氢氧化镁等无机颗粒在有机聚合物中无机-有机表面能/极性适配性研究

项目名称： 氢氧化镁等无机颗粒在有机聚合物中无机-有机表面能/极性适配性研究

项目编号： No.21476045

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 化学工业

项目作者： 宁桂玲

作者单位： 大连理工大学

项目金额： 50万元

中文摘要： 资源高效利用研究已成为国家战略。我国镁资源储量占世界第一，氢氧化镁等无机颗粒来源广泛，特性突出，在有机聚合物填料等方面显示出潜在发展空间。但因为这类无机颗粒的亲水疏油性、表面极性和较大添加量，导致添加后复合物力学性能显著下降等问题。本项目基于表面能等理论，在实验基础上提出用表面能适配性调控无机颗粒在有机聚合物中分散性，用表面极性适配及适配（改性）分子结构调控颗粒与聚合物结合强度，进而调控复合聚合物力学性能的思路。研究氢氧化镁颗粒表面能及表面极性调控规律、颗粒表面能和表面极性对其在聚合物中分散性及相互亲和性影响关系、颗粒表面与适配分子结合稳固性控制规律、无机-有机表面能/极性适配性及适配分子结构对复合聚合物力学性能调控关系等；揭示表面能、表面极性及适配分子结构等诸因素对复合聚合物力学性能提升机理。本研究为发展相界面上无机分子与有机分子相互作用理论提供实验依据；为提升镁资源价值提供理论指导。

中文关键词： 氢氧化镁；表面改性；有机聚合物；表面能；表面极性

英文摘要： Highly efficient utilization of natural resources has become a national strategy. Based on the fact that our domestic reserve of magnesium resources ranked top one in the world,this project focused on the matching problem of magnesium hydrate inorganic particles in organic polymer matix.Magnesium hydroxide,including brucite and those converted from hydromagnesite and/or magnesive, displays the marvelously potential future in the field of polymer fillers. However, the hydrophilicity, surface polarity and high loading level lead to the decrease of mechanical properties of polymer composites.This project proposed a novel strategy to control and adjust the mechanical properties of polymer composites based on the adaptation of surface free engergy theory. In detail, regularities on controlling the surface free energy and surface polarity of magnesium hydroxide particles and the dependent relationes between their surface free energy and dispersity in polymers would be systematically investigated. The bonding strength between the particles and adaptive molecules would also be examined. Furthermore, the relationship between molecular structure for proper surface free energy and mechanical properties of polymer composites would be detailedly analyzed. The mechanism on improvement of mechanical properties of polymer compo

英文关键词： magnesium hydroxide；surface modification；organic polymer；surface free energy；surface polarity