[579● ]aP]aMPMe[ru力ss圧erP超臨界流体22.1 0.1(常圧)Ambient condition0100374温度 [ºC]Temperature [ºC]SCW超臨界水液体LiquidCritical 臨界点Point固体Solid気体Gas1125200400600and Supercritical water （SCW)超臨界水とは27Outlook for researchLiving organismsleverage their acquiredknowledge to create exceptional fibers in thewater. There is a great deal that researcherscan learn from fiber materials created by livingorganisms. This knowledge willlead to thefiber material engineering of the future.Outlook for students after graduationGraduates are employed as R&D engineers bymanufacturesfollowingbusinesses: spinning;fiber production non-woven material production; food ingredientproduction; sports product production; plasticprocessing; processing, manufacture, and saleof natural polysaccharides; and chemicalproduct manufacturing.involvedOutlook for researchOutlook for students after graduationDepartment ofChemistry and MaterialsDepartment ofChemistry and MaterialsProfessorOHKAWA KousakuAfter graduating from the FunctionalPolymer Science Course at the Faculty ofTextile Science and Technology (FTST)and completing the first semester of adoctoral program at the Graduate SchoolofOhkawaparticipated in a graduate course offeredby the University of Tokyo’s GraduateSchoolHesubsequently returned to the Institute ofHigh Polymer Research (IHPR) run by theFTST at Shinshu University in 1996 as anassistant professor and later submittedhis doctoral thesis to the University ofTokyo (Doctorate of Science, 1998). Hewas promoted to associate professor atthe IHPR in 2003. His has served as aprofessor in the Division of Biological andMedical Fibers at the Institute for FiberEngineering (IFES) at Shinshu Universitysince 2014.ProfessorOSADA MitsumasaPh. D. Tohoku Univ. Japan. 2005.Ichinoseki NationalAssoc. Prof.Coll. of Tech. 2006-2014. VisitingScholar, the University of Michigan,USA. 2007-2008. Assoc. Prof.Shinshu Univ. 2014-2023. Prof.Shinshu Univ. 2024-.The Asian green mussel creates this strange byssus fiber underwater.Byssus fibers are generated by the adhesive disk at the end (left: the stickypart), the distal section (center: a hard, strong fiber), and the proximalsection (right: a tough, strong fiber).Investigation of HTW and SCW as new chemical reaction fieldProfessorEngineering,BiologicalScience.An advantage of biomass conversion in HTW andSCW is that hot water can serve as a solvent, areactant, and a catalyst. While many biomass (e.g.,protein and chitin) are not water-soluble at ambientconditions, most are readily solubilized in HTW orSCW. In addition, H+ and OH- concentrations of HTWare higher than those of ambient water and the acidor base catalyzed reactions proceed without addingcatalysts.Students would work at chemical,food, andpharmaceutical companies as an engineer and aresearcher. I hope that the students will make thebiggest impact in the field of new environmentalbenign chemical engineering.Nanofiber production from unusedagricultural resourcesFunctional Materialsbiomassfrom wasteI am carrying out bioscience and biochemical researchinto fibers made by organisms that live in water. Mythe phyla Mollusca andresearch primarily coversArthropoda. Bivalve clams that live in the ocean create atype of fiber called byssus.Biomass conversion in high-temperature water (HTW) andsupercritical water (SCW) has been studied. HTW refers towater in its liquid state below its critical temperature andpressure (374ºC, 22.1 MPa), whereas it becomes a highlycompressible fluid called SCW above this point. We are alsousing a water jet machine for wet pulverize treatment ofbiomass. Water is the most environmentally benign solvent.The target biomass are wood (lignin), fish scale (protein),squid pen (chitin). For example, we are trying to producechitin nanofiber from squid pen by a water jet machine.in thepHpOHPressure24MPaTemperature [oC]The neutral pH of water is controlled by temperature and pressure.High-temperature waterWaste BiomassFunctionalMaterialsLignin(Wood）PhenoliccompoundsProtein（Fish scale）CollagenPeptideβ-Glucan（Mushroom）Oligo-saccharideChitin（Crab）Production of Functional Materials from Biomass byUsing Only WaterExploring the future of biochemical research
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