Polymers
·
2023
·Vol. 15
·期 5
·1270
·
IF 5
Haiyan Mao,Qun Zhang,Ling Lin,Xuemei He,Lili Wang
Polyurethanes with self-healing and reprocessing capabilities are promising in eco-friendly applications. Here, a self-healable and recyclable zwitterionic polyurethane (ZPU) was developed by introducing ionic bonds between protonated ammonium groups and sulfonic acid moieties. The structure of the synthesized ZPU was characterized by FTIR and XPS. The thermal, mechanical, self-healing and recyclable properties of ZPU were also investigated in detail. Compared with cationic polyurethane (CPU), ZPU shows similar thermal stability. The physical cross-linking network formed between zwitterion groups can dissipate strain energy as a weak dynamic bond, endowing ZPU with outstanding mechanical and elastic recovery properties, including the high tensile strength of 7.38 MPa, high elongation at a break of 980%, and fast elastic recovery ability. Additionally, ZPU exhibits a healing efficiency of over 93% at 50 °C for 1.5 h as a result of the dynamic reconstruction of reversible ionic bonds. Furthermore, ZPU can be well reprocessed by solution casting and hot-pressing with a recovery efficiency above 88%. The excellent mechanical properties, fast repairing capability, and good recyclability not only enable polyurethane with a promising application in protective coatings for textiles and paints but also make it a superior candidate as stretchable substrates for wearable electronic devices and strain sensors.Keywords:zwitterionic polyurethane;elasticity;self-healing;reprocessing
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
RSC Advances
·
2017
·Vol. 7
·期 44
·27522-27529
·
IF 3.108
Chunhua Wang,Chunfeng Ma,Changdao Mu,Wei Lin
Antimicrobial coating is of great important in leather finishing. Herein, we report a newly synthesized polyurethane with zwitterionic sulfobetaine side groups and evaluate their performance in the antifouling leather coatings. The microstructure of the synthesized zwitterionic polyurethane (iNPU) films has been examined by Fourier transform infrared (FTIR), X-ray diffraction (XRD) and atomic force microscopy (AFM) in order to understand how it influences the mechanical and surface properties. Our results show that introduction of zwitterionic groups into polyurethane can markedly increase the degree of micro-phase separation between the hard and soft segments of the PU chains since the incorporated zwitterionic group leads to more hydrogen bonding and polar interactions, making the hard components to be more thermodynamically incompatible with the soft segments. As the content of the incorporated zwitterionic content increases, the ordered structure in PU chains is reduced, and the micro-phase separation degree is increased. Therefore, the tensile strength and elongation at break of the iNPU films are significantly improved. Dynamic mechanical thermal analysis (DMTA) results further indicate that the Tg of the iNPU coatings decreases, and the deformability greatly increases at a higher content of zwitterionic group. Water contact angle (WCA) measurements reveal the improved surface wetting property due to the presence of zwitterionic group. The antibacterial testing shows that the iNPU coated leather surfaces exhibit reasonably good anti-mold adhesion performance, although the iNPU films do not show apparent contact-killing antibacterial property against E. coli and S. aureus. The present zwitterionic polyurethane is thus can be potentially used as antimicrobial adhesive leather coating materials.
研究领域:
材料科学
·
微生物学
·
表面化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Dandan Hu,Zhipeng Zhang,Guoliang Zhang,Guangzhao Zhang,Chunfeng Ma
Solar-driven water evaporation has attracted increasing attention as an environmentally friendly method of water purification/desalination. However, the presence of biofouling and oil-fouling agents in natural water induces channel plugging and significantly decreases its efficiency. In this study, a self-generating zwitterionic polyurethane foam (ZPF) is fabricated by grafting a silylated hydrolysis-induced zwitterionic telomer (Si-HIZ), further spraying TiN/PDMS on the top as a solar evaporation device. The TiN/PDMS serves as a photothermal converter, and the ZPF serves as a water pump. The foam exhibits excellent evaporation performance, with a water evaporation rate of 1.51 kg m–2 h–1 and a photothermal conversion efficiency of 98.56%. When used underwater, the foam forms a hydration layer that effectively inhibits biofilm formation in the channels, allowing solar-driven water evaporation to occur normally after cocultivating in a bacterial suspension (Escherichia coli, Staphylococcus aureus, and Pseudomonas sp.) for 4 days. Moreover, it exhibits good anti-oil-fouling performance (underwater–oil contact angle = 151°) and resists 20 wt % NaCl solutions in solar-driven water evaporation. These results demonstrate that hydrolysis-induced zwitterionic polymers are promising materials for designing water purification/desalination devices, introducing new avenues for applications in complex environments.
研究领域:
材料科学
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环境科学
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能源科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
RSC Advances
·
2017
·Vol. 7
·期 50
·31525-31534
·
IF 3.108
Hao Wen,Shaojun Chen,Zaochuan Ge,Haitao Zhuo,Jinlong Ling,Qiao Liu
This paper reports a novel humidity-responsive self-healing material based on zwitterionic polyurethanes. The material was synthesized from N,N-bis(2-hydroxylethyl) isonicotinamide (BINA), hexamethylene diisocyanate (HDI) and 1,3-propanesultone (PS). The self-healing of its structure, its mechanical properties and shape memory properties were carefully investigated. Results demonstrate that self-healing zwitterionic polyurethanes contain pyridine type sulfobetaines and that strong electrostatic interactions are formed between zwitterions acting as physical crosslinkers. The aggregation of zwitterions strongly influences the phase transition behavior of polyurethane. Bulk polyurethane shows a phase-separated structure with an amorphous soft phase. The damaged zwitterionic polyurethane structure can self-heal several times in the presence of moisture without any additive or external energy. As the proportion of zwitterions increases, the self-healing efficiency increases. The self-healing efficiency results are higher when the relative humidity is increased. The self-healing mechanism is ascribed to the improved ionic mobility upon hydration and to electrostatic forces which occur during drying. Furthermore, pyridine based zwitterionic polyurethanes also show good self-healing of their shape memory properties. Self-healed polyurethanes show both a good shape fixity and recovery. This work paves the way to develop stimulus-responsive self-healing materials for renewable shape memory applications.
研究领域:
材料科学
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高分子化学
✓ 已验证
产品关联
DOI
高影响因子
POLYMER
·
2018
·
IF 3.483
Haitao Zhuo,Hao Wen,Guanlun Liu,Heng Chen,Shaojun Chen
There have been great developments in shape memory polymers in recent years. However, the permanent shape was usually predetermined and could not be changed during the shape memory process. This work reports a facile method for permanent shape reconfiguration of shape memory polymers using a water-soaking treatment. The impact of water molecules on the structure, morphology, and properties of zwitterionic polyurethanes (ZPUs) was carefully investigated. FT-IR, DSC , TGA , and DMA analysis revealed that polymer chains of ZPU can be easily activated by absorbing water molecules and was solidified again by removal of water molecules. Direct water-soaking treatment can eliminate previous shape recovery capability and then be used to reconfigure a new permanent shape for a new thermally induced shape memory process. Thus, this work provides an alternative approach for manufacturing complicated devices at room temperature and for easily regulating the thermally induced shape memory effect.
研究领域:
材料科学
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高分子化学
✓ 已验证
产品关联
DOI
高影响因子
Polymer Chemistry
·
2016
·Vol. 7
·期 37
·5773-5782
·
IF 5.687
Shaojun Chen,Zhankui Mei,Huanhuan Ren,Haitao Zhuo,Jianhong Liu,Zaochuan Ge
This paper reports a new type of zwitterionic polyurethane containing pyridine type zwitterionic segments for shape memory materials. The pyridine type zwitterionic shape memory polyurethanes (SMPUs) were synthesized using polyurethane polymerization from N,N-bis(2-hydroxylethethyl)isonicotinamide (BINA), hexamethylene diisocyanate (HDI), diphenylmethane diisocyanate (MDI) and 1,4-butanediol (BDO), followed by a ring-opening reaction with 1,3-propanesultone (PS). The structure and properties of the pyridine-type zwitterionic SMPUs (PyZPUs) were investigated systematically. The results demonstrate that the PyZPUs form phase-separation structures composed of a hard phase and an amorphous soft phase with a broad glass transition. The shape memory tests show that the PyZPUs have thermal-induced dual-shape memory effects (SMEs), triple-SMEs and quadruple-SMEs and also moisture-sensitive SMEs. Comparatively, the samples with PS/BINA molar ratios of 0.6–0.8 have more than 86% shape recovery and more than 95% shape fixity with a heat stimulus. Under moisture conditions, these samples also show the quickest moisture-sensitive strain recovery, up to 86%. Moreover, the PyZPUs show good biocompatibility when the content of pyridine type zwitterionic segments is beyond 21 wt%. Thus, the PyZPUs are expected to have many promising applications in smart biomedical fields.
研究领域:
生物材料学
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高分子科学
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智能响应材料
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组织工程
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转化医学
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药物递送系统
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表面功能化
✓ 已验证
DOI
高影响因子
POLYMER
·
2018
·
IF 3.483
Haitao Zhuo,Zhankui Mei,Heng Chen,Shaojun Chen
In this contribution, shape memory polymers (SMPs) of chemically-crosslinked zwitterionic polyurethanes (CZPUs) were fabricated by crosslinking of the N,N-bis(2-hydroxyethyl) isonicotinamide (BINA)/hexamethylene diisocyanate (HDI) polyurethanes system by using pentaerythritol (PER), followed by zwitterionization with 1, 3-propanesultone (PS). As the zwitterionic units increased, it was found that the glass transition of hard phase in CZPUs remains constant while that of soft phase shifted at lower temperature, and a broad glass transition was obtained. The broad glass transition enables CZPUs to display triple, quadruple, and quintuple shape memory behaviours. Meanwhile, due to the chemically-crosslinked structure, the CZPUs exhibited an excellent shape fixation and recovery. Furthermore, the CZPU also exhibited good moisture-induced shape memory effect (SME) with a fast and high shape recovery observed below 70% RH and at 37 °C. The excellent thermally-induced multi-shape memory effect and moisture-induced shape memory effect enable CZPUs to be applied as smart materials for many applications among them the biomedical fields .
研究领域:
生物材料学
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高分子科学
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智能响应材料
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组织工程
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药物递送系统
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再生医学
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生物医学工程
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Lingfeng Hu,Xueyuan Zhai,Jinge Li,Xiaoniu Yang,Mingbo Ruan
In the context of meniscus reconstruction in knee joints, current bulk biomaterials fail to meet the clinical demands for both excellent mechanical strength and low coefficient of friction. In this research, zwitterionic polyurethanes (PUs) with varying sulfobetaine (SB) groups were synthesized as the potential materials for artificial meniscus to investigate the relationship between the structures of SB groups and the performances of PUs. Under the saturation condition of 3 mg/mL hyaluronic acid aqueous solution, PU with long-alkyl chains and SB groups (PU-hSB4) exhibited a good tensile modulus (111.5 MPa) because the hydrophobic interaction of carbon chains was able to maintain the ordered aggregations of hard segment domains. Interestingly, hydrophobic chains in the molecular chain could also improve the tribological performance of PU-hSB4 instead of resulting from the surface roughness of samples, the components of lubricants, and the counterface of samples. A thicker and relatively stable hydration layer of noncrystal water was formed on the surface of PU-hSB4, which exhibited superior resistance to external forces compared to other PUs. Even if the hydration layer was damaged, PU-hSB4 was able to resist the compression of cartilage due to its high surface modulus, thus maintaining a similar and stable coefficient of friction (0.15–0.16) to native meniscus (0.18) and excellent wear resistance. In addition, the low cytotoxicity of PU-hSB4 further demonstrated its great potential to be applied in artificial meniscus instead.
研究领域:
材料科学
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生物医学工程
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组织工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
REACTIVE & FUNCTIONAL POLYMERS
·
2020
·
IF 3.333
Naveed Athir,Sayyed Asim Ali Shah,Farooq Khurum Shehzad,Jue Cheng,Junying Zhang,Ling Shi
Zwitterion polyurethanes (ZPU) are used for non-fouling and antimicrobial surfaces but their sensitive nature under ultra-violet (UV) radiations limits the requirements of engineering materials . Herein, ZPU is successfully synthesized and then prepared different TiO 2 /ZPU composites, aiming to increase the service life of ZPU and to form active film for food packaging applications. The thermo-mechanical results revealed that the 4% TiO 2 /ZPU sample exhibits better performance, as evidenced through tensile testing and surface morphology analysis. The UV–Vis spectra results indicated that the rutile TiO 2 nanoparticles can enhance the UV absorption and visible light reflectance, decreasing photoaging properties of composites thereby prolonging its shelf life. Moreover, scanning electron microscopy ( SEM) observation after 5 h irradiation of UV light confirmed the photostability of TiO 2 /ZPU composite film . Further, the antioxidant ability of ZPU is increased from 51% to 71% with TiO 2 . The results of antimicrobial activity of TiO 2 /ZPU demonstrate strong bacterial growth inhibition against E. coli that regards its suitability for food and other packaging applications. Besides, the food preservation ability is monitored by visual changes of tomato fruit. In essence, we anticipate that the TiO 2 /ZPU composite films possessed all expected features to be considered as photostable material for food packaging.
研究领域:
材料科学
·
高分子科学
·
食品科学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）