CELLULOSE
·
2018
·Vol. 25
·期 9
·5309-5321
·
IF 3.809
Pan Ying,Liu Longxiang,Zhao Hongting
Abstract Recyclable flame retardant paper was made by constructing zinc coordinated multi-layered coatings consisting of positively charged polyethylenimine/melamine and negatively charged phytic acid. Herein, with the paper matrix as a carbon source, phytic acid was chosen as the acid source, while polyethylenimine and melamine served as the blowing agent. The successful deposition of zinc ion coordinated coating on the surface of paper fiber was confirmed by scanning electron microscopy and energy-dispersive X-ray. The weight gain of the paper (P) treated with 4 (P–4BL) and 8 (P–8BL) bilayers of coating were 5.5 and 10.1 wt%, respectively. After coordination with zinc ion, P–4BL–Zn and P–8BL–Zn were obtained with weight gains of 6.7 and 13.6 wt%, respectively. The thermal stability and flammability were evaluated by thermogravimetric analysis (TGA), horizontal burning and microscale combustion calorimeter (MCC) tests. TGA results demonstrated that the thermal stability of the treated sample was significantly enhanced at high temperature, as evidenced by the improvement of char residue at 700 °C for P–8BL–Zn to 31.6% as compared with that of untreated paper (1.6%). The P–8BL and P–8BL–Zn samples could achieve self-extinguishing in the horizontal burning test. MCC results showed that the peak heat release rate and the total heat release of P–8BL–Zn were reduced by 43 and 49% as compared to those of the untreated paper, respectively. Furthermore, the zinc ion coordinated coating displayed better in-water durability than the un-coordinated one, which made it possible recyclable flame retardant coating. Graphical abstract
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
PROGRESS IN ORGANIC COATINGS
·
2025
·
IF 7.3
Yunyun Yang,Ben Liu,Tong Zhang,Yi Wu,Peiyue Wang,Changhui Liu,Yanlong Shi,Shijie Mu
To form an intrinsic photothermal, high-strength and recyclability coating, a series of photothermal phase-change polyurethane materials which incorporates metal ions as coordination bonds was designed by polyethylene glycols of different molecular weights (6000, 8000, 10,000), diphenylmethane-4,4′-diisocyanate (MDI), zinc acetate, 1,5-naphthalenediol, p-benzoquinone dioxime, and triethanolamine (TEA). The photothermal phase-change polyurethane samples which synthesized with p-benzoquinone dioxime and 1,5-naphthalenediol as chain extenders, were named PUP-B (Li et al., 2024; Shi et al., 2021; Zhao et al., 2024 (6, 8, 10)) and PUP-N (Li et al., 2024; Shi et al., 2021; Zhao et al., 2024 (6, 8, 10)), respectively. To investigate their recyclability, these samples were dissolved and coated onto glass slides to obtain new polyurethane samples. After lighting for 420 s, the temperature of samples remained around 35–45 °C for approximately 5 min during cooling cycles, indicating excellent photothermal energy storage performance. The average maximum stress of PUP-B (10) and PUP-N (10) was 14.25 MPa and 11.96 MPa, respectively, while the average strain was 637 % and 486.44 %, demonstrating good tensile properties of the polyurethane material with PEG10K as the soft segments. The maximum water contact angle of the samples was 142.78°, indicating good hydrophobicity of the prepared samples. The recyclability, hydrophobicity, and photothermal energy storage capabilities of these materials make them suitable as green coating materials, providing new ideas for the development of aircraft anti-icing solutions.
研究领域:
材料科学
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能源科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
CHEMISTRY OF MATERIALS
·
2025
·
IF 7
Junjie Wang,Xiaoyu Dong,Haojie Qiu,Zhixiu Liu,Yufeng Kang,Jinghua Du,Xuefeng Yang,Xue-liang Li,Yunsheng Ding
The utilization of biobased polyurethanes in medical engineering is constrained by their inferior mechanical properties. A variety of strategies that aim to improve the mechanical properties of these materials have been developed to meet the specific requirements of biomedical applications. Inspired by the chemical structure of the jawbone of a marine worm called Nereis, the polymer chain can be coordinated with zinc ions to improve biobased polyurethane mechanical properties. In this study, a series of biobased polyurethanes were synthesized via a prepolymerization process involving the usage of biobased polycarbonate diol in conjunction with lysine diisocyanate and isophorone diisocyanate, followed by the addition of isophorone diamine and 2-amino-5-(2-hydroxyethyl)-6-methylpyrimidin-4-ol to complete the chain expansion along with the addition of Zn2+ for coordination. The mechanical properties (including tensile, cycling, and fatigue resistance) and biocompatibility of the biobased polyurethanes were evaluated through a series of tests. The resulting biobased polyurethane, comprising a bioinspired syngeneic structure, exhibited remarkable properties, including a tensile strength of 40.6 MPa, a toughness of 147.6 MPa/m3, and an energy recovery of 91.6%, which represents a 167% improvement in toughness compared to the biobased polyurethane without metal coordination. Furthermore, the biobased polyurethane with the syngenetic effect of hierarchical hydrogen bonding and metal coordination retains 80.2% of its strength after 300 cycles without any crack propagation. In addition, the good biocompatibility of biobased polyurethanes indicates the possibility of in vivo bioapplication, so they should have potential application in artificial ligaments.
研究领域:
材料科学
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生物医学工程
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组织工程
✓ 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
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Nano Materials
·
2025
·
IF 5.5
Fanchao Yu,Xin Wang,Pinle Zhang,Huancheng Huang,Junyu Chen,Yanhao Xu,Neng Xiong,Xinyue Nong,Xinke Yu,Xinliang Liu
Due to its remarkable advantages, such as unique multidimensional structure and excellent potential for adjustable surface chemical modification, cellulose has emerged as a highly promising triboelectric material. However, the surface of the cellulose nanofibers (CNF) is enriched with hydroxyl groups, rendering them highly hygroscopic. This property leads to a reduction in the charge density and mechanical properties of CNF materials, thus limiting their application as triboelectric materials in high-humidity environments. Therefore, in this study, an economical and straightforward ″minimally invasive intervention″ strategy was adopted. Metal ions Mx+ (such as Fe3+/Al3+) were coordinated with the hydroxyl groups in the amorphous region while causing minimal damage to the crystalline structure of cellulose as much as possible. Due to the formation of coordination bonds between the hydroxyl groups and the metal ions, the free rotation of the hydroxyl groups on the surface of cellulose was effectively restricted. Thus, it would retard the wetting rate of the cellulose surface and improve the mechanical properties and polarity of the cellulose. Compared with the pure CNF film, the mechanical properties of the Mx+-CNF films have been improved by 3.94-fold and 3.35-fold, respectively (from 32.41 to 128.81 and 108.89 MPa), and the open-circuit voltages have improved by 1.9-fold and 2.9-fold, respectively (from 15 to 23 and 36 V). Even at 90% RH, they continue to demonstrate good cyclic stability and reliability. This research provides an approach for cellulose to harvest energy in a high-humidity environment.
研究领域:
材料科学
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化学工程
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能源技术
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry B
·
2022
·Vol. 10
·期 34
·6414-6424
·
IF 7.571
Gang Guo,Jian Sun,Yi Wu,Jing Wang,Ling Yun Zou,Jun Jie Huang,Ke-Feng Ren,Cheng-Mei Liu,Zi Liang Wu,Qiang Zheng,Jin Qian
The development of broad-spectrum anti-bacterial tough hydrogels without antibiotics remains a challenge in biomedical applications. In this study, we have synthesized a novel tough anti-bacterial complex hydrogel based on Cu2+ coordination. A swollen and weak poly(acrylamide-co-4-vinylbenzyl-(trihydroxymethyl-phosphonium)chloride) (P(AAm-co-VBzTHPC)) hydrogel was prepared by the radical copolymerization of AAm and VBzTHPC monomer solutions, followed by immersion in CuSO4 solution to coordinate with Cu2+ to form a strong and tough hydrogel. Fourier transform infrared (FTIR) spectra and X-ray photoelectron spectra (XPS) were used to characterize the coordination structure between phosphorus and oxygen atoms in the VBzTHPC monomer and copper ions. The water content and mechanical properties of the obtained hydrogel varied with gel composition. The prepared toughened hydrogel exhibited excellent anti-bacterial performance because of the introduction of copper ion coordination and the slow release of copper ions, with bacterial viability of 5.1% when the mole fraction of VBzTHPC was 10 mol%. Cell viability when cocultured with the toughened hydrogel was above 85% using the Cell Counting Kit-8 (CCK-8) method, indicating the good biocompatibility of the hydrogel. Compared with the control group experiment in vivo, this tough hydrogel can also promote wound healing, making it a promising candidate for wound dressing.
研究领域:
材料科学
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生物医学工程
·
药学
✓ 已验证
DOI
PubMed
高影响因子
POLYMER TESTING
·
2021
·
IF 4.282
Kaiming Zhang,Chuanhui Gao,Jingyao Song,Chengxin Song,Zhe Wang,Yumin Wu,Yuetao Liu,Jiawen Sun
Bacterial resistance to antibiotics reduced the demand for antibiotics in the field of medical devices. Polymer antibacterial materials have shown great potential in the medical field. However, the treatment of materials after use is not environmentally friendly. Therefore, the development of dissoluble polymer antibacterial materials has become an urgent challenge. In this paper, an antibacterial polymer material with high self-healing ability and rapid dissolution is reported. The new material was formed by the Schiff base reaction and cross-linking of aldehyde group and amino in terephthalaldehyd (TA), 3,4-diaminofurazan (DAF) and α,ω-aminopropyl terminated polydimethylsiloxane (PDMS, Mn = 3000). The properties of the material were further enhanced by the coordination of zinc ion with nitrogen and oxygen atoms of 3,4-diaminofurazan. The antibacterial polymer material designed by us can be effectively repaired at 100 °C. The first repair efficiency was 89.5%. After repeated repair, its mechanical properties were not significantly reduced. E. coli and S.aureus were used to evaluate the antibacterial ability of the material. The antibacterial efficiency of the material was 99.9993% and 99.9997% respectively. This new idea solved the urgent problems in the current application, and provided guidance for the research of flexible antibacterial materials.
研究领域:
材料科学
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
CARBOHYDRATE POLYMERS
·
2024
·
IF 10.7
Hongyang Zhou,Qi He,Xuran Liu,Qianqian Jiang,Dawang Chu,Qiong Wang,Xuan Yang,Tongling Zhang,Hongkun Wang,Zhenglong Li
Cellulose has outstanding potential for application in energy storage batteries due to its high temperature resistance, high electrolyte affinity, renewability, and suppression of the shuttle effect, but single cellulose membranes still suffer from problems such as inhomogeneous pore distribution and unstable three-dimensional network structure. In this study, a green and sustainable regenerative cellulose (RC)/sodium alginate (SA) gel electrolyte membrane is developed by sol-gel process, the double crosslinked network scaffold centered on Zn 2+ was constructed by the synergistic hydrogen-bonding and metal ion- coordination network, the stable and uniform pore structure was also formed. The obtained RC-SA gel electrolyte membrane exhibits outstanding performance, featuring a dual crosslinked network with abundant pore structure and numerous polar groups that effectively enhance Zn 2+ transport, significantly improving battery cycling performance. The corresponding RC-SA gel electrolyte membrane demonstrates high ionic conductivity (6.30 mS·cm −1 ) and Zn 2+ transference number (0.66), leading to excellent reversible capacity (159 mA·h·g −1 ) and self-discharge suppression capability (maintaining 99.2 % of capacity after a 24 h standstill) in Zn//V 2 O 5 full-cell. The coulombic efficiency and cycling stability of the Zn//Cu half-cell and Zn//Zn symmetric cell using RC-SA gel electrolyte membrane outperforms that of the glass fiber separator, highlighting its multifunctionality and potential applications.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2025
·
IF 3.9
Chaobo Jiang,Haonan Yan,Ce Wang,Shilong Zhang,Yanling Zhu,Hua Deng,Yongsheng Zhao,Guangcheng Zhang
The incorporation of dynamic covalent bonds (DCBs) has transformed thermoplastic elastomers into vitrimers. However, it still remains a challenge to solve the trade-off between mechanical properties and processability of vitrimer-like elastomers. In this work, poly(styrene–butadiene-styrene) (SBS) vitrimer with dual dynamic networks were prepared through thiol–ene click chemistry and reactive processing. By grafting 3-mercaptopropionic acid (MPA) onto SBS and subsequent cross-linking with zinc oxide and BDB, dynamic networks with zinc ion(Zn2+) coordination and dynamic boronic ester bonds were established. The structure and mechanical performance could be tailored by adjusting the ratio of the two networks. When increasing Zn2+ coordination bonds along with fixed BDB content, the gel content of SBS vitrimers varies from 30.62% to 69.54%. The dual-network sample demonstrated a synergistic effect with the highest elongation at break (526.41%) and a tensile strength of 13.40 MPa, outperforming single-network samples. All the SBS vitrimers show Arrhenius-type stress relaxation behavior, and the activation energy for dynamic bond exchange energy (Ea) of SBS with dual dynamic network was 76.69 kJ/mol. After three reprocessing cycles, the elastomer retained over 80% of its original mechanical properties. Therefore, this work offers a promising strategy for fabricating elastomers with excellent mechanical performance and recyclability, which is expected to have a significant impact on the design and preparation of high-performance elastomers.
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
LANGMUIR
·
2024
·
IF 3.7
Yirong Fan,Hui Sun
The morphological control and transformation of soft nanomaterials are critical for their physical and chemical properties, which can be achieved by dynamically regulating the hydrophilicity of amphiphilic polymers during self-assembly. Herein, an amphiphilic homopolymer poly(N-(2,2′-bipyridine)-4-acrylamide) (PBPyAA) with bipyridine pendants is synthesized, and the effect of various parameters including initial concentration, temperature, pH, and metal ion coordination on the self-assembly behavior and morphology of the assemblies is investigated. Upon changing the initial concentration of PBPyAA, bowl-shaped nanoparticles (BNPs) with precisely controlled diameter, opening size, and thickness are obtained. With the decrease of pH of the solution, the negatively charged surface of BNPs transforms to a positively charged state. Furthermore, the addition of divalent metal ions (Co2+, Mn2+, and Zn2+) induces the transformation of BNPs to vesicles and giant vesicles. The effect of the above factors on the morphology of the assemblies is essential to change the hydrophilicity of PBPyAA dynamically, leading to variation of the local viscosity during self-assembly. Overall, manipulation of the structural parameters of BNPs and transformation of BNPs to vesicles are achieved, providing fresh insights for the precise control of the morphologies of soft nanomaterials.
研究领域:
材料科学
·
化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2020
·
IF 7.183
Lei Bian,Cong Shen,Chenyang Song,Shuai Zhang,Zhenyu Cui,Feng Yan,Benqiao He,Jianxin Li
In this work, three types of hollow fiber loose nanofiltration membranes (LNFs) with different compactness in an “outside-in” mode were prepared via “chemical crosslinking and metal ion coordination”. The formation and evolution in the microstructural regularity of three types of separation layers (G-PEI, M-PEI and C-PEI) are expounded. The compactness of a separation layer can be effectively tailored by combining chemical cross-linking with metal ion coordination on the membrane surface (achieving mean pore sizes as small as 1.2 nm). The three as-prepared membranes can effectively reject dyes with different molecular weights, 99.5% acid red 27 for G-PEI, 99.3% sunset yellow for M-PEI and 96.1% crystal violet for C-PEI maintaining high flux (41.8, 31.2, and 28.7 L m –2 h –1 bar –1 , respectively). The size sieving decolorization mechanism of the membranes was demonstrated from the relationship between the pore sizes of the LNFs and the “hydration, aggregation and absorption” process of dye molecules. In addition, the as-prepared membrane displayed excellent anti-bacterial performance and good stability in the long-term separation of dye/salt system. This work provides a new idea in fabricating hollow fiber LNFs with the separation layer with adjustable microstructure.
研究领域:
材料科学
·
环境工程
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
INORGANIC CHEMISTRY
·
2021
·
IF 5.165
Yanhong Zhu,Zhongkui Li,Wenjing Song,Maroof Ahmad Khan,Hui Li
The conformation of the pentose ring in nucleotides is extremely important and a basic problem in biochemistry and pharmaceutical chemistry. In this study, we used a strategy to regulate the conformation of pentose rings of nucleotides via the synergistic effect of metal-ion coordination and π–π stacking. Seven types of coordination complexes were developed and characterized using Fourier transform infrared spectroscopy, elemental analysis, thermogravimetric analysis, powder X-ray diffraction, ultraviolet–visible spectroscopy, 1H nuclear magnetic resonance spectroscopy, electrospray ionization mass spectrometry, and single-crystal X-ray diffraction. On the basis of two conformational parameters obtained from single-crystal structure analysis, i.e., the pseudorotation phase angle and degree of puckering, the exact conformation of the furanose ring in these coordination polymers was unequivocally determined. Crystallographic studies demonstrate that a short bridging ligand (4,4′-bipyridine) is conducive to the formation of a twist form, and long auxiliary ligands [1,2-bis(4-pyridyl)ethene and 4,4′-azopyridine] induce the formation of an envelope conformation. However, the longest auxiliary ligands [1,4-bis(4-pyridyl)-2,3-diaza-1,3-butadiene] cannot limit the flexibility of a nucleotide. Our results demonstrated that the proposed strategy is universal and controllable. Moreover, the chirality of these coordination polymers was examined by combining the explanation of their crystal structures with solid-state circular dichroism spectroscopy measurements.
研究领域:
生物化学
·
药物化学
·
晶体学
✓ 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）