磷酸二氢根插层水滑石的制备及其选择性红外吸收性能  

Dihydrogen Phosphate Anion-Intercalated Layered Double Hydroxides: Synthesis and Selective IR Absorption Effect

作　　者：王丽静[1] 徐向宇[1] David G.Evans 李殿卿[1] 

机构地区：[1]北京化工大学化工资源有效利用国家重点实验室,北京100029

出　　处：《无机化学学报》2010年第6期970-976,共7页Chinese Journal of Inorganic Chemistry

基　　金：国家自然科学基金(No.20971013)资助项目;长江学者和创新团队发展计划;高等学校学科创新引智(111)计划的支持

摘　　要：采用成核/晶化隔离法制备了镁铝碳酸根型水滑石(MgAl-CO3-LDHs),以其为前驱体,在酸性条件下通过离子交换将磷酸二氢根阴离子组装到水滑石层间,制备了具有超分子插层结构的MgAl-H2PO4-LDHs,并采用XRD、FTIR、TG-DTA-DTG、SEM和ICP等手段进行了表征。采用母粒工艺将MgAl-CO3-LDHs和MgAl-H2PO4-LDHs添加到聚乙烯(PE)中制备了LDHs/PE薄膜,研究其红外吸收性质发现,添加MgAl-H2PO4-LDHs的PE薄膜在7～25μm特别是9～11μm范围的红外吸收率明显高于添加MgAl-CO3-LDHs的薄膜,表现出显著的选择性红外吸收性能。MgAl-CO3-LDHs precursor was prepared by a method involving separate nucleation and aging steps （SNAS）. And then the intercalated magnesium-aluminum layered double hydroxide MgAl-H2PO4-LDHs with supramolecular structure was prepared by reaction of sodium dihydrogen phosphate in acidic condition with the precursor. The resulting MgAl-H2PO4-LDHs was characterized by XRD, FTIR, TG-DTA-DTG, elemental analysis and SEM. MgAl-CO3-LDHs and MgAl-H2PO4-LDHs were mixed with low density polyethylene （LDPE） using a masterbatch method. PE films filled with MgAl-H2PO4-LDHs show a higher infrared absorption than films filled with MgAl-CO3-LDHs in the range of 7 ～25 μm, especially in the key range （9 ～11 μm） required for application in agricultural plastic films.

关 键 词：水滑石 插层 磷酸二氢根 选择性红外吸收性能 聚乙烯薄膜 

分 类 号：O614.22[理学—无机化学] O614.31[理学—化学]