CHINESE JOURNAL OF CHEMISTRY
·
2020
·Vol. 38
·期 5
·494-500
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IF 3.826
Changzhuang Bai,Qiuhua Huang,Xiaopeng Xiong
Summary of main observation and conclusion Self-healing hydrogel such as polyacrylic acid (PAA) hydrogel has attracted increasing attention based on its promising potential applications. However, it usually suffers from low strength especially as mechanical device. Herein, a commercial microcrystalline cellulose (MCC) was modified with acrylamide to graft polyacrylamide (PAM) chains on the particle surface. The acrylamide-modified MCC (AM-MCC) was then dispersed in monomer solution of acrylic acid to prepare composite hydrogel. The mechanical properties of the obtained composite hydrogels and the self-healed hydrogels were carefully measured by compressive and tensile tests, and by dynamic mechanical analysis. Our results demonstrate that introduction of a small amount of AM-MCC such as 3 wt% can not only reinforce the original hydrogel and the healed hydrogel markedly, but also improve self-healing efficiency obviously. The analyses indicate that in addition to the reversible multi-interactions such as hydrogen bonding and ionic interactions, the entanglements between the PAA chains of the hydrogel matrix and the PAM chains grafted on the MCC particles have also played an important role on the improvement in mechanical performances and the healing ability of the hydrogel. Moreover, the responsiveness to exterior ion has been tested to indicate potential application of the composite hydrogel as self-healable sensor.
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
Polymer Chemistry
·
2013
·Vol. 5
·期 6
·1945-1953
·
IF 5.231
Bo Yang,Huan Zhang,Huiying Peng,Yuanze Xu,Bowei Wu,Wengui Weng,Lei Li
In this study, we develop a series of new materials that can simultaneously and reversibly self-heal without external stimuli based on metallo-supramolecular interactions. Multiple tridentate 2,6-bis(1,2,3-trizaol-4-yl)pyridine (BTP) ligand units synthesized via a copper-catalyzed azide–alkyne cycloaddition (CuAAC) “click” reaction are incorporated into the polymer backbone of a ligand macromolecule through a thiol–ene “click” reaction. 3D transient supramolecular networks are formed from the ligand macromolecule upon coordination with transition and/or lanthanide metal ions. As compared to the ligand macromolecule, the resultant supramolecular films exhibit improved mechanical properties, such as Young's modulus, strength and toughness, which can be readily tuned by the stoichiometric ratio of Zn2+ to Eu3+ to Tb3+. The supramolecular films exhibit characteristics of weakly crosslinked networks where the storage modulus G′ and loss modulus G′′ scaled with normalized frequency ωaT by the same slope of 0.5. Both the supramolecular bulk films and gels are found to exhibit fast and effective self-healing properties by virtue of the kinetically labile nature of the metal–ligand interactions.
研究领域:
材料科学
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化学
✓ 已验证
DOI
高影响因子
POLYMER TESTING
·
2023
·
IF 5.1
Xiaohao Tang,Xin Guo,Xiao Liu,Guangye Liu,Li Liu,Baogang Zhang
In order to overcome the sharp damping peak that limits the application of polyurethane elastomers (PUE) and the cut that affects its service life as functional floor coating, a self-healing PUE with broader damping temperature range and high self-healing efficiency was prepared by incorporation of prepolymer synthesized from polycaprolactone diol and isophorone diisocyanate and chain extenders including 4,4′-diaminodiphenyl disulphide (DAPS) and double-hydroxyl suspended chains synthesized from IPDI, polyethylene glycol monomethyl ether and 2-amino-1,3-propanediol. The effects of different functionalities were carefully investigated at the fixed dosage of 30%. DAPS with dynamic disulfide bonds were revealed of higher efficiency in improving the damping properties and self-healing rate. The synergistic effects of the two functionalities were studied by varying the usage of DAPS from 10% to 50% when the suspension chain amount fixed at 30%. The effective damping (tan δ > 0.3) domain presents a range of 131.57 °C with 100% increase of tan δ compared with the base sample, and the self-healing efficiency reaches 95% when the usage of DAPS and suspension chain were 30% and 50%, respectively. The modified material achieved prominent improvement in damping properties and cut self-healing ability, showing potential application in aerospace and acoustic coatings for vibration and noise reduction.
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
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2021
·Vol. 31
·期 11
·2008328
·
IF 18.808
Jiaming Lou,Zenghe Liu,Lei Yang,Yifan Guo,Dong Lei,Zhengwei You
Actuators have shown great promise in many fields including soft robotics. Since reconfiguration allows actuators to change their actuation mode, it is considered a key characteristic for new-generation adaptive actuators. However, it remains a challenge to design simple and universal methods to fabricate actuators that can be reconfigured to allow diverse actuation modes. Here, a macroscopically discretionary healing-assembly strategy to fabricate reconfigurable soft actuators based on intrinsic self-healing poly(dimethylglyoxime-urethane) (PDOU) elastomers is developed. The PDOU elastomers with different degrees of crosslinking show different responsiveness to solvents, and are seamlessly healed. Crosslinked and non-crosslinked PDOU elastomers as building units are healing-assembled into actuators/robots with diverse actuation behaviors. Notably, the assembled actuators/robots are readily reprogrammed to exhibit multiple actuation modes by simply tailoring and reassembling without any external stimuli. This work paves a new, simple, powerful, and universal method to construct sophisticated soft robots.
研究领域:
材料科学
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软体机器人学
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DOI
高影响因子
POLYMER ENGINEERING AND SCIENCE
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2023
·Vol. 64
·期 2
·779-787
·
IF 3.2
Xiang Zhang,Zhenggang Xiao
Organic anticorrosion coatings (OACs) are the most effective, economical, and environmentally friendly protection strategy for metals. However, the traditional OACs usually inevitably suffer mechanical cracks during their service life. If not repaired in time, the resultant cracks in OACs will result in irreparable corrosion of the metal substrate. More detrimentally, these microcracks are not easily detectable at the initial stage. If OACs can autonomously heal their damage at the initial stage, the microcracks will be repaired in time and the metal substrate will be protected well. Thus, giving OACs the self-healing capability is a promising strategy for metal protection. Herein, an autonomously self-healing TiO 2 -reinforced silicone polyurea (SPU- g -TiO 2 ) elastomer was successfully designed as anticorrosion coating for Q235 carbon steel (QCS) protection. The SPU- g -TiO 2 elastomer matrix exhibited excellent stretchability with a maximum strain of 3826.72% and fast self-healing ability with an outstanding self-healing efficiency of 98.69% for 6 h without any external stimulus at room temperature. The QCS coated with SPU- g -TiO 2 showed excellent damage resistance and good anticorrosive ability, and it can self-heal the microcracks generated in its coating in time to prevent corrosive media corroding the internal mental substrate. This work has a positive guiding significance for the development of functional OACs to improve their protection for metallic materials. Highlights A bionic smart self-healing SPU- g -TiO 2 coating was successfully synthesized. The mechanical and self-healing properties are balanced using nanoparticles. The coating features excellent self-healing capability and stretchability. Q235 steel coated with SPU- g -TiO 2 shows good anticorrosive ability.
研究领域:
材料科学
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腐蚀工程
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聚合物化学
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DOI
高影响因子
ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Jiang Zhai,Su-Yu Liu,Qing Li,Chang Liu,Xiao-Qing Yu,Guo-Xing Li,Su Chen
3D printing efficiency, as a key indicator of additive manufacturing technology, directly affects its competitiveness in rapid prototyping, small batch production, and even large-scale industrial applications. Compared with traditional manufacturing methods, the high efficiency of 3D printing is often considered a bottleneck, hindering its application across various fields. Herein, a versatile and efficient strategy is proposed, namely, the dimensional reduction printing (DRP) process, to break the obstacle of high efficiency of 3D printing. Specifically, the self-healing CDs/PMMA nanocomposites were constructed via introducing carbon dots (CDs) synthesized by microfluidics into poly(methyl methacrylate) (PMMA) materials. Under the assistance of abundant hydrogen bonding and the entanglement of polymer chains, the fabricated CDs/PMMA nanocomposites exhibited outstanding self-healing properties, which can be utilized as ideal printing inks to achieve a highly efficient 3D printing process through assembling the printed simple 1D and 2D components into complex 3D models. We firmly believe that the DRP strategy opens up an idea for the design of a 3D printing process and points out the direction for the meaningful application of 3D printing technologies.
研究领域:
材料科学
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化学工程
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制造技术
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产品关联
DOI
PubMed
高影响因子
COMPOSITES PART B-ENGINEERING
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2023
·
IF 13.1
Can He,Meng Cai,Yu Huang,Xiaoqiang Fan,Minhao Zhu
Despite Ti 3 C 2 T x MXene has certified tremendous promise for improving the anti-corrosion/wear of epoxy resin, it falls short of matching the protective standards under long-term extreme conditions. Herein, 2-methylimidazole zinc salt ZIF-8 was grown in-situ on amino-functionalized Ti 3 C 2 T x nanosheets and doped with cerium cations (P + -Ti 3 C 2 T x @ZCe). The Ti 3 C 2 T x -based composite was then parallel arranged within epoxy coating utilizing electrophoretic deposition technique to prepare a novel self-healing intelligent coating (PMX@ZCe). The encapsulation structure of P + -Ti 3 C 2 T x @ZCe was investigated by XRD , FTIR, XPS, FE-SEM, TEM, Zeta potential and TG techniques. Furthermore, the corrosion/wear resistance and self-healing performances of PMX@ZCe were discussed detailedly and the strengthening mechanism of P + -Ti 3 C 2 T x @ZCe was revealed. Results indicate that PMX@ZCe maintains the highest |Z| 0.01Hz value of 1.24 × 10 10 Ω cm 2 after 4 weeks of electrochemical test and exhibits excellent self-healing efficiency of 153 % under artificial scratch, which is ascribed to the release of Ce 3+ /Ce 4+ that could form insoluble protective films at the coating/metal interface. The wear rate of PMX@ZCe is 2.29 × 10 −5 mm 3 /N · m about 56 % lower than that of EP. PMX@ZCe possesses satisfactory corrosion/wear protection performance, thanks to the synergy of good interfacial interaction , parallel-aligned barrier effect and active-passive protection. This work provides a new design thinking for MXene-based intelligent protective coatings that can meet the demands of multi-service environments.
研究领域:
材料科学
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表面工程
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腐蚀科学
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产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2025
·
IF 5.4
Ban Chen,Xiaodong Xue,Ying Guo,Feng Peng,Jiao Li,Yue Zhu,Ye Zhou,Donghui Wang,Chunyong Liang,Zugui Wu
Magnesium is considered a promising orthopedic implant material due to its excellent biocompatibility and biodegradability. However, its rapid degradation and the associated corrosive byproducts can trigger inflammatory responses, limiting clinical application. To address this issue, a self-healing Mg-based composite coating was developed, consisting of an inner layer of dicalcium phosphate dihydrate (DCPD), a middle layer of polylactic acid (PLA) containing the corrosion inhibitor phytic acid (PA), and an outer PLA layer. The dissolution of the DCPD layer releases Ca²⁺ and PO₄³⁻ ions, which react with Mg²⁺ to form a stable calcium-phosphate (Ca-P) precipitate. Simultaneously, PA molecules released from halloysite nanotubes (HNT) in the middle layer chelate with Mg²⁺ to form magnesium phytate, enhancing corrosion resistance through a synergistic mechanism. Scratch tests demonstrated that the coating effectively inhibited corrosion propagation after 8 h of immersion in 0.9 wt% NaCl solution. During immersion, the current density initially increased from 1.460 × 10 - ⁸ A·cm −2 to 8.374 × 10 −7 A·cm −2 , followed by a slight decrease to 6.338 × 10 −7 A·cm −2 , indicating a self-healing response. In vitro experiments with MC3T3-E1 cells confirmed good biocompatibility of the coated Mg. Furthermore, in a rat femoral implantation model, the coated Mg exhibited improved in vivo corrosion resistance and enhanced new bone formation, with elevated expression of osteocalcin (OCN) and osteopontin (OPN) around the implant.
研究领域:
生物材料
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医学工程
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腐蚀科学
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产品关联
DOI
高影响因子
ACS Applied Polymer Materials
·
2024
·
IF 4.4
Chunpeng Chai,Zhenqian Ma,Xuan Yin,Haosheng Pang
Self-healing polyurethane is a matrix material that can effectively extend the service life of composite materials. The layered two-dimensional Ti3C2Tx material has weak interlayer van der Waals forces, which can undergo slip and form transfer films during friction, reducing shear strength and improving the lubrication performance of the material. Therefore, we introduced two-dimensional Ti3C2Tx into a self-healing polyurethane matrix to improve the lubrication performance of the matrix material. A dual-ion self-healing polyurethane (SPU) was prepared using N-methyl diethanolamine, hexamethylene diisocyanate, and 1,3-propane sultone as raw materials. Ti3C2Tx was prepared by chemical etching, and NH2–Ti3C2Tx was obtained by chemically grafting amino groups onto the surface of Ti3C2Tx using amino-propyltriethoxysilane. Then, it was mixed into the SPU matrix to obtain the NH2–Ti3C2Tx/SPU composite material. Compared with pure SPU, the friction coefficient and wear rate of the system were reduced by 79.7% and 97.8%, respectively. Under 75%RH and 20 °C conditions, self-healing could be achieved rapidly within 5 min, with a self-healing efficiency of 84.4%. The kind of self-lubricating and self-healing polyurethane modified by amination-Ti3C2Tx is expected to be applied in automotive, electronics, and biomedicine.
研究领域:
材料科学
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摩擦学
·
纳米复合材料
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产品关联
DOI
高影响因子
ACS Applied Polymer Materials
·
2025
·
IF 4.7
Jiansheng Dong,Dunjie Fang,Meiling Xie,Yunjie Yin
Potential applications of great significance encompass bioimaging, drug delivery, fluorescence sensing, and photocatalysis, wherein CDs can excel due to their distinctive optical properties and environmental compatibility. Conversely, CDs in solutions often exhibit instability and their fluorescence is frequently quenched by aggregation phenomena and interactions with dissolved oxygen, thereby limiting their practical applications. To mitigate these challenges, an innovative encapsulation method was devised by incorporating CDs into a biodegradable poly(lactic acid)-based polyurethane matrix via a Schiff base reaction, thereby enhancing their stability and optical properties. Characterization outcomes demonstrate that the CDs@PU composite exhibits robust fluorescence retention, self-healing capabilities, and enhanced mechanical durability. Fluorescence-based active damage detection tests substantiate autonomous active damage sensing and self-repair functionalities. The study delineates how the developed material could offer a durable and multifunctional composite, which is particularly valuable for sustainable diagnostic and self-healing applications.
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
RSC Advances
·
2016
·Vol. 6
·期 26
·21362-21366
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IF 3.289
Yu-Peng Liu,Hui-Fen Liu,Yan-Ge Feng,Zhi-Lu Liu,Hai-Yuan Hu,Bo Yu,Feng Zhou,Qun-Ji Xue
Transparent superhydrophobic coatings for the protection of material surfaces are becoming more and more important along with the rapid development of intelligent electronic displays. Here we present an easily fabricated, transparent and healable superhydrophobic self-cleaning coating. The polyaniline nanofiber network is coated with a silica shell by chemical vapor deposition of tetraethoxysilane catalyzed by ammonia. A porous silica nanotubular coating is obtained after calcination. By releasing perfluorooctyl acid packed in the pores of nanotubes at mild conditions, healable self-cleaning performance of the coating is achieved. The coating has high transparency for reading letters and pictures beneath the coated glass plate.
研究领域:
材料科学
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化学工程
✓ 已验证
DOI
高影响因子
EUROPEAN POLYMER JOURNAL
·
2018
·
IF 3.741
Ting Li,Zhining Xie,Jun Xu,Yunxuan Weng,Bao-Hua Guo
In this work, diamine chain extenders containing disulfide bonds are reacted with triisocyanates to yield dynamic chemical cross-links based on exchangeable disulfide bonds. The polyurea system with dynamic bonding shows drastic decline of storage modulus and very short relaxation times above 150 °C so that this polymer exhibits typical dynamic properties, e.g. self-healing, recycling and hysteresis loop recovery. The introduction of disulfide bonds dominates the thermal stimulated dynamic properties, since the control samples without disulfide bonds have longer relaxation times even at high temperatures. Interestingly, presence of disulfide bonds leads to the decline of hydrogen bonding strength which can result in their easier dissociation and subsequently easier topological network rearrangement. In addition, almost complete reversibility of the hydrogen bonding is observed from temperature-dependent Fourier Transform Infrared Spectroscopy, which reveals the important influence of hydrogen bonding on dynamic properties. Thus, Hydrogen bonding dissociation is an indirect reason of dynamic properties, while exchange reaction of disulfide bonds is the primary cause. The results may deepen our understanding of the role of hydrogen bonding in the dynamic materials. In addition, the available commercial raw component, operational feasibility and simplicity constitute a great advantage of the so-prepared dynamic polyurea system, i.e. an effective step to implementation of industrial applications and recycle the nonbiodegradable crosslinked polyureas.
研究领域:
材料科学
·
化学
✓ 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）