Absorption of molecules into interstitial space of polymer crystals driven by entropic force

• Project/Area Number: 16K05521
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Biological physics/Chemical physics/Soft matter physics
• Research Institution: Keio University
• Principal Investigator: CHIBA Ayano 慶應義塾大学, 理工学部(矢上), 講師 (20424195)
• Research Collaborator: AKIYAMA Ryo
• Project Period (FY): 2016-04-01 – 2019-03-31
• Project Status: Completed (Fiscal Year 2018)
• Budget Amount: ¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000); Fiscal Year 2018: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000); Fiscal Year 2017: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000); Fiscal Year 2016: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
• Keywords: 高分子 / 液体 / 高圧力 / 溶融体 / 空隙 / 液体分離 / 多孔体 / 多孔性物質 / 共結晶 / 枯渇相互作用 / インターカレーション / 吸蔵 / 吸着 / 化学物理 / 高分子構造・物性 / 複合材料・物性 / ナノ材料 / Ｘ線回折

Outline of Final Research Achievements

Polymer P4MP1 [isotactic poly (4-methyl-1-pentene)] is a polymer which is used as for example food wrap in recent years, and is a polymer that a Japanese company occupies the share. We found that P4MP1 melt exhibits the characteristics as a porous liquid. The pores in the molten polymer shrink during pressurization, but recovers the pores with depressurization. This is a characteristic not found in existing "porous liquids".
We also found that P4MP1 film has the ability to separate alkanes, that is, different types of oils, and explained this phenomenon using Asakura-Oosawa theory.

Academic Significance and Societal Importance of the Research Achievements

近年、液体状態で多孔性を維持する物質をデザイン・合成することが世界的に行われている。本研究で我々は、溶融P4MP1が多孔性液体としての特徴を有することを見出した。この高分子溶融体において、嵩高い枝分かれ状の構造に起因した細孔は、減圧に伴い細孔サイズが回復する。これは、これまでの"多孔性液体"には見られない特性であり学術的に意義深く、応用にも役立つ可能性がある。
また、P4MP1固体フィルムが油同士の分離能を有する事を初めて見出し、この分子選択性に統計力学的立場から説明を行った。この知見は石油を始めとする液体分離分野に役立つだけでなく、分子認識に関するごく基礎的な知見としても学術的意義がある。

Research Products

• [Journal Article] Intensity distribution profile of double Bragg scattering in the small-angle region from highly oriented pyrolytic graphite (2018)
  • Author(s): Yoshinori Ohmasa, Ayano Chiba
  • Journal Title: Acta Crystallographica Section A Volume: 74 Issue: 6 Pages: 681-698
  • DOI: 10.1107/s2053273318012469
  • Peer Reviewed
• [Journal Article] Peculiar atomic dynamics in liquid GeTe with asymmetrical bonding: Observation by inelastic x-ray scattering (2018)
  • Author(s): M. Inui, A. Koura, Y. Kajihara, S. Hosokawa, A. Chiba, K. Kimura, F. Shimojo, S. Tsutsui, and A. Q. R. Baron
  • Journal Title: Physical Review B Volume: 97 Issue: 17 Pages: 174203-174203
  • DOI: 10.1103/physrevb.97.174203
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Isotactic poly(4-methyl-1-pentene) melt as a porous liquid: Reduction of compressibility due to penetration of pressure medium (2017)
  • Author(s): Chiba Ayano、Inui Masanori、Kajihara Yukio、Fuchizaki Kazuhiro、Akiyama Ryo
  • Journal Title: THE JOURNAL OF CHEMICAL PHYSICS Volume: 146 Issue: 19 Pages: 194503-194503
  • DOI: 10.1063/1.4983508
  • Peer Reviewed
• [Journal Article] Asymmetrical bonding in liquid Bi disentangled by inelastic X-ray scattering (2017)
  • Author(s): Inui Masanori、Kajihara Yukio、Munejiri Shuji、Hosokawa Shinya、Chiba Ayano、Ohara Koji、Tsutsui Satoshi、Baron Alfred Q. R.
  • Journal Title: EPJ Web of Conf. Volume: 151 Pages: 06001-06001
  • DOI: 10.1051/epjconf/201715106001
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Dispersion relations of the acoustic modes in divalent liquid metals (2017)
  • Author(s): Inui Masanori、Kajihara Yukio、Kimura Koji、Matsuda Kazuhiro、Miyatake Tetsu、Chiba Ayano、Hosokawa Shinya、Tsutsui Satoshi、Baron Alfred Q. R.
  • Journal Title: EPJ Web of Conf. Volume: 151 Pages: 06002-06002
  • DOI: 10.1051/epjconf/201715106002
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] X-ray Compton Scattering Study of Liquid Germanium and Tin (2017)
  • Author(s): Koji Kimura, Kazuhiro Matsuda, Takena Nagao, Toru Hagiya, Yukio Kajihara, Masanori Inui, Jumpei Nakamura, Ayano Chiba, Kouichi Hayashi, Masayoshi Itou, and Yoshiharu Sakurai
  • Journal Title: J. Phys. Soc. Jpn. Volume: 86 Issue: 12 Pages: 124703-124703
  • DOI: 10.7566/jpsj.86.124703
  • NAID: 210000134625
  • Peer Reviewed
• [Journal Article] The double Bragg scattering observed in the small angle X-ray scattering for Highly Oriented Pyrolytic Graphite (HOPG) (2016)
  • Author(s): Yoshinori Ohmasa, Susumu Shimomura, Ayano Chiba
  • Journal Title: Journal of Applied Crystallography Volume: 49 Issue: 3 Pages: 835-844
  • DOI: 10.1107/s1600576716004568
  • Peer Reviewed / Acknowledgement Compliant
• [Presentation] Molecular absorption in the porous polymer crystals of P4MP1 and sPS (2018)
  • Author(s): Ayano Chiba
  • Organizer: The 12th Mini-Symposium on Liquids
  • Int'l Joint Research
• [Presentation] 液体Sbの非弾性X線散乱測定 (2018)
  • Author(s): 乾雅祝, 梶原行夫, 中島陽一, 萩谷透, 松田和博, 細川伸也, 千葉文野, 内山裕士, 筒井智嗣
  • Organizer: 日本物理学会2018年秋季大会
• [Presentation] 空隙のある高分子結晶P4MP1およびsPSへの分子吸蔵 II (2017)
  • Author(s): 千葉文野, 折戸朗子, 秋山良
  • Organizer: 日本物理学会 第72回年次大会
  • Place of Presentation: 大阪大学 豊中キャンパス （大阪府・豊中市）
  • Year and Date: 2017-03-20
• [Presentation] アルカリ金属液体のX線コンプトン散乱測定 (2017)
  • Author(s): 林浩之, 萩谷透, 松田和博, 梶原行夫, 乾雅祝, 千葉文野, 伊藤真義, 櫻井吉晴
  • Organizer: 日本物理学会 第72回年次大会
  • Place of Presentation: 大阪大学 豊中キャンパス （大阪府・豊中市）
  • Year and Date: 2017-03-18
• [Presentation] 中性子回折によるSiO2ガラスの高温高圧下での相転移/緩和の検証 (2017)
  • Author(s): 服部高典, 佐野亜沙美, 稲村泰弘, ヤガファロフオスカー, 片山芳則, 千葉文野, 大友季哉
  • Organizer: 日本物理学会 第72回年次大会
  • Place of Presentation: 大阪大学 豊中キャンパス （大阪府・豊中市）
  • Year and Date: 2017-03-18
• [Presentation] Where Come from Dynamic Heterogeneity in Glass transition? : Similarity with Liquid-Liquid Transition (2017)
  • Author(s): Y. Kajihara, M. Inui, A. Chiba
  • Organizer: 8th International Discussion Meeting on Relaxations in Complex Systems (IDMRCS8)
  • Int'l Joint Research
• [Presentation] Selectivity of large hard sphere on a hard wall immersed in binary hard-sphere liquid (2017)
  • Author(s): Oshima A., Chiba A., Akiyama R.
  • Organizer: 10th Liquid Matter Conference (Liquids 2017)
  • Int'l Joint Research
• [Presentation] Transverse excitations in a van der Waals-like liquid Hg (2017)
  • Author(s): Hosokawa S., Inui M., Kajihara Y., Chiba A., Tsutsui S., Baron A. Q. R.
  • Organizer: 10th Liquid Matter Conference (Liquids 2017)
  • Int'l Joint Research
• [Presentation] Simple scenario for glass transition phenomena based on liquid-liquid transition framework (2017)
  • Author(s): Kajihara Y., Inui M., Chiba A.
  • Organizer: 10th Liquid Matter Conference (Liquids 2017)
  • Int'l Joint Research
• [Presentation] 構造不規則系の中距離秩序：空隙と圧力依存性（シンポジウム講演） (2017)
  • Author(s): 千葉 文野
  • Organizer: 日本物理学会 第73回年次大会（2018年）
  • Invited
• [Presentation] 一軸配向性多結晶試料からの二回Bragg散乱 (2017)
  • Author(s): 大政義典, 千葉文野
  • Organizer: 日本物理学会 第73回年次大会（2018年）
• [Presentation] ガラス転移の起源を液体 液体相転移に求める (2017)
  • Author(s): 梶原行夫, 乾雅祝, 千葉文野
  • Organizer: 日本物理学会 第73回年次大会（2018年）
• [Presentation] Double bragg scattering from highly oriented pyrolytic graphite in small-angle X-ray scattering region (2017)
  • Author(s): Yoshinori Ohmasa, Ayano Chiba
  • Organizer: 2nd International Conference on Applied Crystallography
  • Int'l Joint Research
• [Presentation] 空隙のある高分子結晶P4MP1およびsPSへの分子吸蔵 (2016)
  • Author(s): 千葉 文野, 秋山 良
  • Organizer: 日本物理学会 2016年秋季大会
  • Place of Presentation: 金沢大学 角間キャンパス （石川県・金沢市）
  • Year and Date: 2016-09-16
• [Presentation] 高配向性黒鉛結晶のX線小角散乱II (2016)
  • Author(s): 大政義典, 千葉 文野
  • Organizer: 日本物理学会 2016年秋季大会
  • Place of Presentation: 金沢大学 角間キャンパス （石川県・金沢市）
  • Year and Date: 2016-09-14
• [Presentation] Time concept of entropy: from “fast sound” to glass transition (2016)
  • Author(s): Y. Kajihara, M. Inui, A. Chiba
  • Organizer: The 16th International Conference on Liquid and Amorphous Metals (LAM-16)
  • Place of Presentation: Town Hall of Bonn, Bad Godesberg (Germany)
  • Year and Date: 2016-09-04
• [Presentation] The dispersion relation of the acoustic mode in liquid Ca and liquid Cd (2016)
  • Author(s): Masanori Inui, Yukio Kajihara, Koji Kimura, Kazuhiro Matsuda, Tetsu Miyatake, Ayano Chiba, Shinya Hosokawa, Satoshi Tsutsui, Alfred Q.R. Baron
  • Organizer: The 16th International Conference on Liquid and Amorphous Metals (LAM-16)
  • Place of Presentation: Town Hall of Bonn, Bad Godesberg (Germany)
  • Year and Date: 2016-09-03
• [Patent(Industrial Property Rights)] ポリオレフィン系重合体並びにそれを用いた有機化合物の吸着、吸蔵及び分離 (2019)
  • Inventor(s): 千葉 文野
  • Industrial Property Rights Holder: 学校法人慶應義塾
  • Industrial Property Rights Type: 特許
  • Industrial Property Number: 2019-067703
  • Filing Date: 2019