改性有机硅及其竹基材料的制备条件

通过试验筛选出合成有机硅树脂的较佳条件,并且通过聚氨酯与有机硅树脂的共混得到改性有机硅树脂,将所得改性有机硅树脂应用于竹基材料的表面涂装,以获取最佳的改性有机硅竹基材料的制备条件.结果表明：有机硅树脂的合成最佳条件为以苯基三甲氧基硅烷与甲基二甲氧基硅烷为合成单体,且两单体的体积之比为1.5,水解温度为55 ℃,水解时间为2.5 h,w（HCl）：w（Si——OR）,w（H2O）：w（Si——OR）,w（H2O）：w（二甲苯）：w（丙酮）分别为0.002 00,10：3和8：4：1;改性硅树脂竹基材料的最佳制备条件为聚氨酯与硅氧烷的添加质量分数为树脂总质量的12.5%,固化剂用量为树脂总质量的24.5%,并于80 ℃条件下烘烤3 h;红外光谱分析表明,有机硅树脂在—Si—O—Si—有较宽的吸收峰;耐化学腐蚀性试验结果表明,所合成的有机硅改性树脂漆膜具有很好的耐化学腐蚀性能.

The Preparation Condition of Modified Silicone and Corresponding Bamboo Base Materials

The better condition for synthesizing organic silicon resin is selected through experiments. The modifiedsilicone resin is obtained by blending polyurethane with silicone resin. The optimal condition for preparing modifiedsilicone bamboo base materials is studied by applying the modified organic silicone resin to the surface coating of bamboobase materials. Results show that the optimal condition for the synthesis of organic silicon resin is as follows： phenyl 3armour oxygen radicals silane and methyl dimethoxy silane for the synthesis of monomer, with the volume of the twomonomer ratio of 1.5, hydrolysis temperature of 55 ℃, hydrolysis time of 2.5 h, HCl/Si-OR,H2O/Si-OR,water,xylene, acetone, the quality of the ratio respectively at 0.002 00, 10/3 and 8：4：1; Best preparation condition of modifiedsilicone of bamboo base materials is the added quality score of polyurethane and siloxane accounting for 12.5% of the resintotal mass, dosage of curing agent is 24.5% of the total quality of resin, and baking for 3 h at 80 ℃ condition; IR spectrashows that organic silicon resin has wide—Si—O—Si—absorption peak; Resistance to chemical corrosion testresults show that the synthesis of organic silicone modified resin paint film has good resistance to chemical corrosion.