CHEMICAL ENGINEERING JOURNAL
·
2019
·
IF 8.355
Anyao Ma,Guanglin Wang,Zhenglong Yang,Liangjiu Bai,Hou Chen,Wenxiang Wang,Huawei Yang,Donglei Wei,Lixia Yang
Janus nanomaterials can be highlighted to design a series of smart materials with the remarkable characteristic of two different properties or constituents. In this manuscript, functional Janus graphene oxide-type (GO-type) nanomaterials were fabricated by Pickering emulsion template and successfully applied to develop of dual self-healing nanocomposite hydrogels. Asymmetric functionalization of Janus nanosheets were achieved in typical oil-in-water Pickering emulsion by atom transfer radical polymerization (ATRP) and mussel-inspired chemistry. Poly(2-(acryloyloxy)ethyl ferrocenecarboxylate) (PMAEFc) and polydopamine (PDA) were unsymmetrically grafted on the two sides of GO (Janus GO-PMAEF/PDA (JGNs)), which successfully applied in self-healing nanocomposite hydrogels. The collaborative effect of metal-ligand coordination and host-guest interaction make the dual self-healing hydrogels have excellent self-healing properties (self-healing efficiency can reach to 93.4% within 1 h) and mechanical strength (tensile strength of 0.94 MPa and strain of 508.5%). Therefore, these chemical asymmetric JGNs have outstandingly application prospect in the development of smart materials.
研究领域:
材料科学
·
化学工程
·
高分子化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Wenpeng Zhao,Zixiang Zhang,Jian Hu,Xianqi Feng,Jun Xu,Yumin Wu,Shouke Yan
Fabrication of self-healing elastomers with high strength and real-time (<30 s) self-healing capability is still a huge challenge. It is well documented that biological tissues with hierarchically anisotropic structures possess excellent self-healing and mechanical properties. Self-healing elastomer with similar hierarchically anisotropic structures as biological tissues has, however, not been reported yet. Herein, we highlight a facile strategy to fabricate self-healing elastomers with hierarchically anisotropic structures similar to tendons and ligaments by drying precursor hydrogels under fixed strains. Elastomers obtained by drying at 200% strain exhibit a high strength (8.4 MPa) and ultrafast self-healing ability (86% recovery after 10 s) under ambient conditions. Besides, elastomers with a surface CNT coating layer can be easily prepared by directly spraying the CNT suspension onto the surface of precursor hydrogel before drying under strain. Benefiting from the hierarchical structure of the surface CNT layer, the elastomer can be used as a sensor to detect minute human motions. This study provides a novel strategy for fabricating hierarchically anisotropic self-healing elastomers and simultaneously achieving high strength and real-time self-healing ability.
研究领域:
材料科学
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生物仿生学
·
传感器技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2025
·
IF 2.8
Heng Xu,Zhen Liu,Zhijie Fan,Xiandie Zhang,Haozhe Li,Kai Yao,Wei Wang,Bizhen Chen,Xiaode Guo
Material self-healing involves the dissociation and reorganization of the dynamic bonds of materials. Thus, the material self-healing process is primarily driven by the dynamic nature of bonds and the high mobility of molecular chains. However, the low bond energy of these dynamic bonds limits the enhancement of the strength of materials, and their inability to withstand harsh real-world conditions compromises their service life. Therefore, the current research focus in this field remains on high-strength self-healing materials. In this study, a hierarchical hydrogen-bonded crosslinking network was constructed and a high-strength self-healing polyurethane material was successfully synthesized. Infrared and hydrogen spectroscopy analyses reveal that the hierarchical hydrogen-bonded crosslinked network features both strong and weak hydrogen bonds. The strong hydrogen bonds preserve the mechanical strength of the polyurethane material, whereas the breaking and rapid reformation of the weak hydrogen bonds support its self-healing ability. The experimental data show that PUGI-A 1 O 1 exhibits a high tensile strength of 49 MPa and a self-healing rate of 98% at 80°C for 12 h.
研究领域:
高分子材料
·
功能材料
·
材料化学
·
纳米复合材料
·
智能材料
✓ 已验证
产品关联
DOI
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
·
2020
·
IF 6.551
Haoyang Fu,Hongfei He,Runliang Zhu,Lan Ling,Weixian Zhang,Qingze Chen
This work successfully fabricated a novel magnetic adsorbent, i.e., phosphate modified magnetite@ferrihydrite (Mag@Fh-P), and explored its potential application for Cd(II) removal from water, soil, and sediment. To synthesize the adsorbent, ferrihydrite-coated magnetite (Mag@Fh) was firstly developed with partially acid-dissolved natural magnetite particles, followed by in-situ synthesis of ferrihydrite on magnetite surface via alkali addition. Selection of natural magnetite as iron source for ferrihydrite synthesis and as magnetic core is believed to save the cost of adsorbent. Then, phosphate was loaded on Mag@Fh by impregnation-heating treatment to produce Mag@Fh-P. Batch adsorption experiments revealed that the Cd(II) adsorption on Mag@Fh-P could reach equilibrium within 60 min, and the calculated adsorption capacity using Langmuir model was 64.1 mg/g, which was significantly higher than that on magnetite (0.44 mg/g) and Mag@Fh (23.9 mg/g). The results from X-ray photoelectron spectroscopy analysis and batch adsorption experiments confirmed that both ligand exchange and electrostatic attraction contributed to Cd(II) adsorption. Besides, Mag@Fh-P can also be an efficient amendment for soil and sediment remediation. The spent Mag@Fh-P could be easily recovered via magnetic separation, accompanied by the significant decrease in total Cd(II) concentration in soil/sediment. At an adsorbent dosage of 2 wt%, 0.82 and 0.74 mg/kg of total Cd(II) in soil and sediment was removed, respectively. In all, the synthesized Mag@Fh-P as adsorbent has the merits of cost effectiveness, fast adsorption rate, high adsorption capacity, and easy separation, and thus it has promising application for the removal of heavy metal cations from water, soil, and sediment.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2022
·Vol. 139
·期 30
·e52685
·
IF 3.057
Fei Yu,Hengyu Feng,Jinpeng Leng,Hongying Xue,Ziyi Zhong,Zhen Yan,Xudong Liu,Yu Liu,Linghan Xiao
In regard to the nonfatal harm self-healing of natural species, microcapsule-based polymeric materials for self-healing have been considered to be highly desirable in light of their ability to heal cracks in significant volumes, leaving the original chemical structures of polymers unchanged. Accordingly, this study sought to design a one-component photo-responsive self-healing polymer composite based on Bisphenol A epoxy acrylate resin @graphene oxide microcapsules (BAEA@GOMCs) that are capable of photo-absorption in order to reduce difficulties of processing and inhomogeneous distributions of the two components. Embedding of BAEA@GOMCs were carried out in waterborne epoxy matrix, and self-healing composite coatings were generated onto surfaces of hot-dip steel via galvanization. Upon incurring mechanical damage, solidification of the agents of photo-responsive healing and the flowing the cracks were achieved as the agents were exposed to light to achieve self-healing. In addition, the solidification within the unbroken microcapsules was maintained, and there were continuous no reactions. Given the simplicity of the proposed preparation, incorporating light-absorbing particles into the microcapsule shell can further broaden the application range of the aforementioned common materials.
研究领域:
材料科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MOLECULAR MODELING
·
2015
·Vol. 21
·期 11
·1-7
·
IF 1.736
Zhao Dongxin,Lu Kui
Breast cancer susceptibility gene 2 (BRCA2)—a human tumor suppressor gene—is related to various malignancies such as breast and ovarian cancer. This gene can induce the key protein RAD51 recombinase, which is involved in homologous recombination with single-stranded DNA in the human body and can regulate RAD51 to complete the repair of damaged double-stranded DNA. Eight highly conserved BRC repeat motifs in BRCA2 protein serve as sites for the interaction between BRCA2 and RAD51. BRCA2 regulates RAD51 through these motifs. However, the mechanism of this interaction still requires further research. In this study, the BRC4 motif that demonstrated strong interaction with RAD51 was selected as template peptide. On the basis of known data regarding the crystal structure of the BRC4-RAD51(191–220) complex, a series of BRC4 mutants was designed using PyMOL software based on the sequence of BRC4, and polypeptides were synthesized by the Fmoc solid-phase method. After purification by reversed-phase high-performance liquid chromatography, the purity of the polypeptides reached >95 %. The primary determination of circular dichroism spectra showed that the polypeptides exhibited slight changes in secondary structure, which indicated that mutation on the non-conserved sites in BRC4 probably affected the interaction with BRC4. These findings will facilitate research on the interaction between targeting peptides and BRC4 mutants, as well the basic rules covering this interaction.
研究领域:
分子生物学
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结构生物学
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肿瘤学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2025
·
IF 7.3
Shuai Chen,Dennis W. Hess,Lianpeng Zhang,Xijuan Chai,Kaimeng Xu,Yulan Jian,Linkun Xie
Wood, a renewable and sustainable building material, suffers from poor durability in outdoor applications due to its hygroscopic nature. Current protective coatings often rely on energy-intensive processes or hazardous fluorinated chemicals, conflicting with the principles of green chemistry. Herein, we report a green strategy for fabricating self-healing superhydrophobic wood coatings that operate autonomously at room temperature. The coating is formed through a one-step co-condensation of octadecylamine (ODA) with methyltrimethoxysilane (MTMS) in ethanol, avoiding fluorinated compounds and external energy input for healing. The resulting surface exhibits a hierarchical micro/nano-structure, achieving an ultralow surface free energy (~6 mJ/m 2 ) and a water contact angle (WCA) exceeding 155°. After mechanical damage or severe plasma etching, superhydrophobicity is spontaneously restored within 36 h at ambient conditions. Notably, the MTMS/ODA coating demonstrates superior self-healing cyclability (43 cycles), exceptional UV stability (WCA > 140° after 936 h), and resistance to neutral/alkaline media. By significantly reducing water uptake and improving dimensional stability, this coating extends the service life of wood. This work presents a scalable, energy-efficient, and fluorine-free solution for protecting wood, aligning perfectly with the goals of sustainable construction and green materials engineering.
✓ 已验证
产品关联
DOI
高影响因子
CHINESE JOURNAL OF POLYMER SCIENCE
·
2019
·Vol. 37
·期 7
·700-707
·
IF 2.804
Zhang Zhi-Fei,Yang Kun,Zhao Shu-Gao,Guo Lai-Na
To meet the increasing demand for safe, environmentally friendly and high-performance smart materials, self-healing rubbers are highly desired. Here, the self-healing performance of ethylene propylene diene monomer rubber (EPDM) is reported, which was designed by graft-polymerization of zinc dimethacrylate (ZDMA) onto rubber chains to form a reversible ionic cross-linked network. Single ionic cross-linked network and dual network, combining covalent and ionic cross-links, could be tuned by controlling vulcanization process to achieve tailorable mechanical and self-healing properties. It was found that ionic cross-linked EPDM showed a recovery of more than 95% of the original mechanical strength through a healing process of 1 h at 100 °C. The covalent cross-links could improve mechanical properties but block self-healing. Adding 50 wt% liquid rubber to “dry” EPDM could effectively enhance self-healing capability of the dual cross-linked network and the healed tensile strength could reach 0.9 MPa. A compromise between mechanical performance and healing capability could be potentially tailored by controlling vulcanization process and liquid rubber content.
研究领域:
材料科学
·
高分子化学
✓ 已验证
DOI
高影响因子
SENSORS AND ACTUATORS A-PHYSICAL
·
2024
·
IF 4.1
Shuolei Wang,Zhonggui Zhang,Zhao Li,Ziyue Zhang,MD. Zahidul Islam,Xiaojian Jiang,Hongyu Gao,Shi Xu,Yubing Dong
The sensor fabricated from high-molecular polymer is soft, lightweight, and biocompatible; however, traditional high-molecular polymers suffer from viscoelasticity and poor cycle stability. To address these issues, it is essential to develop flexible matrix materials that can overcome viscoelasticity, ensuring high sensitivity and long-term use under large strains for next-generation wearable intelligent devices. In this study, ethylene-vinyl acetate (EVA) with a shape memory effect was utilized as the substrate for a flexible sensor，the shape memory effect of EVA can eliminate the residual strain generated by each long time of use to improve its service life. A polydopamine@reduced graphene oxide (PDA@RGO)/EVA fiber flexible strain sensor was fabricated through melt extrusion, swelling ultrasound, and in-situ polymerization techniques. The resulting sensor exhibits high sensitivity (gauge factor=1801.21), a wide strain detection range (strain = 193 %), and excellent stability and durability (2000 cycles). Notably, the PDA@RGO/EVA fiber flexible strain sensor demonstrates exceptional dual thermal and light repair functions, with light repair achieving a repair speed of 5 seconds, 100 % electrical performance repair efficiency, and perfect consistency in relative resistance response before and after repair. Furthermore, the PDA@RGO/EVA strain sensor can monitor finger and wrist movements in real-time with high accuracy, highlighting its significant potential application in the wearable technology field.
研究领域:
材料科学
·
生物医学工程
·
可穿戴技术
✓ 已验证
产品关联
DOI
高影响因子
Nanomaterials
·
2022
·Vol. 12
·期 23
·4216
·
IF 5.719
Chao Li,Huimin Guo,Ning Zhang,Yao Jin,Kai Han,Jinfeng Yuan,Zhicheng Pan,Mingwang Pan
In this article, chlorotrifluoroethylene (CTFE)-based fluorocarbon composite latexes and their coatings are successfully fabricated by an environmentally friendly preparation method based on a new multifunctional waterborne polyurethane (MFWPU) dispersion. It is worth noting that the MFWPU acts as the sole system stabilizer as well as microreactor and simultaneously endows the composite coating with excellent double self-healing performance and adhesion. Moreover, the introduction of a dynamic disulfide bond in the polyurethane dispersion entrusts the coating with excellent scratch self-healing performance. Simultaneously, carbon–carbon double bonds in the polyurethane dispersion increase the compatibility between the core polymer and shell polymer. The fluorine-containing chain segments can be distributed in the coating evenly during the self-assembly film-forming process of composite particles so that the original element composition of the worn coating surface can restore the original element composition after heating, and the coating presents a regeneration ability, which further and verifies the usefulness of the double self-healing model of the coating. Afterward, efficient recovery and durability, which are two contradictory properties of scratch self-healing polymers, are optimized to obtain a composite coating with excellent comprehensive performance. The research results regarding the composite system may provide a valuable reference for the structural design and application of waterborne fluorocarbon functional coatings in the future.Keywords:double self-healing model;multifunctional waterborne polyurethane;soap-free emulsion polymerization
研究领域:
材料科学
·
高分子化学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
·
2022
·
IF 10.753
Pingping Wang,Junli Cao,Liangang Mao,Lizhen Zhu,Yanning Zhang,Lan Zhang,Hongyun Jiang,Yongquan Zheng,Xingang Liu
The application of chemically modified biochar is a promising strategy for the remediation of contaminated (e.g., pesticides) soil. In this study, H 3 PO 4 was used to modify peanut shell to improve the remediation performance of biochar. Surface area (980.19 m 2 /g), pore volume (0.12 cm 3 /g), and the functional groups ( OH, C O, and phosphorus-containing groups) on the biochar were increased by H 3 PO 4 treatment. The sorption experimental data were well fitted by Freundlich model, while the sorption affinity ( K f ) of H 3 PO 4 modified biochar (PBC) for atrazine was 128 times greater than that of the untreated biochar (BC) in the aquatic systems. The K f values of PBC-amended soil to atrazine were increased by 13.57 times than that of single soil. The strong sorption of PBC on atrazine delayed the degradation of atrazine in soil, and the residual percentage of atrazine in soil and soil-PBC mixture were 4.90% and 71.44% at the end of 60-day incubation, with the degradation half-life increased from 13.3 to 121.6 d. The analysis of high-throughput sequencing results showed that atrazine reduced the diversity of soil microbial community, but the abundance of microorganisms with degradation function increased and became dominant species. The addition of PBC in soil accelerated the microbial remediation of atrazine stress, which may promote the soil nitrogen cycle. Therefore, amendment of atrazine contaminated soil with PBC can reduce the environmental risk of atrazine and benefit the soil microbial ecology.
研究领域:
环境科学
·
土壤学
·
微生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF BASIC MICROBIOLOGY
·
2016
·Vol. 56
·期 11
·1194-1202
·
IF 1.585
Xia Tang,Shunwen Dong,Wenjin Shi,Ni Gao,Lei Zuo,Heng Xu
This study focused on the bioremediation role of Pleurotus eryngii in different characteristics soils contaminated with nickel (Ni) and fluoranthene. The results of bioremediation experiments showed that fluoranthene had a positive effect on the growth of P. eryngii , whereas Ni exerted a negative influence. The concentration of fluoranthene significantly decreased in inoculated soil accounting for 86.39–91.95% of initial concentration in soils and 71.46–81.76% in non-inoculated soils, which showed that the dissipation of fluoranthene was enhanced by mushroom inoculating. The highest removal rates of fluoranthene in sandy loam, loamy clay, and sandy soils reached to 87.81, 86.39, and 91.95%, respectively, which demonstrated that P. eryngii was more suitable for the bioremediation of sandy soil contaminated with fluoranthene. In addition, the presence of Ni tended to decrease the dissipation of fluoranthene in inoculated soil. Higher ligninolytic enzymes activities were detected in inoculated soils, resulting in the enhanced dissipation of fluoranthene in inoculated soils. Furthermore, P. eryngii had the ability to uptake Ni (4.88–39.53 mg kg −1 ) in co-contamination soil. In conclusion, the inoculating of P. eryngii was effective in remediating of Ni-fluoranthene co-contaminated soils.
研究领域:
环境科学
·
微生物学
✓ 已验证
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）