Block Copolymer-Based Nanocomposites with Exotic Self-Assembled Structures Induced by a Magnetic Field

Hiroaki Wakayama; Hirotaka Yonekura

Macromolecular Research, Vol.25, No.3, 201-205, March, 2017

DOI10.1007/s13233-017-5036-6 Export Citation

Block Copolymer-Based Nanocomposites with Exotic Self-Assembled Structures Induced by a Magnetic Field

Hiroaki Wakayama^†, and Hirotaka Yonekura

Toyota Central R&D Laboratories, Inc., 41-1, Yokomichi, Nagakute, Aichi 480-1192, Japan

E-mail:

Structural control of polymer nanocomposites is important for their applications in organic semiconductors, lithographic nanopatterning, separation membranes, and nanofabrication templates. However, manufacturing nanocomposite materials with novel structures in a highly efficient yet precise manner remains a great challenge. To create nanocomposite structures, we combined self-assembly processing of block copolymer (BCP)-metal complex nanocomposites with an applied magnetic field. Here, we describe in detail the mechanism of magnetic alignment of block copolymers doped with metal complexes; specifically, we investigated the effect of the applied magnetic field on the phase behavior of the assembled block copolymer-metal complex nanocomposites with various molecular weights and with different molecular structures. We show that our combination of self-assembly processing and application of a magnetic field yielded lamellar structures of alternating multilayers with different layer thicknesses. This self-assembled structure is not included in phase diagrams of BCPs. The influence of the block copolymers’ molecular structures on the nanocomposites’ phase transformation behavior is also discussed. Our results provide a route to manufacturing nanocomposite materials in a highly efficient yet precise manner, which could lead to improvement in the material properties of nanocomposites.

Keywords:magnetic alignment;block copolymer;metal complex;self-assembly;nanocomposite

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[1] Krasteva N, Bes-nard I, Guse B, Bauer RE, Mullen K, Yasuda A, Vossmeyer T, Nano Lett., 2, 551 (2002)

[2] Trindade T, O’Brien P, Pickett NL, Chem. Mater., 13, 3843 (2001)

[3] Galow TH, Drechsler U, Hanson JA, Rotello VM, Chem. Commun., 10, 1076 (2002)

[4] Cuello NI, Elias VR, Torres CER, Crivello ME, Oliva MI, Eimer GA, Microporous Mesoporous Mater., 203, 106 (2015)

[5] Ranjbar B, Nazockdast H, J. Appl. Polym. Sci., 132, 41753 (2015)

[6] Salehi-Khojin A, Hosseini MR, Jalili N, Compos. Sci. Technol., 69, 545 (2009)

[7] Rivoirard S, J. Min. Met. Mater. Soc., 65, 7901 (2013)

[8] Wang K, Zhang Q, Fu Q, Acta Polym. Sin., 5, 586 (2013)

[9] Fujihara T, Cho HB, Kanno M, Nakayama T, Suzuki T, Jiang W, Suematsu H, Niihara K, Jpn. J. Appl. Phys., 53, 02BD12 (2014)

[10] Park W, Emoto K, Jin YH, Shimizu A, Tamma VA, Zhang W, Opt. Mater. Exp., 3, 205 (2013)

[11] Xu KL, Guo RH, Dong BJ, Yan LT, Soft Matter, 8, 9581 (2012)

[12] Jang YJ, Kim DH, Chem.-Eur. J., 17, 540 (2011)

[13] Xia Y, Zhang WK, Huang H, Gan YP, Tian J, Tao XY, J. Power Sources, 196(13), 5651 (2011)

[14] Sanchez-Gaytan BL, Li S, Kamps AC, Hickey RJ, Clarke N, Fryd M, Wayland BB, Park SJ, J. Phys. Chem. C, 115, 7836 (2011)

[15] Wakayama H, Yonekura H, Kawai Y, ACS Macro Lett., 2, 284 (2013)

[16] Wakayama H, Yonekura H, Mater. Lett., 171, 268 (2016)

[17] Sadron C, Allot B, Makromol. Chem., 164, 301 (1973)

[18] Ishizu K, Bessho K, Fukutomi T, Kakurai T, Makromol. Chem. Rapid Commun., 4, 163 (1983)

[19] Maqbool Q, Reddy A, Goswami MS, Konar S, Srivastava A, J. Mater. Chem. A, 2, 2609 (2014)

[20] Elmaci A, Hacaloglu J, Kayran C, Sakellariou G, Hadjichristidis N, Polym. Degrad. Stabil., 94, 2023 (2009)