JOURNAL OF POROUS MATERIALS
·
2025
·
IF 3.2
Zhan Chao,Lu Qingchen,Jiang Haoyu,Lu Huidan,Liu Yongping
Silica aerogel, renowned for its ultra-low thermal conductivity, holds significantpotential as an advanced thermal insulation material. However, its practical application is hindered by limitations in strength and mechanical properties, particularly under harsh, high-temperature conditions, which compromise both mechanical resilience and insulation. To mitigate this, we synthesized silica nanofibers via electrostatic spinning and subsequently crafted thermally and mechanically robust cellulose fiber/silica nanofiber aerogel composites through freeze-drying. The resulting aerogel demonstrates remarkable physical properties: an ultra-lightweight bulk density of 1.3 mg/cm³, low thermal conductivity (47 mW·m⁻¹·K⁻¹ at 1000 °C), and high resilience. The internal fiber network is densely cross-linked, enhancing collapse resistance, structural stability, and rigid support. Mechanical testing revealed a high stress of 0.88 kPa at 80% compressive strain, which reached 1.02 kPa following 900 °C treatment. Thermal stability and insulation tests demonstrated the aerogel’s ability to withstand extreme temperatures (no combustion under a 1,300 °C flame) and maintain effective thermal insulation while retaining good recovery at 600 °C. These findings indicate that the novel aerogel composites surpass traditional ceramic fiber aerogel materials in mechanical and thermal insulation properties at high temperatures, presenting widespread application potential in extreme high-temperature environments.
研究领域:
材料科学
·
热能工程
✓ 已验证
产品关联
DOI
高影响因子
Materials Today Communications
·
2024
·
IF 3.7
Hao Chen,Jianjun Chen,Yongwei Lou,Mingming Zhu,Jinxia Li,Jiahao Yang,Hussain Zaheer
SiC nanowire paper composed of SiC nanowires, possesses extensive industrial applications owing to its remarkable properties of low thermal conductivity , fire resistance and foldability. In this work, centimeter-scale SiC nanowires were successfully synthesized via a sol-gel and carbothermal reduction reaction. Subsequently, the simple and convenient traditional handcraft paper-making process enables the non-oriented intertwining of nanowires, forming a paper-like structure. Experimental results show that the thermal conductivity of silicon carbide nanowire paper with a thickness of 0.7 mm is 0.041 W/m∙K at room temperature, which is far lower than that of the traditional porous ceramics because of its nanoporous structure. Moreover, upon heating the nanowire paper to 300 °C, a significant temperature difference of approximately 150 °C was observed between its front and back surfaces, and it was able to withstand the butane flame (∼1300 °C) heat treatment for a long time, which indicated that the nanowire paper had obvious low thermal conductivity, good thermal insulation and refractory properties. These characteristics ensure the promising application of SiC nanowire paper for thermal insulation and fire resistance applications.
研究领域:
材料科学
·
热物理学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Qiyan Ji,Li Zhang,Xiuling Jiao,Dairong Chen
Alumina aerogels are desirable for lightweight and highly efficient thermal insulation. However, they are typically constrained by brittleness and structural collapse at high temperatures. The manufacture of alumina aerogels with ultralow thermal conductivity and excellent thermal stability at high temperatures beyond 1300 °C is still challenging. Herein, alumina aerogels with superior ultrahigh-temperature-resistant and thermal insulation were successfully prepared by assembling the α-Al2O3 nanosheets with silica sols as the high-temperature binders. Benefiting from the generation of the mullite-covered alumina biphasic structure, the α-Al2O3 nanosheet-based aerogels (ANSAs) exhibit excellent thermal and chemical stabilities even after calcination at as high as 1600 °C. The ANSAs had a low thermal conductivity (0.029 W·m–1·K–1 at room temperature), structural stability with a measured compressive strength of 0.6 MPa, and good thermal shock resistance. Furthermore, the 2D α-alumina@mullite core–shell sheets were also prepared as assembly units to construct aerogels (AMSAs). This core–shell structure can improve temperature resistance through inter-lattice suppression under continuous energy input at high temperatures. The AMSAs have a linear shrinkage of only 2.7% after calcination at 1600 °C for 30 min, further improving the temperature resistance, making them an ideal super-insulating material for applications at extremely high temperatures.
研究领域:
材料科学
·
热力学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ENERGY
·
2023
·
IF 9
Richeng Lian,Mingyu Ou,Haocun Guan,Jiahui Cui,Junxiu Piao,Tingting Feng,Jinyong Ren,Yaxuan Wang,Yaofei Wang,Lei Liu,Xilei Chen,Chuanmei Jiao
Rigid polyurethane foam (RPUF) has received extensive attention as an energy-saving building material . However, it is still a great challenge to easily fabricate multifunctional RPUFs that combine excellent mechanical properties, flame retardancy, and thermal insulation . Herein, ammonium polyphosphate was chemically modified with 2-aminobenzimidazole (APP@Abz) through an ion exchange reaction. It has been found that APP@Abz is well-dispersed in RPUF matrix. FR-RPUF3 containing 10.0 wt% of APP@Abz shows excellent thermal insulation performance with a 5% increase in thermal conductivity compared to virgin RPUF. In addition, FR-RPUF3 exhibits ultrahigh flame retardancy and smoke suppression (total heat release, total smoke production, and smoke factor decreased by 50.61%, 61.90%, and 64.70%, respectively) in comparison to virgin RPUF. More importantly, FR-RPUF3 exhibits improved mechanical properties and hydrophobicity compared to virgin RPUF. This study is of great importance for the development and application of building insulation materials.
研究领域:
建筑材料
·
化学工程
·
能源材料
✓ 已验证
产品关联
DOI
高影响因子
Materials Today Communications
·
2022
·
IF 3.662
Xiaoshan Zhang,Yonggang Jiang,Nana Xu,Haiyan Liu,Nan Wu,Cheng Han,Bing Wang,Yingde Wang
The radome and antenna windows of aerospace aircrafts highly require multifunctional materials that are thermal stable, capable of wave-transparent and have excellent thermal insulation performance. Due to the SiO 2 aerogel with high thermal stability, low dielectric constant and ultralow thermal conductivity , they are considered as promising high-temperature thermal insulating and wave-transparent materials. In this work, the SiBNO fibers with good wave-transparent performance were used as reinforcements to prepare SiO 2 aerogel composites (SiBNO f /SiO 2 ACs) by sol-gel impregnating and supercritical drying method. The prepared SiBNO f /SiO 2 ACs exhibit integrated performances of excellent fire resistance, high-temperature stability (1100 °C in Air), high mechanical properties (compressive strength is 1.89 ± 0.14 MPa at 40 % strain and bending strength is 1.93 ± 0.03 MPa), ultralow thermal conductivity (0.029 W m −1 K −1 at 25 °C and 0.051 W m −1 K −1 at 1100 °C) and good wave-transparent property (dielectric constant<1.45, loss tangent<0.01 in 4–18 GHz). All of these characteristics are related to the unique nanoporous structure of SiO 2 aerogel and intrinsic nature of SiBNO fibers and SiO 2 aerogel. The prepared multifunctional SiBNO f /SiO 2 ACs have great potential to be used in harsh environment for thermal insulation and wave-transparent.
研究领域:
材料科学
·
航空航天工程
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Yaxuan Luo,Yanwei Wang,Yalong Liao,Ruo Qiang,Ye Yuan,Yu Ma,Xianxian Sun,Huibin Xu,Enshuang Zhang,Yibin Li
The substantial porosity and adaptability of ceramic aerogels render them promising for various applications. Nonetheless, the conventional compromise among volume density, mechanical properties and thermal stability constrains their applicability in specific contexts. In this study, we have developed and synthesized TiO 2 nanowire aerogels featuring a three-dimensional interlocking network structure. This design imparts the aerogels with exceptional characteristics, including ultra-lightness, high specific strength, and low thermal conductivity. The ceramic aerogels were synthesized through a straightforward hydrothermal reaction process. The resultant TiO 2 nanowire aerogels demonstrate exceptionally low volume densities, reaching values as low as 10 mg/cm 3 . They exhibit specific strengths up to 11 MPa/(g/cm 3 ) and possess remarkable thermal insulation properties, maintaining mechanical stability across a broad temperature range from −196 to 800 °C. Additionally, they feature an ultra-low thermal conductivity of 0.023 W/(m·K) in air. This study aims to advance the development of innovative designs for high-performance ceramic aerogels, thereby enhancing their applicability across various fields.
研究领域:
材料科学
·
热能工程
✓ 已验证
DOI
高影响因子
Polymer-Plastics Technology and Materials
·
2024
·
IF 2.6
Lu Guo,Shiwei Wang,Weizhen Xie,Xuan Wu,Bo Zhao,Man Liu,Chaolu Yin,Qian Li
In order to improve the thermal insulation and smoking properties of expanded vermiculite matrix composites, a kind of expanded vermiculite (EV)/chitosan (CS) composites was prepared by hot pressing. The effects of CS on smoke density, fire-resistance, insulation, and mechanical properties of the EV/CS composites were studied. The results show that with the increase of CS content, the smoke absorption performance and energy storage modulus of the composites is improved. Thermogravimetric (TG) analysis shows that the thermal stability of the EV/CS composite is improved by the presence of chitosan. The pores appear on the surface of the composites after the single-side fire-resistance test. After that, the thermal conductivity of the composites gradually decreases and the insulation performance is improved as the CS content increases. The CS carbonized during the preparation of the composites and thermal decomposition during the test. The morphology results show phase separation of the composites, and the porosity of the composites increases after the test. The reticular structure formed between the EV particles, sodium silicate, and CS molecules reduces the strength loss of the composites.
研究领域:
材料科学
·
火灾安全工程
✓ 已验证
产品关联
DOI
高影响因子
CONSTRUCTION AND BUILDING MATERIALS
·
2025
·
IF 8
Zhi Li,Shengjie Yao,Fang Zhou,Min Hu,Kai Shen,Miao Liu,Chuangang Fan,Xiaoxu Wu
This study develops sepiolite-based hydrophobic silica aerogel composites (SEP/SAs) to enhance thermal insulation and fire safety. The incorporation of sepiolite preserves the mesoporous structure of silica aerogels, resulting in composites with high porosity (93.1–96.1 %), low density (0.10–0.22 g/cm³), and low thermal conductivity (21–26 mW/(m∙K)). The SEP/SAs also exhibit strong hydrophobicity (contact angle > 120°) and significantly improved thermal stability, with increases of 206°C in onset temperature and 198°C in exothermic peak temperature. In addition, the composites show reduced calorific values (–50.8 %), heat release rates (–48.6 %), and CO/CO 2 emissions, alongside extended ignition times, indicating enhanced fire safety. This cost-effective approach to enhancing aerogel performance has promising applications in thermal insulation and fire protection, particularly for construction and industrial use.
研究领域:
材料科学
·
建筑与工业应用
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF NON-CRYSTALLINE SOLIDS
·
2025
·
IF 3.5
Zhi Li,Fang Zhou,Kai Shen,Min Hu,Miao Liu,Shengjie Yao,Zikang Chen,Qiong Liu,Chuangang Fan,Xiaoxu Wu
The rapid preparation of polymethylsilsesquioxane (PMSQ) aerogels via ambient pressure drying resolves the issues of organic solvent overconsumption and lengthy processing commonly encountered in the production of hydrophobic SiO 2 aerogels. However, macropore structures in MSQ aerogels diminish thermal insulation properties, limiting their broader application. This study employed a simple, clean, and controllable heat treatment technique to tailor the microstructure and surface chemical of MSQ aerogels, yielding SiO 2 aerogels with superior hydrophobicity, outstanding thermal insulation performance, and enhanced thermal stability. Specifically, through heat treatment at 600 °C in an argon atmosphere, MSQ aerogels demonstrate minimal morphological changes (2.5 % volume shrinkage), maintaining low density (0.066 g/cm³), high porosity, and excellent hydrophobicity. Notably, Reduced macropores optimize thermal conductivity (27.3 mW/m/K), while the partial decomposition of organic groups enhances thermal stability and lowers gross calorific value. This study offers a promising strategy for improving the thermal properties of MSQ aerogels and broadening their applications.
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
COMPOSITES COMMUNICATIONS
·
2025
·
IF 7.7
Longze Chen,Pengfei Xiang,Hao Tong,Sicheng Xin,Jiahao He,Wenbin Li,Chong He
Compared to dense glass fiber textiles, 3D spacer inorganic glass fiber fabrics offer significant advantages in terms of lightweight design, superior thermal insulation, and high-temperature resistance. However, intricate weaving process, high manufacturing costs, and limited strength of spacer fabrics pose significant challenges to their broader application. Herein, a polyurethane foam-reinforced glass fiber spacer fabric (GSFP) was developed to address these issues. An efficient fabrication strategy, encompassing glass fiber preparation, weaving, and structural refinement, was first developed to fabricate spacer glass fabrics with thicknesses ranging from 4 to 12 cm. Subsequently, the spacer glass fabric structure was resin reinforced using a hand lay-up technique and the infusion of hollow glass microsphere-reinforced polyurethane foam. With a 10 % microsphere concentration, polyurethane foam achieved an optimal balance between mechanical strength and thermal insulation. GSFP demonstrated a 7.1 % enhancement in mechanical performance and an 18 % improvement in thermal insulation properties. After five compression cycles, GSFP embedded with 10 % glass microspheres retained 85 % of its compressive strength. With its light weight, superior strength, thermal insulation, GSFP holds promise for sustained use in high-pressure and high-temperature environments.
研究领域:
材料科学
·
纺织工程
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
He Huang,Yanhong Lv,Xiangyu Jin,Hebing Wang,Can Wu,Yiwu Pan,Xiaojie Yan,Changqing Hong,Wenbo Han,Xinghong Zhang
Lightweight and flexible aerogels are highly demanded for thermal management in the burgeoning aerospace and artificial intelligence (AI) fields. However, the design and preparation of thermal insulating aerogels integrating good flexibility, low density, and superior thermostability through environmentally friendly methods remains challengeable. Herein, by introducing bifunctional silicone, a strategy of chain elongation assisted with pore structure adjustment is developed to achieve the flexibility of thermostable phenolic resin aerogel (PRA). The silicone introduction effectively suppresses the drying shrinkage, thus enabling the employment of ambient pressure drying (APD). The obtained flexible PRA combining high softness (elastic modulus 0.05 kPa), superior deformability (cyclic compressive strain > 60%, damage strain up to 80%), and good fatigue-resistance (compression at 40% strain > 1000 cycles) exhibits low bulk density (0.058 g·cm −3 ), and low thermal conductivity (0.033 W·m −1 ·K −1 ). With these superior properties, it can effectively serve for static thermal insulation below 200 °C with a thickness of 2–3 mm; more attractively, it can perform dynamic thermal management as a regulator through compressing and releasing (eg. temperature 41.9–57.6 °C, 0–40% compression strain, thickness of 30 mm). These merits make the material promising for AI thermal management in fields like outdoors, aerospace, and infrared camouflage.
研究领域:
材料科学
·
航空航天工程
·
热能工程
✓ 已验证
产品关联
DOI
高影响因子
CELLULOSE
·
2023
·Vol. 30
·期 15
·9563-9574
·
IF 5.7
Wang Zhixin,E Yuyu,Li Jie,Du Tingting,Wang Kun,Yao Xi,Jiang Jianxin,Wang Meng,Yuan Shengguang
Bacterial cellulose (BC) aerogels with ultralight, low density, and low thermal conductivity are hopeful candidates for environmentally friendly heat insulating materials. However, the application of BC in packaging and building as a heat nonconductor is seriously limited by its flammable characteristics. Hence, we report a moderate approach to fabricating a flame retardant and heat-insulating composite aerogel by introducing zinc borate (ZnB) particles into BC via an ultrasound-assistant deposition process. The in situ synthesis of ZnB particles resulted in the separation of single fibers from fiber bundles in BC instead of damaging its homogeneous porous structure, improving its thermal stability by weakening the convective intensity of heat rays. The heat release capacity of the prepared composite aerogel was only 8 J g −1 k −1 , exhibiting excellent flame retardancy. The probable mechanism proposed to be that the dehydration of ZnB particles lowered the surface temperature by releasing the bound water, and simultaneously produced metallic oxides (ZnO and B 2 O 3 ) for retarding the spread of heat and isolating the flammable fibrils within the combustion area. Besides above scientifical meaning on understanding the thermal insulation process, because of the natural and renewable substrate and the following simple modification process, the present approach has potential applications for industrial-scale production of green and flame retardant material.
研究领域:
材料科学
·
环境科学
·
生物技术
✓ 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）