球形氯化镁-乙醇络合物纳米颗粒的制备及其自组装  

PREPARATION AND SELF-ASSEMBLY OF GLOBAL NANO-PARTICLES OF MgCl_2-CH_3CH_2OH COMPLEX

作　　者：黄启谷[1] 刘智[1] 刘伟娇[1] 义建军 张新莉[1] 高克京 黄海兵[1] 刘伟[1] 甄洪鹏[1] 杨万泰[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、碳纤维及功能高分子教育部重点实验室,北京100029 [2]中国石油石油化工研究院合成树脂重点实验室,北京100083

出　　处：《高分子学报》2012年第8期883-886,共4页Acta Polymerica Sinica

基　　金：国家自然科学基金(基金号21174011);北京市自然科学基金(基金号2102036);中石油创新基金(基金号2011D-5006-0502)资助项目

摘　　要：乙醇与氯化镁按摩尔比为20∶1的比例混合,升温至120℃溶解形成氯化镁醇溶液后,将氯化镁醇溶液冷却至70℃转移至处于搅拌状态的冷却液中,经过滤、正己烷洗涤、干燥后得到球形氯化镁-乙醇络合物纳米颗粒.经TEM表征颗粒粒径在30～100 nm之间.这种氯化镁-乙醇络合物纳米颗粒可在室温自组装,形成纳米线.WAXD结果表明,制备的球形氯化镁-乙醇络合物纳米颗粒的结晶行为受到影响,与纯氯化镁相比,氯化镁-乙醇络合物纳米颗粒的结晶度低.这种氯化镁-乙醇络合物纳米颗粒可作为Ziegler-Natta催化剂的载体材料,制备的催化剂可高效催化乙烯聚合,合成聚乙烯微纳米颗粒.After MgC12 was dissolved in ethanol with the ratio of 1 ： 20 in mole at 120℃ , the solution was cooled to 70℃ and transferred to the cooling liquid consisting of n-hexane （30 mL） and wax （0.3 g） at 0℃. Precipitate was produced. Filtrated and washed with n-hexane, the residue was dried by vacuum at 50℃ , and MgC12-CH3CH2OH particles were obtained. The size of the particles determined by TEM was at the range from 30 nm to 100 nm. The nano-sized particles of MgC12-CH3CH2OH could become nano wires by self-assembly technology at room temperature. WAXD results showed that the crystallinity of the obtained nano-sized MgC12- CH3CH2OH particles became poor,just a broad and weak signal at 2θ = 32° - 35° was observed,while MgC12 showed four sharp signals at 20 = 15° ,30° ,35° and 50°. The obtained particles were useful as support for preparing nano-sized Ziegler-Natta catalysts. It was confirmed that the prepared catalysts may efficiently polymerize ethylene to form polymer particles with 200 - 300 nm or 2 - 4 μm in diameter,respectively.

关 键 词：氯化镁-乙醇络合物 纳米颗粒 载体 ZIEGLER-NATTA催化剂 聚乙烯微纳米颗粒 

分 类 号：TB383.1[一般工业技术—材料科学与工程]