2024/07/14 更新

写真a

ウメダ ノリタカ
梅田 礼敬
所属
附属機関・学校 高等学院
職名
教諭

経歴

  • 2024年04月
    -
    継続中

    早稲田大学高等学院   教諭

  • 2005年04月
    -
    2024年03月

    成蹊中学・高等学校   教諭

  • 2002年04月
    -
    2004年03月

    共立女子第二中学校高等学校   教諭

学歴

  • 2000年04月
    -
    2002年03月

    早稲田大学   大学院理工学研究科   応用化学専攻  

  • 1996年04月
    -
    2000年03月

    早稲田大学   理工学部   応用化学科  

 

論文

  • Sol-gel synthesis of a nanostructured hybrid material from an organosiloxane oligomer with a terminal phenyl group

    Atsushi Shimojima, Norimasa Atsumi, Noritaka Umeda, Yasuhiro Fujimoto, Kazuyuki Kuroda

    Journal of the Ceramic Society of Japan   114 ( 1334 ) 819 - 822  2006年

     概要を見る

    A novel ordered siloxane-organic hybrid material has been prepared by hydrolysis and polycondensation of a well-defined alkoxysilane precursor consisting of a tetrasiloxane unit and a 4-phenylbutyl group (1). Evaporation-induced self-assembly during hydrolysis and polycondensation of 1 led to the formation of a two-dimensional (2D) hexagonal mesostructure, which was revealed by X-ray diffraction (XRD) and transmission electron microscopy (TEM). Solid-state 13C CP/MAS NMR and 29Si MAS NMR confirmed that the product consisted of 4-phenylbutyl groups and siloxane networks, both of which are linked via Si-C bonds. These results will allow us to produce functional hybrid materials by chemical modification of phenyl groups, and also by incorporating other organic groups. Furthermore, calcination of this hybrid to remove organic groups led to the creation of an ordered microporous silica with the Brunauer-Emmett-Teller (BET) surface area of 570 m2 g-1 and the average pore diameter of 1.2 nm.

    DOI

    Scopus

    2
    被引用数
    (Scopus)
  • Synthesis of multilayered silica-based hybrid films from difunctional organosilanes by co-hydrolysis and polycondensation with tetraalkoxysilane

    Noritaka Umeda, Atsushi Shimojima, Kazuyuki Kuroda

    Journal of Organometallic Chemistry   686 ( 1-2 ) 223 - 227  2003年12月

     概要を見る

    Decylethyldimethoxysilane (C10EtDMS) and didecyldimethoxysilane (2C10DMS) were used to prepare thin films of silica-based hybrids by co-hydrolysis and polycondensation with tetramethoxysilane (TMOS) followed by spin-coating. The length of the second alkyl chains (Et or n -decyl) had large effects on the formation of ordered hybrid films. In the case of C10EtDMS, transparent films of well-ordered lamellar hybrids were formed with various TMOS/C10EtDMS ratios by controlling the degree of polycondensation in the precursor solutions. In contrast, no ordered hybrids were obtained in the case of 2C10DMS under the same conditions, due to the larger steric hindrance of the longer second alkyl chain in the co-condensation. Increases of both TMOS/2C10DMS and HCl/Si ratios in the starting solutions promoted polycondensation and lead to the formation of ordered hybrid films. © 2003 Elsevier B.V. All rights reserved.

    DOI

    Scopus

    8
    被引用数
    (Scopus)
  • Synthesis of layered inorganic-organic nanocomposite films from mono-, di-, and trimethoxy(alkyl)silane-tetramethoxysilane systems

    A. Shimojima, N. Umeda, K. Kuroda

    Chemistry of Materials   13 ( 10 ) 3610 - 3616  2001年

     概要を見る

    Transparent thin films of layered inorganic-organic nanocomposites were prepared by the sol-gel reactions of alkyldimethylmethoxysilane, alkylmethyldimethoxysilane, and alkyltrimethoxysilane in the presence of tetramethoxysilane followed by spin-coating. The macroscopic homogeneity and the nanostructural ordering of the films were strongly affected by the degree of polycondensation in the precursor solutions. The formation of siloxane networks containing organosiloxane units was confirmed by 29Si MAS NMR, suggesting that the structure of the inorganic-organic interface can be designed at a molecular level by the functionalities in the alkylmethoxysilanes used. On the other hand, the 29Si NMR spectra of the precursor solutions showed that the monomeric species almost disappeared and that co-condensed oligomers were formed at the initial stages of the reactions. In the cases of mono- and dimethoxysilanes, the ability to form ordered structures depends largely on the co-condensation with tetramethoxysilane in the precursor solutions.

    DOI

    Scopus

    105
    被引用数
    (Scopus)

講演・口頭発表等

  • アルキルモノ-,ジ-,トリ-メトキシシラン-テトラメトキシシラン系からの層状無機-有機名の複合体薄膜の合成

    梅田礼敬, 下嶋敦, 黒田一幸

    日本化学会第79春季年会  

    発表年月: 2001年03月

    開催年月:
    2001年03月
     
     
  • アルキルモノ-,ジ-,トリ-メトキシシランの自己組織化を利用した無機-有機ハイブリッド薄膜の合成

    梅田礼敬, 下嶋敦, 黒田一幸

    第39回セラミックス基礎科学討論会  

    発表年月: 2001年01月

    開催年月:
    2001年01月