Mussel-inspired 3D networks with stiff-irreversible or soft-reversible characteristics - It's all a matter of solvent |
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| Institution: | 1. Nanshan District Key Lab for Biopolymers and Safety Evaluation, College of Materials Science and Engineering and Department of Optoelectronic Engineering, Shenzhen University, Shenzhen, Guangdong, China;2. Chonbuk National University, School of Semiconductor and Chemical Engineering, Baekjero 567, Deokjin-gu, Jeonju, Jeonbuk 561–756, Republic of Korea;3. Department of Chemical Engineering, NED University of Engineering & Technology, University Road, Karachi 75270, Pakistan;4. Advanced Pharmaceutics and Drug Delivery Laboratory, Leslie Dan Faculty of Pharmacy, University of Toronto, 144 College Street, Ontario M5S 3M2, Canada;5. DSM Biomedical, 735 Pennsylvania Dr, Exton, PA 19341, USA;1. The Key Laboratory of Polymer Processing Engineering, Ministry of Education, South China University of Technology, Guangzhou 510640, China;2. Research and Development Department, Zhejiang Zhongning Silicon Company Ltd, QuZhou 324000, China;3. School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China;1. MMRI/ CAPPA-D, Department of Chemical Engineering, McMaster University, Hamilton, Ontario L8S 4L7, Canada;2. 3M Canada Company, London, Ontario, Canada;1. CTR Repsol, Móstoles, 28931 Madrid, Spain;2. Instituto de Ciencia y Tecnología de Polímeros, ICTP-CSIC, Juan de la Cierva 3, 28006 Madrid, Spain;3. Escuela Superior de Ciencias Experimentales y Tecnología, Universidad Rey Juan Carlos, 28933 Móstoles, Madrid, Spain;1. Dipartimento di Ingegneria Chimica, dei Materiali e della Produzione Industriale, University of Naples Federico II, P.le Tecchio 80, 80125 Naples, Italy;2. Dow Italia s.r.l, Polyurethanes R&D, via Carpi 29, 42015 Correggio, Italy;3. Institute for Macromolecular Studies, National Research Council, Via Edoardo Bassini, 15, 20133 Milan, Italy |
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| Abstract: | Mostly, catechol groups are used as cross-linkers either based on oxidation to make irreversible networks in presence of oxidizing agent or coordination with metal ions to form reversible networks. However, a systematic study of gelation of catecholic polymer by adding oxidizing agent in non-aqueous solvents are scarce. Here, we report a study of gelation of catecholic polymer by adding oxidizing agent in different media to show the effect of media on behavior of catechol groups. When the gelation performed in an aprotic solvent, the copolymer containing catechol units gelates supramolecularly by H-bonding, yielding reversible and self-healing behavior, while in aqueous solvents irreversibly crosslinked not self-healing gels are obtained. As polymer-bound catechol groups are often studied in water, knowledge of the behavior of catecholic polymer in organic solvents is important to create supramolecular structures with more precisely controlled properties. |
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| Keywords: | Mussel-inspired Catecholic chemistry Self-healing Hydrogels Rheology |
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