Synthesis and Humidity Controlling Behaviors of Kaolinite/Polyacrylic Acid Composite

Kaolinite/polyacrylic acid composite was synthesized by using inverse suspend polymerization method, and the surface morphology, structure and humidity controlling behaviors of kaolinite/polyacrylic acid composite under different kaolinite content, neutralization degree and crosslinker concentration were analyzed and determined. The results show that kaolinite/ polyacrylic acid composite has a loose and porous surface. With the increasing of kaolinite content in composite, the humidity absorption and desorption ratio under the balance of reduction of moisture absorption component and raising of surface porosity increases firstly and then decreases. The humidity controlling behaviors of composite also rise initially with the increasing of neutralization degree and crosslinker concentration, and then drop down. The optimum preparation parameters are kaolinite content of 10%, neutralization degree of 80% and crosslinker concentration of 0.10%.