International Journal of Applied Ceramic Technology
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2022
·Vol. 20
·期 1
·251-260
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IF 2.328
Fada Wei,Qinghua Liu,Heqiang Liu,Guohong Wang,Minghang Li,Mingxing Li,Xingmin Liu
The proliferation of electronic devices and wireless communication is leading to serious electromagnetic (EM) interference. In this work, Ti 3 C 2 /cement composites were developed as high efficiency EM functional materials by introducing exfoliated Ti 3 C 2 T x MXene with cement for green buildings with EM shielding function. In the composites, few-layered Ti 3 C 2 MXene were dispersed homogeneously throughout the cement matrix. The EM properties of the composites were studied as a function of the MXene content. With increasing MXene content, real and imaginary part of permittivity was significantly improved owing to the polarization and electrical conduction caused by the MXene phase. Composites with 15 wt.% MXene showed good EM absorbing properties with a maximum effective absorbing bandwidth of 2.67 GHz. Strong EM shielding can be achieved when MXene content increased to 25 wt.%. The EM shielding effectiveness of such composites was higher than 22.0 dB, and the dominating shielding mechanism was EM absorption. This work finds new materials for the development of advanced green buildings with EM shielding function.
研究领域:
材料科学
·
电磁工程
·
土木工程
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Jiajun An,Xiaofan Ping,Gang Gao,Qinghe Shen,Zhiqiang Wang,Cunfu Zhang,Haitang Bu,Zizhen Lin,Congliang Huang
To explore high-performance thermal insulation materials for green buildings, the sodium-alginate/chitosan (AC) biomass aerogel was firstly prepared, which has a potential advantage of low thermal conductivity and also low price. Then, the montmorillonite (MMT) was further coated on the pore surface of the AC aerogel to improve its poor flame-retardancy performances. This new aerogel is called ACMMT. Finally, the flame-retardant, mechanical and thermal insulation performances of ACMMT aerogels were analyzed. Results turn out that: The limiting oxygen index of ACMMT with a MMT content of 70 wt% (ACMMT-70 %) is increased by 205 % times compared to that of the AC aerogel, and the mass-loss rate of ACMMT-70 % is only about 13.8 %. This enhanced flame-retardant performance of ACMMT can be explained by the MMT isolation layer formed on the pore surface of AC aerogel, hindering the spread of oxygen and heat, thus restricting the spread of flames. The mechanical performance of ACMMT aerogel is also improved, because of the hydrogen bond formed between MMT and AC, which can better support the skeleton structure. The thermal conductivity of ACMMT-70 % aerogel is about 0.0384 W m −1 K −1 , much lower than that of most existing commercial materials. Importantly, when the ACMMT-70 % aerogel is heated by a 100 °C heat source, the upper surface of the ACMMT-70 % aerogel could maintain a temperature of 37 °C for a long time, showing excellent thermal insulation performance.
研究领域:
材料科学
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化学工程
·
建筑材料
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高分子科学
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消防安全工程
✓ 已验证
产品关联
DOI
高影响因子
Materials Today
·
2025
·
IF 22
Feng Gu,Xianhao He,Youhang Wei,Xiuxue Niu,Zhaosheng Cai,Bo Jiang,J.Y. Zhu,Wangxia Wang
This study presents a novel approach to fabricate wood composites with exceptional flame retardancy, superior strength and toughness, as well as superhydrophobic/self-cleaning properties. The fabrication process involves densifying delignified wood pre-impregnated with a nitrogen-phosphorus flame retardant via hot-pressing, followed by an adhesive-free, self-curing superhydrophobic dip-coating. The resulting wood exhibits remarkable synergistic performance: exceptional flame retardancy, with peak heat release rate (pHRR) and total heat release (THR) decreased by 77.7 % and 63.6 %, respectively, compared with pristine wood; superhydrophobicity/self-cleaning with a water contact angle (WCA) of 161.2° and sliding rolling off angle (SA) of 3.9°; and outstanding mechanical performance with a tensile strength of 439 MPa and fracture toughness of 8.7 MJ/m 3 . Notably, this innovation addresses two critical challenges in fire-retardant wood technology—preventing flame retardant leaching and eliminating flammable adhesives—thereby offering a scalable method for the commercial production of high-performance wood composites suitable for applications in green architecture, transportation, and safety–critical infrastructure.
研究领域:
材料科学
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阻燃技术
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木材科学
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表面工程
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复合材料
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL CROPS AND PRODUCTS
·
2024
·
IF 5.6
Zhenju Bi,Xinqi Gao,Zhencui Bi,Li Yan,Yafang Lei,Chan Li
The wood used for construction should be able to cope with complex environments, especially water and decay fungi. To enhance the wood’s decay resistance and hydrophobicity, aromatic aldehydes such as vanillin, cinnamaldehyde, syringaldehyde, or protocatechualdehyde were grafted onto wood. The poplar ( Populus tomentosa Carr.) wood was impregnated with (3-aminopropyl) triethoxysilane (APTES) to aminate its cell wall, and then aromatic aldehydes were grafted onto the aminated wood through a Schiff base reaction. The findings indicated that this technique enhanced the leaching resistance of aromatic aldehydes in the wood. Furthermore, the durability level of wood grafted by vanillin or cinnamaldehyde was very durable (mass loss<5 %) even after the leaching test. Modified wood has hydrophobicity, manifested by strong anti-swelling efficiency (ASE), low equilibrium moisture content (EMC), and high water contact angle (>90°, air-dried) in 65 % relative humidity and saturated environments. The characterization of modified wood and its model compounds indicated that aromatic aldehydes were grafted onto the hydroxyl groups of wood through Schiff base under the mediation of APTES. This study obtained an outdoor green building wood with hydrophobic and decay resistance for outdoor use and expanded the application of aromatic aldehydes in wood.
研究领域:
材料科学
·
木材科学与技术
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环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Xin Li,Jie Geng,Shengli Niu
Promoting the resource utilization of industrial solid waste is vital for achieving low-carbon development. Leveraging the high silicate content in coal-biomass co-combustion ash (CBCA) and retired photovoltaic glass (RPVG), this study utilized the co-sintering method to prepare ultra-lightweight ceramsite. The effects of raw material ratio, sintering parameters, and silicon carbide (SiC) addition on the characteristics and microstructure of the ceramsite were investigated, along with the assessment of CO 2 emissions. The optimal performance was obtained by sintering at 1150 °C for 15 min with 80 wt% CBCA to 20 wt% RPVG. During sintering, the amorphous phase and quartz in the raw materials melted to form liquid phase, which trapped gases generated by the high-temperature oxidation of SiC to facilitate pore formation. Concurrently, silicates in the liquid phase reacted with aluminum, sodium, calcium, and magnesium ions to crystallize into albite, anorthite, and diopside, which enhanced the mechanical properties of the ceramsite. Controlled addition of SiC promoted foaming reaction and pore formation, but excessive additions of SiC reduced the structural stability. Under the optimal sintering conditions, the ceramsite with 2 wt% SiC addition exhibited the bulk density of 0.46 g/cm 3 , apparent density of 1.06 g/cm 3 , compressive strength of 9.06 MPa, and 1h-water absorption of 3.73 %. This study demonstrates the feasibility of using CBCA and RPVG to prepare the ultra-lightweight ceramsite with reduced CO 2 emissions, offering an eco-friendly solution for solid waste valorization and green construction applications.
研究领域:
材料科学
·
环境工程
·
陶瓷材料
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废弃物资源化
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绿色建筑
✓ 已验证
产品关联
DOI
高影响因子
Journal of Energy Storage
·
2022
·
IF 8.907
Dongguang Yan,Shilong Zhao,Chi Ge,Jianzhou Gao,Chengyu Gu,Yingqiang Fan
The complicated preparation process and difficulty of recycling were serious obstacles to the widespread use of solid-solid phase change materials (PCMs). Herein, we reported a novel thermoplastic solid-solid PCMs prepared by a facile one-step feeding method. In this study, the esterification and transesterification among the molten mixture of PBT , PEG and adipic acid were conducted to prepare thermoplastic PEG/PBT/Adipic acid copolymer-based PCMs. Adipic acid, as an auxiliary encapsulation agent, could prevent effectively PEG leakage of PEG/PBT/Adipic acid copolymer-based PCMs with high PEG and low PBT content during the phase change process . For PCM-6 containing 91 wt% PEG, 8 wt% PBT and 1 wt% adipic acid, there were no changes in the shape and chemical structure after multiple thermal cycles. The TG results presented that the initial thermal degradation temperature of PCMs-6 was above 200 °C, which was much higher than the processing and working temperature of PCMs-6. The latent heat of PCMs-6 could reach 136.8 J/g, showing great potential for energy storage, especially in the field of green buildings.
研究领域:
材料科学
·
高分子化学
·
能源材料
·
热功能材料
·
绿色建筑
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）