Abstract
One promising application of self-healing polymeric materials is biomedical use. Although charge-transfer (CT) interactions have been employed to construct self-healing polymers as well as other reversible bonds and interactions, their potential for biomedical applications has never been investigated. In this study, we fabricated self-healable and cell-compatible polyurethane elastomers cross-linked by CT complexes between electron-rich pyrene (Py) and electron-deficient naphthalene diimide (NDI) by simply blending two linear polymers with Py or NDI as a repeating unit. The elastomers with different blend ratios self-healed damage over 1 day in mild conditions, including in air and water at 30–100 °C. The mechanical properties of damaged elastomers were almost restored after healing in air at 100 °C, and even in air at 30 °C and in water at 70 °C, healing was also possible to a certain extent. The good cell compatibility of the polyurethane elastomers was demonstrated by culturing two kinds of cells on the thin film substrates.
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References
Herbst F, Döhler D, Michael P, Binder WH. Self-healing polymers via supramolecular forces. Macromol Rapid Commun. 2013;34:203–20.
Harada A, Takashima Y, Nakahata M. Supramolecular polymeric materials via cyclodextrin–guest interactions. Acc Chem Res. 2014;47:2128–40.
Roy N, Bruchmann B, Lehn J-M. DYNAMERS: dynamic polymers as self-healing materials. Chem Soc Rev. 2015;44:3786–807.
Yang Y, Ding X, Urban MW. Chemical and physical aspects of self-healing materials. Prog Polym Sci. 2015;49-50:34–59.
Imato K, Otsuka H. Dynamic Covalent Chemistry: Principles, Reactions and Applications. In: Zhang W, Jin Y, editors. Hoboken, NJ, USA: John Wiley & Sons; 2017. p. 359–87.
Imato K, Otsuka H. Reorganizable and stimuli-responsive polymers based on dynamic carbon-carbon linkages in diarylbibenzofuranones. Polymer. 2018;137:395–413.
Dahlke J, Zechel S, Hager MD, Schubert US. How to design a self-healing polymer: general concepts of dynamic covalent bonds and their application for intrinsic healable materials. Adv Mater Interfaces. 2018;50:1800051.
Diesendruck CE, Sottos NR, Moore JS, White SR. Biomimetic self-healing. Angew Chem Int Ed. 2015;54:10428–47.
Patrick JF, Robb MJ, Sottos NR, Moore JS, White SR. Polymers with autonomous life-cycle control. Nature. 2016;540:363–70.
Levchenko I, Bazaka K, Belmonte T, Keidar M, Xu S. Advanced materials for next-generation spacecraft. Adv Mater. 2018;41:1802201.
Tu Y, Chen N, Li C, Liu H, Zhu R, Chen S, et al. Advances in injectable self-healing biomedical hydrogels. Acta Biomater. 2019;90:1–20.
Talebian S, Mehrali M, Taebnia N, Pennisi CP, Kadumudi FB, Foroughi J, et al. Self‐healing hydrogels: the next paradigm shift in tissue engineering? Adv Sci. 2019;6:1801664.
Uman S, Dhand A, Burdick JA. Recent advances in shear‐thinning and self‐healing hydrogels for biomedical applications. J Appl Polym Sci. 2019;336:48668–20.
Yanagisawa Y, Nan Y, Okuro K, Aida T. Mechanically robust, readily repairable polymers via tailored noncovalent cross-linking. Science. 2018;359:72–76.
Zhao J, Xu R, Luo G, Wu J, Xia H. Self-healing poly(siloxane-urethane) elastomers with remoldability, shape memory and biocompatibility. Polym Chem. 2016;7:7278–86.
Zhao J, Xu R, Luo G, Wu J, Xia H. A self-healing, re-moldable and biocompatible crosslinked polysiloxane elastomer. J Mater Chem B. 2016;4:982–9.
Daemi H, Rajabi-Zeleti S, Sardon H, Barikani M, Khademhosseini A, Baharvand H. A robust super-tough biodegradable elastomer engineered by supramolecular ionic interactions. Biomaterials. 2016;84:54–63.
Chen S, Bi X, Sun L, Gao J, Huang P, Fan X, et al. Poly(sebacoyl diglyceride) cross-linked by dynamic hydrogen bonds: a self-healing and functionalizable thermoplastic bioelastomer. ACS Appl Mater Interfaces. 2016;8:20591–9.
Wu Y, Wang L, Zhao X, Hou Sen, Guo B, Ma PX. Self-healing supramolecular bioelastomers with shape memory property as a multifunctional platform for biomedical applications via modular assembly. Biomaterials. 2016;104:18–31.
Liu L, Zhu L, Zhang L. A solvent-resistant and biocompatible self-healing supramolecular elastomer with tunable mechanical properties. Macromol Chem Phys. 2017;219:1700409–7.
Tallia F, Russo L, Li S, Orrin ALH, Shi X, Chen S, et al. Bouncing and 3D printable hybrids with self-healing properties. Mater Horiz. 2018;5:849–60.
Li F, Ye Q, Gao Q, Chen H, Shi SQ, Zhou W, et al. Facile fabrication of self-healable and antibacterial soy protein-based films with high mechanical strength. ACS Appl Mater Interfaces. 2019;11:16107–16.
Liu J, Duan W, Song J, Guo X, Wang Z, Shi X, et al. Self-healing hyper-cross-linked metal–organic polyhedra (HCMOPs) membranes with antimicrobial activity and highly selective separation properties. J Am Chem Soc. 2019;141:12064–70.
Zeimaran E, Pourshahrestani S, Kadri NA, Kong D, Shirazi SFS, Naveen SV, et al. Self‐healing polyester urethane supramolecular elastomers reinforced with cellulose nanocrystals for biomedical applications. Macromol Biosci. 2019;19:1900176–12.
Imato K, Yamanaka R, Nakajima H, Takeda N. Fluorescent supramolecular mechanophores based on charge-transfer interactions. Chem Commun. 2020;56:7937–40.
Cordier P, Tournilhac F, Soulié-Ziakovic C, Leibler L. Self-healing and thermoreversible rubber from supramolecular assembly. Nature. 2008;451:977–80.
Tamate R, Hashimoto K, Horii T, Hirasawa M, Li X, Shibayama M, et al. Self-healing micellar ion gels based on multiple hydrogen bonding. Adv Mater. 2018;30:1802792–7.
Burattini S, Colquhoun HM, Fox JD, Friedmann D, Greenland BW, Harris PJF, et al. A self-repairing, supramolecular polymer system: healability as a consequence of donor–acceptor π–π stacking interactions. Chem Commun. 2009;6717–9.
Burattini S, Greenland BW, Merino DH, Weng W, Seppala J, Colquhoun HM, et al. A healable supramolecular polymer blend based on aromatic π−π stacking and hydrogen-bonding interactions. J Am Chem Soc. 2010;132:12051–8.
Fox J, Wie JJ, Greenland BW, Burattini S, Hayes W, Colquhoun HM, et al. High-strength, healable, supramolecular polymer nanocomposites. J Am Chem Soc. 2012;134:5362–8.
Hart LR, Harries JL, Greenland BW, Colquhoun HM, Hayes W. Supramolecular approach to new inkjet printing inks. ACS Appl Mater Interfaces. 2015;7:8906–14.
Hart LR, Nguyen NA, Harries JL, Mackay ME, Colquhoun HM, Hayes W. Perylene as an electron-rich moiety in healable, complementary π-π stacked, supramolecular polymer systems. Polymer. 2015;69:293–300.
Qin J, Lin F, Hubble D, Wang Y, Li Y, Murphy IA, et al. Tuning self-healing properties of stiff, ion-conductive polymers. J Mater Chem A. 2019;7:6773–83.
Xiao W-X, Liu D, Fan C-J, Xiao Y, Yang K-K, Wang Y-Z. A high-strength and healable shape memory supramolecular polymer based on pyrene-naphthalene diimide complexes. Polymer. 2020;190:122228.
Imato K, Takahara A, Otsuka H. Self-healing of a cross-linked polymer with dynamic covalent linkages at mild temperature and evaluation at macroscopic and molecular levels. Macromolecules. 2015;48:5632–9.
Imato K, Natterodt JC, Sapkota J, Goseki R, Weder C, Takahara A, et al. Dynamic covalent diarylbibenzofuranone-modified nanocellulose: mechanochromic behaviour and application in self-healing polymer composites. Polym Chem. 2017;8:2115–22.
Kim S-M, Jeon H, Shin S-H, Park S-A, Jegal J, Hwang SY, et al. Superior toughness and fast self-healing at room temperature engineered by transparent elastomers. Adv Mater. 2018;30:1705145–8.
Zhang L, Liu Z, Wu X, Guan Q, Chen S, Sun L, et al. A highly efficient self-healing elastomer with unprecedented mechanical properties. Adv Mater. 2019;31:1901402–8.
Hornat CC, Urban MW. Entropy and interfacial energy driven self-healable polymers. Nat Commun. 2020;11:1028.
Gunatillake PA, Adhikari R, Gadegaard N. Biodegradable synthetic polymers for tissue engineering. Eur Cells Mater. 2003;5:1–16.
Teo AJT, Mishra A, Park I, Kim Y-J, Park WT, Yoon YJ. Polymeric biomaterials for medical implants and devices. ACS Biomater Sci Eng. 2016;2:454–72.
Imato K, Nishihara M, Kanehara T, Amamoto Y, Takahara A, Otsuka H. Self-healing of chemical gels cross-linked by diarylbibenzofuranone-based trigger-free dynamic covalent bonds at room temperature. Angew Chem Int Ed. 2012;51:1138–42.
Imato K, Ohishi T, Nishihara M, Takahara A, Otsuka H. Network reorganization of dynamic covalent polymer gels with exchangeable diarylbibenzofuranone at ambient temperature. J Am Chem Soc. 2014;136:11839–45.
Imato K, Irie A, Kosuge T, Ohishi T, Nishihara M, Takahara A, et al. Mechanophores with a reversible radical system and freezing-induced mechanochemistry in polymer solutions and gels. Angew Chem Int Ed. 2015;54:6168–72.
Imato K, Kanehara T, Nojima S, Ohishi T, Higaki Y, Takahara A, et al. Repeatable mechanochemical activation of dynamic covalent bonds in thermoplastic elastomers. Chem Commun. 2016;52:10482–5.
Sun TL, Kurokawa T, Kuroda S, Ihsan AB, Akasaki T, Sato K, et al. Physical hydrogels composed of polyampholytes demonstrate high toughness and viscoelasticity. Nat Mater. 2013;12:932–7.
Nakahata M, Takashima Y, Harada A. Highly flexible, tough, and self-healing supramolecular polymeric materials using host-guest interaction. Macromol Rapid Commun. 2016;37:86–92.
He D, Arisaka Y, Masuda K, Yamamoto M, Takeda N. A photoresponsive soft interface reversibly controls wettability and cell adhesion by conformational changes in a spiropyran-conjugated amphiphilic block copolymer. Acta Biomater. 2017;51:101–11.
Tamada Y, Yoshito I. Effect of preadsorbed proteins on cell adhesion to polymer surfaces. J Colloid Interface Sci. 1993;155:334–9.
Li Y, Xiao Y, Liu C. The Horizon of Materiobiology: A perspective on material-guided cell behaviors and tissue engineering. Chem Rev. 2017;117:4376–421.
Acknowledgements
This work was supported by JSPS KAKENHI (Grant No. 16H07292 and 19K15623, KI), MEXT LEADER (Grant No. A6501, KI), and the Izumi Science and Technology Foundation (Grant No. H29-J-113, KI). A research grant from the Mitsubishi Materials–Faculty of Science and Engineering, Waseda University (2016, 2018) and a Grant for Young Scientists Encouragement from the Waseda Research Institute for Science and Engineering–JXTG Energy (2017) are also acknowledged for financial support.
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Imato, K., Nakajima, H., Yamanaka, R. et al. Self-healing polyurethane elastomers based on charge-transfer interactions for biomedical applications. Polym J 53, 355–362 (2021). https://doi.org/10.1038/s41428-020-00432-4
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DOI: https://doi.org/10.1038/s41428-020-00432-4