青年创新人才培养计划项目资助江门市科技计划项目资助广东高校轻化工清洁生产工程技术研究中心开发课题基金

CXZD1128LYM11124

2014

涂料工业
中海油常州涂料化工研究院中国化工学会涂料涂装专业委员会

涂料工业

CSTPCDCSCD北大核心
影响因子：0.66
ISSN：0253-4312
年,卷(期)：2014.44(1)
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