Inorganic/Organic Hybrids with Controlled Topology and Composition

先前在NSF支持下进行的研究（DMR-9871450）产生了定义明确的有机/无机杂化材料，例如与聚（二甲基硅氧烷）的嵌段和接枝共聚物，含POSS的均聚物和嵌段共聚物，以及连接到弯曲和平坦表面的定义明确的有机聚合物。 这些材料通过受控自由基聚合（CRP）工艺制备，主要使用原子转移自由基聚合（ATRP）。虽然已经报道了将有机聚合物掺入无机基材的各种方法，但高度期望普遍掺入明确定义的（共）聚合物的稳健方法。 ATRP的多功能性是制备杂化物的显著优点，因为可以进行无机基底的容易官能化以使得能够将明确定义的（共）聚合物引入这些材料。 这种方法的潜力是深远的研究人员参与合成的聚合物，胶体，纳米复合材料和修改的平面。 主要策略是将明确定义的有机均聚物和嵌段共聚物共价键合到无机基材上（即，聚合物、颗粒、表面），从而能够精确控制有机和无机组分之间的界面。 特别地，不同组成和摩尔质量的嵌段共聚物将使用CRP技术与无机基材组合。 通过利用不相容嵌段共聚物与无机材料的自组装特性，可以制备结构日益复杂的杂化纳米复合材料。

Previous research conducted under NSF support (DMR-9871450) resulted in well-defined organic/inorganic hybrid materials such as block and graft copolymers with poly(dimethylsiloxane), POSS containing homopolymers and block copolymers, and well-defined organic polymers tethered to curved and flat surfaces. These materials were prepared by controlled radical polymerization (CRP) processes, primarily using atom transfer radical polymerization (ATRP).%%%While various methods to incorporate organic polymers to inorganic substrates have been reported, robust methods to universally incorporate well-defined (co)polymers are highly desirable. The versatility of ATRP is a significant advantage to prepare hybrids, as facile functionalization of inorganic substrates can be performed to enable introduction of well-defined (co)polymers to these materials. The potential of such an approach is far reaching to researchers involved in synthesis of polymers, colloids, nanocomposites and modification of flat surfaces. The primary strategy is to covalently bond well-defined organic homopolymer and block copolymers to inorganic substrates (i.e., polymers, particles, surfaces) enabling precise interfacial control between organic and inorganic components. In particular, block copolymers of varying composition and molar mass will be combined with inorganic substrates using CRP techniques. Hybrid nanocomposites of increasing structural complexity will be prepared by utilizing the self-assembly properties of incompatible block copolymers attached to inorganic materials.