JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
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2025
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IF 6.2
Hao Zhang,Zhen Teng,Yiwang Bao,Man Jiang,Qingguo Feng,Chunfeng Hu
Oxide ceramic aerogels, one of the most important aerogels, hold significant application promise in thermal insulation and protection. However, their low strength, long preparation cycle, and supercritical drying dependence hinder their widespread use. In this study, we proposed a hybrid interpenetrating network strategy and prepared a hybrid Al 2 O 3 -SiO 2 aerogel (PAS) via ambient pressure drying. The structures, mechanical properties, thermal insulation performance, and mechanisms of PAS were systematically investigated. PAS exhibited remarkably low drying linear shrinkage (6.08%), substantially compressive strength (8.05 MPa), and impressive strain capacity (45%). Furthermore, PAS demonstrated exceptional thermal insulation (0.039 W/m·K at 25°C) and high-temperature structural stability. Mechanistic studies revealed that the hybrid interpenetrating network significantly reinforced the Al 2 O 3 -SiO 2 network, and inhibited the phase transition of Al 2 O 3 -SiO 2 in high-temperature. This study provides a reproducible approach for the rapid preparation of high-strength, low-thermal conductivity oxide ceramic aerogels and demonstrates its promising application potential in thermal protection.
研究领域:
材料科学
·
陶瓷材料
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热工工程
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纳米技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ADHESION SCIENCE AND TECHNOLOGY
·
2024
·
IF 2.7
Jianjun He,Caiyuan Huang,Min Pu,Zhonghu Shu,Zihao Duan,Zijing Zeng,Jianwei Li
To prepare a base layer of thermal insulation for the surface of wind turbine blades, we utilized SiO2 aerogel material with a nanoporous structure as the thermal insulation layer of an inorganic composite photothermal de-icing coating. We further investigated the influence of raw material ratio and process on the thermal insulation layer’s performance. By adjusting the process parameters, the microstructure and characteristics of the SiO2 aerogel thermal insulation coating were controlled. Microstructure scanning and EDS analysis were employed to assess the results. The results of the experiment suggest that, as opposed to brush coating, atomized spraying is a better technique for creating SiO2 aerogel thermal insulation coating. The coating possesses excellent mechanical stability and applicability, maintaining a coating wear rate within 5% after 20 wear cycles under a load of 1734 N/m2, and the coating achieves the highest class 0 surface adhesion to the substrate surface. The coating exhibits exceptional heat insulation performance, reaching a temperature of 32.7 °C after five spraying cycles, which is 20.0 ∼ 29.4 °C higher than the surface without producing a complete heat insulation layer. The SiO2 aerogel aqueous slurry has a viscosity of 31.3 ∼ 36.9 mPa∙s, which is capable of forming a uniform membrane surface when sprayed at a 60° angle at 0.95 MPa pressure. Consequently, this paper’s design of photothermal thermal insulation offers strong anti-abrasion and excellent thermal insulation, presenting a new avenue for scientific investigation into coating photothermal de-icing.
研究领域:
材料科学
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能源工程
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表面工程
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Luxia Yin,Jiacheng Xu,Bo Zhang,Leigang Wang,Wanyi Tao,Xiao Teng,Wensheng Ning,Zekai Zhang
A simple, low energy consumption and environment-friendly strategy was used to prepare highly dispersed CeO 2 /SiO 2 aerogel composites with different molar ratio of Si/Ce via sol-gel method and subsequently drying under the ambient pressure, in which the oxidation of Ce 3+ species into Ce 4+ species could be achieved by adding H 2 O 2 . The structural and surface properties of adsorbents were analyzed by XPS, XRD, FT-IR, Py-IR, SEM, XRF and N 2 adsorption-desorption isotherm. The adsorption desulfurization performances of CeO 2 /SiO 2 for thiophenic compounds from simulated gasoline and model aromatic products were investigated and compared by the breakthrough and batch adsorption experiments. As a result, the weak Lewis acid centers appeared on the surface of CeO 2 /SiO 2 . Among them, CeO 2 /SiO 2 with a Si/Ce of 25 performed best, the adsd by Duanpacity for TP from simulated gasoline (n-heptane) was 10.9 mg-S/g ads , followed by model aromatic products (benzene, 10.6 mg-S/g ads ; p-xylene, 10.1 mg-S/g ads ), however, the difference between them was slight, attributed to the formation of S-Ce bonding instead of C-Ce bonding. The very weak competitive adsorption of benzene and p-xylene with thiophene originated from the weak Lewis acid-base interaction. After the fourth solvent washing regeneration, the breakthrough adsorption capacity of regenerated CeO 2 /SiO 2 -25 still remained 60% of the fresh one. The equilibrium adsorption data of CeO 2 /SiO 2 -25 for thiophene were well fitted by Langmuir and Freundlich model, and the adsorption for TP was more favorable at the higher temperature. The adsorption process of CeO 2 /SiO 2 -25 was well fitted by pseudo-second-order kinetic model, which was spontaneous, endothermic and the freedom degree increased. The solvent (n-heptane, benzene, p-xylene) hardly influence the adsorption behavior of TP on CeO 2 /SiO 2 .
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
COMPOSITES PART B-ENGINEERING
·
2025
·
IF 14.2
Chuanyi Liu,Wenlong Xu,Cheng Wang,Dong Ma,Zhihui Zeng,Na Wu
In industrial explosion accidents, mechanical shock waves and flame thermal radiation are the main destructive factors, posing serious threat to life and property. Current designs mainly focus on one of these factors, so it is necessary to develop protective materials against both destructive factors. TPP (Triphenyl phosphate) - SiO 2 Aerogel synergistically modified polyurea composites were developed in this work, which process excellent mechanical shock wave mitigation performance and enhanced flame retardancy. The mechanical shock wave mitigation experiments were conducted on Multi-purpose Shock Cannon (MSC), Human Tissue Equivalent Target (HTET) and full-scale human head model, which comprehensively evaluated the protective performance of polyurea composites for the human body. The flame retardancy was assessed through thermal conductivity, LOI, thermal gravimetric and small flame experiment. The combustion residue was analyzed using SEM, EDS, Raman spectroscopy, and XPS technologies, revealing flame retardant mechanism of TPP-SiO 2 Aerogel synergistically modified polyurea composites. The results showed that the TPP-SiO 2 Aerogel synergistically modified polyurea composites achieved the highest mitigation ratios of overpressure peak and acceleration peak at 13.20% and 60.87%, respectively, superior to those of fiber-enhanced polymer composites (Fiber-PE, Fiber-PA6, Fiber-ASA), single filler polyurea, wood and PLA plastic. The flame retardancy was effectively improved, with the highest LOI reaching 24.9%, far higher than that of pure polyurea (19.6%). It particularly enhanced the carbonization performance of polyurea composites during combustion, eliminating burning material dropping phenomenon. The thermal insulation performance was also elevated, with the lowest thermal conductivity reduced by 58.6% compared to pure polyurea.
研究领域:
材料科学
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安全工程
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燃烧学
✓ 已验证
产品关联
DOI
高影响因子
FUEL
·
2023
·
IF 7.4
Liping Du,Binfei Li,Teng Lu,Boliang Li,Zhaomin Li,Jiqian Wang
To address problematic low reservoir recovery rates, a new porous SiO 2 aerogel nanosuspension (NS) with emulsifying effects was developed, and its microstructure and flow characteristics were analysed with physical property and rheological tests. Moreover, macro- and microlevel flooding experiments were carried out to explore the mechanism for enhanced oil recovery (EOR). The results showed that the final recovery rates were 58.23% and 60.68% with 0.8 PV NS and NS foam slug, respectively, which were 10.03% and 13.62% higher than those of secondary oil recovery. Oil-water emulsions with different emulsification degrees were generated after sufficiently oscillating the NS and condensate oil mixture. NS flooding exhibited evident nonpiston characteristics in the early stage, and particles were transferred from water into the oil phase, which resulted in differential emulsification of the oil. The oil flow status was altered from flakes to droplets due to emulsification and the changing passage cross-section caused by particle accumulation. With NS foam flooding, the oil was first replaced by coherent large bubbles and then migrated under the effects of multiple systems. A particle circumfluence layer around the foam absorbed oil to generate an adhesive oil film.
研究领域:
石油工程
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材料科学
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流体力学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF NON-CRYSTALLINE SOLIDS
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2023
·
IF 3.5
Yuting Wang,Chengyi Chu,Chenqi Duan,Jiajing Dong,Hao Chen,Songtao Ying,Jianjun Guo,Gaojie Xu,Fang Hu,Yuchuan Cheng,Aihua Sun
Due to aerogel's network structure, specific surface area, and high porosity, SiO 2 aerogel has excellent thermal insulation and inferior mechanical properties. It is challenging to produce micro-objects and complex-shaped objects accurately by traditional manufacturing method because of the fragile mechanical properties. Here, we use 3D printing to fabricate SiO 2 aerogels. At the same time, we add opacifiers to reduce the aerogel's medium-high temperature thermal conductivity. The thermal conductivity of the SiO 2 aerogel printed in the experiment is as low as 0.028 W/(m·K) at room temperature. The aerogel doped with 10 wt% SiC has the best thermal insulation at medium-high temperatures. And the 3D printed aerogel doped with 10 wt% SiC has a compression performance of 1.19 MPa, which is more than 10 times better than the usual aerogel. This paper provides a method for creating micro-objects and complex-shaped objects with excellent medium-high temperature thermal insulation using Direct Ink Writing (DIW).
研究领域:
材料科学
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增材制造
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热工程
✓ 已验证
产品关联
DOI
高影响因子
Journal of Chemistry
·
2019
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IF 1.727
Shiyun Tang,Jingyu Ran,Junjiang Guo,Anjiang Tang
To obtain high stable and effective TiO2 photocatalyst, nano-N-doped TiO2@SiO2 (TiO2−xNx@SiO2, 0 ≤ x ≤ 2) composite aerogels were synthesized by the sol-gel method combined with supercritical drying and direct oxidation process. The adsorption/photocatalytic degradation efficiency of TiO2−xNx@SiO2 aerogels was evaluated by the degradation of RhB in aqueous solution under visible light irradiation. The physiochemical properties of the aerogels were examined by XRD, FT-IR, TEM, SEM, TG/DTA, and BET methods. It was found that the specific surface areas of all TiO2−xNx@SiO2 samples exceeded 700 m2/g and exhibited a honeycomb porous structure with fine particulate morphology. Photocatalytic activity tests show that the 500-TiO2@SiO2 composite aerogel exhibits the best adsorption/photocatalytic degradation rate for RhB, which obtained about 80% of the degradation rate in 30 min under visible light and over 95% after 120 min. On the one hand, the SiO2 aerogels can significantly inhibit the phase transition of TiO2, and the nano TiO2 can be highly dispersed in the SiO2 aerogels; On the other hand, if the oxidation temperature is selected properly, the N-doped TiO2−xNx@SiO2 aerogel can be obtained by simple TiN@SiO2 aerogel oxidation.
研究领域:
材料科学
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环境科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Baolu Shi,Jia Liu,Jinzhuo Shi,Donghui Guo,Runze Jin,Zihan Zhou,Yu Chen,Baosheng Xu,Ning Zhou
Effectively insulating against excessive heat generated by sunlight while also avoiding harmful ultraviolet (UV) and maintaining suitable levels of visible light transparency is vital for minimizing energy consumption and optimizing sunlight utilization. To address the challenge of photothermal collaborative management, the PI consisted of high fluorinated dianhydride and aliphatic diamine was used to effectively improve the performance of SiO 2 aerogels. The resulting PI-SiO 2 aerogels retain the characteristics of SiO 2 aerogels, such as low density, high transparency between 82∼89 %, and excellent thermal insulation properties with an ultralow thermal conductivity range from 0.023 W/(m.K) to 0.028 W/(m.K). Meanwhile, the coarsened skeleton of aerogels can withstand the extreme temperature difference between −196 ℃ and 200 ℃ without brittle fracture and yellowing. In addition, PI-SiO 2 aerogels exhibit the capability to absorb a significant proportion of UV light within the 200–400 nm, offering distinct advantages in transparent thermal insulation materials. The multifunctional PI-SiO 2 aerogels can be used as candidate materials in the fields of architecture, automobile, electronics, solar energy and aerospace.
研究领域:
材料科学
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纳米技术
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光学工程
·
能源效率
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Lihao Liu,Zhaofeng Chen,Lixia Yang,Mengmeng Yang,Qiong Wu,Mingxiao Shi,Bin Hou
The fiber/aerogel material prepared by the traditional method of sol-gel has a serious powder shedding phenomenon, and has serious environmental pollution and health hazards. In this study, an environmentally friendly porous sound absorption material with a cage-like structure, which used flexible ultrafine glass/quartz hybrid fibers (HFs) as the carrier and SiO 2 aerogel as the pore filler, was produced using the wet manufacturing process. The addition of aerogel enhanced the internal reflection of sound waves, reduced the propagation speed, increased the acoustic energy loss and improved the sound absorption coefficient (SAC). The noise reduction coefficient (NRC) reaches 0.49 in the range of 250–6300 Hz. The obtained composite presented a low density (73.5 mg/cm 3 ) and heat resistance up to 500 °C.
研究领域:
材料科学
·
环境工程
·
声学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF NON-CRYSTALLINE SOLIDS
·
2018
·
IF 2.488
Huijun Yu,Yiting Jiang,Yufa Lu,Xiaolei Li,Hangyuan Zhao,Yuecheng Ji,Mingjing Wang
A low-cost and high-performance quartz fiber/Al 2 O 3 -SiO 2 aerogel (QF/ASA) composite insulation material has been successfully prepared by vacuum filtration molding and sol-gel impregnation following surface-modified ambient pressure drying (APD). The macroporous in the quartz fiber perform are filled by Al 2 O 3 -SiO 2 aerogels with a large amount of mesoporous. The morphology, microstructure, thermal conductivity and thermal stability of the QF/ASA composite were investigated. Compared to the fiber/aerogel materials dried by supercritical drying, the composite exhibits similar low density (0.36 g·cm −3 ), high specific surface area (580.5 m 2 ·g −1 ), low thermal conductivity (0.049 W·m −1 ·K −1 ) at room temperature. The compressive strength of the composite up to 0.85 MPa which is approximately triple as much as that of fiber perform. After being heated at 600 to 1100 °C, the specific surface area of composite aerogel decrease from 578.0 to 113.6 m 2 ·g −1 and the linear shrinkage is almost zero. The XRD patterns show that mullite (3Al 2 O 3 ·2SiO 2 ) appeared in the Al 2 O 3 -SiO 2 aerogel after heat-treatment at 1100 °C, which is consistent with the molar ratio of silica and alumina of 2:3.
研究领域:
材料科学
·
化学工程
·
热绝缘
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Zhanfeng Li,Xibin Yi,Jia Liu,Luyi Zhu,Ruixiang Liu,Benxue Liu
The configurations of the embedded fibers within aerogel composites influence the mechanical and thermal performances significantly, rendering the composites suitable for harsh conditions. With this regard, quartz fiber preforms were designed by carding quartz fibers wool, then layer-by-layer stacking in a space-confined mold, where the fibers were pre-compressed, resulting in spring-back behavior that opposes the direction of compression. ZrO 2 -SiO 2 aerogel precursor was infiltrated into the fiber preform to form quartz fiber reinforced ZrO 2 -SiO 2 aerogel (QFZSA) composites with the assistance of vacuum impregnation, sol-gel chemistry and supercritical drying. Thanks to the spring back effect of the fiber preform, the QFZSA composite exhibits exceptional out-plane mechanical strengths; compressive and bending strengths both reached nearly 1 MPa. In addition, the layer stacking structure of the fiber preforms efficiently suppressed conductive heat transfer as well as radiative heat transfer, endowing ultra-low thermal conductivities of 0.036 W m -1 K -1 and 0.070 W m -1 K -1 at 1000 ºC and 1200 ºC, respectively. The densities of the QFZSA composites with varying fiber volume fractions were in the range of 0.16-0.24 g cm -3 . X-ray computed tomography provided comprehensive characterization of the QFZSA composites, including fiber configuration, fiber volume fraction, interfacial area, and defect volume fraction, among others, which are important parameters governing composite properties. The as-prepared QFZSA composites are capable of finding applications in many leading-edge thermal protection fields.
研究领域:
材料科学
·
航空工程
·
热工学
·
复合材料
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Shihua Zhang,Shuang Dai,Qiao Huang,Jincan Huang,Shengqiang Hei,Peng Wang,Biming Liu
The confinement effect triggered by nano-confinement systems in the advanced oxidation processes has received extensive attention. In this study, the strategy of constructing stable confined Co 3 O 4 @SiO 2 materials and activating peroxymonosulfate (PMS) was adopted to successfully achieve the efficient removal of enrofloxacin (EON). The removal efficiency of EON by Co 3 O 4 @SiO 2 (0.08 g/L) could reach 99 % at pH 0 of 7 and PMS of 0.2 g/L, and the optimal degradation rate could reach 0.147 min −1 , which was 9.6 times higher than that of the unconfined system. The reaction process was mainly driven by the synergistic interaction between the non-radical 1 O 2 and the interfacial electron transfer network, and the formation of oxygen vacancies within the reaction system accelerated the degradation process. Density functional theory calculations further showed that the confinement effect of SiO 2 aerogel stabilized the Co 3 O 4 nanoparticles, the charge transfer efficiency between Co 3 O 4 @SiO 2 and PMS was optimized, and at the same time, Co 3 O 4 was the key active site for EON degradation. This research can provide an effective strategy for the activation of PMS by SiO 2 aerogel confined structure to remove antibiotic pollutants.
研究领域:
环境科学
·
材料化学
·
高级氧化过程
·
纳米材料
·
污染物降解
✓ 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）