MATERIALS CHARACTERIZATION
·
2022
·
IF 4.537
Yahui He,Shihong Zhang,Yi He,Hongjie Li,Teng He,Ruxia Song,Bo Liu,Zhifei Zhang,Yi Fan
Ni-P/α-ZrP composite coatings were successfully prepared by electroless plating, in which α-ZrP nanosheets were synthesized by reflow method. The surface morphology, element composition, structure and valence composition of the composite coating were analyzed by SEM, EDS, XRD and XPS, respectively. In the reciprocating friction experiment and electrochemical test, the corrosion and wear behaviour of the composite coatings were analyzed. The results show that α-ZrP nanosheets can significantly improve the corrosion and wear resistance of Ni P alloys. With the enrichment of α-ZrP nanosheets, the properties of coatings showed a tendency of increasing first and then slightly decreasing. Ni-P/α-ZrP (1.00 g/L) coating has the lowest porosity and the best corrosion resistance, and its corrosion rate (6.01 × 10 −3 mm/a) is about 1/5 of that of pure Ni P coating (3.12 × 10 −2 mm/a). Ni-P/α-ZrP (1.50 g/L) coating has the best wear performance, its average coefficient of friction (COF) is reduced from 0.568 to 0.167, and the specific wear rate is reduced from 7.13 ± 0.42 (× 10 −6 ) to 0.36 ± 0.06 (× 10 −6 ) (about 1/20 of pure Ni P coating).
研究领域:
材料科学
·
表面工程
·
电化学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2019
·
IF 8.355
Yang Li,Liubing Dong,Robert Patterson,Zhi Li Teh,Yicong Hu,Shujuan Huang,Chao Chen
All-inorganic perovskite quantum dots (PQDs) being characterized by high photoluminescence quantum yield, tunable emission colors and high color purity attract enormous attention in optoelectronic fields, especially as highly efficient narrow-band phosphors for lighting and next-generation display devices. However, poor stability seriously impedes their practical applications. Herein, we proposed an ion exchange/surface adsorption strategy to realize the room-temperature synthesis and stabilization of CsPbBr 3 PQDs on α-Zr(HPO 4 ) 2 ·H 2 O (zirconium phosphate, α-ZrP) nanosheets. The inherent characteristics of the α-ZrP nanosheets including high Pb 2+ adsorptivity and good Cs + ion exchange capability promoted the heterogeneous nucleation-growth and effective anchoring of CsPbBr 3 PQDs on α-ZrP surfaces. Consequently, the synthesized α-ZrP/CsPbBr 3 composite exhibited superior green-emitting performance and significantly enhanced humidity stability and thermal stability in comparison to pure PQDs and many other matrix-protected PQDs. All these favorable characteristics listed above endowed the α-ZrP/CsPbBr 3 composite with good optical properties for lighting and displays. This work opens up a new way to use inorganic nanomaterials to stabilize all-inorganic PQDs and can promote the scalable synthesis of PQDs with long-term stability for optoelectronic devices.
研究领域:
材料科学
·
光学工程
✓ 已验证
产品关联
DOI
高影响因子
Advanced Composites and Hybrid Materials
·
2022
·Vol. 5
·期 3
·1910-1921
·
IF 11.806
Wei Dan,Weng Mengman,Mahmoud M. H. H.,Elnaggar Ashraf Y.,Azab Islam H. El,Sheng Xinxin,Huang Mina,El-Bahy Zeinhom M.,Huang Jintao
Phase change materials (PCMs) have shown great application potential in sustainable energy utilization. The green preparation and efficient application are both focus of PCMs in research. In this paper, without any carbonized process under high temperature, bio-based sodium alginate (SA) and different content of ZrP nanosheets modified by PDA were used to prepare intrinsic framework materials (SA@ZrP) with sensitive lighting absorbance. Polyethylene glycol (PEG)/SA@ZrP with shape stability was fabricated via the vacuum impregnation method. Among them, CPCM5 (SA:PDA@ZrP = 50:50) exhibited excellent thermal storage and cycling stability. Compared with CPCM0 (SA:PDA@ZrP = 100:0), the melting enthalpy (159.8 J/g) and freezing enthalpy (159.3 J/g) of CPCM5 increased 16.8% and 15.4%, respectively. After 100 thermal cycles, there was no significant difference in the latent heat during meting (159.02 J/g) and freezing (157.36 J/g) process. Superior light-thermal performance of CPCM5 also performed during photothermal conversion. Therefore, with the environmentally friendly and low-cost prepared process while excellent thermal properties, PEG/SA@ZrP shows widen application prospects in the photothermal storage and conversion field. Graphical abstract
研究领域:
材料科学
·
能源工程
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
POLYMERS FOR ADVANCED TECHNOLOGIES
·
2019
·Vol. 31
·期 3
·602-615
·
IF 2.162
Jiaxin Li,Xuejun Lai,Hongqiang Li,Xingrong Zeng,Yuncong Liu,Yunsheng Zeng,Changcheng Jiang
The combination of catalyzing carbonization and free-radical quenching mechanism is proposed to be a promising strategy for the preparation of high-efficiency flame-retardant polypropylene (PP). Herein, a novel functionalized zirconium phosphate (RQZrP) nanosheet with free-radical quenching capability was fabricated by decorating macromolecular N-alkoxy hindered amine (MNOR) onto the surface of ZrP. It was combined with an intumescent flame retardant (IFR) to flame-retard PP. The results showed that there was a good synergism between RQZrP and IFR, which effectively improved the fire safety of PP. When the content of RQZrP was 2 wt% and IFR was 23 wt%, the limiting oxygen index (LOI) of PP increased from 19.0% to 33.0%, and it achieved a UL-94 V-0 rating. Meanwhile, the peak heat release rate (PHRR), total heat release (THR), carbon monoxide production (COP), and carbon dioxide production (CO 2 P) were significantly decreased. It revealed that nitroxyl radicals generated by RQZrP could capture alkyl radicals and peroxy radicals that produced during the degradation and combustion of PP. Meanwhile, RQZrP acted as a solid acid that catalyzed PP chains rapidly cross-linking to form char on its surface, and it also played as a supporting skeleton to enhance the strength and compactness of the char layer, thus effectively preventing the transmission of heat, oxygen, and combustible gases.
研究领域:
材料科学
·
高分子化学
·
燃烧与防火研究
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）