Research Interests 【 display / non-display 】

Research Interests 【 display / non-display 】

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Graduating School 【 display / non-display 】

Graduating School 【 display / non-display 】

• 　

  -

  1985.03

  Iwate University   Faculty of Engineering   Other

Degree 【 display / non-display 】

Degree 【 display / non-display 】

• Yamagata University -  Doctor (Engineering)  1998.03

Campus Career 【 display / non-display 】

Campus Career 【 display / non-display 】

• 2020.04

  -

  Now

  IWATE University   Center for Hiraizumi Studies   [Concurrently]

• 2018.04

  -

  Now

  IWATE University   Center for Hiraizumi Studies   [Concurrently]

• 2016.04

  -

  Now

  IWATE University   Faculty of Science and Engineering   Department of Chemistry and Biological Science   Studies in Chemistry   Professor   [Duty]

• 2016.04

  -

  Now

  IWATE University   Abolition organization   Organization of Revitalization for Sanriku-region and regional development   Professor   [Concurrently]

• 2014.03

  -

  2019.03

  IWATE University   Graduate School of Engineering(Advanced Doctoral Programs)   Frontier Matter and Function Engineering   Professor   [Concurrently]

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Research Areas 【 display / non-display 】

Research Areas 【 display / non-display 】

• Nanotechnology/Materials / Organic functional materials

• Polymer chemistry

• Nanotechnology/Materials / Nano/micro-systems

• Nanotechnology/Materials / Analytical chemistry

• Adhesion

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Course Subject 【 display / non-display 】

Course Subject 【 display / non-display 】

• 2004

  Seminar in Chemical Engineering

• 2004

  Chemical Engineering Laboratory Ⅰ

• 2004

  Chemical Engineering Exercise Ⅰ

• 2004

  Information for Chemistry

• 2004

  Industrial Analytical Chemistry

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Research Career 【 display / non-display 】

Research Career 【 display / non-display 】

• Research and development of innovative manufacture using molecular adhesion technology

  Periods of research：

  2014.06

  -

  Now

  Keywords : JUNCTION ADHESION SIP

  Style of Research： Collaboration in Japan

  Research Program： Research for Technical Practical Use Promotion of Leading  

  Contents of Research Career

  ・In the wide fields of industries such as vehicles, airplanes, semiconductor electrical equipments, medical equipment etc., the development of novel composite materials are in great competition now. The adhesion technology of different materials is becoming increasingly important.
  ・IWATE University has developed the method named “molecule adhesion technology by triazine derivative" which has the advantages such as material, condition and environment independence. It can be proposed as a new manufacture technology to realize fewer components and processes integration.
  ・With the advancement and diffusing of this technology promoting, the development can be performed for creating plenty of new functional products. The East-Japan post-earthquake rehabilitation and the innovation of manufacture of Japan will be expected.

• Intercalation of Triazinethiol Molecules into Layered Double Hydroxide and Their Crosslinking Property for Halogenated Rubber Intercalation of Triazinethiol Molecules into Layered Double Hydroxide and Their Crosslinking Property for Halogenated Rubber Intercalation of Triazinethiol Molecules into Layered Double Hydroxide and Their Crosslinking Property for Halogenated Rubber

  Periods of research：

  1999.04

  -

  Now

  Keywords : Layered double hydroxide

  Research Program： (not selected)  

• DISSIMILAR METALS JUNCTION and ADHESION

  Periods of research：

  1994.04

  -

  Now

  Keywords : JUNCTION and ADHESION

  Style of Research： Collaboration in Japan

  Research Program： The Other Research Programs  

• Direct adhesion between Metal and Rubber

  Periods of research：

  1992.04

  -

  Now

  Keywords : metal,rubber,adhesion

  Style of Research： Individual

  Research Program： (not selected)  

• New triazine thiols compound synehesis

  Periods of research：

  1992.04

  -

  Now

  Keywords : triazine thiol

  Style of Research： Collaboration in Japan

  Research Program： (not selected)  

Published Papers 【 display / non-display 】

Published Papers 【 display / non-display 】

• Superhydrophobic and Conductive Cotton Fabric Composite with Excellent Corrosion Resistance for Wearable Electronics

  Zhixin Kang, Yeqing He, Jing Sang, Hidetoshi Hirahara, Dexin Chen

  Advanced Materials Interfaces   8 ( 17 ) 2100651   2021.08  [Refereed]

  Academic Journal  Multiple authorship

  Herein, a superhydrophobic and highly conductive cotton fabric (CF) composite with outstanding corrosion resistance for wearable textile electronics is developed. The fabrication process of the fabric composite involves spraying deposition and electrodeposition. Ag nanoparticles (AgNPs) are first synthesized on cotton fibers surface via two components spraying, forming cotton fibers core/AgNPs shell structure. The CF/ AgNPs composite is then covered with a layer of cerium myristate
  (CeM) by electrodeposition, which endows the composite with superhydrophobicity and outstanding corrosion resistance. The resistivity of CF/AgNPs/CeM composite could reach as low as 0.106 Ω mm. Moreover, the obtained CF/AgNPs/CeM composite exhibits excellent self-cleaning property and superhydrophobicity with a contact angle
  (CA) of 158.4°. Also, it maintains superhydrophobicity (CA > 150°) after 60 cm abrasion test or immersion in strong acidic/alkaline solution
  (pH = 1 or 13) for 24 h. In addition, the corrosion current density of conductive fabric composite (CFC) after electrodeposition decreases
  to 4.79% of the original value in simulated sweat corrosive media, suggesting a significant improvement of anti-corrosion. The developed superhydrophobic CFC with excellent corrosion resistance and self- cleaning performance has promising applications for wearable electronics in harsh conditions.

• A kinetic analysis of intercalation of organic sulfate anions into layered double hydroxide using quartz crystal microbalance with layered double hydroxide-immobilized electrode

  Sumio AISAWA, Jing SANG, Yuya NITANAI, Hidetoshi HIRAHARA, Eiichi NARITA

  Journal of the Ceramic Society of Japan ( THE CERAMIC SOCIETY OF JAPAN )  129 ( 7 ) 470 - 477   2021.07  [Refereed]

  Academic Journal  Multiple authorship

  To investigate a dynamic intercalation behavior of organic anions into layered double hydroxide (LDH) interlayer by ion-exchange, a quartz crystal microbalance (QCM) with the Mg-Al LDH thin film immobilized gold disc (LDH/QC) electrode has been used. A stable minute LDH film was prepared by using translucent aqueous sol of LDH containing OH- ions and magnesium acetate molecule in the interlayer and immobilized on the gold disc after pretreatment of the surface of the supporting silica electrode with hydrophobic agent. In the kinetic analysis, alkyl sulfates having n-alkyl chain (CnH2n+1, n = 5-12; abbreviated as CnS) were used as guest anions. As the results, the time-dependence on CnS intercalation by ion-exchange with guest OH- ions and magnesium acetate molecules was measured in the cases of CnS (n .GEQ. 7), and the data of C11S and C12S intercalation were successively analyzed using the rate equation based on the reversible pseud first-order reaction. Finally, the instrumental analyses of the LDH films before and after the intercalation of C12S revealed that the organic anions could be intercalated into the LDH interlayer of the LDH/QC electrode in each aqueous solutions.

  DOI

• Interfacial Molecular Motion and Chemical Characteristics of Polymer Jointed to Metal by Chemical Bonding

  Xueliang Deng, Jing Sang, Sumio Aisawa, Katsuhito Mori, Hidetoshi Hirahara

  Journal of the Japan Society of Colour Material   94 ( 6 ) 149 - 157   2021.06  [Refereed]

  International Conference Proceedings  Multiple authorship

  シリコンゴムと Al が接触方式による放熱材料の熱伝導性，接着剤による接合での熱伝導性，そして界面化学結合により創成したシリコンゴムとAl 複合体の化学接合方式による熱伝導特性への影響を評価することによって，ヒートシンクと放熱材料，および放熱材料と熱源の界面の接触熱抵抗の影響を解明している。シリコンゴムと Al 複合体の熱伝導特性におよぼすシリコンゴム架橋剤添加量とシリコンゴム厚さの影響について検討した。シリコンゴムと Al の接触方式による熱伝導性と接着剤による接合での熱伝導性，そして分子接合剤により界面化学結合させたシリコンゴムとAl複合体の化学接合方式によって熱伝導特性が異なることを解明し，化学結合を用いて接合したシリコンゴムとAl複合体放熱材料はシリコンゴムとヒートシンク (Al) 材料の接触熱抵抗の減少に有効であることを明らかにした。

• INTERCALATION BEHAVIOR OF VANILLIN AND RELATED COMPOUNDS INTO Mg-Al LAYERED DOUBLE HYDROXIDE BY CALCINATION-REHYDRATION REACTION IN AQUEOUS SOLUTIONS

  Sumio Aisawa, Jing Sang, Ayaka Masubuchi, Hidetoshi Hirahara, and Eiichi Narita

  Clay Science   24 ( 2-4 ) 47 - 54   2021.04  [Refereed]

  Academic Journal  Multiple authorship

  The intercalation behavior of vanillin (VL), one of the most famous flavoring components having aldehyde structure, and its related compounds, m-anise aldehyde (MA) and 2-methoxyphenol (MP), into Mg-Al layered double hydroxide (LDH) has been examined by the calcination-rehydration (reconstruction) method using LDH oxide precursor at 25.DEG.C for 24 h. The molar ratio of the organic guest in aqueous solution to Al3+ ion in LDH oxide was set at 1.00 in all the experiments. The solid product was found to incorporate the guest depend on its structure together with hydroxide ion and to show the restorable LDH structure. The amounts of the organic guest intercalated (the guest/Al molar ratio of the solid product) were as follows: VL (0.81)>MP (0.41)>MA (0.18), and the effect of each substituent group of the guests was also discussed. In the case of vanillin isomers, the intercalated amounts were differently in the order; VL (0.81)>ortho-vanillin (0.58)>iso-vanillin (0.35), whereas the intercalated amounts of anise isomers were, on the whole, lower than VL isomers as MA (0.18)>ortho-anise (0.034)>para-anise (0.012). The XRD patterns of the solid products showed that VL was intercalated as a monovalent anion to make bilayer and to keep horizontal orientation for the LDH basal layer, and the others were intercalated to keep parallel orientation in the interlayer. Moreover, the results of the guest deintercalation (release) experiments from the solid products by ion exchange with chloride or carbonate ion revealed that the easier intercalated guest, the more difficult released one from the solid products.

• Interfacial nanoconnections and enhanced mechanistic studies of metallic coatings for molecular gluing on polymer surfaces

  Dexin Chen, Zhixin Kang, Hidetoshi Hiraharac, Wei Liad

  Nanoscale Advances ( The Royal Society of Chemistry )  5 ( 2 ) 2106 - 2113   2020.02  [Refereed]

  Academic Journal  Multiple authorship

  Interfacial adhesion has been identified as being key for realizing flexible devices. Here, strong interfacial nanoconnections involving metallic patterns on polymer surfaces were fabricated via a molecular bonding approach, which includes UV-assisted grafting and molecular self-assembly. The interfacial characteristics of conductive patterns on liquid crystal polymer substrates were observed via transmission electron microscopy and atomic force microscopy infrared spectroscopy. The interfacial molecular layers have a thickness of 10 nm. Due to the successful molecular bonding modifications, interfacial adhesion has been sufficiently improved; in particular, the peel-related breakage sites will be located in the modified layers on the plastic surface beneath the interface after the metallic coatings are peeled off. Integrating X-ray photoelectron spectroscopy, infrared spectroscopy, and scanning electron microscopy results, the molecular bonding mechanism has been revealed: UV-assisted grafting and self-assembly result in the construction of interfacial molecular architectures, which provide nanosized connecting bridges between the metallic patterns and polymer surfaces. Such in-depth interfacial studies can offer insight into interfacial adhesion, which will impact on the development of metal/polymer composite systems and continue to push the improvement of flexible devices. Copyright 2020 Royal Society of Chemistry All rights reserved.

  DOI

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Review Papers 【 display / non-display 】

Review Papers 【 display / non-display 】

• Observation of Interface between Rubber and Galvanized Steel Bonded with Direct Curing Adhesion system after Aging under Elevated Temperature and High Humidity.

    ( 16 ) 8 - 14   2012.03

  In-House Magazine  

Presentations 【 display / non-display 】

Presentations 【 display / non-display 】

• Study of adhesion between thermoplastic resin and metal using injection molding

  Poster (General) 

  2022.09

  　

  　

  Joint Meeting of the Tohoku Area Chemistry Societies

• Study of adhesion between thermoplastic resin and metal using injection molding

  Poster (General) 

  2021.10

  　

  　

  Joint Meeting of the Tohoku Area Chemistry Societies

• Study on etchingless plating on glass substrate by chemical bonding

  Poster (General) 

  2021.10

  　

  　

  Joint Meeting of the Tohoku Area Chemistry Societies

• Synthesis of 1,3,5-triazine-based silane coupling agents containing diazirine- based photoreactive functional groups and their evaluation as molecular adhesive reagents

  Poster (General) 

  2021.10

  　

  　

  Joint Meeting of the Tohoku Area Chemistry Societies

• Synthesis and particle-size control of anti-cancer drug intercalated layered double hydroxide by coprecipitation method

  Poster (General) 

  2021.10

  　

  　

  Joint Meeting of the Tohoku Area Chemistry Societies

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Academic Awards Received 【 display / non-display 】

Academic Awards Received 【 display / non-display 】

• 2022.09.18

• 2022.09.17

• 2021.10.03

• 2021.09.17

• 2017.09.16

  All winners： Hidetoshi Hirahara, Keisuke Takahashi, Sumio Aisawa, and Sang Jing

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Industrial Property 【 display / non-display 】

Industrial Property 【 display / non-display 】

• Rubber-Metal adhesion Promoter, Rubber Composition, and Tire

  Patent

  Application number PCT/JP2015/075592　（国際出願日：2015/9/9）  Publication number WO2016/039375  Registration number 米国特許　10450439

  Application date： 2015.09.09

• Rubber-Metal adhesion Promoter, Rubber Composition, and Tire

  Patent

  Application number PCT/JP2015/075592　（国際出願日：2015/9/9）  Publication number WO2016/039375  Registration number 日本特許第6817812号

  Application date： 2015.09.09

  Publication date： 2016.03.01

• Rubber-Metal adhesion Promoter, Rubber Composition, and Tire

  Patent

  Application number 韓国出願10-2017-7006198 PCT/JP2015/075592  Publication number 2017-7006198  Registration number 韓国許特許第10-2273441号

  Application date： 2015.09.09

  Publication date： 2016.03.01

• Rubber-Metal adhesion Promoter, Rubber Composition, and Tire

  Patent

  Application number PCT/JP2015/075596　（国際出願日：2015/9/9）  Publication number WO2016/039376  Registration number ブラジル出願番号：　BR112017002573-6 号

  Application date： 2015.09.09

  Publication date： 2015.09.09

• Rubber-Metal adhesion Promoter, Rubber Composition, and Tire

  Patent

  Application number PCT/JP2015/075596　（国際出願日：2015/9/9）  Publication number WO2016/039376  Registration number 中国特許 201580048181.8

  Application date： 2015.09.09

  Publication date： 2016.03.01

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Association Memberships 【 display / non-display 】

Association Memberships 【 display / non-display 】

• 2020.05

  　

  　

   

  The Japan Institute of Electronics Packaging