不同交联方式对微硅粉液体地膜的土壤保水性影响  

Effects of Different Crosslinking Methods on Soil Water Retention of Liquid Mulch Film of Microsilica Powde

作　　者：马佳庆 铁生年[1] MA Jia-qing;TIE Sheng-nian(Qinghai University, Qinghai Xining 810016, China)

机构地区：[1]青海大学

出　　处：《广州化工》2019年第15期75-79,共5页GuangZhou Chemical Industry

基　　金：材料复合新技术国家重点实验室(武汉理工大学)开放基金(2017-KF-4);青海省重点实验室项目(2015-Z-Y02,2016)

摘　　要：为研究不同交联方式对微硅粉悬浮液体地膜对土壤保水性影响,实验以戊二醛为交联剂,通过两种交联方式对比了交联方式及聚乙烯醇对微硅粉液体地膜的水蒸气透过率(WVP),吸水率的影响。结果表明:交联剂最佳添加量为0. 075%;在RH=45%环境下,直接交联与预交联复合膜相比,WVP值由3. 35×10-11g·m/Pa·s·m2降低至2. 945×10-11g·m/Pa·s·m2,吸水率由25. 23%降低至20. 52%;在实际应用中,两种复合膜的保水性并较小,但仍具有一定的保水效果。In order to study the effect of different cross-linking methods on the soil water retention of microsilica suspending liquid mulch,glutaraldehyde was used as cross-linking agent,and the effects of cross-linking mode and polyvinyl alcohol on the water vapor transmission rate( WVP) and water absorption of mulch film of micro-silica powder by two kinds of cross-linking methods were compared. The results showed that the optimum addition amount of cross-linking agent was 0. 075%. In RH = 45% environment,the data of the direct cross-linking was lower than that of pre-crosslinked composite film,the WVP value was reduced from 3. 35 ×10-11 g·m/Pa·s·m2 to 2. 945 ×10-11 g·m/Pa·s·m2,and the water absorption rate decreased from 25. 23% to 20. 52%. In practical application,the water retention of the two composite membranes was small,but they still had a certain water retention effect.

关 键 词：交联剂 保水性 水蒸气透过率 吸水率 微硅粉地膜 

分 类 号：TF64[冶金工程—钢铁冶金]