COMPOSITES SCIENCE AND TECHNOLOGY
·
2023
·
IF 9.1
Jianfeng Fan,Chunyu Wong,Weijian Wu,Yu Zhou,Shengchang Ding,Linfeng Cai,Zhibin Wen,Rong Sun,Xiaoliang Zeng,Linlin Ren
Due to the different coefficients of thermal expansion between the heat generation and heat dissipation units, the applications of soft high filled composite gels as thermal interface materials require both high stretchability and excellent resilience. However, high stretchable composite gels reported far usually contain sacrificial species to dissipate energy, thus compromising their resilience. Herein, a soft (0.13 MPa), stretchable (172%), and resilient (>70%) composite gel with ultrahigh filler loading (90 wt %) is developed. The stretchability and resilience are realized by lengthening free polymer strands to form appropriate entanglements , in which the loose entanglements transfer the applied force into a large area and the stiff crosslinks prevent the entanglements from disentangling. In additional, the reversible elasticity of the filler network also dictates the resilience, so delaying its deconstruction allows for excellent resilience. The ultrahigh filler loading also endows the composite gel with high thermal conductivity (4.04 W·m −1 ·k −1 ), and the potential of the as-prepared composite gel for a TIM is discovered.
研究领域:
材料科学
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热管理技术
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产品关联
DOI
高影响因子
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
·
2022
·
IF 9.463
Fan Xie,Kun Gao,Longhai Zhuo,Fengfeng Jia,Qin Ma,Zhaoqing Lu
In this contribution, we demonstrated an efficient approach for constructing conductive aramid nanofibers based porous architectures by graphene oxide and Ti 3 C 2 T x via freeze drying and subsequent thermal reduction. Specifically, the aramid nanofibers laid the foundation for mechanical enhancement and good electrical conductivity of Ti 3 C 2 T x and RGO ensured outstanding electromagnetic shielding ability. The resultant Ti 3 C 2 T x /RGO/ANFs hybrid aerogel presented a spongy structure, which was conducive to the dissipation of incident electromagnetic waves through multiple reflection and scattering. The electromagnetic shielding efficiency reached 54.8 dB in X-band (8.2–12.4 GHz) with 25 wt% loading content of Ti 3 C 2 T x . When the addition amount of Ti 3 C 2 T x was 5 wt%, the optimum compressive stress of Ti 3 C 2 T x /RGO/ANFs hybrid aerogel reached 200 kPa under 70% strain with a relatively low density of 0.062 g/cm 3 . This work provided a feasible approach to fabricate robust hybrid aerogel with excellent electromagnetic shielding performance and compression resilience.
研究领域:
材料科学
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电磁学
✓ 已验证
DOI
高影响因子
MACROMOLECULAR MATERIALS AND ENGINEERING
·
2021
·Vol. 306
·期 8
·2100184
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IF 4.367
Chengjie Li,Zun Yuan,Lin Ye
In view of the facile reaction between carboxyl groups and zinc oxide (ZnO), Zn 2+ -carboxyl salt-bonding is constructed in ethylene propylene diene monomer (EPDM) rubber system by grafting reaction of glutamic acid (Glu), serving as sacrificial unit endowed EPDM-g-Glu/ZnO sample with excellent reprocessing and recycling ability. Through reaction of ZnO/methacrylic acid (MAA), EPDM-g-Glu/zinc dimethacrylate (ZDMA) composite is further prepared by in situ formation of ZDMA, and ZDMA is rapidly polymerized to form poly-ZDMA (PZDMA) containing massive Zn 2+ -carboxyl ion pairs once vulcanized, which exhibits fuzzy interface with the matrix. Relative to EPDM/ZDMA, the higher polymerization degree of ZDMA is achieved with the reduction of the size of PZDMA clusters, demonstrating the improvement of interfacial bonding, which results in the formation of a developed crosslinking network structure for EPDM-g-Glu/ZDMA. The mechanical strength, fracture toughness, and hysteresis loss of EPDM-g-Glu/ZDMA-40% show a significant increase in comparison with EPDM/CB-40% and EPDM/ZDMA-40%, meanwhile the relatively lower compression set and slower contact stress relaxation are achieved by energy dissipation mechanism of preferential rupture of Zn 2+ -carboxyl salt-bonding before breakage of covalent bonds during compression aging process, revealing the effective enhancement of durable sealing resilience performance.
研究领域:
材料科学
·
高分子化学
✓ 已验证
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2019
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IF 6.97
Guannan Li,Chen Zou,Yuyuan Sun,Wei Fan,Xiaoting Ma,Jiawei Tao,Ping Li,Yan Xu
Increasing interest in aerogels among industrial sectors and the scientific community has sparked a sustained effort to develop methodologies for rational organization of aerogels for broader applications. Here we demonstrate that anisotropically compression-resilient cellulose/silica aerogels with tailorable macropores can be realized through guided self-assembly and controlled mineralization of bacterial cellulose. The cellulose/silica aerogels replicate the mesostructural features of modified bacterial cellulose with the macropores tailored during the biosynthesis using polystyrene spheres. Silica deposition surrounding bacterial cellulose nanofibers is controlled by moderating the hydrolysis and polycondensation of tetrapropoxysilane in the presence of cetyltrimethylammonium bromide. Cellulose/silica withstands 100 cycles with almost 100% height recovery along the growth direction and 1 cycle with 86.2% height recovery perpendicular to the growth direction at 60% compression strain. The anisotropic compression resilience is attributed to a multiscale deformation involving silica nanoparticles size, bead-on-string nanostructure, and oriented mesostructure of wavy fibers with cellular pores. The potential of the cellulose/silica aerogels for oily water cleansing is illustrated. Our work opens up new possibilities for bacterial cellulose-based advanced materials through in vivo mesostructure engineering and controlled mineralization.
研究领域:
材料科学
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生物工程
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产品关联
DOI
高影响因子
Materials
·
2022
·Vol. 15
·期 9
·3069
·
IF 3.748
Yitian Li,Anran Guo,Xiaojing Xu,Yunjia Xue,Liwen Yan,Feng Hou,Jiachen Liu
Fibrous porous materials are one of the most commonly used high-temperature insulation materials because of their high porosity and low thermal conductivity. Due to their wide applications in the aerospace and energy industries, the investigation of high-elastic thermally insulating porous materials has attracted increasing attention. In order to improve the elasticity of fibrous porous materials, quartz fibers with high aspect ratio were used as matrix, sodium hexametaphosphate (SHMP) was selected as dispersant. We innovatively reported that a unique three-dimensional skeleton structure was constructed by adjusting the dispersion of fibers in the slurry, and the lightweight, thermal insulating and elastic SiO2fibrous porous material was then prepared by the compression molding method. The characterization results of zeta potential and absorbance showed that the addition of SHMP was an effective method to enhance the dispersibility of quartz fibers in the slurry. SiO2fibrous porous materials with 0.4 wt% SHMP content exhibited an ideal three-dimensional skeleton structure, which endowed the porous material with high porosity (89.39%), low density (0.04751 g/cm3), and low thermal conductivity (0.0356 W·m−1·K−1). The three-dimensional skeleton structure formed by overlapping fibers with high aspect ratios endowed the porous material with excellent elasticity. SiO2fibrous porous materials with 0.4 wt% SHMP content could undergo large strains of 30% and achieved a resilience ratio of 81.69% under the 30th compression cycle. Moreover, after heat treatment at 800 °C, SiO2fibrous porous materials also maintained good elasticity with a resilience ratio of more than 80%.Keywords:quartz fibers;sodium hexametaphosphate dispersant;porous materials;thermal insulation;compression resilience
研究领域:
材料科学
·
热能工程
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2025
·
IF 6.2
Yumin An,Jiabao Xu,Mingyao Song,Liwen Yan,Libin Zhao
In this work, a (Ce 0.2 Sm 0.2 Gd 0.2 Nd 0.2 Y 0.2 ) 2 Zr 2 O 7 -ZrO 2 ceramic fiber aerogel was successfully prepared by combining airflow spinning and high-temperature pyrolysis method using rare earth carbonates as raw materials. XRD, TEM, and EDS analyses showed that the (Ce 0.2 Sm 0.2 Gd 0.2 Nd 0.2 Y 0.2 ) 2 Zr 2 O 7 -ZrO 2 ceramic fiber aerogel exhibited a composite structure of defective fluorite and cubic zirconia phases after heat treatment at 1200 °C, with a uniform distribution of rare earth elements. The aerogel was able to achieve excellent compression resilience when compressed in liquid nitrogen, room temperature and alcohol lamp flame. In addition, the thermal conductivity of (Ce 0.2 Sm 0.2 Gd 0.2 Nd 0.2 Y 0.2 ) 2 Zr 2 O 7 -ZrO 2 ceramic fiber aerogel was about 31.9 mW·m -1 ·K -1 at room temperature, and the ceramic fiber aerogel could reduce the high temperature of 1200 °C to about 323 °C with 10 mm thickness and remain stable. The infrared reflectance of the ceramic fiber aerogel after heat treatment at 1000 °C is 91.7%, which demonstrates excellent thermal radiation shielding capability.
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产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2025
·
IF 3.9
Chen Yu,Sun Junchao,Li Yongxu,Wang Yubao,Shi Shaofeng,Jiang Jing,Wang Hongzhen,Cao Lan
Developing polyurethane foams (PUF) with superior water absorption and retention remains challenging due to insufficient understanding of structure-–property relationships. This study systematically regulates the water content gradient (as blowing agent) in all-water-foamed PUF to optimize physicochemical properties. Comprehensive characterization via SEM, contact angle, water absorption, retention, and resilience tests reveals that water content critically governs microcellular architecture, surface hydrophilicity, and their synergistic effects on water management. The optimized formulation (2.5 phr water) achieves exceptional performance: 421.73% water absorption, 76.31% retention, and 55.10% resilience. These enhancements originate from uniform cell structures that harmonize hydrophilic group distribution with mechanical integrity. This work establishes fundamental guidelines for designing eco-friendly PU foams with balanced resilience and hydroscopic functionality, validated through theoretical and experimental insights.
研究领域:
材料科学
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高分子科学
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化学工程
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL CROPS AND PRODUCTS
·
2024
·
IF 5.6
Mingyuan Liu,Yue Zhang,Ying Liu,Shu Yang,Yansong Liu,Weijia Wang,Zhen Li,Wendi Liu,Liming Wang,Yanping Liu,Xiaohong Qin
Multifunctional aerogels constructed from natural waste biomass have attracted great attention in the fields of green energy harvesting, flexible wearable sensing and natural environment restoration. However, the complex and polluted extraction of natural materials and the poor mechanical property have seriously hindered the development of natural material-based aerogels . Hence, a novel aerogel with capabilities of high-elasticity, stabilized constructions and weightlessness was prepared via waste flax staple fibers (simply physically disrupting) and multi-walled carbon tubes. Due to the assistance of cross-linking agent and carbon tubes, the aerogel was endowed with multiple properties including high photothermal conversion (97.2 %), superstability at the wide range of 0–29 KPa and outstanding compression resilience at different strains (up to 60 % and 100 cycles). Consequently, it is promising that the fabricated aerogel may be as a piezoresistive sensor to monitor different locations of the body for continuous detection of motor behavior. Further, the sample was also utilized as an evaporator with excellent water evaporation effect (1.93 kg·m −2 ·h −1 ) under 1 sun and to efficiently purify various types of wastewater for obtaining pure water. This multi-purpose aerogels prepared in this work display admirable potential for efficient environmental purification, advanced smart materials and green energy harvesting.
研究领域:
材料科学
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环境科学
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生物医学工程
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产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Han Han,Guangying Huang,Xilai Yan,Shibo Han,Jie Xie,Hongshen He,Ajoy Kanti Mondal,Weijie Lin,Fang Huang
Polyurethane (PU) can be synthesized by replacing petrochemical polyols partially with lignin, thus improving the environmental benefit and the comprehensive performance of the foam. Herein, sulfomethylated Kraft lignin (SKL) is obtained by sulfonation of Kraft lignin (KL), and then it is used as filler to synthesize the sulfomethylated lignin-based flexible polyurethane foam (SLFPUF). The effects of SKL with different sulfonations on SLFPUF are explored. Thermogravimetric (TG) analysis shows that when the sulfonation is 0.286 mmol/g, the residual mass is 12.63 % that is higher (3.35 %) compared to the control group lignin-based flexible polyurethane foam (LFPUF), indicating better thermal stability. The support factor (SF) of SLFPUF-0.286 is 4.99, higher than that of LFPUF (1.89), showing good softness. The air flow of SLFPUF-0.286 is 756.9 Pa, lower than that of LFPUF (996.8 Pa), demonstrating good comfort. Moreover, the resiliency of SLFPUF-0.286 is 9.67 %, exhibiting a shape memory property, which has potential applications in the production of functional products with low resilience.
研究领域:
高分子科学
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材料工程
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化学合成
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环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2025
·
IF 19
Juan Tian,Zhenwei Zhou,Xiangyu Miao,Shoubin Wang,Yongqiang Ming,Yijing Nie,Yuanchi Ma,Zhibo Li
The structure and density of hydrogen bonds in thermoplastic poly(urethane urea) (TPU) elastomers play a pivotal role in determining their microscopic structures and macroscopic thermomechanical performances. In this context, the syntheses and characterizations of a class of poly(caprolactone) (PCL)-based TPU elastomers containing acylsemicarbazide (ASCZ) groups that afford densely packed hydrogen-bonding arrays are reported. Benefiting from the strong intermolecular interactions, these TPU elastomers display ultimate engineering stress and elongation up to 70 MPa and 1100%, respectively, and therefore considerable toughness of 260 MJ m −3 . Meanwhile, crystallization of PCL segments in the elastomers is strongly suppressed by the hydrogen-bonding arrays, giving rise to their good elasticity at strains as high as 1000%, superior to nearly all polyester-based TPU analogs. With identical hard segment content, fine-tuning of the hydrogen-bonding density via the chain extender chemistry leads to divergent upper working temperatures and healing rates, despite uniformly superb ultimate strength, elongation at break, toughness, and resilience at room temperature.
研究领域:
材料科学
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高分子化学
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机械工程
·
智能材料
✓ 已验证
产品关联
DOI
高影响因子
Advanced Fiber Materials
·
2025
·
IF 21.3
Li Jiaxin,Zhai Yaling,Su Xiaolong,Lu Zhenyan,Zhao Jian,Tian Guichao,Jia Chao,Zhu Meifang
Mullite fiber is one of the most outstanding oxide ceramic fibers for maintaining high-temperature performance while retaining flexibility. However, the rapid grain growth within mullite fibers inevitably compromises their flexibility, making the suppression of grain growth a significant challenge. Here, we develop high-performance mullite fibers with excellent flexibility at 1500 °C by optimizing the precursor-to-polymer molar ratio via solution blow spinning. Proper ratio control reduces excessive polymer content, minimizes pore defects, and, more importantly, suppresses grain growth during high-temperature treatment, thereby enhancing thermal stability and preserving fiber flexibility. The mullite fiber sponges exhibit excellent compressive resilience, high-temperature thermal insulation, and sound absorption properties. The sponges withstand 1000 compression-recovery cycles, achieve an ultralow thermal conductivity of 0.028 W m −1 K −1 , and demonstrate a sound reduction coefficient of up to 0.82. This study highlights the optimization of precursor-to-polymer ratios as a promising strategy to enhance mullite fiber properties, providing valuable insights for efficiently producing high-performance ceramic fibers and potentially extending to the fabrication of other ceramic fiber materials.
研究领域:
材料科学
·
陶瓷工程
·
隔热材料
·
声学材料
·
纳米纤维制备
✓ 已验证
产品关联
DOI
高影响因子
POLYMER DEGRADATION AND STABILITY
·
2025
·
IF 7.4
Caohong Chen,Fei Liu,Tao Yang,Caiqi Liu,Linrong Wu,Jinggang Wang,Jin Zhu
In this paper, we present a direct synthesis method for producing thermoplastic elastomer with high resilience and biodegradability by simply incorporating 1,5-pentanediol (PeDO), a bio-based monomer with odd carbon atoms, to poly(1,4-cyclohexandimethanol succinate), instead of using polyether soft segment. The incorporated PeDO is able to make the crystalline and amorphous regions of the copolyester reach an equilibrium at molar content of 40 %, resulting in novel thermoplastic elastomer with remarkable resilience (shape recovery ratio over 70 % at 200 % strain), exceptional mechanical (elongation at break over 1200 %). Meanwhile, it has excellent thermal stability and biocompatibility. Unlike traditional thermoplastic polyether ester elastomers that are difficult to degrade, this elastomer also possesses excellent degradability, with a mass loss of 100 % after a 6 days degradation in enzyme solution at 37 °C. This study developed a novel, concise, and efficient construction method for the fabrication of thermoplastic polyester elastomers based on thermoplastic semi-crystalline polyester, without using polyether soft segment, thus obtain novel and sustainable thermoplastic elastomers with good biodegradability and biocompatibility.
研究领域:
高分子科学
·
材料工程
·
可生物降解高分子
·
可持续材料
·
弹性体技术
✓ 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）