Journal of Materials Chemistry A
·
2025
·
IF 9.5
Lin Wang,Manman Jia,Hui Jiao,Shukang Ti,Dongmei Yue
Nitrile Butadiene Rubber (NBR) is widely used in aerospace, petroleum exploration, auto parts, and other fields because of its excellent performance. Nevertheless, NBR usually needs to be crosslinked with sulfur or peroxide, which restricts the tensile performance and recyclability of NBR. Herein, a novel strategy was developed to address these issues by introducing dynamic urea bonds into the main chain using a simple, catalyst-free one-pot method. The presence of urea bonds not only provides a large number of hydrogen bonding sites between the molecular chains but also exhibits the remarkable microphase separation properties of thermoplastic elastomers. This approach endows NBR with enhanced dynamic characteristics and significant recyclability. As a result, the as-synthesized multifunctional NBR elastomer (I–A0.5–P0.5) exhibits excellent tensile strength (19.9 MPa), toughness (93.7 MJ m−3), low glass transition temperature (−52 °C), and low compression cold resistance coefficient (0.15 at −55 °C), which are comparable to those of conventionally covalently crosslinked NBR. Importantly, the elastomer can retain its mechanical robustness, chemical structure, and thermal stability after multiple rounds of recycling (after five times of recycling, with a recovery of more than 81%). To broaden the application of NBR products, I–A0.5–P0.5 was crosslinked with sulfur, and its performance was compared with NBR vulcanizates of different acrylonitrile contents. It shows excellent oil resistance and low temperature resistance. Surprisingly, it can also possess the ability to be reprocessed multiple times. This new multifunctional thermoplastic NBR elastomer is of great significance in solving the problem of difficult recycling of traditional NBR and is expected to replace traditional covalently cross-linked NBR.
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
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Yan-Fang Xiao,Xiao-Feng Liu,Feng-Ming He,Song Gu,Yu-Zhong Wang,Li Chen
To ameliorate the inherent deficiencies of epoxy resins (EP) and to achieve flame-retardant EP with comprehensive performance for versatile applications, a phosphorus-containing polyester named PEDP with rigid-flexible spacers and bis-phosphaphenanthrene pendants was designed, prepared and successfully applied to EP as polymeric flame retardant with multifunctionalities. The obtained EP-PEDP thermosets did not show phase separation to achieve a high dispersion of PEDP and enhanced interaction between two components, which effectively improved the mechanical properties of the thermosets. EP-PEDP displayed excellent toughness, with impact toughness, fracture toughness K IC and G IC reaching 30.9 kJ·m −2 , 1.27 MPa·m 1/2 and 0.67 kJ·m −2 , respectively, showing 166.4 %, 28.3 %, and 59.5 % greater than neat EP; yet tensile and flexural strength also increased rather than sacrificed. The combined flame-retardant action of PEDP in gaseous and condensed phases effectively improved the self-extinguishment and greatly suppressed the release of smoke and heat during burning to achieve high fire safety of EP-PEDP. In addition, EP-PEDP also possessed high glass transition temperature, satisfactory thermal stability, transparency with UV shielding capacity, as well as good dielectric and thermomechanical properties. The design and synthesis of this multifunctional phosphorus-containing polyester with a rigid-flexible integrated nature, which integrates mechanical enhancement, serves as a promising polymeric flame retardant for high-performance EP to meet diverse requirements.
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
CARBON
·
2019
·
IF 7.466
Sishi Long,Yunchao Feng,Faliang He,Shuaishuai He,Huachi Hong,Xuerui Yang,Lingling Zheng,Jian Liu,Lihui Gan,Minnan Long
Compressible and ultralight carbon aerogels are attractive due to its compressibility , elasticity and conductivity. However, it is still a great challenge to enrich the properties of carbon aerogel to meet various requirements. Herein, we report an untralight, supercompressible, fatigue resistant, superhydrophobic and fire-resistant and multifunctional CNF-GO/glucose-kaolin carbon aerogel (C-NGGK) carbon aerogel. To achieve such excellent performances, calcined GO , CNFs , glucose and kaolin are used for forming low-density and continuous wave-shape rGO layers, reinforcing the mechanical strength of carbon layers , realizing superelasticity and fatigue resistance and resulting in a superhydrophobic surface for C-NGGK, respectively. The as-prepared C-NGGK demonstrates excellent superhydrophobicity with the water contact angle (WCA) of 124.9°, and the absorption efficiency of the C-NGGK samples for different oils and organic solvents are 75–255 times their own weight. These advantages show that the C-NGGK can be an ideal candidate for oil/water separation. In addition, there is also the prospect to be used for pressure sensors , while other potential applications include three-dimensional electrode materials for supercapacitors and batteries , catalyst carriers and various wearable devices .
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 Magnesium and Alloys
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2020
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IF 7.115
Lingjie Li,Xia Li,Jinlong Chen,Lei Liu,Jinglei Lei,Nianbing Li,Gao Liu,Fusheng Pan
The robust magnesium surfaces with multi-functions are highly desirable, and the simple and scalable methods to construct such surfaces are urgently indispensable. Herein, we conducted a one-step spraying method to facilely fabricate the robust coating with multi-functions on magnesium alloys. The as-sprayed magnesium alloys surface is superhydrophobic with a static water contact angle (WCA) of 157.0° and a roll-off angle of 6.0°. Such surface has excellent mechanical, chemical and thermal stabilities, even undergoing various physical and chemical damages, including sand impact (10 g min −1 , ≥20 min), water impact (2 impacts s −1 , ≥ 180 min), abrasion (1.00 kPa, ≥25 cycles), peeling (≥2.15 kPa), high temperature (200 °C, ≥24 h), strong acidic/salty/basic media (pH = 1∼13) and organic-solvent immersion (ethanol and n-hexane, ≥24 h), demonstrating brilliant robustness. Notably, the surface displays multi-functions of corrosion protection, anti-fouling and heat insulation, which will undoubtedly promote the much wider applications of magnesium alloys.
研究领域:
材料科学
·
表面工程
✓ 已验证
产品关联
DOI
高影响因子
ENVIRONMENTAL SCIENCE & TECHNOLOGY
·
2016
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IF 5.393
Xiaolin Zhang,Jieshu Qian,Bingcai Pan
Efficient and powerful water purifiers are in increasing need because we are facing a more and more serious problem of water pollution. Here, we demonstrate the design of versatile magnetic nanoadsorbents (M-QAC) that exhibit excellent disinfection and adsorption performances at the same time. The M-QAC is constructed by a Fe3O4 core surrounded by a polyethylenimine-derived corona. When dispersed in water, the M-QAC particles are able to interact simultaneously with multiple contaminants, including pathogens and heavy metallic cations and anions, in minutes. Subsequently, the M-QACs along with those contaminants can be easily removed and recollected by using a magnet. Meanwhile, the mechanisms of disinfection are investigated by using TEM and SEM, and the adsorption mechanisms are analyzed by XPS. In a practical application, M-QACs are applied to polluted river water 8000-fold greater in mass, producing clean water with the concentrations of all major pollutants below the drinking water standard of China. The adsorption ability of M-QAC could be regenerated for continuous use in a facile manner. With more virtues, such as low-cost fabrication and easy scaling up, the M-QAC have been shown to be a very promising multifunctional water purifier with rational design and to have great potential for real water purification applications.
研究领域:
材料科学
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环境科学
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Soft Matter
·
2021
·Vol. 17
·期 41
·9399-9409
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IF 3.679
Hui Jie Zhang,Xinyi Wang,Lini Wang,Tao Lin Sun,Xugang Dang,Daniel R. King,Xiangyu You
Biopolymer-based functional hydrogels with excellent mechanical properties are desired, but their fabrication remains a challenge. Learning from the tofu-making process, we developed a freely formable hydrogel with high toughness and stiffness from the hydrogen bond-rich coacervation of tannic acid and gelatin through a simple hot-pressing process that transforms the coacervate particles into a bulk hydrogel. The mechanical properties of the obtained gelatin/tannic acid hydrogel (G/T gel) can be controlled by tuning the weight ratio of tannic acid to gelatin in the gel. The G/T gel with optimum mechanical properties possesses high Young's modulus, fracture strain, and fracture energy of ∼60 MPa, ∼10, and ∼24 kJ m−2, respectively. These properties arise from the phase-separated structure and high concentration of dynamic hydrogen bonds with widely distributed bond strengths. These dynamic hydrogen bonds also enable multifunctional properties of the gel, such as self-recovery, self-healing, rebuildability and shape memory. The combination of excellent mechanical properties, good biocompatibility, and useful functionalities into one hydrogel that comes from renewable sources demonstrates the great potential of G/T gels.
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
PubMed
高影响因子
Coatings
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2024
·Vol. 14
·期 9
·1098
·
IF 2.9
Xu Cui,Mengying Guo,Sensen Han,Shuangshan Li,Yin Yu,Yanxi Zhang,Qingshi Meng
Porous composites possess distinctive structural features and performance advantages, making them promising for applications in various domains such as sensing, energy storage, and acoustics. A simple, efficient, and environmentally friendly method was employed to prepare porous polyurea materials, which were then modified with graphene nanosheets. The resulting graphene/polyurea porous composites demonstrated enhanced mechanical properties, with a 35.04% increase in tensile strength at a graphene content of 5 wt%. These composites exhibited exceptional multifunctionality, achieving a specific capacitance of 35.74 F/g when used as capacitor electrodes. Additionally, they displayed high sensitivity to resistance and capacitance changes under various mechanical loads, such as tensile, torsional, and bending stresses, with a resistance change rate of 57.72% under 180-degree torsion, highlighting their potential as resistive and capacitive sensors. Compared to traditional materials, the multifunctional composites maintained a resistance change rate below 40% and a capacitance retention rate above 95.07% after 10,000 cycles, underscoring their durability and reliability. Moreover, the developed graphene/polyurea porous composites exhibited good corrosion resistance and an impressive sound absorption rate of 30.68% for high-decibel noise, reducing environmental limitations for their applications. These properties position the composite as a durable, high-sensitivity, multifunctional material with significant potential in sensing, energy storage, and noise reduction applications.
研究领域:
材料科学
·
能源技术
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传感器技术
·
声学工程
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL CROPS AND PRODUCTS
·
2024
·
IF 5.6
Huiyu Jiang,Wei Zeng,Xiaodong Hu,Yaojun Tan,Geao Liu,Wen Zhang,Bingyan Li
The textile industry faces a significant challenge in dyeing cotton fabrics due to their low affinity for anionic dyes, leading to substantial dye wastage and reliance on inorganic salts that harm the environment. This issue is particularly pressing for blue dyes, which are in high demand but less abundant in natural forms compared to red and yellow dyes. In response, this study presents an eco-friendly method for synthesizing a biobased cationic blue dye capable of forming covalent bonds with oxidized cotton, resulting in durable coloristic and multifunctional fabrics. Bio-based polylysine (PLL) was crosslinked with genipin (GNP) to produce a stable cationic blue dye (PLL-GNP). This dye was then applied to oxidized cotton fabric, achieving covalent bonding through a Schiff base reaction. The optimized conditions for the blue dye synthesis included pH 7, a mass ratio of PLL to GNP of 6:4, and a reaction time of 120 min. The oxidized cotton fabric exhibited acceptable adsorption capacity for the blue dye, achieving an exhaustion of 34 % and an adsorption quantity of 134 mg/g at a concentration of 4 g/L without the need for inorganic salts or alkalis. Under these conditions, the dyed cotton fabric exhibited a surface color depth ( K / S value) of 6.8. Color fastness tests revealed strong resistance to washing and rubbing, though lightfastness remains an area of concern. The application of PLL-GNP not only imparted a stable blue color but also enhanced the fabric’s functionality, providing UV protection (UPF 30), antioxidant activity over 75 %, and antibacterial activity against E . coli and S . aureus exceeding 95 %, all maintained even after multiple washes. This research addresses the urgent need for blue dyes in the textile industry, offering a sustainable and multifunctional dyeing solution that supports the broader adoption of biobased materials.
研究领域:
纺织科学
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生物化学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
MOLECULES
·
2013
·Vol. 18
·期 11
·13910-13919
·
IF 2.428
Wen-Jian Xia,Zong-Bo Xie,Guo-Fang Jiang,Zhang-Gao Le
An environmentally-friendly, enzyme-promoted procedure for the Henry reaction was first studied using water-in-[Bmim][PF6] microemulsions as reaction medium. The Amano acylase fromAspergillus oryzaeshowed better catalytic activity for the addition reactions of nitromethane with a series of aromatic aldehydes, and a highest yield of 90% was obtained.Keywords:Henry reaction;acylase;water-in-[Bmim][PF6] microemulsion;enzyme promiscuity
研究领域:
生物化学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2019
·
IF 3.45
Shumin Liu,Tailong Cai,Xiaoyuan Shen,Erzhuo Huang,Zhe Wang,Qingfeng Sun
Sand as a kind of natural material exists abundantly in desert has not been effectively utilized because of its superhydrophilicity. In this study, the superhydrophobic sand particles were successfully fabricated by structuring mussel-inspired polydopamine and TiO 2 coatings on sand surfaces and subsequent hydrophobic modification with low surface energy material. The water droplets stood on the superhydrophobic sand surfaces with an almost perfect sphere (water contact angle of ~153°), which broke the conventional concept towards the superhydrophilicity of sand. Furthermore, the obtained superhydrophobic sand particles had good water-holding capacity and high thermal stability, which contributed to the storage of water in desert. Meanwhile, the superhydrophobic sand exhibited a multifunctionality including oil/water separation, anti-icing properties and waterproof coating on fiberboards, which widened the application fields of desert sand and provided fast access to sustainable development of environment and natural resource.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Shuai Zhang,Kuanjun Fang,Xiuming Liu,Dongdong Liu,Xiran Qiao,Jinkun Wang,Fuyun Sun
The variety of colors in clothing is not satisfying the demand for textile performance. It is still a challenge to efficiently construct multifunctional colored cotton fabrics with durability. Here we report a convenient process to prepare multifunctional colored cotton fabrics with hydrophobic and UV resistant properties via self-curing raspberry-shaped colored nanospheres and PMHS. The synthesized silica/disperse dye nanospheres (SiO 2 @DPBA) effectively avoid the leakage of disperse dyes. SiO 2 @DPBA nanospheres with well monodispersity have excellent color performance that can be directly sprayed on cotton fabrics to obtain a good color depth. In order to further improve the color fastness and durability of cotton fabric, a transparent hydrophobic coating was constructed on the surface of the cotton fabric using PMHS. Ultimately, the colored cotton fabric achieved 140.2° hydrophobic angle and UPF value (200 + ), and exhibited good mechanical and chemical stability under various environmental conditions. Thus, the synergistic interaction of colored nanoparticles and PMHS provides an easy and feasible approach for the fabrication of multifunctional dyed textiles.
研究领域:
纺织科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
LANGMUIR
·
2023
·
IF 3.9
Wenhao Yang,Wangyi Zeng,Liang Chai,Yanxin Jiang,Longjiang Deng,Guang Yang
Corrosion resistant, durable, and lightweight flexible strain sensor with multiple functionalities is an urgent demand for modern flexible wearable devices. However, currently developed wearable devices are still limited by poor environmental adaptability and functional singleness. In this work, a conductive fabric with multifunctionality in addition to sensing was successfully prepared by assembling zero dimensional silver nanoparticles (AgNPs) and one-dimensional carbon nanotubes (CNTs) layer by layer on the surface of the elastic polypropylene nonwoven fabric (named PACS fabric). Polystyrene-block-poly(ethylene-co-butylene)-block-polystyrene (SEBS) added as binder materials favored strong interaction between conductive fillers and the fabric. Benefiting from the synergistic interaction among the conductive fillers with different dimensions and the fabric, the strain sensor based on the conductive fabric showed high sensitivity (GF up to 8064), wide detection range (0–200%), and excellent stability and durability (more than 10000 stretch–release cycles). Besides, the prepared conductive fabric showed superhydrophobicity (water contact angle = 154°) with excellent durability. This ensured the performance stability of the fabric sensor in harsh environments. At the same time, the fabric also showed excellent photothermal conversion performance (90 °C at a power density of 0.2 W/cm2 within 20 s). The PACS fabric strain sensor proved excellent performance and environmental adaptability, revealing great potential to be applied in human motion monitoring, self-cleaning, biomedicine, and other fields.
研究领域:
材料科学
·
柔性电子
·
传感器技术
✓ 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）