MOLECULES
·
2024
·Vol. 29
·期 8
·1834
·
IF 4.2
Mengruo Wu,Le Mu,Zhiyue Zhang,Xiangna Han,Hong Guo,Liuyang Han
Tetraethoxysilane (TEOS) is the most commonly used silicon-based reinforcement agent for conserving art relics due to its cost-effectiveness and commercial maturity. However, the resulting silica gel phase is prone to developing cracks as the gel shrinks during the sol–gel process, potentially causing severe damage to the objects being treated. In this study, dodecyltrimethoxysilane (DTMS) was introduced into TEOS to minimize this shrinkage by adding elastic long chains to weaken the capillary forces. The gel formed from the DTMS/TEOS hybrid material was transparent and crack-free, featuring a dense microstructure without mesopores or micropores. It exhibited excellent thermal stability, with a glass transition temperature of up to 109.64 °C. Evaluation experiments were conducted on artificially aged, handmade bamboo paper. The TEOS-based hybrid material effectively combined with the paper fibers through the sol–gel process, polymerizing into a network structure that enveloped the paper surface or penetrated between the fibers. The surface of the treated paper displayed excellent hydrophobic properties, with no significant changes in appearance, color, or air permeability. The mechanical properties of the treated bamboo paper improved significantly, with longitudinal and transverse tensile strengths increasing by up to 36.63% and 44.25%, respectively. These research findings demonstrate the promising potential for the application of DTMS/TEOS hybrid materials in reinforcing paper relics.
研究领域:
文物保护
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Advanced Energy Materials
·
2024
·
IF 24.4
Mengjie Si,Xianfeng Jian,Yu Xie,Jiahui Zhou,Wei Jian,Ji Lin,Yufeng Luo,Jiayu Hu,Yan-Jie Wang,Dong Zhang,Tiefeng Wang,Yujing Liu,Zi Liang Wu,Si Yu Zheng,Jintao Yang
Binder plays an important role in maintaining the integrity of sulfur electrode in lithium-sulfur (Li-S) battery. However, cracks are easily generated inside the electrode and compromise its performance due to the volume change of sulfur during redox reaction and continuous vibration originated from the external environments. It is a challenge yet crucial to develop tough binders with crack-insensitivity and damping performance. Herein, a polymeric binder is designed with special viscoelastic behavior by tailoring its electrolyte-philic and electrolyte-phobic domains. The loss modulus of the binder is regulated to be highly close to its storage modulus within a wide range of frequency, generating an ultra-high loss factor and equilibrium of viscosity-elasticity. Based on such rheological behavior, the binder holds 1) high damping ability across a wide frequency to suppress crack generation, 2) high toughness with crack blunting behavior to resist crack propagation, 3) efficient healing capability to repair the cracks. Besides, the pendant zwitterionic groups can immobilize the lithium polysulfides and promote ion transfer. Benefiting from these advantages, the obtained Li-S battery delivers high specific capacity with considerable capacity retention after long-term cycling. The viscoelastic design and crack management strategy illustrated here would provide new insights into the binder design.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
CONSTRUCTION AND BUILDING MATERIALS
·
2023
·
IF 7.4
Haopeng Zhang,Yanjun Qiu
In recent years, the wax-based warm mix additives are always doped into the asphalt to lower the construction temperatures, which can lead to the substantial energy savings and promote energy sustainability. However, few studies have considered the methods to inhibit the premature precipitation of wax-based warm mix additives in warm mix asphalt, which will deteriorate the cracking resistances of asphalt pavement. This paper introduced a new method from the essence of the phase separation between the wax-based warm mix additives and asphalt leading to the reduction of cracking resistance, which chemically inhibited the premature precipitation of common additives (linear aliphatic hydrocarbon (LAH), polyethylene (PE), fatty acid amides (FAA), and Fischer-Tropsch (F-T) waxes) by wax inhibitors (WIs) to improve the compatibility of additives, and the cracking resistances of warm mix asphalts with addition of WIs were also investigated through the multi-stress creep recovery (MSCR), linear amplitude sweep (LAS), dynamic mechanical analysis (DMA), and thermal fatigue tests. The results show that the wax precipitation temperature (WPT) of warm mix asphalt reduces with the addition of WIs to inhibit the precipitation of additives to improve the compatibility, and the wax inhibition efficiencies of WIs are better with the asphalt doped with short-chain additives at higher content. The WIs can provide the warm mix asphalt with the additional elasticity and decrease the dependency on the applied strain, which increases the high-temperature rutting and intermediate-temperature fatigue resistances. The cracking and thermal fatigue resistances of warm mix asphalt at the low temperature can also be improved after doping with WIs, which is leaded by the precipitation inhibition of additives. Therefore, it is promising to improve the cracking resistances of warm mix asphalts and develop a new energy-saving pavement by chemically inhibiting the precipitation of additives.
研究领域:
土木工程
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Polymer Materials
·
2024
·
IF 4.4
Xin Ren,Hongjun Xu,Li Jin,Changbiao Chen,Xueting Lu,Shuaibo Han,Hui Wang,Yan Zhang,Fangli Sun
Bamboo, attributed to its short growth cycle and excellent mechanical properties, has become a popular alternative to wood and other building materials such as cement and steel. However, its susceptibility to cracking and molds hinders its broad application in architecture and furniture. In this study, the bioresin polyfurfuryl alcohol (PFA)-modified epoxy resin (EP)/polyetheramine (PEA) system was constructed and in situ cured inside bamboo. Results showed that the epoxy/PFA bioresin could fill in the vascular bundles and parenchyma cells of bamboo, in situ cured and combined with it via hydrogen bond to form a composite with good overall performance. Especially, the epoxy/PFA bioresin possessed good shape memory performance, which was able to counteract the dry shrinkage stress of bamboo. The three cycles of extreme heating–cooling tests and 6 h continuous drying test at 103 °C were conducted to verify the modification effect on crack resistance of bamboo. The PFA/EP/PEA-modified bamboo culms remained crack-free, while 75% of untreated ones cracked in heating–cooling tests. Besides, when all of the untreated bamboo culms cracked, only 33.3% of the PFA/EP/PEA-modified bamboo had cracks in the continuous drying test. Furthermore, the epoxy/PFA bioresin system in bamboo also improved the mold resistance. The bioresin composites comprising bamboo, epoxy, and PFA exhibit considerable potential for advancing the incorporation of bamboo into ecologically sustainable practices within the realms of construction and furniture applications. This advancement extends the lifespan of bamboo products as well as expands their application scope particularly in regions experiencing substantial fluctuations in outdoor humidity.
研究领域:
材料科学
·
生物质工程
✓ 已验证
产品关联
DOI
高影响因子
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
·
2018
·
IF 4.514
Xiao Zhang,Jian Zheng,Haoming Fang,Yafei Zhang,Shulin Bai,Guansong He,Ke Li
Catalysis and crack resistance are essential for the combustion and structure performances of composite energetic materials. Currently, catalysis is dominated by toxic metals, and chemical coupling agents are always needful for fabricating the robust interface to resist cracks, without a feasible green alternative method. In this work, a recrystallization method was developed in pure water, by which graphene oxide (GO) was perfectly coated on NaNO 3 particles without any coupling agent. The particle size of NaNO 3 /GO is much smaller than that of pure NaNO 3 , due to the inhibition of GO to the growth of NaNO 3 crystals. The ultrathin GO coating on the NaNO 3 presents effective catalytic activity on the thermal decomposition of NaNO 3 and crack resistance capability in the NaNO 3 /GO/polyurethane composites. This green and effective approach may open up the opportunities to develop various high-performance composite energetic materials with great potential.
研究领域:
材料科学
·
能源化学
✓ 已验证
DOI
高影响因子
Journal of Building Engineering
·
2025
·
IF 7.4
Dandan Yan,Min Li,Chunxiang Qian
The cement containing heavy metals for collaborative disposal (HMC) as a low-environmental-load cementitious material still encounters challenges related to temperature-induced cracking due to high hydration heat. In this paper, a paraffin (PA)/metal-organic framework (MOF) composite phase change material (CPCM) with excellent shape stability, thermal storage capacity, and thermal stability was creatively integrated into HMC, aiming to investigate the impacts of CPCM on the hydration heat release behavior. The compressive strength and hydration product evolution of HMC paste mixed with CPCM were also discussed. The experimental results demonstrated that CPCM notably reduced the initial hydration rate (especially the main exothermic peaks) and total hydration heat of HMC, regardless of the hydration temperature. Furthermore, the impact of CPCM on the hydration heat of HMC was found to be positively correlated with the dosage. Additionally, the compressive strength of composite paste decreased and chromium (Cr) leaching content increased due to the addition of CPCM, which can be attributed to the expansion of paste pores. But, the additional inclusion of minute quantities of ZIF-8 significantly ameliorated these negative effects. Moreover, CPCM, ZIF-8, and hydration temperatures did not change the type of hydration products in HMC, but they did affect the amount and microstructure of hydration products. CPCM indeed effectively reduced the hydration heat of HMC, this study offers new insights into the use of phase change materials to mitigate the thermal cracking issue in cementitious materials.
研究领域:
建筑材料学
·
环境工程
✓ 已验证
产品关联
DOI
高影响因子
Nature Communications
·
2025
·Vol. 16
·期 1
·1-11
·
IF 15.7
Lyu Xiaolin,Yu Kun,Zhang Haoqi,Zhou Piaopiao,Shen Zhihao,Zou Zhigang
Ion-conductive materials have received much attention because of their good mechanical and electrical properties. However, their practical applications are still hampered by limited toughness and crack resistance, stemming from the restricted size of energy dissipation zones, which impacts their reliability and durability. Herein, tough fiber-reinforced composite ionogels (FRCIs) with crack resistance are fabricated by incorporating high-performance fibers into elastic ionogels to efficiently dissipate energy. The FRCIs exhibit good tearing toughness, high strength, high elastic modulus, and low bending modulus. The toughness and crack resistance of the FRCI far exceed that of previously reported gel materials, even outperforming metals and alloys. Furthermore, the electrical resistance of FRCI shows high sensitivity to deformation. Moreover, it remains undamaged after undergoing 10,000 bending cycles when fixing the artificial bone, and possesses self-sensing impact resistance, demonstrating great potential in intelligent robots and smart protective equipment.
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
CEMENT & CONCRETE COMPOSITES
·
2025
·
IF 13.1
Yuwei Zhang,Chengliang Zhou,Yafeng Gong,Fei Wu,Yuheng Liu,Jiaxiang Song,Fuyu Wang
Coal gangue/slag-based geopolymer composites (CSGC) have garnered significant attention in sustainable construction due to their low-carbon footprint, but their high brittleness remains a critical limitation. This study addresses this challenge by modifying basalt fiber (BF) with polyvinyl alcohol (PVA) to enhance CSGC. A novel porosity detection program, with an average accuracy exceeding 98 % for pores larger than 10 pixels (0.4 mm), was developed to analyze pore evolution. Combined with a multi-scale testing approach, the study evaluates shrinkage, fracture toughness, compressive strength, and flexural strength of fiber-reinforced CSGC. Results revealed that PVA coating enhanced fiber-CSGC matrix bonding via chemical crosslinking, such as O-Al-O bonds, and mechanical interlocking, achieving 15.9 % and 19.1 % improvements in the 28-d flexural and compressive strength of modified basalt fibers (MBF)-reinforced CSGC, respectively. Acoustic emission (AE) analysis indicated that fibers shifted the dominant cracking mode from shear to a mixed tensile-shear mode (20.99 % tensile cracks), thereby enhancing CSGC toughness. Moreover, double-K fracture model analysis, based on digital image correlation (DIC) test results, confirmed that MBF outperforms unmodified fibers in toughening effects, with increases of 50.0 % and 32.4 % in initiation and unstable fracture toughness, respectively. This study presents an effective strategy for reducing brittleness in geopolymers through interface-engineered fiber reinforcement, which is expected to promote the development of high-performance, sustainable construction materials.
研究领域:
建筑材料
·
可持续发展工程
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
POLYMER BULLETIN
·
2025
·Vol. 83
·期 4
·179
·
IF 4
Shen Xiaoxuan,Chen Longhai,Ma Yichang,Li Ziyi,Liang Bo,Zhang Yue-Fei
Using BASF commercial polyurethane 1185 A (TPU) as the modifying material, polyurethane-modified asphalt in varying dosages was created for this study. The rheological properties, fatigue behavior, temperature sensitivity, chemical composition, and self-healing properties of polyurethane-modified asphalt were all characterized using multi-dimensional characterization techniques, such as the dynamic shear rheometer test (DSR), bending creep stiffness test (BBR), fatigue-healing-fatigue test, Fourier transform infrared spectroscopy (FTIR), and scanning electron microscopy (SEM). The findings of the study indicated that adding TPU to asphalt can optimize its low-temperature performance, effectively increase its low-temperature flexibility, and greatly increase its resistance to low-temperature cracking. Excellent interfacial adhesion between the modifier and the base asphalt was found by microscopic morphological investigation. According to the results of the fatigue-healing-fatigue tests, the modified asphalt’s self-healing performance progressively improved as the TPU content rose, peaking at 6% TPU content. When the TPU concentration is 6%, the changed asphalt achieves the best overall modification effect, according to a thorough investigation of all performance metrics. This study’s findings offer a theoretical foundation for enhancing matrix asphalt’s rheological characteristics and self-healing capabilities while also prolonging the pavement’s service life.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2017
·Vol. 134
·期 48
·45510
·
IF 1.86
Chunmiao Xia,Yingwu Luo
Bitumen emulsions have often been modified by styrene–butadiene rubber latex. The modified bitumen can have excellent low-temperature cracking resistance, but rutting resistance at high temperature still remains poor. In the current work, for the first time, a stable poly(styrene- b -isoprene- b -styrene) (SIS) triblock copolymer latex is synthesized by reversible addition–fragmentation transfer (RAFT) emulsion polymerization. Based on this, a simple heterocoagulation process is developed to prepare the bitumen emulsions modified by SIS. The heterocoagulation results in hybrid particles of SIS shell and bitumen core. With addition of 5 wt % SIS, a continuous polymer-rich phase could be formed in the modified bitumen once the modified emulsion was broken down. The bitumen modified by 5 wt % SIS shows a significant increase in complex modulus at high temperature and a significant decrease in loss tangent, suggesting excellent resistance to rutting at high temperature, which is consistent with the significant increase in softening point from 41 °C for the base bitumen up to 64 °C. Meanwhile, the ductility at 5 °C of the modified bitumen is also dramatically increased from 1.4 cm for the base bitumen to 40 cm, indicating the low-temperature cracking resistance should also be much enhanced. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017 , 134 , 45510.
研究领域:
材料科学
·
高分子科学
·
土木工程
✓ 已验证
DOI
高影响因子
Journal of the American Chemical Society
·
2025
·
IF 15.6
Zi-Wei Wang,Jin-Da Luo,Zhong-Yuan Huang,Wanxia Li,Hao-Yuan Tan,Xiaobin Cheng,Mei-Yu Zhou,Xu-Dong Hao,Chen-Peng Luo,Chuan Wan,Linjun Wang,Yi-Chen Yin,Shuhong Jiao,Hong-Bin Yao
All-solid-state sodium batteries (ASSSBs) with a working voltage of approximately 3.5 V hold great potential for safe, sustainable, and high-energy-density electrochemical energy storage. However, 3.5 V oxide-type cathodes (e.g., NaNi1/3Fe1/3Mn1/3O2) may suffer from interfacial contact loss with solid electrolytes due to their intrinsic rigidity, resulting in irreversible capacity degradation during cycling. Herein, we report a highly deformable chloride cathode, NaFeCl4, displaying Young’s modulus of only 1.33 GPa and excellent structural reversibility. Benefiting from the soft lattice, the NaFeCl4 cathode maintains a crack-free morphology despite significant changes in structural units between tetrahedra [Fe3+Cl4] and octahedra [Fe2+Cl6] upon repeated Na+ insertion/extraction, achieving a high capacity retention of 84.4% over 500 cycles. Moreover, with only 5.2% of the cost of the NaNi1/3Fe1/3Mn1/3O2 and 3.7% of the cost of Na3V2(PO4)3 cathode, NaFeCl4 can deliver a working voltage of ∼3.45 V vs Na+/Na and energy density of ∼405 Wh kg–1. This chloride cathode offers new insight into solving the mechanical issues in solid-state systems, guiding future developments of low-cost, stable, and high-voltage cathodes for ASSSBs.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Coatings Technology and Research
·
2022
·Vol. 19
·期 3
·947-957
·
IF 2.339
Liu Xueting,Fan Ying,Li Yuan,Liu Wenkui,Wu Jingjing,Liu Changming,Yang Bin,Pang Zhicheng
This paper mainly studies an inorganic coating based on geopolymer technology. Metakaolin is used as raw material, and water glass solution is used as alkali activator to prepare geopolymer. The surface properties including crack resistance and scrub resistance of the obtained coating were improved by adding certain amount of resin and fillers such as silicone acrylic emulsion, mica powder, and MgO powder. The results show that when the contents of silicone acrylic emulsion, mica powder, and MgO powder are 19.00%, 3.20%, and 2.16–2.86%, respectively, the surface properties of the coating are optimal. Especially noteworthy is that adding MgO can enhance the surface properties of the prepared coating, the mechanism of which can be rationalized by the inhibited shrinkage of the coating via microcrack deformation, the enhanced compactness and the filled pores of the coating upon adding MgO. In addition, the flame retardancy of the samples was explored through thermal analysis and cone calorimeter.
研究领域:
材料科学
·
化学工程
·
涂料技术
✓ 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）