Using ammonium ceric nitrate and N,N’ methylene bis acrylamide as an initiator and cross linkage agent respectively, a super absorbent was prepared by graft polymerization of acrylamide on starch at the presence of c...Using ammonium ceric nitrate and N,N’ methylene bis acrylamide as an initiator and cross linkage agent respectively, a super absorbent was prepared by graft polymerization of acrylamide on starch at the presence of clay suspension, followed by hydrolyzing. The water absorbency of the sample is 4 000(g H 2O/g dry sample). The influences of the kind of clay, content of clay, cross linkage agent on absorbent properties are discussed in this paper. The results show that clay powder, as a kind of functional filler, enhances comprehensive absorbent property of the composites.展开更多
The wollastonite pulverized activated by supersonic speed airflow substitutes for white carbon as a strengthening agent to rubber.The microstructures on surface of such developed wollastonite powder and microstructure...The wollastonite pulverized activated by supersonic speed airflow substitutes for white carbon as a strengthening agent to rubber.The microstructures on surface of such developed wollastonite powder and microstructures on interface of rubber/wollastonite composite material have been researched by scanning electron microscope and infrared absorption spectroscopy.The mechanism of mechanicaochemical activation on wollastonite and crosslinking mechanism on inerface of rubber/wollastonite composite material have been revealed by the results of research.展开更多
文摘Using ammonium ceric nitrate and N,N’ methylene bis acrylamide as an initiator and cross linkage agent respectively, a super absorbent was prepared by graft polymerization of acrylamide on starch at the presence of clay suspension, followed by hydrolyzing. The water absorbency of the sample is 4 000(g H 2O/g dry sample). The influences of the kind of clay, content of clay, cross linkage agent on absorbent properties are discussed in this paper. The results show that clay powder, as a kind of functional filler, enhances comprehensive absorbent property of the composites.
文摘The wollastonite pulverized activated by supersonic speed airflow substitutes for white carbon as a strengthening agent to rubber.The microstructures on surface of such developed wollastonite powder and microstructures on interface of rubber/wollastonite composite material have been researched by scanning electron microscope and infrared absorption spectroscopy.The mechanism of mechanicaochemical activation on wollastonite and crosslinking mechanism on inerface of rubber/wollastonite composite material have been revealed by the results of research.
文摘以4A沸石和天然蛭石为载体,钛酸四丁酯为钛源,采用溶胶-凝胶法制备了TiO2/4A沸石和TiO2/天然蛭石光催化复合材料,研究了复合材料对偶氮染料甲基橙的暗态吸附规律和光降解性能。结果表明:复合材料对甲基橙的吸附规律都较好地符合Langmu ir和Freund lich吸附等温模型;在紫外光辐照30 m in条件下,TiO2/4A沸石和TiO2/天然蛭石光催化材料对6.11×10-5mol/L的甲基橙水溶液的脱色率分别达到78.5%和84.6%,比同种方法制备的纯TiO2(68%)高,而且对甲基橙光催化反应可用一级反应动力学方程进行描述。
