摘要
利用透射电镜(TEM)和X射线衍射(XRD)法,通过与水解聚马来酸(HPMA)对磷酸钙晶体析出的对比研究,初步揭示了双亲水嵌段共聚物马来酸酐-烯丙氧基聚乙烯氧基羧酸钠(MA-b-APEC)阻止磷酸钙晶体析出的作用机理。TEM表明,MA-b-APEC在阻止磷酸钙垢析出时MA-b-APEC分子存在自组装且形成水溶性的壳核结构,MA链段中的羧基与钙作用后形成相应的核,亲水性强的聚乙烯氧基长侧链形成相应的壳。XRD研究表明,在MA-b-APEC作用下,磷酸钙晶体有着择优取向生长的趋势。研究显示,聚合物MA-b-APEC可以充当循环水用良好的阻磷酸钙阻垢剂。
By means ofcontrastive studies of inhibition calcium phosphate in the presence ofhydrolyzed poly-maleic anhydride （HPMA）, inhibition mechanism towards calcium phosphate in the presence of a double-hydrophilic block copolymer maleic anhydride-block-sodium allylpolyethoxy carboxylate （MA-b-APEC） was investigated with transmission electron microscope （TEM） and X-ray diffraction （XRD）. TEM investigations showed that MA-b-APEC self-assembles to form a core-shell structure to prevent calcium-phosphate precipitation. The core was composed of insoluble blocks because of interaction between calcium ions and MA carboxyl groups, and the shell was composed of soluble blocks because of high hydrophilic poly （ethylene oxygen） long side-chains. XRD studies showed that there exists a preferred orientation of the trend growth of calcium phosphate crystals. In this investigation, the results confirmed that the polymer MA-b-APEC could be a superior inhibitor for calcium-phosphate deposits in industrial cooling-water systems.
出处
《水处理技术》
CAS
CSCD
北大核心
2011年第10期42-45,共4页
Technology of Water Treatment
基金
国家自然科学基金(50978137)
江苏省自然科学基金(BK2011692)
关键词
双亲水嵌段共聚物
磷酸钙
烯丙氧基聚乙烯氧基羧酸钠
自组装
double-hydrophilic block copolymers
calcium phosphate
sodium allylpolyethoxy carboxylate
self-assembly
