ACS Applied Polymer Materials
·
2024
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IF 4.4
Jialiang Li,Yinghu Song,Guojun Song,Zhaoji Li,Xirui Yang,Shuang Yin,Xiaoru Li
The preparation of polyurethane (PU) materials with both low-temperature rapid repair and robust mechanical properties still remains a challenging yet promising endeavor. Herein, a multifunctional linear PU supramolecular elastomer was successfully synthesized, incorporating multiple hydrogen bonds and coordination bonds to endow it with self-healing properties. The results demonstrated that the self-healing PU exhibited strong tensile strength (∼30 MPa), high elongation at break (∼925%), and excellent toughness (∼112 MJ/m3) through synergistic effect of hydrogen bonds and metal coordination bonds. After 12 h of repair at 45 °C, the repair efficiency of the PU film reaches 87%. The self-repairing PU film also possesses excellent transparency with a transmittance exceeding 90%. Furthermore, the PU film demonstrates good recyclability; even after multiple recycling and reshaping, its mechanical properties do not show a significant decrease. Therefore, the development of self-healing PU with low-temperature capabilities holds significant theoretical implications, practical value, and broad application prospects. These materials are expected to find wide-ranging applications in various fields in the future.
研究领域:
材料科学
·
高分子化学
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DOI
高影响因子
Small Methods
·
2023
·Vol. 7
·期 4
·2201694
·
IF 12.4
Xiao-Yun Wang,Si-Yuan Liao,Hai-Peng Huang,Qiao-Feng Wang,Yu-Ying Shi,Peng-Li Zhu,You-Gen Hu,Rong Sun,Yan-Jun Wan
MXenes with unique physicochemical properties have shown substantial potential in electromagnetic interference (EMI) shielding. However, the chemical instability and mechanical fragility of MXenes has become a major hurdle for their application. Abundant strategies have been dedicated to improving the oxidation stability of colloidal solution or mechanical properties of films, which always come at the expense of electrical conductivity and chemical compatibility. Here, hydrogen bond (H-bond) and coordination bond are employed to achieve chemical and colloidal stability of MXenes (0.1 mg mL −1 ) by occupying the reaction sites of Ti 3 C 2 T x attacking of water and oxygen molecules. Compared to the Ti 3 C 2 T x , the Ti 3 C 2 T x modified with alanine via H-bond shows significantly improved oxidation stability (at room temperature over 35 days), while the Ti 3 C 2 T x modified with cysteine by synergy of H-bond and coordination bond can be maintained even after 120 days. Simulation and experimental results verify the formation of H-bond and Ti-S bond by a Lewis acid-base interaction between Ti 3 C 2 T x and cysteine. Furthermore, the synergy strategy significantly improves the mechanical strength of the assembled film (up to 78.1 ± 7.9 MPa), corresponding the increment of 203% compared to untreated one, almost without compromising the electrical conductivity and EMI shielding performance.
研究领域:
材料科学
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化学工程
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DOI
PubMed
高影响因子
POLYMER
·
2023
·
IF 4.6
Xianlu Li,Guoying Zhou,Weibiao Ni,Tingzi Yan,Yongjin Li
The interaction between macromolecules and metal ions plays an important role in biological macromolecules, Metallo-supramolecular polymers, and polymer/salt composite systems . However, the detailed information about the coordination bonds in polymer/inorganic salt complexes at solvent-free state was poorly understood. Particularly, studies of the differentiation between coordinate covalent bonding and ion-dipole interactions are lacking. Herein, we prepared a series of PVA-CuSO 4 composite films with varying CuSO 4 content via solvent casting to probe the effects of CuSO 4 content on the properties of the PVA-CuSO 4 composite films in terms of initial thermal degradation temperature (T d,i ), refractive index (RI), crystallinity as well as glass transition temperature (T g ). Surprisingly, the T d,i , and RI were not always increasing with the increase of CuSO 4 content. Instead, a maximum point happened for both T d, i , and RI at a CuSO 4 /PVA weight ratio of 1%. Furthermore, the lowest level of crystallinity and a turning point in the T g ∼ CuSO 4 content curve were observed when the CuSO 4 /PVA weight ratio was 1%. These results consistently indicated that the composite with a CuSO 4 /PVA weight ratio of 1% formed the largest amount of coordinate bonds, while the further increase of CuSO 4 content might lead to ion-dipole interactions, which could destroy the formation of coordinate bonds. Moreover, both XPS and UV–visible absorption spectrum showed that copper (II) ions were at different bonding states when CuSO 4 /PVA weight ratio was below and above 1%, proving the proposition that coordinate bonds in PVA-Cu 2+ composite saturated at a CuSO 4 /PVA weight ratio of 1%. Taken together, our results provided evidences for using a novel perspective to understand the coordination bonds formed in polymer/inorganic salt complexes at solvent-free state. Such findings could not only help to enrich the fundamental research but can also guide the future development of advanced polymer/salt complexes.
研究领域:
材料科学
·
化学
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DOI
高影响因子
Journal of Materials Chemistry A
·
2025
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IF 9.5
Yan Zhai,Mengxiao Lv,Fei Shan,Tao Qi,Siwen Cui,Hao Lan,Jun-Peng Wang
Polymers exhibiting photoinduced solid-to-liquid phase transitions have garnered significant attention due to their potential applications in smart materials. However, the simultaneous achievement of high strength and extensibility remains a significant challenge. In this work, we present an innovative approach to overcome this limitation by incorporating coordination bonds into the polymer backbone. Specifically, we have developed a photothermal solid-to-liquid transition polymer (PSLTP) based on PTMG oligomers end-capped with ligand motifs that coordinate with lanthanide (La3+) ions. Upon exposure to 365 nm light, the polymer efficiently absorbs photons and converts them into thermal energy, inducing the dissociation of coordination bonds and triggering a reversible solid-to-liquid phase transition. The resulting nanoconfinement phases, due to coordination bond-induced structures, significantly enhance the polymer's mechanical properties, including a tensile strength of 22 MPa and a break elongation of 1240%. These unique properties render the polymer particularly promising for applications requiring reversible bonding and self-healing capabilities for large-scale damages. This study underscores the potential of coordination bond-based systems in the design of photothermal polymers, offering insights into their underlying mechanisms and practical applications in responsive materials.
研究领域:
材料科学
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高分子化学
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智能材料
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产品关联
DOI
高影响因子
Small
·
2024
·
IF 13
Ning Yu,Bingxu Cheng,Yang Liu,Wei Wu,Robert K. Y. Li,Zihui Liang,Fangchao Cheng,Hui Zhao
The development of self-healing materials provides a new opportunity and challenge for advancing triboelectric nanogenerators (TENGs). However, the low strength and low toughness of self-healing triboelectric materials often result in the deformation or breakage of TENG under high mechanical loads, thereby limiting their potential applications. Herein, a new strategy for fabricating self-healing triboelectric materials is reported, which introduces cross-linking networks with hydrogen bonds and metal coordination bonds. The desired high performance can be achieved by simply adjusting the molar ratio of the metal to the ligand. When the molar ratio is 1:2, the tensile strength, toughness, and elongation at break of the material reached 13.7 MPa, 76.9 MJ m −3 , and 1321%, respectively. Furthermore, its self-healing efficiency can reach 74% at 70 °C in 6 h. Working in contact-separation mode, the electrical output can reach 164 V, 18.2 µA, 57.5 nC, with a maximum power density of 2.54 W m −2 . Notably, even if it is sheared, the electrical output performances of TENG can be completely recovered to the original state. In addition, the developed TENG exhibits excellent output stability over 10 000 contact separation cycles. This study presents a promising approach for the development of stretchable smart generators.
研究领域:
材料科学
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纳米技术
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能源材料
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2024
·
IF 9.4
Xiaorui Wang,Hao Li,Wenhui Fu,Qiushi Chen,Xuzhong Gong,Zhi Wang,Junhao Liu
Binders provide a straightforward and efficient strategy to mitigate the significant challenge of volume expansion in silicon anodes for lithium-ion batteries. To improve the cycle life of silicon anodes, a cross-linked binder carboxymethyl cellulose–phytic acid–pyrrole (CMC-DP) is designed and synthesized using carboxymethyl cellulose, phytic acid, and pyrrole. The numerous hydroxyl groups in phytic acid provide abundant binding sites for the formation of hydrogen and ester bonds. The formation of hydrogen bonds and covalent bonds enhances the mechanical properties of the adhesive. The amino groups in the binder form N Si O covalent bonds with silicon particles, while the hydroxyl and carboxyl groups form (COO) 2 Cu and (OH) 2 Cu coordination bonds with the copper foil, enhancing interfacial adhesion. When the CMC-DP10 (10 µL pyrrole) binder is applied to silicon nanoparticles (∼30 nm), the specific capacity of the electrode can be maintained at around 1700 mAh/g after 500, whereas the CMC binder achieves only ∼100 mAh/g under the same conditions. This work demonstrates that the CMC-DP binder exhibits strong adhesion to both silicon nanoparticles and copper foil.
研究领域:
材料科学
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电化学
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能源存储
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产品关联
DOI
PubMed
高影响因子
EUROPEAN POLYMER JOURNAL
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2025
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IF 6.3
Zhi Li,Xingshuang Lv,Xunling Zhu,Xiaohui Fu
It is challenging to achieve the room-temperature self-healing polymers with high healing efficiency and excellent integrated mechanical properties, which are highly desirable in various fields. Herein, we propose a new design strategy to prepare room temperature self-healable and recyclable polyurethanes (PUs), in which both dynamic metal–lysine coordination bonds and dual H-bonds were simultaneously embedded. At first, three metal–lysine coordination complexes, i.e. Zn(Lys) 2 , Cu(Lys) 2 and Mg(Lys) 2 , were synthesized and characterized, which were used as chain-extenders for the subsequent preparation of PUs. These complexes of Zn(Lys) 2 , Cu(Lys) 2 and Mg(Lys) 2 exhibited a distinct behavior after incorporation into PUs. The mechanical and self-healing properties of these metal-lysine containing PUs (PU-M−x, M = Zn 2+ , Cu 2+ and Mg 2+ , x represents molar percentage of M(Lys) 2 in chain extenders) can be easily tuned by simply adjusting the type and the amount of metal–lysine coordination complexes added. The PU films displayed excellent mechanical properties with the tensile strength at break varying from 17.2 to 43.0 MPa, the ultimate elongation above 657.0 % and toughness above 45.0 MJ m −3 . Among these elastomers, both PU-Zn-20 and PU-Mg-10 shows outstanding self-healing efficiency over 92.0 % based on toughness at 25 °C for 24 h due to the the multiple dynamic interactions including dynamic metal–lysine coordination bonds and hydrogen bonds within their networks. In particular, PU-Zn-20 exhibits the best comprehensive properties, of which tensile strength, breaking strain, and toughness are as high as 25.4 MPa, 832.3 %, and 59.8 MJ m −3 , respectively. Furthermore, these PUs could also be reprocessed with excellent recovered mechanical properties. We demonstrate that the self-healing elastomers have a potential application as a flexible substrate for the easy fabrication of healable electrodes.
研究领域:
材料科学
·
化学
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产品关联
DOI
高影响因子
Journal of Materials Research and Technology-JMR&T
·
2024
·
IF 6.2
Hongrui Liang,Haolang Liu,Yubo Chen,Yongxi Cui,Tongan Bu,Zhi Wang
The toughening modification of polybenzoxazine is a crucial approach for expanding its application. However, enhancing the toughness of polybenzoxazine poses challenges in concurrently improving comprehensive properties, such as thermal stability, while reducing the curing temperature. To address this issue, we designed a new polyurethane (CIPU) rich in hydrogen bonding and metal coordination bonding and blended it with benzoxazines to tough polybenzoxazine while enhancing their properties across various aspects. Specifically, the addition of 10% CIPU to benzoxazines increased the toughness of polybenzoxazines by 165.3%, attributed to the relative softness of CIPU and multiple sacrificial bonds. Furthermore, the coordination of free In 3+ resulted in a significant enhancement in thermal stability and decrement in curing temperature, evidenced by the increase in residual carbon from 30% to 37% at 800 °C and a decrease in the onset of curing temperature from 246.9 °C to 170.7 °C. This work not only introduces a new system for toughening benzoxazine, but also provides unique insights into hydrogen bonding as well as metal-ligand bonding on toughing thermoset resins.
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
CHEMICAL ENGINEERING JOURNAL
·
2020
·
IF 10.652
Yu-han Li,Wen-juan Guo,Wen-juan Li,Xin Liu,Hao Zhu,Jin-ping Zhang,Xing-jiang Liu,Liu-he Wei,Ai-ling Sun
It is challenging to simultaneously improve the toughness and self-healing ability of thermoplastic polyurethane (TPU) due to mutually exclusive dependence on chain motion and hard phase. In this work, a novel poly(urethane urea) (PUU) was synthesized by using 2, 6-diamimopyridine (Py) and cystamine (Cy) as chain extenders and subsequently complexed with Zn 2+ ions. It is revealed that the pyridine moieties together with formation of coordinative bonds significantly influences microphase separation by interfering with hydrogen bonding. A Py/Cy molar ratio of 1:2 is optimal to remarkably improve the toughness and self-healing ability. Specifically, its tensile strength, toughness and self-healing efficiency simultaneously improve to 9.40 ± 0.10 MPa, 64.49 ± 1.75 MJ/m 3 , and 96.64 ± 1.52% with 92%, 139% and 29% increment compared to PUU-Cy, respectively. The synergistic enhancing effect is the consequence of compromised hard phase and coordinative bonds. Firstly, decrease of hard domain content leads to loosely packed hard segments dispersing in soft phase, facilitating disulfide exchange. Secondly, the coordinative bonds serving as dynamic crosslinking joints not only restrict chain dislocation but also contribute to better self-healing ability than hydrogen bonds. An electrode film derived from embedding silver nanowires (AgNWs) into this material exhibits self-repairable and robust sensing properties due to reconstructing conducting network by self-healable matrix. This unique feature endows it with a great potential in the field of flexible electronics and wearable devices.
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
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2023
·
IF 4.2
Yujia Hao,Guangming Zhu,Ben Li
The synthesis of polymeric materials that simultaneously possess multiple outstanding mechanical properties and self-healability is always a great challenge. Herein, we report the synthesis of a robust and self-healing polyurea material, which contains a dual metal coordination structure of Zn(II)-urea and Zn(II)-diamidepyridine as well as dense hydrogen bonds. Due to the synergistic enhancement of dynamic coordination bonds and hydrogen bonds in the supramolecular network, the obtained polyurea materials possess a combination of excellent mechanical properties and high-efficiency self-healing properties, which are adjustable by varying the content of Zn(II) ions. The optimal PU-L/Zn-3 sample has a tensile strength of ∼22.82 MPa, while the elongation at break is ∼1312% and the toughness is ∼222.68 MJ/m3. In addition, the fully cut sample exhibits a high healing efficiency of 95.7% based on toughness after treatment at 50 °C for 4 h. Multi-dynamic cross-linked polymers might provide a new way to obtain robust self-healing materials for protection materials and wearable electronics.
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
CARBOHYDRATE POLYMERS
·
2024
·
IF 10.7
Xiaokai Jing,Sufeng Zhang,Fengjiao Zhang,Congcong Chi,Shuyuan Cui,Hao Ding,Jinrui Li
Due to the unsatisfactory mechanical properties of natural polymer-based conductive hydrogels , their applications are limited. Shaanxi Biangbiang noodles can be toughened by applying external mechanical forces through stretching and beating movements; this process provides inspiration for the preparation of high-strength hydrogels. In this paper, we propose a strategy for the preparation of ultrastrong and ultratough conductive hydrogels by directional prestretching and solvent exchange. Neatly arranged fiber bundles containing many intermolecular hydrogen bonds and metal ion coordination bonds are successfully constructed inside the prepared hydrogels. The hydrogel has exceptional mechanical properties, with a fracture stress exceeding 50 MPa, fracture strain approaching 105 %, fracture toughness exceeding 30 MJ m −3 , and high conductivity reaching 11.738 ± 0.06 mS m −1 . Impressively, the hydrogel can maintain its high mechanical properties after being frozen at an ultralow temperature of −80 °C for 7 days. Compared with other tough hydrogels, natural tendons and synthetic rubbers , the hydrogel exhibits excellent mechanical properties. The cellulose-based conductive hydrogel prepared in this study can be applied to robotic soft tissues (such as the Achilles tendon) that require high strength and are operated in extreme environments.
研究领域:
材料科学
·
生物医学工程
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产品关联
DOI
PubMed
高影响因子
INORGANIC CHEMISTRY
·
2025
·
IF 4.7
Junxiang Lu,Yuting Liu,Shasha Zhang,Juhong Nie,Bing Tang,Jia Guan,Jian Zhang
Regulating the strength of coordination bonds plays an important role in synergizing the activity and stability of single-atom catalysts (SACs) but is often limited due to coordination atoms from the inorganic carrier lattice being tough to modify. It is fascinating yet rarely explored to immobilize organic molecules on lattice atoms for modulating the character of coordination bonds. Herein, a valid inorganic–organic coupling strategy is developed to enhance Pd–O coordination bonds within Pd-SAC for reconciling activity and stability. Nickel hydroxide enriched with Ni2+ vacancies is utilized to bind Pd centers, and dimethylglyoxime (DMG) bonds with its OH groups by H2 reduction, forming a Pd–O-DMG structure. Compared with the pristine Pd–O structure, whose activity descends greatly during the recycling process, the Pd–O-DMG structure makes the activity unchanged after 6 used times for the Suzuki–Miyaura reaction. The Pd-SAC has mild and economic reaction conditions (at 70 °C under air in ethanol without excess base) and good substrate tolerance. Further theoretical calculations show that coupled DMG induces hydrogen bonds on O atoms of the oxazole around Pd centers and thus strengthens Pd–O coordination bonds to exhibit good stability and activity.
研究领域:
催化化学
·
材料科学
·
理论计算
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）