聚丙烯酸酯改性硅溶胶的合成及其应用性能

Synthesis and application performance of polyacrylate modified silica sol

为开发一种新型的超疏水整理剂,以甲基三甲氧基硅烷(MTMS)为原料,采用溶胶-凝胶法制备硅溶胶,再用由丙烯酸十二烷基酯(LA)、丙烯腈(AN)和3-甲基丙烯酰氧基丙基三甲氧基硅烷(KH570)合成的聚合物对其进行改性,制备了一种聚丙烯酸酯改性硅溶胶(PLAKS),并将其用于涤纶织物超疏水整理。采用傅里叶红外光谱仪、原子力显微镜以及接触角测量仪等对PLAKS的结构及应用性能进行表征。结果表明:当LA、AN和KH570的质量比为20∶10∶0.6,MTMS质量分数为20%(相对LA、AN和KH570总质量),氨水(25%)质量分数为12%(相对LA、AN和KH570总质量)时,制得PLAKS,用其整理的涤纶织物能获得超疏水效果,接触角为151.3°,疏水等级为100分,抗静水压等级为5级;经15次水洗后,接触角为131.4°,疏水等级为90分,抗静水压等级为4级,说明PLAKS整理后涤纶织物的疏水性具有较好的耐洗性。

In order to develop a new type of superhydrophobic finishing agent, silicon sol was prepared by sol-gel method using methyltrimethoxysilane （MTMS） as raw material. It was then modified by synthetic polymers prepared from lauryl acrylate （LA）, acrylonitrile （AN） and 3-methacryloxypropyltrimethoxysilane （KH 570）. Finally polyacrylate modified silicon sol （PLAKS） was successfully obtained, and was applied to super hydrophobic finishing of polyester fabrics. The structure of the PLAKS and application performance were investigated by Fourier transform infrared spectrum（ FT-IR） , atomic force microscope（AFM） and contact angle meter, respectively. The results show that PLAKS is obtained when mass ratio of LA to AN to KH570 is 20：10：0.6, the amount of MTMS is 20 % （in terms of the whole mass of LA, AN and KH570）, ammonia （with the mass content of 25%） is 12 %（in terms of the whole mass of LA, AN and KH570, and the treated fabric surface achieveds superhydrophobicity. The water contact angle of the treated fabric is 151.3° , the hydrophobic rating is 100, and the hydrostatic pressure resistance rating is 5.After washing for 15cycles, the water contact angle of the fabric is 134.4°, the hydrophobic rating is 90, and the hydrostatic pressure resistance rating is 4. It is indicated that the hydrophobicity of PLAKS treated fabric is washable.