Original papers



  1. B. Lu, K. Takahashi, J. Zhou, S. Nakagawa, Y. Yamamoto, T. Katashima, N. Yoshie, K. Nozaki, “Mild Catalytic Degradation of Crystalline Polyethylene Units in Solid State Assisted by Carboxylic Acid Groups” Journal of the American Chemical Society, in press. (Highlighted in Press Release)
  2. R. Cho, H. Kamata, Y. Tsuji, A. Fujisawa, Y. Miura, S. Ishikawa, R. Sato, T. Katashima, T. Sakai, M. Fujishiro, “Optimizing self-solidifying hydrogels as an endoscopically deliverable hydrogel coating system: A proof-of-concept study in porcine endoscopic submucosal dissection-induced ulcers” Polymer Journal, in press.
  3. R. Kobayashi, M. Naito, K. Miyata, T. Sakai, U. Chung, T. Katashima*, “Prediction of degradation effects on viscoelastic relaxation time using model transient networks” Polymer Journal, 56, 685-691 (2024). (Highlighted in Coverart)
  4. Tsuchiya, K. Terada, Y. Tsuji, S. Law, H. Masunaga, T. Katashima, T. Sakai, K. Numata, “Cross-linking polybutadiene rubber via a thiol-ene reaction with polycysteine as a degradable cross-linker” Polymer Journal, 56, 391-400 (2024)

  5. S. Ishikawa, Y. Iwanaga, T. Uneyama, X. Li, H. Hojo, I. Fujinaga, T. Katashima, T. Saito, Y. Okada, U. Chung, N. Sakumichi and T. Sakai, “Percolation-induced gel–gel phase separation in a dilute polymer network” Nature Materials, 22, 1564-1570 (2023)
  6. M. Kato, S. Ishikawa, Q. Shen, Z. Du, T. Katashima, M., T. Numahata, M. Okazaki, T. Sakai, M. Kurita, “In situ-formable, dynamic crosslinked poly(ethylene glycol) carrier for localized adeno-associated virus infection and reduced off-target effects” Communication Biology, 6: 508 (2023)
  7. S. Ishikawa, M. Kato, J. Si, L. Chenyu, K. Kimura, T. Katashima, M. Naito, M. Kurita, T. Sakai, “Molecular Weight-Dependent Diffusion, Biodistribution, and Clearance Behavior of Tetra-Armed Poly(ethylene glycol) Subcutaneously Injected into the Back of Mice” ACS Macro Letters, 12(4) 510-517 (2023)

  8. T. Katashima*, R. Kobayashi, S. Ishikawa, M. Naito, K. Miyata, U. Chung, T. Sakai, “Decoupling between Translational Diffusion and Viscoelasticity in Transient Networks with controlled network connectivity” Gels, 8 (12), 830 (2022)
  9. T. Katashima*, R. Kudo, R. Onishi, M. Naito, S. Nagatoishi, K. Miyata, K. Tsumoto, U. Chung, T. Sakai, “Effects of Network Connectivity on Viscoelastic Relaxation in Transient Networks using Experimental Approach” Frontiers in Soft Matter, 2:1059156(2022)
  10. T. Murakami, S. Hoshi, F. Okamoto, T. Sakai, T. Katashima, M. Naito, T. Oshika, “Analysis of the sustained release ability of bevacizumab-loaded tetra-PEG gel” Experimental Eye Research, 223 109206 (2022)
  11. T. Katashima*, R. Kudo, M. Naito, S. Nagatoishi, K. Miyata, U. Chung, K. Tsumoto, T. Sakai, ” Experimental Comparison of Bond Lifetime and Viscoelastic Relaxation in Transient Networks with Well-Controlled Structures” ACS Macro Letters, 11 753-759 (2022)
  12. J. Tang, T. Katashima*, C.I. Gupit, X. Li, Y. Mitsukami, Y. Yokoyama, N. Sakumichi, U. Chung, T. Sakai, “Non-swellability of polyelectrolyte gel in divalent salt solution due to aggregation formation” Polymer, 124894 (2022)
  13. T. Fujiyabu, N. Sakumichi, T. Katashima, C. Liu, K. Mayumi, U. Chung, T. Sakai, “Tri-branched gels: Low branching factors make rubbery materials ultra-elastic” Science Advances, 8(14) (2022)
  14. M. Ohira, T. Katashima, M. Naito, D. Aoki, Y. Yoshikawa, H. Iwase, S. Takata, K. Miyata, U. Chung, T. Sakai, M. Shibayama, X. Li, “Star-Polymer-DNA Gels Showing Highly Predictable and Tunable Mechanical Responses” Advanced Materials, e2108818 (2022)

  15. T. Fujiyabu, T. Sakai, R. Kudo, Y. Yoshikawa, T. Katashima, U. Chung, N. Sakumichi, “Temperature Dependence of Polymer Network Diffusion” PHYSICAL REVIEW LETTERS 127, 23 (2021)
  16. J. Tang, T. Katashima*, X. Li, Y. Mitsukami, Y. Yokoyama, U. Chung, M. Shibayama, T. Sakai “Effect of Nonlinear Elasticity on the Swelling Behaviors of Highly Swollen Polyelectrolyte Gels” Gels, 7 (1), 25 (2021)

  17. S. Konishi, Y. Kashiwagi, G. Watanabe, M. Osaki, T. Katashima, O. Urakawa, T. Inoue, H. Yamaguchi, A. Harada, Y. Takashima “Design and mechanical properties of supramolecular polymeric materials based on host-guest interactions: the relation between relaxation time and fracture energy” Polymer Chemistry, 11 (42) 6811-6820 (2020)
  18. J. Tang, T. Katashima*, X. Li, Y. Mitsukami, Y. Yokoyama, N. Sakumichi, U. Chung, M. Shibayama, T. Sakai “Swelling Behaviors of Hydrogels with Alternating Neutral/Highly Charged Sequences” Macromolecules 53, 19 (2020)
  19. A. D. Malay, T. Suzuki, T. Katashima, N. Kono, K. Arakawa, K. Numata “Spider silk self-assembly via modular liquid-liquid phase separation and nanofibrillation” Science Advances, 6 (45) (2020)
  20. T. Katashima, R. Kagami, U. Chung, T. Sakai “Similarity in linear viscoelastic behaviors of network formation and degradation processes” Nihon Reoroji Gakkaishi 48 (4) (2020)
  21. J. Kim, T. Fujiyabu, N. Sakumichi, T. Katashima, Y. Yoshikawa, U. Chung, T. Sakai “Mixing and Elastic Contributions to the Diffusion Coefficient of Polymer Networks” Macromolecules 53, 18, 7717-7725 (2020)
  22. I. Fujinaga, T. Yasuda, M. Asai, U. Chung, T. Katashima, T. Sakai “Cluster growth in percolation process from diluted system” Polymer Journal 52 (3) 289-297 (2020)
  23. H. Sogawa, T. Katashima, K. Numata “A covalently crosslinked silk fibroin hydrogel using enzymatic oxidation and chemoenzymatically synthesized copolypeptide crosslinkers consisting of a GPG tripeptide motif and tyrosine: control of gelation and resilience” Polymer Chemistry 11 (18), 3152-3161 (2020)
  24. T. Chiba, T. Katashima, O. Urakawa, T. Inoue “Rheological Test for the Homogeneity of Aqueous Blends of Associative Polymer Network and Entangled Linear Polymer” Nihon Reoroji Gakkaishi, 48(1) 49-54 (2020)

  25. C. J. Love, B. A. Serban, T. Katashima, K. Numata, M. A. Serban “Mechanistic insights into silk fibroin’s adhesive properties via chemical functionalization of serine side chains” ACS Biomaterials Science & Engineering, 5, 11, 5960-5967 (2019)
  26. M. Ohnishi, T. Katashima*, M. Nakahata, O. Urakawa “Relationships between Diffusion and Viscoelasticity of Associative Polymer Networks” Nihon Reoroji Gakkaishi, 47 (4) 133-142 (2019)
  27. Y. Kashiwagi, T. Katashima, Y. Takashima, A. Harada, T. Inoue “Effect of Host-Guest Interaction on Swelling Behavior and Equilibrium Swollen State of Host-Guest Gel” Nihon Reoroji Gakkaishi, 47 (3), 99-104 (2019)
  28. T. Katashima*, U. Chung, and T. Sakai “Mechanical Properties of Doubly Crosslinked Gels” Polymer Journal, 3, 1-9 (2019)
  29. T. Katashima*, H. Sakurai, U. Chung, and T. Sakai “Dilution effect on the cluster growth near the gelation threshold” Nihon Reoroji Gakkaishi, 47, (2), 61-66 (2019)

  30. Y. Okada, Y. Goto, R. Tanaka, T. Katashima, X. Jiang, K. Terao, T. Sato, and T. Inoue “Viscoelastic Properties of Tightly Entangled Semiflexible Polymer Solutions” Macromolecules, 51 (23), pp 9626–9634 (2018)
  31. Y. Kashiwagi, T. Katashima, M. Nakahata, Y. Takashima, A. Harada, and T. Inoue “Linear Viscoelastic Studies on a Transient Network Formed by Host-Guest Interaction.” Journal of Polymer Science Part B: Polymer Physics, 56, 1109-1117 (2018)

  32. T. Inoue, Y. Narihisa, T. Katashima, S. Kawasaki, and T. Tada “A Rheo-Optical Study on Reinforcement Effect of Silica Particle Filled Rubber” Macromolecules, 50, 20, 8072-8082, (2017)
  33. K. Hayashi, F. Okamoto, S. Hoshi, T. Katashima, D. Zujur, X. Li, M. Shibayama, E. P. Gilbert, U. Chung, S. Ohba, T. Oshika, and T. Sakai “Fast-forming hydrogel with ultralow polymeric content as an artificial vitreous body” Nature Biomedical Engineering, 1, 0044 (2017)

  34. 山﨑香奈,片島拓弥*,井上正志,中村綾野,那須昭夫 「マイクロゲル・高分子混合系のレオロジー」 高分子論文集,73, 6, 532-538 (2016)
  35. T. Sakai, T. Katashima, T. Matsushita, and U. Chung “Sol-gel transition behavior near critical concentration and connectivity” Polymer Journal, 48, 629-634 (2016)

  36. T. Katashima, U. Chung, and T. Sakai, “Effect of swelling and deswelling on mechanical properties of polymer gels” Macromolecular Symposia, 358, 128-139 (2015)
  37. M. Asai, T. Katashima, T. Sakai, and M. Shibayama “Supercoiling Transformation of Chemical Gels” Soft Matter, 11, 7101-7108 (2015)
  38. T. Katashima, K. Urayama, U. Chung, and T. Sakai, “Probing the cross-effect of strains in non-linear elasticity of nearly regular polymer networks by pure shear deformation” Journal of Chemical Physics, 142, 174908, (2015)

  39. T. Katashima, M. Asai, K. Urayama, U. Chung, and T. Sakai, “Mechanical properties of tetra-PEG gels with supercoiled network structure” Journal of Chemical Physics, (140), 074902, (2014)
  40. K. Numata, S. Yamazaki, T. Katashima, J. Chuah, N. Naga, and T. Sakai, “Silk-Pectin Hydrogel with Superior Mechanical Properties, Biodegradability, and Biocompatibility” Macromolecular Bioscience, (14), 6, 799-806 (2014)

  41. M. Asai, T. Katashima, T. Sakai, U. Chung, and M. Shibayama “Correlation between local and global inhomogeneities of chemical gels” Macromolecules, (46), 24, 9772-9781 (2013)
  42. Y. Akagi, T. Katashima, H. Sakurai, U. Chung, and T. Sakai “Ultimate elongation of polymer gels with controlled network structure” RSC Advances, 3, (32), 13251-13258. (2013)2012
  43. T. Katashima, K. Urayama, U. Chung, and T. Sakai “Strain energy density function of near-ideal polymer network estimated by biaxial deformation of Tetra-PEG gel” Soft Matter, 8, 8217-8222 (2012)

  44. Y. Akagi, T. Katashima (Co-first), Y. Katsumoto, K. Fujii, T. Matsunaga, U. Chung M. Shibayama, and T. Sakai, “Examination of the theories of rubber elasticity using an ideal polymer network” Macromolecules, 44, 5817-5821 (2011)
  45. K. Numata, T. Katashima, and T. Sakai, “State of Water, Molecular Structure, and Cytotoxicity of Silk Hydrogels” Biomacromolecules, 12, 2137-2144 (2011)

  46. M. Kurakazu, T. Katashima (Co-first), M. Chijiishi, K. Nishi, Y. Akagi, T. Matsunaga, M. Shibayama, U. Chung, and T. Sakai, “Evaluation of gelation kinetics of Tetra-PEG gel” Macromolecules, 43, 3935-3940 (2010)

Review papers

  1. S.Michida, U. Chung, T. Katashima*, “Probing the Molecular Mechanism of Viscoelastic Relaxation in Transient Networks”
    Gels, 9(12), 945 (2023)
  2. T. Katashima*, “Precise rheological analysis of permanently and transiently crosslinked polymer networks with well-controlled structures”
    Nihon Reoroji Gakkaishi, accepted (Award Lecture Article)
  3. T. Katashima*, “Molecular Understanding of Viscoelasticity in Transient Polymer Networks Based on Multiple Methods”
    Nihon Reoroji Gakkaishi, 50, 51-56 (2022) (Invited Review)
  4. T. Katashima*, “Rheological studies on polymer networks with static and dynamic crosslinks”
    Polymer Journal, 53, 1073–1082 (2021) (Invited Review)
  5. T. Katashima, A. Malay (co-first), and K. Numata, “Chemical modification and biosynthesis of silk-like polymers”
    Current Opinion in Chemical Engineering, 24, 61-68 (2019)
  6. 片島拓弥、酒井崇匡、「均一網目構造を用いた高分子ゲルの弾性と構造の相関の研究」
    ネットワークポリマー, (37), 2, 73-80 (2016) 
  7. 片島拓弥、倉員麻奈美、赤木友紀、鄭雄一、酒井崇匡、「高分子ゲルにおける調製時および測定時高分子体積分率と力学特性の関係」
    日本レオロジー学会誌, (42), 2, 97-102 (2014) 

Books and Chapters

  1. 技術情報協会編、「動的粘弾性測定とそのデータ解釈事例」
    技術情報協会 (一部分担4-1章) (2021年)
  2. Takamasa Sakai “Physics of Polymer Gels”
    Wiley‐VCH Verlag GmbH & Co. KGaA (2020) (一部分担)
  3. 高分子学会編、「基礎高分子化学 第2版」
    東京化学同人 (一部分担8-2章) (2020年)
  4. 酒井崇匡、赤木友紀、片島拓弥、Xiang Li「高分子ゲルの物理学」

Invited Talks

  1. 片島拓弥、星型高分子からなる過渡的網目のミクロな動力学とマクロレオロジー特性の相関、共有結合の交換・変換・切断が司る機能樹脂創成に向けた研究会 (信州大学) 2023年12月15日
  2. 片島拓弥、高分子網目系のレオロジー、第43回レオロジー講座 -基礎と測定法- (日本レオロジー学会)、2023年12月12日
  3. Takuya Katashima, Elucidation of viscoelastic relaxation of transient networks with well-defined structures, 9th International Discussion Meeting on Relaxations in Complex Systems (zoom online), 2023年8月17日
  4. Takuya Katashima, Relationships between viscoelastic relaxation and network connectivity in transient networks with well-controlled network structures, 8th Pacific Rim Conference on Rheology (University of British Columbia), 2023年5月18日 (基調講演)
  5. 片島拓弥、明確な構造を持つ永久および過渡的高分子網目材料の精密レオロジー解析、日本レオロジー学会第50回記念年会 (京都大学) 2023年5月11日 (受賞講演)
  6. 片島拓弥 “星型ポリマーからなる会合性網目の物性とバイオマテリアル応用への試み”第183回東海高分子研究会講演会(夏季研究会)(名古屋大学) 2022年9月17日
  7. Takuya Katashima “Mechanical Properties of Dynamic Cross-Linked Hydrogels with well-controlled structures and Biomedical Applications” 第71回高分子討論会『日韓ジョイントセッション』(北海道大学) 2022年9月7日
  8. 片島拓弥 “網目構造の制御された会合性高分子網目を用いたミクロ動力学とマクロ物性の相関解明”, 第98回高分子若手研究会[関西]  (オンライン) 2022年7月9日
  9. 片島拓弥 “スライムのレオロジー”, 関東高分子若手会 (オンライン) 2021年8月4日
  10. Takuya Katashima “Viscoelastic Study on Transient Networks Composed of Mutually Reactive Branched Polymers”, 3rd GLowing Polymer Symposium in KANTO (GPS-K 2020), 2020 年 11 月 28 日
  11. 片島拓弥 “Mechanical properties of doubly crosslinked gels”, 第69回高分子学会年次大会 2020年5月28日 (受賞講演)
  12. Takuya Katashima, Takamasa Sakai, and Tadashi Inoue, “Rheological Properties of Associative Polymer Networks Trapped in Chemically Crosslinked Polymer Networks”, XVIIth International Congress on Rheology (ICR2016) (Kyoto), 2016 年 8 月 10 日 (基調講演)
  13. Takuya Katashima, “Rheological property of interpenetrating network with permanent and transient networks”, OIST Seminar (沖縄科学技術大学大学院), 9th Nov. 2016
  14. 片島拓弥 “構造の制御された高分子ゲルの歪エネルギー密度関数”, 関西レオロジー研究会 (大阪市立大学文化交流センター), 2015 年 11 月 19 日
  15. Takuya Katashima, “Swelling and mechanical properties of Tetra-PEG gels”, ICR Polymer Physics Workshop 2014 (京都大学化学研究所), 18th Sep. 2014