水玻璃凝胶对植物纤维发泡材料抗压强度的研究Ⅰ.凝胶合成的工艺优化  

Effects of sodium silicate gel on compressive strength for plant fiber-based foaming composite Ⅰ.Optimization of processing parameters during gel synthesis

作　　者：林振[1] 牛敏[1] 谢拥群[1] 

机构地区：[1]福建农林大学材料工程学院,福建福州350002

出　　处：《福建林学院学报》2013年第3期253-257,共5页Journal of Fujian College of Forestry

基　　金：国家自然科学基金资助项目(30871982);国家"十一五"科技支撑计划资助项目(2008BADA9B01)

摘　　要：为了增强植物纤维发泡材料的抗压强度,采用响应面法对溶胶—凝胶法增强植物纤维发泡材料工艺进行优化,并对影响材料抗压强度的pH值、二氧化硅浓度和水玻璃添加量3个因素进行探讨。结果表明:(1)各因素间均具有较强的交互作用,且对抗压强度影响的主次顺序为水玻璃添加量>二氧化硅浓度>pH值;(2)优化工艺条件:二氧化硅浓度为0.7mol.L-1,水玻璃凝胶添加量为55%,pH值为6,且在此条件下得到材料的抗压强度为50.1 kPa;(3)抗压强度与各因素的关系模型可表示为:Y=46.61+4.17A-0.30B+2.78C-0.60AB-0.73AC-0.72BC-2.57A2-0.89B2-0.77C2,R2=0.998 7,该模型拟合程度较好。The response surface method was used to optimize the process of sol-gel enhanced plant fiber-based foaming composite,meanwhile,the influence of the three factors such as pH value,silicon dioxide concentration and addition of sodium silicate on compressive strength was discussed.The results suggested as follows：（1） The interaction among these factors was more significant,and the primary and secondary sequence of the effects of these factors on the compressive strength was orderly the adding amount of sodium silicate,silicon dioxide concentration and pH value;（2） The optimized processing conditions were as follows： the concentration of silica was 0.7 mol · L-1,addition content of sodium silicate was 55% and pH value was 6,when the corresponding compressive strength of the material was 50.1 kPa;（3） The model of the relationship between the factors and the compressive strength could be expressed as： Y=46.61＋4.17A-0.30B＋2.78C-0.60AB-0.73AC-0.72BC-2.57A2-0.89B2-0.77C2,and the related coefficient R2 was 0.998 7,so the fitting degree was better.

关 键 词：植物纤维发泡材料 响应面法 溶胶—凝胶法 抗压强度 

分 类 号：TS653.929[轻工技术与工程]