Surface-initiated polymerization from TiO2 nanoparticle surfaces through a biomimetic initiator:: A new route toward polymer-matrix nanocomposites
Surface-initiated polymerization from TiO2 nanoparticle surfaces through a biomimetic initiator:: A new route toward polymer-matrix nanocomposites
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DOI：
10.1016/j.compscitech.2005.10.001
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发表时间：
2006-07-01
影响因子：
9.1
通讯作者：
Messersmith, Phillip B.
中科院分区：
文献类型：
--
作者：
Fan, Xiaowu;Lin, Lijun;Messersmith, Phillip B.
通过表面引发聚合（SIP）策略将 TiO2 纳米颗粒接枝聚甲基丙烯酸甲酯（PMMA）制备了核壳结构的聚合物纳米复合材料。受贻贝粘附蛋白 (MAP) 关键成分 L-3,4-二羟基苯丙氨酸 (DOPA) 启发，设计并合成了一种双功能聚合引发剂，用于氧化物表面的 SIP。仿生引发剂从水溶液中自发吸附到TiO2上，形成胶体引发剂体系，引发剂含量约为6.8 wt%。随后表面引发的原子转移自由基聚合 (SI-ATRP) 的原位激活产生了与 TiO2 纳米粒子核相连的 PMMA 聚合物壳层。结果证明了制备聚合物功能化金属氧化物纳米颗粒的可行仿生策略，该策略可用于构建功能性聚合物纳米复合材料。 (c) 2005 Elsevier Ltd. 保留所有权利。
Polymer nanocomposites of core-shell structure were prepared by grafting poly(methyl methacrylate) (PMMA) from TiO2 nanoparticle via the surface-initiated polymerization (SIP) strategy. A bifunctional polymerization initiator inspired by L-3,4-dihydroxyphenylalanine (DOPA), a key constituent of mussel adhesive proteins (MAPs), was designed and synthesized for use in SIP from oxide surfaces. The biomimetic initiator spontaneously adsorbed to TiO2 from aqueous solution, resulting in a colloidal initiator system with the initiator content of approximately 6.8 wt%. Subsequent in situ activation of the surface-initiated atom transfer radical polymerization (SI-ATRP) gave rise to PMMA polymer shell layers tethered to TiO2 nanoparticle cores. The results demonstrate a viable biomimetic strategy toward the preparation of polymer functionalized metal oxide nanoparticles that may be useful for construction of functional polymer nanocomposites. (c) 2005 Elsevier Ltd. All rights reserved.