CONSTRUCTION AND BUILDING MATERIALS
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2025
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IF 8
Juncheng Wen,Yan Wan,Yingzi Yang
Most durability issues in cement-based materials stem from water intrusion, which can be mitigated by hydrophobic materials with excellent waterproofing properties. This study proposes a green wet chemical method using stearic acid (SA) and waste glass powder (WGP) to synthesize hydrophobic WGP (HWGP). The effect of SA dosage on the water contact angle of HWGP was investigated, and the optimal SA dosage for preparing HWGP was determined through TG analysis. XRD, FTIR, XPS, and TEM tests revealed the synthesis mechanism of HWGP. The effects of HWGP on mortar's mechanical properties, water and frost resistance were also studied, and the optimal dosage of HWGP for preparing hydrophobic mortar was determined. The results show that 8 % SA is optimal for preparing HWGP, and its water contact angle is 132.2°. The synthesis occurs through reactions between SA and Na + , Ca 2+ , and Si-OH groups, with the long carbon chains of SA grafted onto WGP, forming a hydrophobic layer about 4 nm thick. As HWGP content increases, compressive strength initially increases and then decreases, while water and frost resistance improve significantly. The optimal dosage for preparing hydrophobic mortar is 15 % HWGP, where compressive strength decreases by only 6.9 %, flexural strength increases by 12.5 %, and water contact angle increases by 91.2°. Additionally, initial and secondary water absorption rates decrease by 79.4 % and 92.2 %, respectively, total water absorption amount over 8d decreases by 64.9 %, and frost resistance improves by 70.9 %.
研究领域:
建筑材料
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化学工程
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土木工程
✓ 已验证
产品关联
DOI
高影响因子
Frontiers in Materials
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2024
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IF 2.6
Yu Xianglei,Li Wei,Sun Hu,Qian Zhuo,Li Junpeng,Yu Yang,Gan Guoyou
The Te-based glass powder exhibits distinctive characteristics such as a low melting temperature and high chemical stability, rendering it a focal point of research in the realm of glass powder applications for solar cells. In this investigation, a pioneering Ge-containing Te-based lead-free glass powder was synthesized, and the influence of GeO2 content on critical parameters such as glass transition temperature (Tg), high-temperature fluidity, high-temperature wettability, acid and alkali resistance, as well as the network structure of the glass, was systematically explored. At an optimal GeO2 content of 8%, the glass powder displayed the lowest Tg (437°C), accompanied by a subdued crystallization reaction. The high-temperature fluidity and wettability exhibited favorable characteristics, indicating that the inclusion of GeO2 in the glass powder resulted in an enhanced interface contact. Building upon this foundation, techniques to augment the Ag+ content within the glass powder were investigated, along with the interaction between Ag+ and the SiNx anti-reflection layer or silicon on the surface of crystalline silicon solar cells. It was discerned that the Ag+ content in the glass powder significantly influences the deposition of silver microcrystals on the surface of crystalline silicon, thereby impacting the contact resistance of the solar cell. Then influences the series resistance and photoelectric conversion efficiency of the solar cell.
研究领域:
材料科学
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能源科学
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
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2024
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IF 5.1
Dewei Ma,Panli Zhu,Jun Huang,Xiuhua Cao
The research on low-temperature lead-free glass is of great significance for the miniaturization, integration and intelligence of current electronic products, as well as environmental protection. In this article, we report the preparation of low-temperature lead-free B 2 O 3 -BaO-ZnO-SiO 2 -Al 2 O 3 -TeO 2 glasses by a melt-quenching technique. With the increase of TeO 2 content in glass, the glass transition temperature and melting temperature of sintered glass powder decrease, while its wettability and acid corrosion resistance show an increasing trend. The application of glass powder in the sintering experiment of terminal electrode slurry further proves this viewpoint. Compared with the poor sintering performance of the slurry with TeO 2 -free glass powder, the slurry containing TeO 2 glass powder forms a very dense sintered solid, and the sintered slurry is tightly bonded to the ceramic substrate .
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
PROGRESS IN ORGANIC COATINGS
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2024
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IF 6.5
Chao Yan,Yiqun Fang,Ruofan Yang,Mengfan Yan,Weihong Wang,Yongming Song,Qingwen Wang
A novel organic-inorganic hybrid ceramicizable intumescent coating was developed for enhancing the fire safety of wood. Firstly, an amino resin modified with allyl glycidyl ether (PMFG) was reacted with tannic acid (TA) and phytic acid (PA) to prepare a nitrogen and phosphorus containing organic coating resin (PTP). Simultaneously, glass powders (GPs) or silica (SiO 2 ) were incorporated to form an organic-inorganic hybrid coating, which was then applied to the surface of wood in a specific sequence. When exposed to flames, the coating forms a lava-like ceramic char layer, providing effective protection for wood against flame damage. The results of the fire performance tests showed that the coated wood had excellent fire retardancy (LOI = 49.8) and that the total heat release (THR), total smoke production (TSP) and carbon monoxide production rate (P co ) of the optimal coating were reduced by 78.77 %, 78.88 % and 41.67 % compared to the pure PTP coating. This research provides a cost-effective solution for improving the fire safety of wood in modern construction.
研究领域:
材料科学
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火灾安全工程
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
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2025
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IF 6.9
Zihan Zhao,Chunfeng Li,Ruiwen Yu,Lei Le,Mingli Liu,Zhihao Zhang
In order to improve the fire safety performance of wood, an explainable ceramicized organic–inorganic hybrid flame retardant coating was prepared in this study. An organic flame retardant containing nitrogen and phosphorus was first prepared by reacting phytic acid and melamine, followed by the introduction of glass powder and boron nitride to form an organic–inorganic hybridized coating. When the wood is exposed to flame, the coating forms a lava-like ceramic char layer that protects the substrate. Flame retardant test data show that the coating exhibits excellent flame retardancy with an limiting oxygen index of 36.3 %. Compared with pure wood, the peak heat release rate (pHRR) and total heat release (THR) of wood coated with a hybrid coating were significantly reduced by 64.7% and 31.3%, respectively. Furthermore, when coated wood is used in outdoor construction, its fire resistance is far superior to that of pure wood. This study provides an economical and effective solution to enhance the fire safety of wood in modern buildings.
研究领域:
消防安全工程
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材料科学
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高分子科学
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陶瓷工程
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2025
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IF 13.2
Cuiping Xu,Xiaofan Sun,Peiqi Ji,Min Zhao,Tingfeng Li,Peng Chen,Hong-Ling Cai,X.S. Wu
Electrocaloric refrigeration technology presents a promising approach for cooling systems by cyclic processes of applying and removing an electric field to ferroelectric materials. However, dielectric breakdown remains a significant challenge in achieving a substantial temperature change. Chemical modification strategies aimed at enhancing breakdown strength by reducing grain size, but it also suppresses ferroelectric polarization, detrimental to electrocaloric performance. In this study, we addressed this issue by successfully achieving high breakdown strength and significant polarization in 0.3Pb(Mg 1/2 W 1/2 )O 3 -0.3Pb(Ni 1/3 Nb 2/3 )O 3 -0.4PbTiO 3 (PMW-PNN-PT) material by filling large grain gaps with small grains through glass powder doping. Specifically, at an optimized proportion of 0.7 wt% of the glass powder, the maximum electric field in the electrocaloric effect measurements via the direct method increased from 20 kV/cm to 50 kV/cm, and the corresponding electrocaloric temperature change rose from 0.21 K to 0.6 K. This approach represents a novel method to simultaneously enhance breakdown strength and polarization, resulting in a remarkable improvement in the electrocaloric performance.
研究领域:
材料科学
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铁电学
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制冷技术
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能源材料
✓ 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）