高分子論文集
Online ISSN : 1881-5685
Print ISSN : 0386-2186
ISSN-L : 0386-2186
71 巻, 10 号
選択された号の論文の6件中1~6を表示しています
総合論文
一般論文
  • 黒岩 敬太, 日熊 千春, 下川 祥史, 鉢迫 博, 櫻井 伸一
    2014 年 71 巻 10 号 p. 457-466
    発行日: 2014/10/25
    公開日: 2014/10/24
    ジャーナル フリー
    本報では,カルボン酸を有する両親媒性N-イソプロピルアクリルアミド(NIPAAm)重合体の集合挙動,ならびにさまざまな金属イオン・金属錯体との複合化について検討した.とくに重合度の低い領域のNIPAAm重合体においては,カルボン酸のプロトン化/脱プロトン化が効果的に働き,下限臨界共溶温度(LCST)の温度範囲ならびにLCSTの有無を制御できることがわかった.さらにNIPAAm重合体に金属イオンを添加すると,ナノファイバーやベシクルネットワークなどを形成できることが明らかとなった.また,Cu2+の金属イオンは,NIPAAmオリゴマー水溶液中で,LCST型相転移により色調の変化をもたらす金属イオンの配位構造の変化が見られた.すなわち,NIPAAmオリゴマーの相転移現象を利用して配位構造を制御することができるような金属イオンが存在しており,その電子状態をも制御することができることが示唆された.
ノート
  • 白石 幸英, 田中 誠, 澤井 寛哉, 大木 妙子, 戸嶋 直樹
    2014 年 71 巻 10 号 p. 467-470
    発行日: 2014/10/25
    公開日: 2014/10/24
    ジャーナル フリー
    Nanoparticles stabilized by organic molecules have been receiving much attention for a decade because of their characteristic size between metal ions or atoms and bulk metal as well as their novel properties, which are expected to be applied to various fields. The merging of metal nanoparticles or nanotechnology in a wide sense into self-assembled systems such as liquid crystal displays (LCDs) may attract the attention of researchers who are interested in inaugurating new combinations of different fields. This study aims to synthesize poly(β-cyclodextrin)-stabilized zirconia nanoparticles and to use them in novel display materials. Poly(β-cyclodextrin)-stabilized zirconia nanoparticles prepared by an ultrasonic and microwave method have an average diameter of 1.6 nm. The response of twisted nematic cells in the presence of nanoparticles prepared by this method was faster than with nanoparticles prepared by the solvothermal method.
  • 只野 剛, 鈴木 晶太, 朱 睿, 星 徹, 佐々木 大輔, 萩原 俊紀, 澤口 孝志
    2014 年 71 巻 10 号 p. 471-474
    発行日: 2014/10/25
    公開日: 2014/10/24
    ジャーナル フリー
    A transparent hybrid film with hydroxypropylcellulose (HPC, Mw: 1.0×105) and silica particles (SiO2, average diameter: 12.3 nm) was prepared by a solution cast method, based on the specific dispersion-agglomeration behavior of HPC/SiO2 nanohybrid aqueous suspensions. For the transparent suspension, with 10% of total weight of HPC and SiO2, when the weight composition of SiO2 is 0~30 wt %, free flow is maintained until the water evaporates and a high concentration is reached. Finally, a liquid crystal is formed, and the suspension becomes clouded. The transmittance of the film becomes 50~20% (400 nm). However, when the weight composition of SiO2 is 50~80 wt %, the transparent suspension gels, after a standing time which depends on concentration. A transparent hybrid film is formed with the state maintained. The transmittance of the film becomes 90%. It is thought this gelling happens due to the forming of hydrogen bonds between hydroxyl groups in HPC and the silanol groups on the SiO2 nanoparticle surface and that the SiO2 nanoparticles are dispersed in the network uniformly, leading to transparency.
  • 市川 涼児, 渡辺 大樹, 星 善造, 中野 英之
    2014 年 71 巻 10 号 p. 475-478
    発行日: 2014/10/25
    公開日: 2014/10/24
    ジャーナル フリー
    In order to create novel materials for use in rewritable displays, new hybrid films composed of poly(vinyl acetate) (PVAc) and quaternary salts have been investigated. It was found that hybrid films of PVAc-tetrabutylammonium tetrafluoroborate and PVAc-tetrabutylphosphonium tetrafluoroborate exhibited thermally reversible phase separation-dissolution behavior and the states at room temperature were controllable by thermal history. In addition, reversible display switching and fluorescence modulation were demonstrated by controlling the states of the films by thermal treatment.
  • 古賀 晴香, 新二日市 沙織, 中澤 浩二
    2014 年 71 巻 10 号 p. 479-481
    発行日: 2014/10/25
    公開日: 2014/10/24
    ジャーナル フリー
    As a new substratum for cell culture, we designed a tissue culture plate that was coated with a near-infrared (NIR)-responsive composite gel. The gel was composed of agarose and gold-nanorods modified with polyethylene glycol (PEG). The agarose gel itself was no responsive to NIR irradiation. In contrast, gold-containing gel heated up during NIR irradiation. The temperature rise led to an instantaneous and localized solation of the composite gel, and consequently, selective cell-adhesive regions were formed on the tissue culture plate. NIH-3T3 cells adhered only to the solated regions, forming a cell micropattern. This technique also allows for stepwise cell patterning of and/or complex cell patterns. Therefore, this is a promising platform for cell culture applications such as stepwise co-culture and the study of cell migration.
feedback
Top