摘要
以未经预处理的工业级丙烯酸、聚乙烯醇为原料 ,首先通过氯磺酸磺化法在聚乙烯醇分子中引入强亲水性离子基团 ,然后采用静态水溶液聚合法合成了吸盐水率较高、凝胶机械强度较高的的聚丙烯酸钠 -聚乙烯醇硫酸钠互穿网络 (SA-IP -SPS)型保水剂。研究了 SA-IP-SPS型保水剂含量、颗粒大小对南方赤红壤的水分抑蒸发性能和团粒结构的影响 ,比较研究结果表明 ,SA-IP -SPS型保水剂对赤红壤的水分抑蒸发性能和团粒结构改良性能与丙烯酸 -丙烯酰胺交联共聚型保水剂效果相当 ,但明显优于传统的交联聚丙烯酸钠保水剂。
The water retaining agent with interpenetrating networks of sodium acrylate(SA) based superabsorbent and sodium PVA sulfate(SPS) were prepared by the static state aqueous solution polymerization method. The un pretreated industrial acrylic acid and PVA(molecular weight=124000) were used as reaction raw materials. The strong hydrophilic ionic function groups were introduced into PVA molecules through the Chlorosulfonic acid sulfonation method to prepare SPS. The formation of SA IP SPS interpenetrating networks resulted in the improved salt tolerance and mechanical properties of this water retaining agent. In addition the performance of SA IP SPS water retaining agents in improving water holding capacity and amending water stable aggregates of Lateritic Red Soil (from South China) were investigated in detail. The results of the comparison experiment showed that the SA IP SPS water retaining agent was approximate to the AA-AM water retaining agent in applying performances, but they were remarkably superior to SA water retaining agents.
出处
《农业工程学报》
EI
CAS
CSCD
北大核心
2003年第1期28-31,共4页
Transactions of the Chinese Society of Agricultural Engineering
基金
国家自然科学基金项目 (2 0 1 760 0 7)
中国博士后基金项目
