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Synthesis of Well-Defined Amphiphilic Diblock Copolymer Brushes on Halloysite Nanotubes via Surface-Initiated Reversible Addition-Fragmentation Chain Transfer Polymerization

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The structurally well-defined diblock copolymer, poly(methyl methacrylate)-b-poly(N-isopropyl-acrylamide) (PMMA-b-PNIPAM) amphiphilic diblock copolymer was successfully grafted onto the surface of Halloysite nanotubes (HNTs) via reversible addition-fragmentation chain transfer (RAFT) polymerization. In this approach, S-benzyl S′-trimethoxysilylpropyltrithiocarbonate was first immobilized onto the HNTs as the RAFT agent. The polymerization of MMA and NIPAM was then initiated and propagated on the HNTs surface by RAFT polymerization. The chemical structure and morphology of diblock copolymer grafted onto the HNTs surface were ascertained by FT-IR, and FE-SEM analyses. A moderate degree of functionalization of HNTs by polymer chains was obtained according to TGA results. This study has suggested a facile approach to prepare surface functionalized HNTs via RAFT polymerization, which is promising to open up a wider prospect for the fabrication and novel application of hybrid polymeric materials with diverse functionalities.
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Keywords: Amphiphilic Diblock Copolymer; Grafting From; Halloysite Nanotubes; RAFT Polymerization

Document Type: Research Article

Affiliations: 1: Nguyen Tat Thanh University, Ho Chi Minh City, 700000, Vietnam 2: Hochiminh City University of Natural Resources and Environment, 70500, Vietnam 3: Pukyong National University, Busan, 608-737, Republic of Korea

Publication date: August 1, 2017

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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