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
CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Zhen Wang,Hairui Zhao,Ding Dai,Haoquan Hao,Zhijiang Wang
SiC aerogel is a novel candidate for electromagnetic absorption (EMA) materials in extreme environments because of its ceramic nature and aerogel morphology. In this study, graphene oxide (GO), which having has been generally serving served as a “brick” in the material community, was used as a building block to prepare SiC aerogel precursors and further develop a novel and designable route for preparing SiC aerogel for EMA. The experimental results suggested that the GO aerogel was well converted into a SiC aerogel with ultra-low density (<4 mg cm −3 ). The synthesized SiC aerogel inherited the precursor well in structure while having a wide absorption band (approximately 5.5GHz) and a high absorption frequency-to-thickness correlation different from traditional SiC aerogels. The above idea for designing and assembling SiC aerogels will significantly broaden the practical applications of GO and SiC in EMA, supercapacitors and sensors.
研究领域:
材料科学
·
电磁学
✓ 已验证
DOI
高影响因子
FUEL
·
2025
·
IF 7.5
Zhenyong Li,Yang Zhou,Da Zhang,Min Xu,Rui Li,Xianyan Ren
The tunable and control-released hydrophobicity of ultra-low-density proppants (ULDPs) is crucial for their migration, distribution and oil conductivity in hydraulic fracturing technology. To develop this kind of smart ULDPs, a novel functional monomer (PI-KH570) was designed and synthesized as an organic silane by copolymerization of isoprene and KH570, which will take part in copolymerization with styrene and divinyl benzene in a suspension polymerization. Surface wettability of the resulted microspheres (named as SFR-SDB) was studied according to contact angles, which can change from neutral (approximately 89°) to hydrophobicity (∼119°) in a wide time range of 1 ∼ 12 h by designing the chain structure of the PI-KH570, and even to super-hydrophobicity (∼155°) in 0 ∼ 60 min by further designing and adding others organic silane as tuning agents. Mainly based on results from electrical conductivity changes, TEM and SEM images, the wide-range tunable and control-released hydrophobicity of the SFR-SDB comes from controllable sol–gel reaction rate of the PI-KH570. Furthermore, the SFR-SDB exhibited ultra-low apparent density of approximately 1.017 g/cm 3 but high compressive strength, which show a low crushing ratio of ∼1.97 % at a closure pressure of 69 MPa.
研究领域:
材料科学
·
石油工程
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2023
·Vol. 33
·期 52
·2309148
·
IF 19
Yingying Cheng,Bingjie Ma,Peiying Hu,Junxiong Zhang,Dongmei Hu,Jin Wang
Effective thermal superinsulation in extremely high temperatures (EHT) is crucial for aerospace, industrial, and civilization activities. However, current strategies relying on ceramic materials face limitations due to their high thermal conductivity and brittleness in specific conditions. In this study, a feasible and scalable method for synthesizing a flexible, lightweight, and transformable fire-reborn silica-alumina hybrid ceramic aerogel (FR-SACA) is presented, which is achieved by rearranging silica aerogel microparticles and Al 2 O 3 ceramic fibers using a self-sacrifice polymer, resulting in a bio-inspired bird nest structured FR-SACA. The SACA exhibits exceptional properties, including an ultra-low density of 0.01 g cm −3 , a low thermal conductivity of 0.029 W m −1 K −1 , and a reversible compression of up to 80%. Notably, a 20 mm-thick FR-SACA demonstrates a remarkable temperature reduction of 1179.6 °C when exposed directly to a 1300 °C flame, suggesting its potential as a thermal superinsulation material in EHT environments. Furthermore, the transformability of SACA enables in situ fabrication on surfaces with diverse heteromorphic structures, such as flat, bent, and angled shapes, thereby providing thermal superinsulation for various constructions. The Phoenix Nirvana process opens up new possibilities for synthesizing ceramic aerogels with desirable flexibility and adaptive properties, facilitating effective thermal management under extreme conditions.
研究领域:
材料科学
·
航空航天工程
·
热管理技术
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Ruyi Sha,Bingzhu Wang,Jixiang Dai,Jianjun Sha
Ceramic aerogels are promising high-temperature thermal insulation materials due to their outstanding thermal stability and oxidation resistance. However, restricted by nanoparticle-assembled network structures, conventional ceramic aerogels commonly suffer from inherent brittleness, volume shrinkage, and structural collapse at high temperatures. Here, to overcome such obstacles, 3D ultralight and highly porous carbon tube foams (CTFs) were designed and synthesized as the carbonaceous precursors, where melamine foams were used as the sacrificial templates to form the hollow and thin-wall network structures in the CTFs (density: ∼4.8 mg cm–3). Then, the arbitrary-shaped silicon carbide (SiC) nanofibrous aerogels (SNFAs) were obtained through a simple chemical vapor deposition (CVD) process on the CTFs. The resulting SNFAs exhibited excellent comprehensive performances: ultralow density (4.2 mg cm–3) and thermal conductivity (21.3 mW m–1 K–1 at room temperature), excellent rigidity (specific modulus: 13.2 kN·m kg–1), and resilient compressibility. The SNFAs could support over 2100 times their weight without visible deformation. Furthermore, the SNFAs also showed exceptional high-temperature thermal stability, which means that they could withstand 1100 °C in an air atmosphere and 1550 °C in an inert atmosphere. These superior comprehensive performances enable SNFAs to be suitable for thermal insulation in harsh environments.
研究领域:
材料科学
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2019
·
IF 6.361
Qun Liu,Shasha Li,Haihuan Yu,Fanming Zeng,Xiao Li,Zhongmin Su
Composites of MOFs and aerogels (MOFACs), as a new class of nanostructured materials , attract increasing attention due to their favorable adsorption properties. Herein, UiO-66-NH 2 -CS aerogel monolith (UNCAM) was synthesized by covalent crosslinking with hierarchical structure, exhibiting effective and stable adsorption of Pb(II) ions. The aerogel monolith containing 50% MOF particles possesses a ultra-low density of 15.8 mg·cm −3 , which is mainly attributed to the highly porous structure. Meantime, UNCAM can be described more suitable by the pseudo-second-order model and shows a higher mass transfer rate. The highest Pb(II) adsorption capacity of aerogel monolith is up to 102.03 mg·g −1 (1.612 × 10 6 mg·m −3 ), which is comparable to literature reports. The adsorption of Pb(II) by UNCAM is an endothermic and spontaneous process and consistent with the Langmuir model, indicating that the adsorption process belongs to monolayer adsorption and chemisorption . Furthermore, the adsorption mechanisms of coordination interaction between N and Pb (II) were confirmed, and the O also played a synergistic role in adsorption on a certain degree. Lastly, The UNCAM retained 90.12% adsorption ability after three cycles. This strategy may provide an effective and versatile pathway to convert the bulk MOF particles into a shapeable form and sequentially branch out their applications in pollutant treatment fields.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Advanced Science
·
2022
·Vol. 9
·期 16
·2201118
·
IF 17.521
Minghang Li,Wenjie Zhu,Xin Li,Hailong Xu,Xiaomeng Fan,Hongjing Wu,Fang Ye,Jimei Xue,Xiaoqiang Li,Laifei Cheng,Litong Zhang
Heterogeneous interface design to boost interfacial polarization has become a feasible way to realize high electromagnetic wave absorbing (EMA) performance of dielectric materials. However, interfacial polarization in simple structures such as particles, rods, and flakes is weak and usually plays a secondary role. In order to enhance the interfacial polarization and simultaneously reduce the electronic conductivity to avoid reflection of electromagnetic wave, a more rational geometric structure for dielectric materials is desired. Herein, a Ti 3 C 2 T x /MoS 2 self-rolling rod-based foam is proposed to realize excellent interfacial polarization and achieve high EMA performance at ultralow density. Different surface tensions of Ti 3 C 2 T x and ammonium tetrathiomolybdate are utilized to induce the self-rolling of Ti 3 C 2 T x sheets. The rods with a high aspect ratio not only remarkably improve the polarization loss but also are beneficial to the construction of Ti 3 C 2 T x /MoS 2 foam, leading to enhanced EMA capability. As a result, the effective absorption bandwidth of Ti 3 C 2 T x /MoS 2 foam covers the whole X band (8.2–12.4 GHz) with a density of only 0.009 g cm −3 , at a thickness of 3.3 mm. The advantages of rod structures are verified through simulations in the CST microwave studio. This work inspires the rational geometric design of micro/nanostructures for new-generation EMA materials.
研究领域:
材料科学
·
电磁吸收
·
纳米材料
·
介电性能
✓ 已验证
DOI
高影响因子
Journal of Advanced Ceramics
·
2022
·Vol. 11
·期 8
·1235-1248
·
IF 11.534
Song Limeng,Fan Bingbing,Chen Yongqiang,Gao Qiancheng,Li Zhe,Wang Hailong,Zhang Xinyue,Guan Li,Li Hongxia,Zhang Rui
Multifunctionalization is the development direction of personal thermal energy regulation equipment in the future. However, it is still a huge challenge to effectively integrate multiple functionalities into one material. In this study, a simple thermochemical process was used to prepare a multifunctional SiC nanofiber aerogel spring (SiC NFAS), which exhibited ultralow density (9 mg/cm 3 ), ultralow thermal conductivity (0.029 W/(m·K) at 20 °C), excellent ablation and oxidation resistance, and a stable three-dimensional (3D) structure that composed of a large number of interlacing 3C-SiC nanofibers with diameters of 300–500 nm and lengths in tens to hundreds of microns. Furthermore, the as-prepared SiC NFAS displayed excellent mechanical properties, with a permanent deformation of only 1.3% at 20 °C after 1000 cycles. Remarkably, the SiC NFAS exhibited robust hyperelasticity and cyclic fatigue resistance at both low (∼−196 °C) and high (∼700 °C) temperatures. Due to its exceptional thermal insulation performance, the SiC NFAS can be used for personal thermal energy regulation. The results of the study conclusively show that the SiC NFAS is a multifunctional material and has potential insulation applications in both low- and high-temperature environments.
研究领域:
材料科学
·
纳米技术
·
热能工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2022
·Vol. 139
·期 29
·e52647
·
IF 3.057
Jinrong Yin,Yunlei Gong,Huaan Zheng,Hui Yuan,Zhen Zeng,Wei Qin,Chenghao Li,Yang Zhou,Xianyan Ren
Ultra-low-density proppants are of great significant in slick water fracturing system, but the polymer composite microspheres can hardly promise the quality of oil and gas due to their poor hydrophobicity. To address the issue, we prepared several types of modified styrene-divinyl benzene copolymer microspheres (MSDBs) with long-term durable hydrophobicity and high strength, including O-MSDBs (hydrophobic MSDBs), LO-MSDBs (long-time hydrophobic MSDBs), and CO-MSDBs (coated O-MSDBs) on the basis of a molecular structure of “KH570-styrene (St)-divinyl benzene (DVB)” copolymer. In this article, the design concept and the structure of MSDBs was clarified, and performances of MSDBs are systematically discussed and compared with commercially available hydrophobic microspheres. The O-MSDBs, a kind of nanoparticle patterned St-DVB copolymer microspheres, were prepared by a one-step suspension polymerization undergoing a sol–gel process, showing strong hydrophobicity with a water contact angle up to 140.7°, but short durability in strong hydrochloric acid or hydrofluoric acid; On the contrary, LO-MSDBs perform better in the stability and durability of hydrophobicity with a slightly lower water contact angle about 135.9°. The LO-MSDBs were designed by coating functionalized St-DVB copolymer microspheres with fluororesin. Similarly, CO-MSDBs from fluororesin-coated O-MSDBs were designed. As expected, CO-MSDBs have a stronger hydrophobicity (139.0°) than LO-MSDBs and longer durability than O-MSDBs. Moreover, the MSDBs exhibit better properties than the commercially available hydrophobic polymer and ceramic microspheres.
研究领域:
材料科学
·
石油工程
✓ 已验证
DOI
高影响因子
POLYMER COMPOSITES
·
2023
·Vol. 44
·期 12
·8454-8464
·
IF 5.2
Wei Qin,Yushan You,Yu Song,Jinrong Yin,Yang Zhou,Zhenyong Li,Zhen Zeng,Min Xu,Wenjiao Chen,Xianyan Ren
The polymer ultra-low-density proppants are critical to the development of slick-water fracture technology, but which were prone to obvious deformation under high pressure in the fractures. To increase the stiffness of the styrene-divinylbenzene copolymer (SDB) and obtain desired ultra-low-density (ULD) proppants, carbon dots (CDs) were introduced in-situ considering their characteristics as the zero-dimensional carbon nanomaterial. Taking the compressive strength and axial deflection, and so forth into consideration, the synthesis conditions of CDs modified SDB microspheres (CDs-SDBs) were optimized. Taking the graphite modified SDBs (MG-SDBs) as a reference, the density of CDs-SDBs did keep almost constant at about 1.1800 ~ 1.1899 g·cm −3 with the increase of CDs amount. The CDs-SDBs not only possess high-peak pressure (41.5 N) but also minute axial deflection (0.090 mm). The advantages of CDs-SDBs over MG-SDBs become even more pronounced under higher pressure, which can withstand closure pressure of 80 MPa with a small crush ratio of 4.47%. CDs-SDBs exhibit significant photoluminescence performances with maximum excitation and emission wavelengths of 634 nm and 554 nm. Highlights CDs-SDBs as ULD proppants with high strength and anti-deformation were developed. Advantages of CDs-SDBs become more pronounced under high-closure pressure. With increasing of CDs amount, apparent density of CDs-SDBs keep almost constant. Axial deflection of CDs-SDBs is only 0.09 mm under 41.5 N. The crush ratio is only 4.47% under 80 MPa closure pressure.
研究领域:
材料科学
·
石油工程
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
Polymer Chemistry
·
2017
·Vol. 8
·期 36
·5474-5480
·
IF 5.375
Qi Zhang,Chengjian Wang,Milin Fu,Jianli Wang,Shiping Zhu
This paper reports the first Pickering high internal phase emulsion (HIPE) system stabilized solely by worm-like nanoaggregates. The cross-linked worms were prepared from the dispersion polymerization of benzyl methacrylate (BzMA), with poly(dimethylamino ethyl methacrylate) (PDMA) macro-CTA as the stabilizer and ethylene glycol dimethacrylate (EGDMA) as the cross-linker, through polymerization-induced self-assembly (PISA). The effects of the internal phase type and volume, as well as the worm concentration on the stability of the resulting Pickering HIPEs were investigated. Furthermore, by adding a small amount of silica nanoparticles or magnetic nanoparticles as the binder in the continuous aqueous phase, followed by freeze-drying, 3D hierarchical porous monoliths of ultralow density were successfully prepared. This work demonstrated that Pickering HIPE templating provides a facile approach for the preparation of ultra-light functional hybrid porous materials, which have good potential in various application areas.
研究领域:
高分子化学
·
胶体与界面科学
·
功能材料
·
纳米科技
·
多孔材料
✓ 已验证
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2024
·
IF 3.8
Danlong Yang,Yingzhe Liu,Yuling Shi,Qianqian Pan,Yangeng Lan,Jianhong Xu,Tao Wang
Silica aerogel microspheres are known for their unique features which are better than those of the bulk silica aerogel, including excellent biocompatibility and flowability, and have a broader application prospect for biomedicine, adsorption purification, catalytic reactions, energy storage, and sensing. However, the production of high-quality silica aerogel microspheres still poses significant challenges, such as low sphericity, difficult size adjustment, uneven morphology, and a prolonged drying process, especially ambient pressure drying for several hours. Herein, we report a novel process for efficiently synthesizing high-quality silica aerogel microspheres through the use of microfluidic and ambient pressure drying techniques. In the novel process, the colloidal sol microdroplets were prepared in stepped T-microchannels to achieve size adjustment with a narrow diameter distribution and good sphericity. A new drying process under ambient pressure at high temperature was proposed, which realized the rapid drying under ambient pressure for 10 min while the linear shrinkage of the microspheres was less than 5%. Highly spherical and uniform silica aerogel microspheres with diameters adjustable from 50–300 μm were successfully fabricated. The prepared silica aerogel microspheres exhibited high mesoporosity along with ultralow density, high specific surface area, and high hydrophobicity. In addition, the factors that significantly influence the final morphology of the silica aerogel microspheres have been thoroughly researched. This innovative process offers a new approach for the efficient synthesis of high-quality silica aerogel microspheres.
研究领域:
材料科学
·
化学工程
·
纳米技术
·
生物医学工程
✓ 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）