ACS Applied Polymer Materials
·
2023
·
IF 5
Yinghu Song,Jialiang Li,Guojun Song,Lina Zhang,Zhen Liu,Xianhui Jing,Fei Luo,Yingda Zhang,Yuhan Zhang,Xiaoru Li
It is still challenging and attractive to prepare polyurethane (PU) materials with excellent self-healing ability while improving their mechanical properties and high ductility. Here, a multifunctional linear PU supramolecular elastomer was successfully prepared by introducing a cross-linking network of quadruple hydrogen bonds and thermo-reversible Diels–Alder bonds and rigid ring structure to the linear backbone. The results exhibited that the obtained PU elastomer displayed a high tensile strength (6.30 MPa), elongation (1957.84%), toughness (84.48 MJ/m3), and excellent repair efficiency (93.33%). The quadruple hydrogen bonds from 5-(2-hydroxyethyl)-6-methyl-2-aminouracil and thermo-reversible Diels–Alder bonds from the conjugated reaction of 4,4′-bismaleimide diphenylmethane with furfuryl alcohol, due to its synergetic dual reversible bonds, formed the PU elastomer that possessed excellent mechanical, self-healing, shape recovery, and reprocessing properties. The prepared multifunctional PU can be used as a substrate for flexible conductive materials or as conductive composite material with conductive materials, which can self-repair many times when the surface is damaged, can be recycled, and greatly improve the service life of the material. Therefore, the prepared multifunctional high-performance self-healing PU materials have potential applications in several fields.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2017
·Vol. 135
·期 13
·46032
·
IF 1.86
Ming Zhang,Mingqing Chen,Zhongbin Ni
We investigated the rheological behaviors of diglycidyl ether of bisphenol A (epoxy resin) composite pastes with fumed SiO 2 , biscarbamates, and tricarbamates with the same terminal alkyl chains of C 16 , respectively. The rheological measurement results show that the rheological responses of both carbamates in the epoxy composite pastes were stronger than that of fumed silica at the same concentrations, especially at low concentrations, and the rheological behaviors of the epoxy composites with them were thermally reversible and concentration dependent. IR, thermal, differential scanning calorimetry, and polarized microscopic analyses demonstrated that their different excellent rheological responses in epoxy composite pastes came from their different self-assemblies in the epoxy matrix, which were caused by the different intermolecular interactions, mainly including hydrogen-bonding and van de Waals interactions, and the intermolecular interactions for carbamates were closely related to their molecular structures. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018 , 135 , 46032.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
FOOD HYDROCOLLOIDS
·
2023
·
IF 10.7
Shuhan Feng,Jianyong Yi,Youchuan Ma,Jinfeng Bi
Gelation of amidated pectin in the acid environment with the absence of calcium has been found, but the mechanism and gel properties are still not fully understood, especially the role of amide groups. In this study, a series of pectins with different degrees of amidation (DA) were prepared by ammonia reaction, and their structural characteristics including neutral sugar contents, molecular weight contribution, and molecular morphology were fully identified. Acid-induced hydrogels with various DA were then obtained to investigate the impact of amino groups on pectin gelation. Results showed that the higher the DA, the faster the gelation process, and the more stable the gel network. Dynamic rheological and pH stability tests confirmed the essential roles of low pH value (<3.5) and high DA (>49.76%) on the amidated pectin gelation without calcium. Hydrogen bonds were identified as the main interaction for the amidated gel mechanism and enabled the thermo-reversible properties of amidated gels. High content of amide groups allowed the formation of a denser gel network structure with greater mechanical strength, stronger thermo-reversibility, and higher pH stability.
研究领域:
食品科学
·
高分子化学
·
生物材料
✓ 已验证
产品关联
DOI
高影响因子
POLYMER SCIENCE SERIES B
·
2023
·
IF 1.2
Zhonglin Cao,Xiaoling Zuo
Abstract To increase the range of applications of bio-based polymer materials by attributing them self-healing ability is an efficacious way. It is an effective method to use Diels-Alder reaction for self-healing. However, self-healing materials synthesized by multifunctional monomers with Diels-Alder groups possess a low use temperature due to reversibility of DA bonds. In this study, the branched poly(furfuryl methacrylate) was synthesized from furfuryl alcohol, which is a biobased raw material prepared from crops. Using poly(furfuryl methacrylate) and bismaleimide, biobased self-healing polymeric materials were synthesized successfully based on the Diels-Alder reversible reaction. The Diels-Alder direct and reverse reactions occurred upon heating, resulting in self-healing of cracks on the polymer coatings. The thermal stability and use temperature of materials were also improved. All results demonstrated that synthesized materials possessed the characteristics of thermo-reversibility and self-healing and held great potential for self-healing coating applications.
研究领域:
材料科学
·
化学工程
·
生物技术
✓ 已验证
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2024
·
IF 6.5
Jinsong Wang,Farzad Seidi,Xiaotong Shi,Chengcheng Li,Yang Huang,Huining Xiao
In the current research, we explored the fabrication of thermo-reversible polymer networks made of bio-based materials to address the growing need for greener and more sustainable polymer coating . Herein, we developed thermally self-healing lignin-based coatings with strong anticorrosion performances through Diels-Alder crosslinking strategy. Accordingly, organosolv lignin was first functionalized by furan moieties and then used for thermally crosslinking by 4,4′-bismaleimidodiphenylmethane (BMI) after spin casting on the surface of steel sheets. Under the optimum conditions, the obtained coating could generate smooth and defect free layers. A thin layer (18 μm) of this coating could increase the E corr from −481 mV (for bare steel) to +142 mV and reduced the corrosion rate (CR) over 3300 times. Importantly, the thermo-reversibility of the network endows excellent self-healing ability to the coating. Indeed, lignin self-healing coatings based on thermo-reversible Diels-Alder reaction provides a creative strategy for bio-based materials applied in anticorrosion applications with high-performance.
研究领域:
材料科学
·
化学工程
·
可持续发展
✓ 已验证
产品关联
DOI
高影响因子
POLYMER ENGINEERING AND SCIENCE
·
2019
·Vol. 59
·期 8
·1603-1610
·
IF 1.92
Libang Feng,Hanwen Zhao,Xia He,Yanhua Zhao,Liuxiaohui Gou,Yanping Wang
Cracks may generate in epoxy resins, which can affect the comprehensive property and shorten service life. The problem is expected to be resolved by endowing epoxy resin with self-healing performance. Herein, a new kind of self-healing epoxy resin containing both Diels–Alder (DA) bonds and nitrile butadiene rubber (NBR) has been developed. The self-healing performance and mechanical properties of as-prepared epoxy resins are investigated by qualitative observation and quantitative measuring. Results reveal that the as-prepared epoxy resins exhibit excellent self-healing performance and multiple repair ability, and the self-healing behavior is based on dual actions of thermal reversibility of DA reaction and thermal movement of molecular chains. Furthermore, the thermoreversible DA bonds contribute much to the recovery of mechanical property, while the incorporated thermoplastic NBR accelerates the whole healing process. The self-healing efficiency of epoxy resins can be enhanced markedly by introducing thermoplastic NBR. In addition, the self-healing epoxy resins also exhibit outstanding reprocessing performance, which makes it possible of recycling waste epoxy resin. POLYM. ENG. SCI., 59:1603–1610 2019. © 2019 Society of Plastics Engineers
研究领域:
材料科学
·
高分子化学
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 77
·73140-73147
·
IF 3.289
Zhiming Gou,Yujing Zuo,Shengyu Feng
A simpler approach is developed to obtain recyclable self-healing polysiloxane networks based on the thiol-ene reaction and Diels–Alder (DA) reaction. Tetramethyltetravinylcyclotetrasiloxane (D4Vi) was first modified with furan via a thiol-ene reaction, giving furan-functionalized cyclotetrasiloxane (D1). D1 then reacted with bismaleimide to form thermally dynamic reversible crosslinking linkages via a Diels–Alder (DA) reaction. Thus, crosslinked networks (CNs) were synthesized and their depolymerization through the retro-DA reactions was thoroughly studied. The kinetics of the DA reaction was studied by 1H-NMR spectroscopic analysis of the model compounds. Results indicated that the DA reaction performs better at 60 °C and follows second-order kinetics. The CNs show strong photoluminescence when irradiated by UV light and exhibited potential application in recyclable adhesives for glass.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
POLYMER ENGINEERING AND SCIENCE
·
2021
·Vol. 61
·期 9
·2257-2266
·
IF 2.428
Yunpeng Zhang,Jiaofeng Ye,Dongan Qu,Haitao Wang,Changsheng Chai,Libang Feng
Micro-damage in materials could be repaired by endowing materials with self-healing performance. Herein, an epoxy resin with excellent self-healing performance grounded on thermo-reversible Diels–Alder dynamic chemical reaction was developed. Results showed that the bending strength and adhesive behavior of epoxy resin were influenced dramatically upon treatment with various temperatures. More importantly, damages created in epoxy resin could be repaired completely after suitable heat treatments. What is more, the healed epoxy resin exhibited much higher bending strength and adhesive performance than the pristine one did. The materials could be damaged and then repaired repeatedly. Meanwhile, the as-prepared self-healing epoxy resin exhibited excellent thermal reversibility and controllable adhesion. The thermo-adjusted self-healing performance endowed epoxy resin with recyclable and reusable performance. Therefore, the research made it possible of recycling waste epoxy resins.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
BIOMACROMOLECULES
·
2021
·
IF 6.988
Dan Zhao,Dong Li,Fenli Quan,Yuhao Zhou,Zhen Zhang,Xuesi Chen,Chaoliang He
Thermoreversible hydrogels are attractive materials for biomedical applications, but their applications are still limited by nonbiodegradability and/or slow temperature-dependent gel-to-sol transition rates. In this research, we prepared a range of amphiphilic diblock, triblock, and four-armed star block copolymers composed of poly(ethylene glycol) (PEG) and poly(γ-(2-(2-ethoxyethoxy)ethyl)-l-glutamate) (P(EEO2LG)) segments, which can form rapidly thermoreversible hydrogels at physiological temperature. Intriguingly, the obtained hydrogels can transform from gel to sol within 10–70 s in response to the temperature decrease from 37 to 0 °C. The thermosensitive sol–gel–sol transitions are markedly faster than previously reported thermoreversible PEG-poly(l-glutamate) derivative hydrogels with subtle differences in the side groups and a widely studied poly(d,l-lactide-co-glycolide)-b-PEG-b-poly(d,l-lactide-co-glycolide) (PLGA-PEG-PLGA) hydrogel that required a much longer time of 40∼150 min. Further investigation of the relationship between the hydrogel property and polymer structure is performed, and the self-assembly mechanisms of different copolymers are proposed. Cytotoxicity assays and subcutaneous degradation experiments reveal that the PEG/P(EEO2LG) block copolymers are biocompatible and biodegradable. The polypeptide hydrogel can therefore be used as a three-dimensional platform for facile cell culture and collection by regulating the temperature.
研究领域:
生物材料学
·
生物医药工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
POLYMER DEGRADATION AND STABILITY
·
2022
·
IF 5.204
Rui Zhang,Lishuai Zong,Jinyan Wang,Xigao Jian
Poly(aryl ether ketone)s (PAEKs) exhibit excellent thermal and mechanical properties, but their poor processability limit further application. In this regard, a bio-based cross-linking high-performance PAEK was prepared through the Diels-Alder (DA) reaction between furyl-functionalized PAEK and N,N'-4,4′-diphenylmethylene-bismaleimide (BMI). First, two novel fully bio-based furyl-functionalized bisphenols, BPF-M and BPF-AM, were prepared by simple one-step aromatic substitution of two bio-based o‑methoxy-phenols and furfural. Orbital interaction of the DA reactions between the two bisphenols and BMI was investigated with B3LYP density functional method, and the quantitative study was performed with DSC and 1 H NMR. Next, a series of PAEKs (LINKERs) with high biomass content of 58.7–72.8% were prepared with BPF-M, 2,5-bis(4-flurobenzoly)furan (BFBF) and 6-(4hydroxy-3-methoxyphenyl)pyridazin-3(2H)-one (GSPZ). LINKERs had excellent thermal properties (T g = 182–212 °C, T d10% = 415–452 °C), processing properties (lowest rheology viscosities = 178–3217 Pa·s) and solution processability. Finally, PAEK themo-reversible gel and cross-linking film were prepared through the DA reaction between LINKER-73 and BMI. The film had solvent resistance and high tensile strength, which increased from 75 MPa to 101 MPa compared to the uncrosslinked one. Besides, LINKERs gained the ability of reprocessing and recycled via DA and r-DA reactions. We expect to provide important theoretical and practical references on bio-based furyl-functionalized bisphenols and high-performance PAEKs.
研究领域:
材料科学
·
有机化学
✓ 已验证
DOI
高影响因子
POLYMER
·
2017
·
IF 3.684
Libang Feng,Zhengyang Yu,Yaohui Bian,Junshan Lu,Xueting Shi,Changsheng Chai
Cracks generated in materials affect comprehensive performance and shorten service life of materials. The problem is expected to be resolved by endowing materials with self-healing property. Herein, a new thermoplastic polyurethane with excellent self-healing performance (PU-DA) has been developed, while the self-healing behavior is investigated by qualitative observation and quantitative measuring comparatively. Results reveal that PU-DA exhibits excellent thermal reversibility due to incorporated Diels-Alder (DA) bonds, and cracks in polyurethane films can be repaired by dual actions of thermo-reversible DA reaction and thermal movement of molecular chains . DA bond and its thermal reversibility contribute much to the recovery of the mechanical property while the thermal movement effect of molecular chains acts as an auxiliary recovering force which accelerates the whole healing process. The self-healing behavior of PU-DAs from diverse soft segments and different -NCO/-OH values further confirms that the excellent self-healing performance is grounded on combined actions indeed. Additionally, the self-healing polyurethane presents outstanding reprocessing performance, and which makes it possible of recycling waste polyurethanes. This study enables the re-demonstration of general points about DA thermal reversibility already known, as well as presentation of link between self-healing capability and thermal reversibility along with thermal movement.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
Polymer Chemistry
·
2022
·Vol. 13
·期 10
·1376-1386
·
IF 5.364
Zhanbin Feng,Jiafang Guo,Xiaohan Cao,Guofei Feng,Zheqi Chen,Xing-Hong Zhang
The key to achieving homogenous dielectric elastomers (DEs) with broader application prospects is obtaining a high dielectric constant (ε′), excellent mechanical properties, and self-healing abilities. Herein, we report thermo-reversible furfuryl poly(thioether)-b-polysiloxane-b-furfuryl poly(thioether) triblock copolymer based homogenous DEs with tunable dielectric and mechanical performances. The triblock copolymer (PSiFGE) is synthesized via the silicon alkoxide catalyzed ring-opening polymerization (ROP) of furfuryl glycidyl ether (FGE) and carbonyl sulfide (COS). The Diels–Alder (DA) reaction is then realized after the incorporation of bismaleimide (BMI), and the thermo-reversible homogenous DE (PSiFGE-BMI) is obtained. The introduction of DA bonds endows PSiFGE-BMI with a thermo-reversible crosslinking network and an adjustable crosslinking degree. The resultant material exhibits alterable mechanical strength (varying from 0.16 MPa to 11.2 MPa) and a variable elastic modulus (Y, from 0.6 MPa to about 79 MPa). Of significance is that PSiFGE-BMI possesses a high ε′ (up to 7.6), high electromechanical sensitivity (β, up to 11.8 MPa−1), and a high actuation area strain (9.3%@9.8 V μm−1). In addition, the homogenous DE exhibits excellent shape memory and shape reconfiguration behavior with a fixing ratio (Rf) and recovery ratio (Rr) of above 90%. This work provides a new strategy to prepare homogenous DEs with improved electromechanical performance and shape memory behavior, leading to promising application prospects in actuated devices.
研究领域:
材料科学
·
高分子化学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）