纳米碳酸钙改性聚丙烯酸酯乳液的合成与性能研究%Synthesis and properties of nano calcium carbonate modified polyacrylate emulsion
河南省科学院高新技术研究中心,河南 郑州 450002 郑州工业技师学院,河南 新郑 451150 河南省科学院材料研究所,河南 郑州 450046 河南中包科技有限公司,河南 郑州 450002
2025-12-01
纳米碳酸钙 聚丙烯酸酯乳液 改性 合成 性能
以过硫酸铵(APS)为引发剂,烷基酚聚氧乙烯醚(OP-10)和十二烷基硫酸钠(SDS)为复合乳化剂,乙酸乙烯酯(VAC)、丙烯酸乙酯(EA)、丙烯酸丁酯(BA)、甲基丙烯酸(MAA)和甲基丙烯酸羟乙酯(HEMA)为主要单体,氨水为pH调节剂,引入表面改性的纳米碳酸钙(CaCO3)乳液,采用半连续种子乳液聚合法,在一定温度条件下,合成了一种纳米碳酸钙改性聚丙烯酸酯乳液.研究了单体用量、引发剂用量、乳化剂用量、反应温度和纳米碳酸钙用量等因素对聚合物性能的影响.采用傅里叶变换红外光谱对聚合物结构进行了表征,并进行了谱带归属分析.确定了最佳试验条件为:单体用量45%、引发剂用量0.20%、乳化剂用量0.50%、聚合反应温度72℃,纳米CaCO3用量3.0%.后续将深入研究以纳米碳酸钙改性聚丙烯酸酯乳液为基材,开展新型无醛环保木材胶粘剂的制备工艺研究与应用前景.%Using ammonium persulfate(APS)as the initiator,alkylphenol polyoxyethylene ether(OP-10)and sodium dodecyl sulfate(SDS)as the composite emulsifiers,vinyl acetate(VAC),ethyl acrylate(EA),butyl acrylate(BA),methacrylic acid(MAA)and hydroxyethyl methacrylate(HEMA)as the main monomers,ammonia solution as the pH regulator,and introducing surface modified nano calcium carbonate(CaCO3)emulsion,a nano calcium carbonate modified polyacrylate emulsion was synthesized by the semi continuous seed emulsion polymerization method at a certain temperature.The effects of monomer dosage,initiator dosage,emulsifier dosage,reaction temperature,and nano calcium carbonate dosage on polymer properties were investigated.The polymer structure was characterized by using Fourier transform infrared spectroscopy and band assignment analysis was performed.The optimal experimental conditions were determined as follows:monomer dosage of 45%,initiator dosage of 0.20%,emulsifier dosage of 0.50%,polymerization reaction temperature of 72℃,and nano CaCO3 dosage of 3.0%.In the future,the preparation process and application prospects of new formaldehyde-free environmental friendly wood adhesive with nano calcium carbonate modified polyacrylate emulsion as the substrate will be further studied.
