金属盐/PVA材料改性硅胶的制备及性能研究  

Preparation and Performance Study of Metal Salt and PVA Material Modified Silicone

作　　者：马立[1] 罗成龙 MA Li;LUO Cheng-long(School of Civil Engineering and Architecture,Southwest University of Science and Technology,Mianyang 621010,China)

机构地区：[1]西南科技大学土木工程与建筑学院,绵阳621010

出　　处：《武汉理工大学学报》2024年第9期21-28,共8页Journal of Wuhan University of Technology

基　　金：西南科技大学科研基金资助项目(21zx7152)。

摘　　要：硅胶吸湿材料因成本低,理化性质稳定,可循环再生,在固体吸附式除湿空调中得到了应用。但目前普通硅胶存在吸湿量低,吸湿效率差等问题,在实际工程应用中受到了一定限制。对金属盐/PVA复合改性硅胶吸湿材料进行了系统研究,采用气体吸附法测定复合改性硅胶的吸附等温线,通过程序升温脱附技术测定脱附性能曲线,从吸湿量、吸附速率以及脱附活化能等方面分析了吸湿材料吸附与脱附性能。研究结果表明,通过金属盐和PVA材料对普通硅胶进行改性,硅胶吸湿材料的吸湿量与吸附效率明显提高。其中,CaCl_2对硅胶吸附性能提升表现出色,采用CaCl_2与PVA材料制备的C型/CaCl_2复合改性硅胶吸湿材料的吸湿量为0.98 g/g,且基质破裂率较低、再生性能优异,具有较好的应用前景。Silicone hygroscopic materials have been applied in solid adsorption dehumidification air conditioning due to their low cost,stable physical and chemical properties,and recyclability.However,at present,ordinary silicone has problems such as low dehumidification capacity and poor dehumidification efficiency,which are limited in practical engineering applications.This article systematically studied the metal salt/PVA composite modified silica gel hygroscopic material.The adsorption isotherm of the composite modified silica gel was measured by gas adsorption method,and the desorption performance curve was measured by programmed temperature desorption technology.The adsorption and desorption performance of the hygroscopic material were analyzed from the aspects of adsorption amount,adsorption rate,and desorption activation energy.The research results indicate that by modifying ordinary silica gel with metal salts and PVA materials,the adsorption capacity and efficiency of silica gel dehumidification materials are significantly improved.Among them,CaCl_(2) shows excellent performance in improving the adsorption performance of silica gel.The C-type/CaCl_(2) composite modified silica gel hygroscopic material prepared by CaCl_(2) and PVA material has a moisture absorption capacity of 0.98 g/g,and has a low matrix rupture rate and excellent regeneration performance,which has good application prospects.

关 键 词：金属盐 硅胶 吸湿材料 吸附动力曲线 程序升温脱附 脱附活化能 

分 类 号：TU83[建筑科学—供热、供燃气、通风及空调工程]