POLYMER BULLETIN
·
2017
·Vol. 74
·期 9
·3907-3922
·
IF 1.43
Wei Yanyan,Du Xiucai,Ma Xiaoyue,Zhao Kaifeng,Zhang Shiyu,Bai Yapeng
Highly cross-linked polyurethanes based on Diels–Alder (DA) reaction have high hardness but poor toughness. A modified polyurethane with three-furyl diol (TF) was synthesized innovatively to improve its mechanical properties. Three-furyl diol (TF) and hydroxyl terminated polyurethane IDI-TF were synthesized first. Then the reaction of IDI-TF with xylene bismaleimide (BMI) generates cross-linked polyurethane ITB-PU (its soft segment content is 11.5%). Finally, the properties of the polyurethane ITB-PU were characterized by a series of methods. It can be observed that the DA reaction occurred at 50.33 °C, the r-DA reaction at 69.55 °C. When heated at 80 °C for 6 h, the self-healing efficiency of the ITB-PU was 43.91% known from the tensile test, and cracks on it virtually disappeared seen from polarizing microscope (POM). When heat was preserved for 12 h, the self-healing efficiency can reach 80.02%.
研究领域:
材料科学
·
化学工程
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DOI
高影响因子
Journal of Water Process Engineering
·
2024
·
IF 6.3
Yun-Hao Xia,Ying-Ying Gui,Jia-Hua Zhou,Gui-E Chen,Zhen-Liang Xu
Poly (vinylidene fluoride) (PVDF) membranes are often corroded, leading to structural defects in the treatment of alkaline textile wastewater, greatly reducing separation efficiency. Herein, PVDF membranes were surface-modified through coating and self-assembly methods. Novel adhesives (ad-LNPs) were prepared by heat-releasing endo -crosslinked 2,2-Bis (4-glycidyloxyphenyl) propane (BADE) in lignin (LNP). ad-LNPs coatings provided stable adhesion properties to the PVDF membrane surface and exhibited pH-switchable surface charge with excellent alkali resistance. Subsequently, benzene amine monomers and water-soluble 2-acrylamide-2-methyl-1-propanesulfonic acid (AMPS) are introduced to form a polymer network (AMPS-PANI) layer through self-assembly. The results showed that the membrane permeability and selectivity reached the optimal equilibrium point when the aniline monomers self-polymerization time was 40 min (temperature: 5–10 °C). High dye retention (MB:99.8 %, RhB:99.5 %, CR:98 %, MO:96.2 %) at high purity water flux (172 L·m −2 ·h −1 ). Meanwhile, clever utilization of AMPS swelling behavior imparts the modified membrane with physical self-healing properties, as evidenced by scanning electron microscope (SEM) images showing the filling effect of the repaired membrane. Additionally, the construction of a hydrophilic interface increases the contamination resistance (FRR) of the modified membrane to 97 %. In conclusion, the prepared membrane (M4) not only effectively separates dyes/salts but also exhibits excellent alkali resistance and physical self-healing functionality, demonstrating significant potential for practical treatment of alkaline textile wastewater.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Tianya Hu,Duan Yuan,Xiao Fu,Shuai Zhang,Fanfan Cui,Fengchen Li,Huixia Zhou,Xiaoyu Wang,Yong Hong Meng,Yurong Guo
The K + -induced pectin-based vitrimer hydrogel ink, with dynamic exchange properties, offers an innovative solution for single-channel extrusion-based 3D food printing. However, forming hydrogen-bonded cross-linked vitrimer traditionally requires over 150 mM of K + to overcome the electrostatic repulsion between enzyme-modified pectin (EMP) molecules, which raises health concerns due to the high K + content. This study developed a novel strategy to introduce Ca 2+ bridges to partially weaken the electrostatic repulsion, fabricating low-K + vitrimer gel inks. Using 67 mM K + and 0.9 mM Ca 2+ , a densely cross-linked gel (Ca-EMP-K 67 mM) was formed at 25 °C, exhibiting excellent mechanical performance (~140 g hardness). Meanwhile, the gel possessed excellent self-healing properties, with a relaxation time of 8.3 s at 80 °C, confirming its vitrimer status. Notably, the Ca-EMP-K 67 mM gel ink achieved a ~ 55 % reduction in K + doses while enabling an increase in shaping temperature from 4 °C to 25 °C, compared to the traditional EMP-K 150 mM gel ink. These advancements enabled a low-K + pectin ink for ambient 3D printing. The introduction of Ca 2+ not only reduces the K + concentration requirement but also increases the shaping temperature, broadening the gel ink's applications in the food industry.
研究领域:
食品科学
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材料科学
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DOI
PubMed
高影响因子
Advanced Materials Technologies
·
2021
·Vol. 6
·期 7
·2001267
·
IF 7.848
Yonggan Yan,Jiuyu Cui,Xiaoyong Qiu,Hanlian Liu,Xiang Liu,Peng Yao,Jun Huang,Xin Cui,Xiubing Liang,Chuanzhen Huang
Hydrogel coatings have drawn substantial research interest owing to their great potential in developing advanced flexible devices. However, most of them cannot meet the requirement of large-scale application on diverse substrates and would lose their functionalities under harsh conditions. In this work, a large-scale and surface-independent multifunctional hydrogel coating is developed by directly painting and ultraviolet curing hybrid hydrogel precursor containing acrylamide (AM), branched polyethylenimine (PEI), CaCl 2 , and glycerol. Such a coating shows superior anti-fog and anti-frost properties owing to the hydrophilic nature and freezing-tolerance of the hydrogel. Besides, the hydrogel coating possesses excellent self-healing performance at both macro- and micro- scales because of the dynamic hydrogen bonds prevailing between the polymer chains in a gel network. Moreover, this hydrogel coating also exhibits electric conductivity due to the mobile ions present in the gel network. By patterning the hydrogel coating onto an elastic substrate, a foldable tape sensor is fabricated which can sensitively distinguish short-time click (≈0.1–0.2 s) from long-time press (≈1–2 s) and detect electrical signals corresponding to cyclic bending deformation. This work provides practical demonstration of hydrogel coatings for engineering applications where anti-fog, anti-frosting, self-healing, and electrically conductive properties are needed.
研究领域:
材料科学
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表面工程
·
智能材料
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DOI
高影响因子
Journal of Materials Chemistry A
·
2022
·Vol. 10
·期 27
·14300-14309
·
IF 14.511
Xiao-Xia Li,Min Wang,Jing Dai,Huanhuan Liu,Haili Qin
Hydrogels have garnered considerable research attention due to their softness and stimuli-responsiveness in a variety of fields including flexible and wearable sensors. Despite significant advances in mechanical enhancement by employing nanostructures as cross-linkers to regulate network structures, their limited functionality, particularly adhesion and biocompatibility, has greatly hindered their practical application. Here, we report smart hydrogels fabricated by in situ polymerization using assembled casein nanostructures as crosslinking agents. Due to the enhanced branching on the crosslinking points, the fabricated hydrogel with a uniform network structure demonstrated excellent mechanical performance with a stretchability as high as 1600%, a crack strength at 3.7 MPa, and notch insensitivity. In comparison to traditional samples, the crosslinked network demonstrated significantly improved adhesion strength by combining the adhesive behavior of casein units. Furthermore, the presence of reversible metal coordination motivated the hydrogel with multi-responsive self-healing performance under microwave irradiation and alkaline conditions. These excellent performances could be well maintained at wide temperatures ranging from −20 °C to 60 °C with the assistance of glycol. Because of the massive ions throughout the polymer network, flexible and wearable sensors with high performance under diverse mechanical deformations can be facilely fabricated.
研究领域:
材料科学
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生物医学工程
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产品关联
DOI
高影响因子
Advanced Science
·
2023
·Vol. 10
·期 20
·2207527
·
IF 15.1
Lei Yang,Lijie Sun,Hongfei Huang,Wenfan Zhu,Yihan Wang,Zekai Wu,Rasoul Esmaeely Neisiany,Shijia Gu,Zhengwei You
Although highly desired, it is difficult to develop mechanically robust and room temperature self-healing ionic liquid-based gels (ionogels), which are very promising for next-generation stretchable electronic devices. Herein, it is discovered that the ionic liquid significantly reduces the reversible reaction rate of disulfide bonds without altering its thermodynamic equilibrium constant via small molecule model reaction and activation energy evolution of the dissociation of the dynamic network. This inhibitory effect would reduce the dissociated units in the dynamic polymeric network, beneficial for the strength of the ionogel. Furthermore, aromatic disulfide bonds with high reversibility are embedded in the polyurethane to endow the ionogel with superior room temperature self-healing performance. Isocyanates with an asymmetric alicyclic structure are chosen to provide optimal exchange efficiencies for the embedded disulfide bonds relative to aromatic and linear aliphatic. Carbonyl-rich poly(ethylene-glycol-adipate) diols are selected as soft segments to provide sufficient interaction sites for ionic liquids to endow the ionogel with high transparency, stretchability, and elasticity. Finally, a self-healing ionogel with a tensile strength of 1.65 ± 0.08 MPa is successfully developed, which is significantly higher than all the reported transparent room temperature self-healing ionogel and its application in a 3D printed stretchable numeric keyboard is exemplified.
研究领域:
材料科学
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化学工程
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产品关联
DOI
PubMed
高影响因子
ACS Applied Polymer Materials
·
2023
·
IF 5
Zeng Liu,Xing Wu,Shu He,Jia Liu,Xinyu Wei,Wei Shao
Intelligent electronic devices have been diffusely used in health detection, energy storage, and biomedicine based on their autonomy, flexibility, and adaptive improvement, but traditional materials have the drawbacks of limited flexibility, instability, and inadequate reusability. Herein, poly(acrylic acid)-based hydrogels with efficient self-healing performance and high-precision sensing performance were constructed by a supramolecular self-assembled strategy based on electrostatic interactions, metal coordination, and hydrogen bonds. This hydrogel exhibited a tensile strength of 102.9 kPa and an elongation at break of 990% with good fatigue resistance and self-recovery ability. The hydrogel also displayed good light transmission and UV-shielding effects, as well as good adhesion ability on different materials. Besides, the hydrogel had an electrical conductivity of 0.98 S/m, which could light up a light-emitting diode (LED) bulb when connected in a circuit. Based on these great features, the hydrogel exhibited ultrahigh sensitivity with gauge factor values of 4.00 and 17.00 within the strain ranges of 0–200 and 600–800%, respectively. The hydrogel could be applied not only for large human movements but also for detecting subtle movements. Most importantly, the hydrogel exhibited a great self-healing property, which could almost self-heal within 6 h with a healing efficiency of 99%. Therefore, this work provides a multifunctional hydrogel construction method, and the prepared hydrogels displayed great potential application in the strain sensor field.
研究领域:
材料科学
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生物医学工程
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产品关联
DOI
高影响因子
Nanoscale
·
2022
·Vol. 15
·期 2
·791-801
·
IF 8.307
Hui Xu,Xiaoxi Liu,Wenlu Sun,Guanghui Xu,Yihong Tong,Hongyuan Xu,Jiawei Li,Zhao Kong,Yong Wang,Zhiyong Lin,Hong Jin,Hongwei Chen
Currently, a variety of binders are developed to inhibit the rapid capacity fading of Si. The Si anodes are mainly enhanced by the chemical bonding effect on the surface of conventional solid-state binders. However, with a huge volume change of silicon, solid binders are easily deactivated. Herein, a semi-fluid binder termed GPC is designed based on a viscoelastic crosslinking network with abundant active sites and self-healing performance. The backbone of the binder network is in situ synthesized using guar gum (GG), polyacrylic acid (PAA), and citric acid (CA). Serving as the flexible joints and the plasticizer of the network, CA small molecules remarkably improve the viscoelasticity of the binder to tolerate the volume change of Si via rearranging particles in the network during cycling. Moreover, CA can form a layer of surface coating on Si to stabilize the SEI for long-term electrochemical performance. As a result, the Si@GPC electrode shows excellent cycling stability and exhibits a superb capacity of 1292 mA h g−1 after 1000 cycles at 2 A g−1. This work illustrates the advantages and prospects of designing semi-fluid binders for high-performance batteries.
研究领域:
材料科学
·
电化学
·
能源存储
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DOI
PubMed
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2021
·Vol. 138
·期 46
·51371
·
IF 3.125
Yulong Wang,Yaqiong Li,Maoyong He,Jingjing Bai,Bingxiao Liu,Zhenzhong Li
In this work, four aliphatic chain extenders, hexanediol (HDO), hexane diamine (HDA), cystamine (CY), and cystine dimethyl ester (CDE), were chosen to synthesize four kinds of polyurethane and poly(urethane-urea)s (PUs), respectively. HDO extended polyurethanes, HDA extended poly(urethane-urea), CY extended poly(urethane-urea), and CDE extended poly(urethane-urea) were denoted as OPU, APU, CPU, and SPU, respectively. The effect of chain extender type on microphase structure and performance of four PUs was investigated. Our research showed that mechanical strength increased in the following order: OPU < SPU < CPU < APU, and self-healing performance increased in the opposite direction. This result is attributed to the increasing degree of microphase separation: OPU < SPU < CPU < APU. The optimal sample SPU has not only excellent mechanical properties (tensile strength of 27.1 MPa and elongation at break of 397.7%), but also exhibits superior self-healing performance (self-healing efficiencies of 95.3% and 93.5% based on tensile strength and elongation at break). The moderate degree of microphase separation between the soft segments and the hard segments, the introduction of disulfide bonds and low degree of hydrogen bonding are responsible for preparing a polyurethane or poly(urethane-urea) system with high mechanical strength and excellent self-healing performance simultaneously. This work provides useful information for us to develop self-healing polyurethane or poly(urethane-urea) materials in the future.
研究领域:
材料科学
·
高分子化学
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产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Zhenpeng Zhang,Xiaolin Jiang,Yuanhao Ma,Xun Lu,Zhijie Jiang
High performance has always been the research focus of elastomers. However, there are inherent conflicts among properties of elastomers, such as strength and toughness, strength and damping performance, strength and self-healing ability, etc. Herein, first, we synthesized a unique structure of the dangling chain containing proton donors and receptors. Then, we design and fabricate a kind of high-performance elastomer with a gradient distribution of a dangling chain and a dynamic bond structure. The dangling chains of different lengths intertwine with each other and self-assemble to form a “dense accumulation” structure driven by hydrogen bonds, and the elastomer exhibits special micro/nano scale aggregated states and microphase separation. The “dense accumulation” structure plays a vital role in the increase of mechanical properties. Meanwhile, under the joint action of a dangling chain and a dynamic bond, the damping performance and self-healing performance of the elastomer are greatly enhanced. High strength (27.5 MPa), toughness (121.9 MJ·m–3), 94.8% healing efficiency and outstanding damping performance (tan δ ≥ 0.4, high damping temperature range up to 144 °C) are simultaneously achieved beyond the current state-of-the-art. This topoarchitected polymer with a gradient distribution of dangling chains successfully solves the defects of conventional branched polymers in deteriorating their mechanical properties. This material design provides a new strategy for the development of high-performance structural and functional integrated elastomers.
研究领域:
材料科学
·
高分子化学
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产品关联
DOI
PubMed
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2024
·Vol. 34
·期 52
·2411029
·
IF 18.5
Qingtao Zeng,Xuejun Lai,Hongqiang Li,Zhonghua Chen,Xingrong Zeng,Liqun Zhang
The preparation of high-performance and fire-safe electrolytes for flexible quasi-solid-state supercapacitors is challenging. In this work, a novel fire-safe and multifunctional deep eutectic solvent gel (DESG) is fabricated using acrylic acid and urea as hydrogen bond donors and choline chloride as a hydrogen bond acceptor. DESG shows a high ionic conductivity (0.552 S m −1 ), good electrochemical performance (specific capacitance: 106.8 F g −1 ), and a wide operating temperature range (−20–90 °C), being a promising candidate for flexible solid-state supercapacitors. Furthermore, it exhibits a good thermoelectric conversion capability (Seebeck coefficient: 1.56 mV K −1 ), being ideal for thermoelectric capacitors and fire-warning sensors. The prepared DESG rapidly self-extinguishes after removal from fire, reaching a limiting oxygen index value of 38.0% and demonstrating its excellent flame retardancy. In addition, DESG has a good self-healing performance (healing efficiency of 84.3%). The work provides new insights into the preparation and application of high fire-safety and multifunctional eutectogels for flexible quasi-solid-state supercapacitors.
研究领域:
材料科学
·
能源存储
·
柔性电子
✓ 已验证
产品关联
DOI
高影响因子
Materials Research Express
·
2019
·Vol. 6
·期 8
·086472
·
IF 1.449
Zhengjun Shen,Yannan Zhang,Xiaohua Yu
The interfacial microstructure of an Al-based coating on a Ti alloy surface has been designed by using phase diagrams and advanced first-principles calculations. Samples were characterized by x-ray diffractometry, scanning electron microscopy, optical microscopy, high resolution transmission electron microscopy and energy-dispersive spectrometry. The results show that the stability sequence of the Ti–Al intermetallics was Ti3Al > TiAl > TiAl2 > TiAl3. The TiAl3 transition layer with a strong self-healing property was obtained easily by metallurgical reaction of Al and Ti. The Al atoms in TiAl3 combined rapidly with the O atoms to form a new Al2O3 protective layer in air. This work provides theoretical support for the thermal processing of Ti alloys.
研究领域:
材料科学
·
表面工程
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）