Asakura, Kouichi

写真a

Affiliation

Faculty of Science and Technology, Department of Applied Chemistry Department of Applied Chemistry, Faculty of Science and Technology, Keio University (Yagami)

Position

Professor

Related Websites

External Links

Profile Summary 【 Display / hide

  • '''''''Analyze, control and design non-equilibrium chemical system aiming at development of useful technology in organic chemical industry.'''''''

Career 【 Display / hide

  • 1990.04
    -
    1999.03

    慶應義塾大学(理工学部) ,助手

  • 1993.04
    -
    1995.03

    工学院大学 ,兼任講師

  • 1996.09
    -
    1997.08

    Wake Forest大学(米国), 訪問教員

  • 1999.04
    -
    2003.03

    慶應義塾大学(理工学部) ,専任講師

  • 2003.04
    -
    2007.03

    慶應義塾大学(理工学部) ,助教授

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Academic Background 【 Display / hide

  • 1985.03

    Keio University, Faculty of Science and Engineering, 応用化学科

    University, Graduated

  • 1987.03

    Keio University, Graduate School, Division of Science and Engineeri, 応用化学専攻

    Graduate School, Completed, Master's course

  • 1990.03

    Keio University, Graduate School, Division of Science and Engineeri, 応用化学専攻

    Graduate School, Completed, Doctoral course

Academic Degrees 【 Display / hide

  • 工学 , Keio University, 1990.03

Licenses and Qualifications 【 Display / hide

  • 危険物取扱者甲種, 2002.01

 

Research Areas 【 Display / hide

  • Organic chemistry (Industrial Organic Chemistry)

  • Basic chemistry (Industrial Physical Chemistry)

  • Thin film/Surface and interfacial physical properties (Surface Physics)

  • Functional solid state chemistry ("Function, Properties and Materials in Chemistry")

  • Basic chemistry (Physical Chemistry)

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Research Keywords 【 Display / hide

  • 化学反応系の制御と設計

  • 化粧品物理化学

  • 散逸構造

  • 自発的ホモキラリティーの発生

  • 非平衡系の自己組織化

Research Themes 【 Display / hide

  • Analyze, control and design non-equilibrium chemical system aiming at development of useful technology in organic chemical industry., 

     

     View Summary

    キラリティーを自発的に発現させる化学システム。
    周期的凹凸構造の自己組織化による超撥水及び光学特性に優れた表面の形成。
    自発的フロンタル重合とその光学材料作成への応用

Proposed Theme of Joint Research 【 Display / hide

  • 塗工・塗装技術、サンスクリーン剤のin vitro性能評価

 

Books 【 Display / hide

  • Synthetic Approaches to Control Self-propelled Motion of Micrometre-sized Oil Droplets in Aqueous Solution, Self-organized Motion: Physicochemical Design based on Nonlinear Dynamics Chap. 5

    Toyota T., Banno T., Asakura K., Royal Society of Chemistry, 2019.11,  Page: 116-138

  • 日焼け止め化粧料の塗布時に発生するヴィスコスフィンガリング現象がもたらす問題, 最新:化粧品開発のための美容理論 第20章

    朝倉 浩一, 技術教育出版, 2018.07,  Page: 198-208

  • Self-Propelled Motion of Micrometer-Sized Oil Droplets in Aqueous Solution of Surfactant, Properties and Uses of Microemulsions Chap.7

    T. Banno, T. Toyota, K. Asakura, IntechOpen, 2017.05,  Page: 139-154

  • 液膜塗工における表面状態制御, 薄膜塗布技術と乾燥トラブル対策 第10章

    ASAKURA KOUICHI, 技術情報協会, 2013.08,  Page: 652-657

  • 生体模倣技術としての散逸構造の形成, 生物模倣技術と新材料・新製品開発への応用 第8章 第3節

    ASAKURA KOUICHI, 技術情報協会, 2014.07,  Page: 583-590

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Papers 【 Display / hide

  • pH-Tolerant giant vesicles composed of cationic lipids with imine linkages and oleic acids

    Sawada D., Hirono A., Asakura K., Banno T.

    RSC Advances (RSC Advances)  10 ( 56 ) 34247 - 34253 2020.09

     View Summary

    Giant vesicles (GVs) have attracted attention as functional materials because they can encapsulate both hydrophilic and hydrophobic compounds. For next generation functional GVs, both tolerance and stimuli-sensitivity are needed. So far, vesicles tolerant to acidic or basic conditions were generated using a mixture of cationic lipids and fatty acids. Here, to create functional GVs that are tolerant to a wide pH range but sensitively respond at below a specific pH, the behaviour of GVs composed of a cationic lipid with an imine bond and oleic acid was investigated. Even though the GVs prepared by the film swelling method were tolerant to strongly acidic conditions, GVs without oleic acid gradually shrank, accompanied by the generation of oil droplets at the same pH. 1H NMR analysis revealed that during hydration of the film, the imine bond hydrolysed to provide a cationic surfactant and an oil component in the presence of oleic acid due to its own Lewis basicity, suggesting the dissociation of oleic acid. The results of fluorescence spectroscopy using an environment-responsive probe and IR spectroscopy indicated that the GV tolerance originated from the intermolecular interactions of cationic lipids and anionic oleate. This journal is

  • Temperature-Dependent Dynamics of Giant Vesicles Composed of Hydrolysable Lipids Having an Amide Linkage

    Tameyuki M., Hiranaka H., Toyota T., Asakura K., Banno T.

    Langmuir (Langmuir)  35 ( 52 ) 17075 - 17081 2019.12

    ISSN  07437463

     View Summary

    Various amphiphiles including surfactants and lipids have been designed and synthesized to improve and create new functionalities. In particular, the emergence of cell-like behaviors of giant vesicles (GVs) composed of synthetic lipids has drawn much attention in the development of chemical models for cells. The aim of this study was to measure temperature-dependent morphological changes of GVs induced by fragmentation and subsequent growth using hydrolysable cationic lipids having an amide linkage. Results from differential scanning calorimetry, fluorescence spectroscopy using an environment-responsive probe, and confocal Raman microscopy showed that the dynamics observed were due to changes in the vesicle membrane, including variation in the lipid composition, induced by thermal stimulation.

  • Start of Micrometer-Sized Oil Droplet Motion through Generation of Surfactants

    Kasuo Y., Kitahata H., Koyano Y., Takinoue M., Asakura K., Banno T.

    Langmuir (Langmuir)  35 ( 41 ) 13351 - 13355 2019.10

    ISSN  07437463

     View Summary

    Self-propelled motion of micrometer-sized oil droplets in surfactant solution has drawn much attention as an example of nonlinear life-like dynamics under far-from-equilibrium conditions. The driving force of this motion is thought to be induced by Marangoni convection based on heterogeneity in the interfacial tension at the droplet surface. Here, to clarify the required conditions for the self-propelled motion of oil droplets, we have constructed a chemical system, where oil droplet motion is induced by the production of 1,2,3-triazole-containing surfactants through the Cu-catalyzed azide-alkyne cycloaddition reaction. From the results of the visualization and analysis of flow fields around the droplet, the motion of the droplets could be attributed to the formation of flow fields, which achieved sufficient strength caused by the in situ production of surfactants at the droplet surface.

  • Surface structures of cosmetic standard poly methyl methacrylate UV evaluation plates and their influence on the in vitro evaluation of UV protection abilities of cosmetic sunscreens

    Kuroda A., Sakai K., Yahagi S., Mukawa T., Sato N., Nakamura N., Maezawa D., Masaki H., Banno T., Asakura K.

    Journal of Oleo Science (Journal of Oleo Science)  68 ( 2 ) 175 - 182 2019

    Research paper (scientific journal), Joint Work, Accepted,  ISSN  13458957

     View Summary

    © 2019 by Japan Oil Chemists’ Society. Cosmetic standard poly methyl methacrylate (PMMA) UV evaluation plates, i.e., roughened PMMA plates, are used in the EU and the US for the in vitro evaluation of UV protection abilities of sunscreen, such as in vitro UVA-PF and critical wavelength for the Broad-spectrum approval. In our previous studies, inhomogeneity in the thickness of a pseudo-sunscreen layer applied on a flat quartz plate was observed to alter UV transmission. Thus, the surface roughness of the standard plates should have a significant influence on the in vitro evaluation. In the present study, we have analyzed the surface structures of three cosmetic standard PMMA UV evaluation plates: Helioplates HD6 (Sa = 6 µm) and ISO plates (Ra = 2 and 5 µm). A decamethylcyclopentasiloxane and 2-propanol-mixed solvent solution of acrylsilicone resin was prepared, and the solution was added dropwise onto the plates. After the evaporation of the solvents, the plates were cut and the cross section was analyzed using SEM-EDS. The distribution of silicon atoms at the cross-section suggested that the maximum depth of penetrating of acrylsilicone resin was larger than Ra for all the standard plates, and the surface structure was significantly different for each standard plate. In addition, cracks into which the acrylsilicone resin deeply penetrated were observed on the surface of some plates. Clear-solution-type pseudo-sunscreen samples in which UV absorbers and acrylsilicone resin were dissolved were deposited on the standard roughened PMMA plates. It was observed that the addition of acrylsilicone resin drastically changed the net UV transmission. The degree to which the hollows of the roughened surface were filled with the pseudo-sunscreen samples determined the variation of UV transmittance.

  • Hydrophilicity of the substrate surface under the applied sunscreen layer changes in vitro UV protection efficacies

    Kouichi Asakura, Akihiro Kuroda

    IFSCC Magazine (IFSCC)  21   53 - 57 2018.08

    Research paper (scientific journal), Joint Work, Accepted

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Papers, etc., Registered in KOARA 【 Display / hide

Reviews, Commentaries, etc. 【 Display / hide

  • 塗工過程における自発的な空間周期構造の発生とその制御による表面の機能化

    ASAKURA KOUICHI

    塗装工学 48 ( 5 ) 190 - 197 2013

    Introduction and explanation (scientific journal), Single Work

  • 表面形成における非平衡系の自己組織化の制御

    ASAKURA KOUICHI

    オレオサイエンス 13 ( 4 ) 171 - 177 2013

    Introduction and explanation (scientific journal), Single Work

Presentations 【 Display / hide

  • Far-from-equilibrium dynamic interface spontaneously generated in drying and mixing processes of two miscible solvents

    Kouichi Asakura, Haruka Watanabe, Taisuke Banno, Shoji Takekawa

    2018 AOCS Annual Meeting & Expo (Minneapolis, (USA)) , 2018.05, Oral Presentation(general), AOCS

  • Surface coating technology developed in far-from-equilibrium systems

    Asakura, K.

    Gordon Research Conference “Oscillations & Dynamic Instabilities in Chemical Systems” (Lucca, Italy) , 2010.07, Oral Presentation(general)

  • Preparation of Photonics Polymers by Spontaneous Frontal Polymerization

    K. Asakura, A. Takata, J. Omoto, E. Nihei

    American Chemical Society National Meeting, Symposium on Nonlinear Dynamics in Polymeric Systems, 2008.04, Oral Presentation(guest/special)

  • Emergence of Homochirality in Chemical Systems

    K. Asakura

    NORTIDA Program "Origins of Homochirality", 2008.02, Oral Presentation(guest/special)

  • Spontaneous Generation of Hot and Reacted Region to Form Propagating Front in a Reaction System of Free-radical Polymerization of Methyl Methacrylate

    朝倉 浩一,井雲昭仁,原澤宏和,小山内州一,二瓶栄輔

    American Chemical Society National Meeting, Symposium on Nonlinear Dynamics in Polymeric Systems (Boston, U.S.A.) , 2002.08, Oral Presentation(guest/special)

     View Summary

    リーラジカル重合の自己促進は反応器のサイズの影響を受け、適切なサイズとすると、フロンタル重合が中心部から周囲へと進行していく形で反応が完了することを報告した。

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Research Projects of Competitive Funds, etc. 【 Display / hide

  • 共同研究「鋼板の接着接合における鋼板と接着剤との界面接着メカニズム解明に関する研究」

    2021.04
    -
    Present

  • 共同研究「角膜の生体力学的条件下での形状とその変形の解析」

    2019.04
    -
    Present

  • 共同研究「Optical properties evaluation by controlling coating film formation of surface treated powder」

    2017.08
    -
    Present

    Joint research

  • 共同研究「サンスクリーン剤のin vitro性能評価における国際標準化法の確立を目指す産学連携研究」

    2017.04
    -
    Present

    Joint research

  • サンスクリーン剤の紫外線防御機能を普く正確にin vitro評価する測定方法の確立

    2016.12
    -
    2018.11

    公益財団法人 コスメトロジー研究振興財団, 2016年度 「コスメトロジー研究」研究助成, 朝倉 浩一

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Works 【 Display / hide

  • 第6回宇宙環境利用に関する地上研究

    朝倉 浩一

    2002
    -
    2004

    Other, Single

     View Details

    「結晶成長フロントにおけるキラル対称性の破れをもたらすキラル自触媒過程の非線形動力学解析」という研究テーマで、(財)日本宇宙フォーラムより慶應義塾大学理工学部への委託研究という形をとるプロジェクトである。朝倉はこれまでの共同研究者らと連絡は取り合いながらも、基本的には単独でこのプロジェクトに取り組み、将来に宇宙ステーション軌道上実験を行なうための、準備研究を行なう。

Intellectual Property Rights, etc. 【 Display / hide

  • 紫外線吸収剤又は赤外線遮断剤含有水性組成物の紫外線防御効果又は赤外線防御効果の測定方法及び測定装置

    Application No.: PCT/JP2017/031362  2017.08 

    Announcement No.: WO2018/047707  2018.03 

    Registration No.: 6842778  2021.03

    Patent, Joint, PCT international application

  • 回転霧化式静電塗装装置のベルカップ

    Application No.: PCT/JP2013/075465  2013.09 

    Announcement No.: WO2014/054438  2014.04 

    Registration No.: 5830612  2015.10

    Patent, Joint, PCT international application

  • 化粧料の紫外線防御効果の測定方法、測定装置、及び測定値の表示方法

    Application No.: 特願2010-206174  2010.09 

    Announcement No.: 特許公開2012-063180  2012.03 

    Registration No.: 5825654  2015.10

    Patent, Joint, National application

  • 紫外線吸収剤又は赤外線遮断剤含有水性組成物の紫外線防御効果又は赤外線防御効果の測定方法及び測定装置

    Application No.: 特許出願2016-174084  2016 

    Patent, Joint, National application

  • 高撥水性組成物

    Application No.: 特許出願2007-227523  2006.09 

    Announcement No.: 特許公開2008-101197  2008.05 

    Registration No.: 特許第5466356号 

    Patent, Joint, National application

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Awards 【 Display / hide

  • (社)日本油化学会進歩賞

    Kouichi Asakura, 2002.03, (社)日本油化学会, 有機基質の劣化防止に対する新規物質及び新規技術の開発に関する研究

    Type of Award: Awards of Publisher, Newspaper Company and Foundation

 

Courses Taught 【 Display / hide

  • SEMINAR IN APPLIED CHEMISTRY

    2021

  • NON-LINEAR DYNAMICS IN CHEMICAL SYSTEM

    2021

  • LABORATORIES IN APPLIED CHEMISTRY D

    2021

  • INDEPENDENT STUDY ON SCIENCE FOR OPEN AND ENVIRONMENTAL SYSTEMS

    2021

  • GRADUATE RESEARCH ON SCIENCE FOR OPEN AND ENVIRONMENTAL SYSTEMS 2

    2021

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Educational Activities and Special Notes 【 Display / hide

  • 大学院科目「Non-linear Dynamics in Chemical Systems」

    2004.04
    -
    Present

    , Device of Educational Contents

     View Details

    国際特別コース用の科目として英語で開講

 

Social Activities 【 Display / hide

  • 慶應義塾大学理工学部同窓会副会長

    2019.04
    -
    Present
  • 慶應義塾普通部 目路はるか教室

    慶應義塾普通部

    2020.11

Memberships in Academic Societies 【 Display / hide

  • 日本油化学会, 

    1985.09
    -
    Present
  • 日本塗装技術協会, 

    2011.01
    -
    Present
  • 日本化学会, 

    1987.01
    -
    Present

Committee Experiences 【 Display / hide

  • 2019.04
    -
    2021.03

    会長, 日本油化学会

  • 2021.04
    -
    Present

    副会長 代表理事 運営委員会委員長 , 日本油化学会

  • 2021.04
    -
    Present

    創立70周年記念事業実行委員会 委員長 , 日本油化学会

  • 2019.04
    -
    2021.03

    創立70周年記念事業準備委員会 委員長, 日本油化学会

  • 2019.09
    -
    Present

    学術専門委員会 委員長, 日本油化学会

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