1
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Gu J, Liu M, Li L, Zhou L, He L, Deng W, Hu J. Osmanthus fragrance polyurethane/silk
fibroin‐based double‐shell
microcapsules for aromatic leather with sustained release fragrance. FLAVOUR FRAG J 2023. [DOI: 10.1002/ffj.3727] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Jiaying Gu
- School of Perfume and Aroma Technology Shanghai Institute of Technology Shanghai China
| | - Ming Liu
- School of Perfume and Aroma Technology Shanghai Institute of Technology Shanghai China
| | - Lin Li
- School of Perfume and Aroma Technology Shanghai Institute of Technology Shanghai China
| | - Lulu Zhou
- School of Perfume and Aroma Technology Shanghai Institute of Technology Shanghai China
| | - Lei He
- School of Perfume and Aroma Technology Shanghai Institute of Technology Shanghai China
| | - Weijun Deng
- School of Chemical and Environmental Engineering Shanghai Institute of Technology Shanghai China
| | - Jing Hu
- School of Perfume and Aroma Technology Shanghai Institute of Technology Shanghai China
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2
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Jung YS, Woo J, Lee E, Lee S, Shin EJ. Synthesis and properties of bio-based thermoplastic poly(ether urethane) for soft actuators. JOURNAL OF POLYMER RESEARCH 2022. [DOI: 10.1007/s10965-022-03375-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
AbstractIn this study, bio-based thermoplastic polyurethane (TPU) for use in soft actuators is bio-based poly(ether-urethane) made using fermented corn, along with bio-derived compounds such as propane-1,3-diol (PDO) as a chain extender. Bio-based TPUs were obtained through a solvent-free one-shot synthesis method, and the effects of varying the [NCO]/[OH] molar ratio and type of isocyanates on chemical structure, thermal stability, and mechanical properties were investigated. The degree of phase separation (DPS) and state of hard segment (HS) / soft segment (SS) of TPU are important factors affecting the thermal and physical properties of the prepared film. These properties depend on the [NCO]/[OH] molar ratio and the type of isocyanates used for polymerization. The results showed that, when aromatic isocyanate was used, the degree of separation of the HS/SS was improved as the molar ratio increased. The average molecular weight and DPS as well as thermal and mechanical properties of 1-isocyanato-4-[(4-isocyanatophenyl)methyl]benzene (MDI)-based TPU samples are all higher than those of 1,1’-methylenebis(4-isocyanatocyclohexane) (H12MDI)-based TPU samples in spite of the lower HS content. These findings of this study are expected to contribute to the preparation of fused deposition modeling (FDM) 3D printing or 4D printing for shape memory polymer from bio-based TPU filaments for use in soft actuators with a shore hardness range of 59~84A.
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3
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One-Shot Synthesis of Thermoplastic Polyurethane Based on Bio-Polyol (Polytrimethylene Ether Glycol) and Characterization of Micro-Phase Separation. Polymers (Basel) 2022; 14:polym14204269. [PMID: 36297847 PMCID: PMC9610669 DOI: 10.3390/polym14204269] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2022] [Revised: 10/07/2022] [Accepted: 10/08/2022] [Indexed: 11/24/2022] Open
Abstract
In this study, a series of bio-based thermoplastic polyurethane (TPU) was synthesized via the solvent-free one-shot method using 100% bio-based polyether polyol, prepared from fermented corn, and 1,4-butanediol (BDO) as a chain extender. The average molecular weight, degree of phase separation, thermal and mechanical properties of the TPU-based aromatic (4,4-methylene diphenyl diisocyanate: MDI), and aliphatic (bis(4-isocyanatocyclohexyl) methane: H12MDI) isocyanates were investigated by gel permeation chromatography, Fourier transform infrared spectroscopy, atomic force microscopy, X-ray Diffraction, differential scanning calorimetry, dynamic mechanical thermal analysis, and thermogravimetric analysis. Four types of micro-phase separation forms of a hard segment (HS) and soft segment (SS) were suggested according to the [NCO]/[OH] molar ratio and isocyanate type. The results showed (a) phase-mixed disassociated structure between HS and SS, (b) hydrogen-bonded structure of phase-separated between HS and SS forming one-sided hard domains, (c) hydrogen-bonded structure of phase-mixed between HS, and SS and (d) hydrogen-bonded structure of phase-separated between HS and SS forming dispersed hard domains. These phase micro-structure models could be matched with each bio-based TPU sample. Accordingly, H-BDO-2.0, M-BDO-2.0, H-BDO-2.5, and M-BDO-3.0 could be related to the (a)—form, (b)—form, (c)—form, and (d)—form, respectively.
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4
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Johari N, Khodaei A, Samadikuchaksaraei A, Reis RL, Kundu SC, Moroni L. Ancient fibrous biomaterials from silkworm protein fibroin and spider silk blends: Biomechanical patterns. Acta Biomater 2022; 153:38-67. [PMID: 36126911 DOI: 10.1016/j.actbio.2022.09.030] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2022] [Revised: 08/26/2022] [Accepted: 09/13/2022] [Indexed: 11/15/2022]
Abstract
Silkworm silk protein fibroin and spider silk spidroin are known biocompatible and natural biodegradable polymers in biomedical applications. The presence of β-sheets in silk fibroin and spider spidroin conformation improves their mechanical properties. The strength and toughness of pure recombinant silkworm fibroin and spidroin are relatively low due to reduced molecular weight. Hence, blending is the foremost approach of recent studies to optimize silk fibroin and spidroin's mechanical properties. As summarised in the present review, numerous research investigations evaluate the blending of natural and synthetic polymers. The effects of blending silk fibroin and spidroin with natural and synthetic polymers on the mechanical properties are discussed in this review article. Indeed, combining natural and synthetic polymers with silk fibroin and spidroin changes their conformation and structure, fine-tuning the blends' mechanical properties. STATEMENT OF SIGNIFICANCE: Silkworm and spider silk proteins (silk fibroin and spidroin) are biocompatible and biodegradable natural polymers having different types of biomedical applications. Their mechanical and biological properties may be tuned through various strategies such as blending, conjugating and cross-linking. Blending is the most common method to modify fibroin and spidroin properties on demand, this review article aims to categorize and evaluate the effects of blending fibroin and spidroin with different natural and synthetic polymers. Increased polarity and hydrophilicity end to hydrogen bonding triggered conformational change in fibroin and spidroin blends. The effect of polarity and hydrophilicity of the blending compound is discussed and categorized to a combinatorial, synergistic and indirect impacts. This outlook guides us to choose the blending compounds mindfully as this mixing affects the biochemical and biophysical characteristics of the biomaterials.
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Affiliation(s)
- Narges Johari
- Materials Engineering group, Golpayegan College of Engineering, Isfahan University of Technology, Golpayegan, Iran.
| | - Azin Khodaei
- Department of Orthopedics, University Medical Center Utrecht, Utrecht, The Netherlands.
| | - Ali Samadikuchaksaraei
- Department of Medical Biotechnology, Faculty of Allied Medicine, Iran University of Medical Science, Tehran, Iran.
| | - Rui L Reis
- 3B's Research Group, I3Bs - Research Institute on Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark, Parque de Ciência e Tecnologia, 4805-017 Barco, Guimarães, Portugal.
| | - Subhas C Kundu
- 3B's Research Group, I3Bs - Research Institute on Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark, Parque de Ciência e Tecnologia, 4805-017 Barco, Guimarães, Portugal.
| | - Lorenzo Moroni
- Maastricht University, MERLN Institute for Technology Inspired Regenerative Medicine, Complex Tissue Regeneration Department, Maastricht, The Netherlands.
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5
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Yin X, Li L, Pang H, Luo Y, Zhang B. Halogen-free instinct flame-retardant waterborne polyurethanes: composition, performance, and application. RSC Adv 2022; 12:14509-14520. [PMID: 35702241 PMCID: PMC9102897 DOI: 10.1039/d2ra01822e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2022] [Accepted: 04/25/2022] [Indexed: 11/21/2022] Open
Abstract
Ideal halogen-free instinct flame-retardant waterborne polyurethanes have high flame-retardant efficiency, environmental friendliness, fine compatibility, and good thermostability. Phosphorus flame-retardants are currently widely used in halogen-free instinct flame-retardant waterborne polyurethanes (HIFWPU), especially those with phosphorous-nitrogen co-structures. Phosphorous-nitrogen HIFWPU have become a hotspot because their co-structures provide higher flame-retardance as compared to waterborne polyurethanes. This review introduces three main types of HIFWPU based on composition, performance and application. HIFWPU not only have improved flame-retardance but also satisfy the various requirements for functionality. HIFWPU have been widely developed in textile, furniture, automobile, and aerospace applications.
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Affiliation(s)
- Xuan Yin
- College of Mechanical and Electrical Engineering, Beijing University of Chemical Technology Beijing 100029 China
- Beijing Institute of Technology Beijing 100081 China
| | - Liqi Li
- College of Mechanical and Electrical Engineering, Beijing University of Chemical Technology Beijing 100029 China
| | - Haosheng Pang
- Department of Mechanical Engineering, Tsinghua University Beijing 100084 China
| | - Yunjun Luo
- Beijing Institute of Technology Beijing 100081 China
| | - Bing Zhang
- College of Mechanical and Electrical Engineering, Beijing University of Chemical Technology Beijing 100029 China
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6
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Ionic Cross-Linkable Alendronate-Conjugated Biodegradable Polyurethane Films for Potential Guided Bone Regeneration. Macromol Res 2022. [DOI: 10.1007/s13233-022-0014-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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7
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Akram N, Saeed M, Usman M. Role of Macrodiols in the Synthesis and Thermo-Mechanical Behavior of Anti-Tack Water Borne Polyurethane Dispersions. Polymers (Basel) 2022; 14:polym14030572. [PMID: 35160561 PMCID: PMC8839335 DOI: 10.3390/polym14030572] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2021] [Revised: 01/17/2022] [Accepted: 01/24/2022] [Indexed: 02/06/2023] Open
Abstract
The texture and molecular weight of polymer drastically affect the adhesion or tack strength. Waterborne polyurethane dispersions (WBPU) have been prepared using two different macrodiols of hydroxyl terminated polybutadiene (HTPB; Mn = 2912 g/mol−1) and four compositions of Polypropylene glycol (PPG Mn = 425, 1000, 2000, 2700 g/mol−1). The contents of the macrodiols have been varied using HTPB as 5, 10 and 15 mol%. The prepolymer of HTPB and Poly propylene glycol (PPG) have been developed using 4,4-Methylene bis(cyclohexyl isocyanate) (H12MDI) which is extended using 1, 4 butanediol (BD) followed by the dispersion of polymers in deionized water. Fourier Transform Infra-red spectroscopy (FTIR) is used to confirm the desired PU linkage. The probe tack graphs for tack analysis have not shown any plateau indicating absence of fibrillation. Two different values of glass transition temperature (Tg) have been observed for each dispersion using Differential Scanning Calorimetry(DSC). Storage modulus (E′) up to 3.97 MPa and (tanδ/E′) from 0.01–0.30 MPa−1 has been observed via Dynamic Mechanical Analysis (DMA). Introducing the HTPB has resulted in a decrease in the values of (tanδ/E′). No adhesion favorable parameters have been retrieved, indicating the molar variation a key factor in the development of anti-tack dispersions.
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8
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Asakura T, Ibe Y, Jono T, Matsuda H, Kuwabara N, Naito A. Structural investigations of polyurethane and
silk‐polyurethane
composite fiber studied by
13
C
solid‐state
NMR
spectroscopy. J Appl Polym Sci 2021. [DOI: 10.1002/app.51178] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Tetsuo Asakura
- Department of Biotechnology Tokyo University of Agriculture and Technology Koganei Tokyo Japan
| | - Yusuke Ibe
- Polyurethane Research Laboratory Tosoh Corporation Yokkaichi Mie Japan
| | - Takaki Jono
- Polyurethane Research Laboratory Tosoh Corporation Yokkaichi Mie Japan
| | - Hironori Matsuda
- Department of Biotechnology Tokyo University of Agriculture and Technology Koganei Tokyo Japan
| | - Nobuo Kuwabara
- Gunma Sericultural Technology Center Maebashi Gunma Japan
| | - Akira Naito
- Department of Biotechnology Tokyo University of Agriculture and Technology Koganei Tokyo Japan
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9
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Zhang C, Xia L, Deng B, Li C, Wang Y, Li R, Dai F, Liu X, Xu W. Fabrication of a High-Toughness Polyurethane/Fibroin Composite without Interfacial Treatment and Its Toughening Mechanism. ACS APPLIED MATERIALS & INTERFACES 2020; 12:25409-25418. [PMID: 32378401 DOI: 10.1021/acsami.0c03936] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Controlling the assembly modes of polymer chains and the interfacial interactions between the filler and polymer matrix is vital for improving the mechanical properties of the composites. Herein, we report an approach for significantly enhancing the toughness of unmodified silk fibroin (SF) powder from silk waste-incorporated polyurethane (PU) composite films via nonsolvent-induced phase separation (NIPS) using binary solvents. The incorporation of 50 wt % SF into the PU3 film (NIPS, binary solvents) resulted in a toughness value of 54.9 ± 0.4 MJ·m-3, exhibiting 1670.9 and 6000.0% increments compared to those of PU1-50% SF (NIPS, one solvent) and PU2-50% SF (solvent evaporation, one solvent), respectively. The toughness enhancement in the PU3-50% SF composite film benefits from the good interfacial interaction between SF and PU and the unique structure of the compacted "fishing net" with reinforced connections, which can transfer stress under loading effectively. Furthermore, the PU-SF composites with good mechanical properties may have potential applications in silklike fibers and biomimetic materials.
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Affiliation(s)
- Chunhua Zhang
- State Key Laboratory of New Textile Materials and Advanced Processing Technologies, Wuhan Textile University, Wuhan 430200, China
- State Key Laboratory of Silkworm Genome Biology, Ministry of Agriculture, Southwest University, Chongqing 400715, China
- Hubei Key Laboratory of Digital Textile Equipment, Wuhan Textile University, Wuhan 430200, China
| | - Liangjun Xia
- State Key Laboratory of New Textile Materials and Advanced Processing Technologies, Wuhan Textile University, Wuhan 430200, China
| | - Bo Deng
- State Key Laboratory of New Textile Materials and Advanced Processing Technologies, Wuhan Textile University, Wuhan 430200, China
- College of Material Science and Engineering, Wuhan Textile University, Wuhan 430200, China
| | - Chen Li
- State Key Laboratory of New Textile Materials and Advanced Processing Technologies, Wuhan Textile University, Wuhan 430200, China
| | - Yun Wang
- State Key Laboratory of New Textile Materials and Advanced Processing Technologies, Wuhan Textile University, Wuhan 430200, China
| | - Renhao Li
- State Key Laboratory of New Textile Materials and Advanced Processing Technologies, Wuhan Textile University, Wuhan 430200, China
| | - Fangyin Dai
- State Key Laboratory of Silkworm Genome Biology, Ministry of Agriculture, Southwest University, Chongqing 400715, China
| | - Xin Liu
- State Key Laboratory of New Textile Materials and Advanced Processing Technologies, Wuhan Textile University, Wuhan 430200, China
- College of Material Science and Engineering, Wuhan Textile University, Wuhan 430200, China
| | - Weilin Xu
- State Key Laboratory of New Textile Materials and Advanced Processing Technologies, Wuhan Textile University, Wuhan 430200, China
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10
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Wang Z, Yang H, Zhu Z. Study on the blends of silk fibroin and sodium alginate: Hydrogen bond formation, structure and properties. POLYMER 2019. [DOI: 10.1016/j.polymer.2019.01.004] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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11
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Rojas JEU, Gerbelli BB, Ribeiro AO, Nantes-Cardoso IL, Giuntini F, Alves WA. Silk fibroin hydrogels for potential applications in photodynamic therapy. Biopolymers 2018; 110:e23245. [PMID: 30548859 DOI: 10.1002/bip.23245] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2018] [Revised: 11/12/2018] [Accepted: 11/13/2018] [Indexed: 01/01/2023]
Abstract
In this study, we prepared translucid hydrogels with different concentrations of silk fibroin, extracted from raw silk fibers, and used them as a matrix to incorporate the photosensitizer 5-(4-aminophenyl)-10,15,20-tris-(4-sulphonatophenyl) porphyrin trisodium for application in photodynamic therapy (PDT). The hydrogels obtained were characterized by rheology, spectrophotometry, and scattering techniques to elucidate the factors involved in the formation of the hydrogel, and to characterize the behavior of silk fibroin (SF) after incorporating of the porphyrin to the matrix. The rheology results demonstrated that the SF hydrogels had a shear thinning behavior. In addition, we were able to verify that the structure of the material was able to be recovered over time after shear deformation. The encapsulation of porphyrins in hydrogels leads to the formation of self-assembled peptide nanostructures that prevent porphyrin aggregation, thereby greatly increasing the generation of singlet oxygen. Also, our findings suggest that porphyrin can diffuse out of the hydrogel and permeate the outer skin layers. This evidence suggests that SF hydrogels could be used as porphyrin encapsulation and as a drug carrier for the sustained release of photosensitizers for PDT.
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Affiliation(s)
- Jose Eduardo U Rojas
- Centro de Ciências Naturais e Humanas, Universidade Federal do ABC, Santo André, Brazil
| | - Barbara B Gerbelli
- Centro de Ciências Naturais e Humanas, Universidade Federal do ABC, Santo André, Brazil
| | - Anderson O Ribeiro
- Centro de Ciências Naturais e Humanas, Universidade Federal do ABC, Santo André, Brazil
| | | | - Francesca Giuntini
- School of Pharmacy and Biomolecular Sciences, Liverpool John Moores University, Liverpool, UK
| | - Wendel A Alves
- Centro de Ciências Naturais e Humanas, Universidade Federal do ABC, Santo André, Brazil
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12
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Xu W, Xiao M, Yuan L, Zhang J, Hou Z. Preparation, Physicochemical Properties and Hemocompatibility of Biodegradable Chitooligosaccharide-Based Polyurethane. Polymers (Basel) 2018; 10:E580. [PMID: 30966614 PMCID: PMC6404008 DOI: 10.3390/polym10060580] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2018] [Revised: 05/21/2018] [Accepted: 05/21/2018] [Indexed: 11/24/2022] Open
Abstract
The purpose of this study was to develop a process to achieve biodegradable chitooligosaccharide-based polyurethane (CPU) with improved hemocompatibility and mechanical properties. A series of CPUs with varying chitooligosaccharide (COS) content were prepared according to the conventional two-step method. First, the prepolymer was synthesized from poly(ε-caprolactone) (PCL) and uniform-size diurethane diisocyanates (HBH). Then, the prepolymer was chain-extended by COS in N,N-dimethylformamide (DMF) to obtain the weak-crosslinked CPU, and the corresponding films were obtained from the DMF solution by the solvent evaporation method. The uniform-size hard segments and slight crosslinking of CPU were beneficial for enhancing the mechanical properties, which were one of the essential requirements for long-term implant biomaterials. The chemical structure was characterized by FT-IR, and the influence of COS content in CPU on the physicochemical properties and hemocompatibility was extensively researched. The thermal stability studies indicated that the CPU films had lower initial decomposition temperature and higher maximum decomposition temperature than pure polyurethane (CPU-1.0) film. The ultimate stress, initial modulus, and surface hydrophilicity increased with the increment of COS content, while the strain at break and water absorption decreased, which was due to the increment of crosslinking density. The results of in vitro degradation signified that the degradation rate increased with the increasing content of COS in CPU, demonstrating that the degradation rate could be controlled by adjusting COS content. The surface hemocompatibility was examined by protein adsorption and platelet adhesion tests. It was found that the CPU films had improved resistance to protein adsorption and possessed good resistance to platelet adhesion. The slow degradation rate and good hemocompatibility of the CPUs showed great potential in blood-contacting devices. In addition, many active amino and hydroxyl groups contained in the structure of CPU could carry out further modification, which made it an excellent candidate for wide application in biomedical field.
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Affiliation(s)
- Weiwei Xu
- College of Chemistry, Chemical Engineering and Materials Science, Shandong Normal University, Jinan 250014, China.
| | - Minghui Xiao
- College of Chemistry, Chemical Engineering and Materials Science, Shandong Normal University, Jinan 250014, China.
| | - Litong Yuan
- College of Chemistry, Chemical Engineering and Materials Science, Shandong Normal University, Jinan 250014, China.
| | - Jun Zhang
- College of Chemistry, Chemical Engineering and Materials Science, Shandong Normal University, Jinan 250014, China.
| | - Zhaosheng Hou
- College of Chemistry, Chemical Engineering and Materials Science, Shandong Normal University, Jinan 250014, China.
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13
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Venkatesan H, Hu J, Chen J. Bioinspired Fabrication of Polyurethane/Regenerated Silk Fibroin Composite Fibres with Tubuliform Silk-Like Flat Stress⁻Strain Behaviour. Polymers (Basel) 2018; 10:E333. [PMID: 30966368 PMCID: PMC6414937 DOI: 10.3390/polym10030333] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2018] [Revised: 03/11/2018] [Accepted: 03/15/2018] [Indexed: 12/14/2022] Open
Abstract
Tubuliform silk is one of the seven different types of spider silks, which is well known for its unique tensile behaviour with Flat Tensile Stress⁻Strain (FTSS) curve. It is found that anisotropic microstructure of β-sheets is responsible for this property. In recent years, bioinspired approaches to engineer fibres supported by modern manufacturing systems have been attracting considerable interest. The present paper aims to investigate a strategy to biomimic the FTSS behaviour of tubuliform silk in synthetic polymer composite fibres by blending polyurethane (PU) and regenerated silk fibroin (RSF) at different ratios. Wet spinning of composite fibres results in the reconstruction of β-sheets in the synthetic fibre matrix. PU/RSF composite fibre at a ratio of 75/25 produce a tensile curve with FTSS characteristics. Secondary structural changes in RSF and interchain directions of β-sheets within the fibre are studied using Fourier Transform Infra-red (FTIR) spectroscopy and Transmission Electron Microscopy (TEM), respectively. Interestingly, results of TEM patterns confirm transverse anisotropic properties of RSF β-sheets. The composite fibres also display tuneable mechanical properties with respect to RSF contents.
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Affiliation(s)
- Harun Venkatesan
- Institute of Textiles & Clothing, The Hong Kong Polytechnic University, Hung Hom, Kowloon 999077, Hong Kong, China.
| | - Jinlian Hu
- Institute of Textiles & Clothing, The Hong Kong Polytechnic University, Hung Hom, Kowloon 999077, Hong Kong, China.
| | - Jianming Chen
- Institute of Textiles & Clothing, The Hong Kong Polytechnic University, Hung Hom, Kowloon 999077, Hong Kong, China.
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14
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Ren X, Mei Y, Lian P, Xie D, Yang Y, Wang Y, Wang Z. A Novel Application of Phosphorene as a Flame Retardant. Polymers (Basel) 2018; 10:E227. [PMID: 30966262 PMCID: PMC6415065 DOI: 10.3390/polym10030227] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2018] [Revised: 02/22/2018] [Accepted: 02/23/2018] [Indexed: 11/16/2022] Open
Abstract
Black phosphorene-waterborne polyurethane (BPWPU) composite polymer with 0.2 wt % of black phosphorene was synthesized. Scanning electron microscopy (SEM) was used to observe the morphology of phosphorene in polyurethane matrix, which indicated that the phosphorene distributes uniformly in the PU matrix. The flammability measurements were carried out to investigate the flame-resistant performances of phosphorene, which indicated that phosphorene could effectively restrict the degradation of the PU membrane. Compared by the pure WPU, the limiting oxygen index (LOI) of BPWPU increased by 2.6%, the heat flow determined by thermal analysis significantly decreased by 34.7% moreover, the peak heat release rate (PHRR) decreased by 10.3%.
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Affiliation(s)
- Xinlin Ren
- Faculty of Chemical Engineering, Kunming University of Science and Technology, Kunming 650500, Yunnan, China.
- The Higher Educational Key Laboratory for Phosphorus Chemical Engineering of Yunnan Province, Kunming University of Science and Technology, Kunming 650500, Yunnan, China.
| | - Yi Mei
- Faculty of Chemical Engineering, Kunming University of Science and Technology, Kunming 650500, Yunnan, China.
- The Higher Educational Key Laboratory for Phosphorus Chemical Engineering of Yunnan Province, Kunming University of Science and Technology, Kunming 650500, Yunnan, China.
| | - Peichao Lian
- Faculty of Chemical Engineering, Kunming University of Science and Technology, Kunming 650500, Yunnan, China.
- The Higher Educational Key Laboratory for Phosphorus Chemical Engineering of Yunnan Province, Kunming University of Science and Technology, Kunming 650500, Yunnan, China.
| | - Delong Xie
- Faculty of Chemical Engineering, Kunming University of Science and Technology, Kunming 650500, Yunnan, China.
- The Higher Educational Key Laboratory for Phosphorus Chemical Engineering of Yunnan Province, Kunming University of Science and Technology, Kunming 650500, Yunnan, China.
| | - Yunyan Yang
- Faculty of Chemical Engineering, Kunming University of Science and Technology, Kunming 650500, Yunnan, China.
- The Higher Educational Key Laboratory for Phosphorus Chemical Engineering of Yunnan Province, Kunming University of Science and Technology, Kunming 650500, Yunnan, China.
| | - Yongzhao Wang
- Faculty of Chemical Engineering, Kunming University of Science and Technology, Kunming 650500, Yunnan, China.
- The Higher Educational Key Laboratory for Phosphorus Chemical Engineering of Yunnan Province, Kunming University of Science and Technology, Kunming 650500, Yunnan, China.
| | - Zirui Wang
- Faculty of Chemical Engineering, Kunming University of Science and Technology, Kunming 650500, Yunnan, China.
- The Higher Educational Key Laboratory for Phosphorus Chemical Engineering of Yunnan Province, Kunming University of Science and Technology, Kunming 650500, Yunnan, China.
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15
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Shin EJ, Choi SM. Advances in Waterborne Polyurethane-Based Biomaterials for Biomedical Applications. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2018; 1077:251-283. [PMID: 30357693 DOI: 10.1007/978-981-13-0947-2_14] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Polyurethane (PU) is one of the most popular synthetic elastomers and widely employed in biomedical fields owing to the excellent biocompatibility and hemocompatibility known today. In addition, PU is simply prepared and its mechanical properties such as durability, elasticity, elastomer-like character, fatigue resistance, compliance or tolerance in the body during the healing, can be mediated by modifying the chemical structure. Furthermore, modification of bulk and surface by incorporating biomolecules such as anticoagulant s or biorecognizable groups, or hydrophilic/hydrophobic balance is possible through altering chemical groups for PU structure. Such modifications have been designed to improve the acceptance of implant. For these reason, conventional solventborne (solvent-based) PUs have established the standard for high performance systems, and extensively used in medical devices such as dressings, tubing, antibacterial membrane , catheters to total artificial heart and blood contacting materials, etc. However, waterborne polyurethane (WPU) has been developed to improve the process of dissolving PU materials using toxic organic solvents, in which water is used as a dispersing solvent. The prepared WPU materials have many advantages, briefly (1) zero or very low levels of organic solvents, namely environmental-friendly (2) non-toxic, due to absence of isocyanate residues, and (3) good applicability caused by extensive structure/property diversity as well as an environment-friendly fabrication method resulting in increasing applicability. Therefore, WPUs are being in the spotlight as biomaterials used for biomedical applications . The purpose of this review is to introduce an environmental- friendly synthesis of WPU and consider the manufacturing process and application of WPU and/or WPU based nanocomposites as the viewpoint of biomaterials.
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Affiliation(s)
- Eun Joo Shin
- Department of Organic Materials and Polymer Engineering, Dong-A University, Busan, South Korea
| | - Soon Mo Choi
- Regional Research Institute for Fiber & Fashion Materials, Yeungnam University, Gyeongsan, South Korea.
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Shefa AA, Amirian J, Kang HJ, Bae SH, Jung HI, Choi HJ, Lee SY, Lee BT. In vitro and in vivo evaluation of effectiveness of a novel TEMPO-oxidized cellulose nanofiber-silk fibroin scaffold in wound healing. Carbohydr Polym 2017; 177:284-296. [PMID: 28962770 DOI: 10.1016/j.carbpol.2017.08.130] [Citation(s) in RCA: 70] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2017] [Revised: 08/24/2017] [Accepted: 08/25/2017] [Indexed: 12/19/2022]
Abstract
In this study, a novel TEMPO-oxidized cellulose nanofiber (TOCN)-silk fibroin scaffold was prepared using a cost effective freeze drying method. Fundamental physical characterizations were carried out by scanning electron microscopy (SEM), pore diameter determination, FT-IR. PBS uptake behavior of the scaffold showed that, silk fibroin can enhance the swelling capacity of TOCN. L929 primary fibroblast cell was selected for in vitro studies, which showed that the scaffolds facilitated growth of cells. In vivo evaluation of TOCN, TOCN-silk fibroin composites was examined using critical sized rat skin excisional model for one and two weeks. The results of rat wound model revealed that, compared to only TOCN scaffold, TOCN-silk fibroin scaffold successfully promoted wound healing by the expression of wound healing markers. TOCN-silk fibroin 2% has the fastest wound healing capacity. Thus, it appears that TOCN-silk fibroin composite scaffolds can be useful as wound healing material in clinical applications.
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Affiliation(s)
- Anha Afrin Shefa
- Department of Regenerative Medicine, College of Medicine, Soonchunhyang University 366-1, Ssangyong-dong, Cheonan-City, ChungCheongNam-Do 330-090, Republic of Korea
| | - Jhaleh Amirian
- Institute of Tissue Regeneration, College of Medicine, Soonchunhyang University 366-1, Ssangyong-dong, Cheonan-City, ChungCheongNam-Do 330-090, Republic of Korea
| | - Hoe Jin Kang
- Institute of Tissue Regeneration, College of Medicine, Soonchunhyang University 366-1, Ssangyong-dong, Cheonan-City, ChungCheongNam-Do 330-090, Republic of Korea
| | - Sang Ho Bae
- Department of Surgery, College of Medicine, Soonchunhyang University Hospital, Cheonan-City, ChungCheongNam-Do 330-090, Republic of Korea
| | - Hae-Il Jung
- Department of Surgery, College of Medicine, Soonchunhyang University Hospital, Cheonan-City, ChungCheongNam-Do 330-090, Republic of Korea
| | - Hwan-Jun Choi
- Department of Plastic and Reconstructive Surgery, College of Medicine, Soonchunhyang University Hospital, Cheonan-City, ChungCheongNam-Do 330-090, Republic of Korea
| | - Sun Young Lee
- Division of Environmental Material Engineering, Department of Forest Products, Korea Forest Research Institute, Republic of Korea
| | - Byong-Taek Lee
- Department of Regenerative Medicine, College of Medicine, Soonchunhyang University 366-1, Ssangyong-dong, Cheonan-City, ChungCheongNam-Do 330-090, Republic of Korea; Institute of Tissue Regeneration, College of Medicine, Soonchunhyang University 366-1, Ssangyong-dong, Cheonan-City, ChungCheongNam-Do 330-090, Republic of Korea.
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