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Lu YC, Hsu YT, Yang TY, Liou IC, Wang SW, Huang PC, Lee JJ, Lai LL, Hsu HF. Converting non-Mesogenic to Mesogenic Stacking of Amino- s-Triazine-Based Dendrons with p-CN Phenyl Unit by Eliminating Peripheral Dipole. NANOMATERIALS 2022; 12:nano12020185. [PMID: 35055204 PMCID: PMC8782037 DOI: 10.3390/nano12020185] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/19/2021] [Revised: 12/20/2021] [Accepted: 12/31/2021] [Indexed: 12/04/2022]
Abstract
Three new amino-s-triazine-based dendrons, 1a, 1b, and 1c, containing an aryl-CN moiety in the dendritic skeleton were prepared in 72–81% yields (1a: R1 = − N(n-C8H17)2, R2 = n-OC8H17, 1b: R1 = R2 = − N(n-C8H17)2, 1c: R1 = − N(n-C8H17)2, R2 = − N(n-C4H9)2). Dendrons 1a with N(n-C8H17)2 and n-OC8H17 peripheral substituents, surprisingly, did not show any mesogenic phase during the thermal process. However, non-mesogenic 1a can be converted to mesogenic 1b or 1c by eliminating the peripheral dipole arising from the alkoxy substituent; dendron 1b only comprising the same N(n-C8H17)2 peripheral groups showed a ~25 °C mesogenic range on heating and ~108 °C mesogenic range on cooling. In contrast, dendron 1c possessing different N(n-CmH2m+1)2 (m = 8 versus m = 4) peripheral units, having similar stacking as 1b, exhibited a columnar phase on thermal treatment, but its mesogenic range (~9 and ~66 °C on heating and cooling, respectively) was much narrower than that of 1b, attributed to 1c’s less flexible alkyl chains in the peripheral part of dendron. Dendron 1a with the alkoxy substituent in the peripheral skeleton, creating additional dipole correspondingly, thus, leads to the dendritic molecules having a non-mesogenic stacking. Without the peripheral dipole for intermolecular side-by-side interaction, dendrons 1b and 1c exhibit a columnar phase on thermal treatment because of the vibration from the peripheral alkyl chain.
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Affiliation(s)
- Yao-Chih Lu
- Department of Applied Chemistry, National Chi Nan University, No. 1 University Rd., Puli, Nantou 545, Taiwan; (Y.-C.L.); (T.-Y.Y.); (I.-C.L.); (S.-W.W.)
| | - Yu-Tsz Hsu
- Department of Chemistry, Tamkang University, No. 151, Yingzhuan Rd., New Taipei City 251, Taiwan;
| | - Tsung-Yen Yang
- Department of Applied Chemistry, National Chi Nan University, No. 1 University Rd., Puli, Nantou 545, Taiwan; (Y.-C.L.); (T.-Y.Y.); (I.-C.L.); (S.-W.W.)
| | - I-Chun Liou
- Department of Applied Chemistry, National Chi Nan University, No. 1 University Rd., Puli, Nantou 545, Taiwan; (Y.-C.L.); (T.-Y.Y.); (I.-C.L.); (S.-W.W.)
| | - Sheng-Wei Wang
- Department of Applied Chemistry, National Chi Nan University, No. 1 University Rd., Puli, Nantou 545, Taiwan; (Y.-C.L.); (T.-Y.Y.); (I.-C.L.); (S.-W.W.)
| | - Po-Chia Huang
- National Synchrotron Radiation Research Center, No. 101, Hsin-Ann Rd., Hsinchu 300, Taiwan; (P.-C.H.); (J.-J.L.)
| | - Jey-Jau Lee
- National Synchrotron Radiation Research Center, No. 101, Hsin-Ann Rd., Hsinchu 300, Taiwan; (P.-C.H.); (J.-J.L.)
| | - Long-Li Lai
- Department of Applied Chemistry, National Chi Nan University, No. 1 University Rd., Puli, Nantou 545, Taiwan; (Y.-C.L.); (T.-Y.Y.); (I.-C.L.); (S.-W.W.)
- Correspondence: (L.-L.L.); (H.-F.H.)
| | - Hsiu-Fu Hsu
- Department of Chemistry, Tamkang University, No. 151, Yingzhuan Rd., New Taipei City 251, Taiwan;
- Correspondence: (L.-L.L.); (H.-F.H.)
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Zhan Y, Fu W, Xing Y, Ma X, Chen C. Advances in versatile anti-swelling polymer hydrogels. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2021; 127:112208. [PMID: 34225860 DOI: 10.1016/j.msec.2021.112208] [Citation(s) in RCA: 61] [Impact Index Per Article: 20.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/24/2021] [Revised: 05/18/2021] [Accepted: 05/22/2021] [Indexed: 12/20/2022]
Abstract
Swelling is ubiquitous for traditional as-prepared hydrogels, but is unfavorable in many situations, especially biomedical applications, such as tissue engineering, internal wound closure, soft actuating and bioelectronics, and so forth. As the swelling of a hydrogel usually leads to a volume expansion, which not only deteriorates the mechanical property of the hydrogel but can bring about undesirable oppression on the surrounding tissues when applied in vivo. In contrast, anti-swelling hydrogels hardly alter their volume when applied in aqueous environment, therefore reserving the original mechanical performance and size-stability and facilitating their potential application. In the past decade, with the development of advanced hydrogels, quite a number of anti-swelling hydrogels with versatile functions have been developed by researchers to meet the practical applications well, through integrating anti-swelling property with certain performance or functionality, such as high strength, self-healing, injectability, adhesiveness, antiseptics, etc. However, there has not been a general summary with regard to these hydrogels. To promote the construction of anti-swelling hydrogels with desirable functionalities in the future, this review generalizes and analyzes the tactics employed so far in the design and manufacture of anti-swelling hydrogels, starting from the viewpoint of classical swelling theories. The review will provide a relatively comprehensive understanding of anti-swelling hydrogels and clues to researchers interested in this kind of materials to develop more advanced ones suitable for practical application.
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Affiliation(s)
- Yiwei Zhan
- College of Chemistry and Chemical Engineering, Qingdao University, Qingdao 266071, PR China
| | - Wenjiao Fu
- CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology of China, Beijing 100190, PR China.
| | - Yacheng Xing
- College of Chemistry and Chemical Engineering, Qingdao University, Qingdao 266071, PR China.
| | - Xiaomei Ma
- College of Chemistry and Chemical Engineering, Qingdao University, Qingdao 266071, PR China; State Key Laboratory of Bio-Fibers and Eco-Textiles, Qingdao University, Qingdao 266071, PR China.
| | - Chunying Chen
- CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology of China, Beijing 100190, PR China.
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Zhang H, Zheng S, Chen C, Zhang D. A graphene hybrid supramolecular hydrogel with high stretchability, self-healable and photothermally responsive properties for wound healing. RSC Adv 2021; 11:6367-6373. [PMID: 35423140 PMCID: PMC8694836 DOI: 10.1039/d0ra09106e] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2020] [Accepted: 01/22/2021] [Indexed: 12/28/2022] Open
Abstract
Wound healing is a ubiquitous healthcare problem in clinical wound management. In this paper, the fabrication of a graphene hybrid supramolecular hydrogel (GS hydrogel) for wound dressing applications is demonstrated. The hydrogel is composed of two components, including N-acryloyl glycinamide (NAGA) as the scaffold and graphene as the photothermally responsive active site for photothermal therapy. Based on the multiple hydrogen bonds between the dual amide motifs in the side chain of N-acryloyl glycinamide, the hydrogel exhibits high tensile strength (≈1.7 MPa), good stretchability (≈400%) and self-recoverability. In addition, the GS hydrogel shows excellent antibacterial activity towards methicillin-resistant Staphylococcus aureus (MRSA), benefiting from the addition of graphene that possesses great photothermal transition activity (≈85%). Significantly, in vivo animal experiments also demonstrated that the GS hydrogel effectively accelerates the wound healing processes by eradicating microbes, promoting collagen deposition and angiogenesis. In summary, this GS hydrogel demonstrates excellent mechanical performance, photothermal antimicrobial activity, and promotes skin tissue regeneration, and so has great application potential as a promising wound dressing material in clinical use.
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Affiliation(s)
- Haifeng Zhang
- Department of Surgery, Nanjing Center Hospital Nanjing 210000 China
| | - Shiya Zheng
- Zhongda Hospital, School of Medicine, Southeast University Nanjing 210009 China
| | - Canwen Chen
- Department of General Surgery, Affiliated Jinling Hospital, Medical School of Nanjing University Nanjing 210002 China
| | - Dagan Zhang
- Institute of Translational Medicine, The Affiliated Drum Tower Hospital, Medical School of Nanjing University Nanjing 210008 China
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Wang Q, Shi Z, Shou Y, Zhang K, Li G, Xia P, Yan S, Yin J. Stack-Based Hydrogels with Mechanical Enhancement, High Stability, Self-Healing Property, and Thermoplasticity from Poly(l-glutamic acid) and Ureido-Pyrimidinone. ACS Biomater Sci Eng 2020; 6:1715-1726. [DOI: 10.1021/acsbiomaterials.0c00010] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Qi Wang
- Department of Polymer Materials, School of Materials Science and Engineering, Shanghai University, No. 99 Shangda Road, Shanghai 200444, P. R. China
| | - Zhen Shi
- Department of Polymer Materials, School of Materials Science and Engineering, Shanghai University, No. 99 Shangda Road, Shanghai 200444, P. R. China
| | - Yufeng Shou
- Department of Polymer Materials, School of Materials Science and Engineering, Shanghai University, No. 99 Shangda Road, Shanghai 200444, P. R. China
| | - Kunxi Zhang
- Department of Polymer Materials, School of Materials Science and Engineering, Shanghai University, No. 99 Shangda Road, Shanghai 200444, P. R. China
| | - Guifei Li
- Department of Polymer Materials, School of Materials Science and Engineering, Shanghai University, No. 99 Shangda Road, Shanghai 200444, P. R. China
| | - Pengfei Xia
- Department of Polymer Materials, School of Materials Science and Engineering, Shanghai University, No. 99 Shangda Road, Shanghai 200444, P. R. China
| | - Shifeng Yan
- Department of Polymer Materials, School of Materials Science and Engineering, Shanghai University, No. 99 Shangda Road, Shanghai 200444, P. R. China
| | - Jingbo Yin
- Department of Polymer Materials, School of Materials Science and Engineering, Shanghai University, No. 99 Shangda Road, Shanghai 200444, P. R. China
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