Nanomaterials
·
2023
·Vol. 14
·期 1
·76
·
IF 5.3
Ziqi Lv,Kai Ren,Tao Liu,Yunyan Zhao,Zhonghua Zhang,Guicun Li
The rupture of a micro/nano container can trigger the release of repair agents and provides the coating with a self-healing and anti-corrosion effect. However, the defect and inhomogeneity of the coating, produced by the rupture of the micro/nano container, may weaken its anti-corrosion performance. This study reports a rare protection mechanism, which optimizes the space occupying of zirconium phosphate, and the de-doping peculiarity of polyaniline without the rupture of the micro/nano container. Polyaniline/α-zirconium phosphate composites were constructed through in situ oxidation polymerization. Repair agents were added in the form of doped acids. According to the different repair agents in polyaniline/α-zirconium phosphate composites (citric ion, tartaric ion and phytic ion), the performance and protection mechanism of the composites were researched. Polyaniline/α-zirconium phosphate coating (with phytic ion) shows an excellent self-healing anti-corrosive effect, due to the large spatial structure and abundant chelating groups of the precipitation inhibitor. Considering the anti-corrosive application, the developed polyaniline/α-zirconium phosphate composite has a far-reaching influence on marine development.Keywords:polyaniline;α-zirconium phosphate;phytic acid;anti-corrosion;self-healing
研究领域:
材料科学
·
腐蚀与防护
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Friction
·
2019
·Vol. 8
·期 4
·695-707
·
IF 3
Jiang Feng,Sun Haoyang,Chen Lei,Lei Fan,Sun Dazhi
Inorganic nanomaterials exhibit superior friction-reduction and anti-wear properties in oils. In this study, 2D layered α-zirconium phosphate (α-ZrP) nanosheets intercalated with different amines have been synthesized to study their dispersion stabilities in lubricating oil and tribological applications. The intercalated amines should be sufficiently long and lipophilic to provide stabilization to α-ZrP nanosheets in mineral oil. The results of tribological tests illustrate that with the addition of well-dispersed nanosheets, the coefficient of friction (COF) and pin volume loss reduce by ~47% and 75%, respectively. The excellent dispersion stability enables the nanosheets to flow into the contact area at the beginning, and thereby protect the rubbing surface. A reduction in the van der Waals forces between the adjacent layers induced by the intercalated amines transforms the friction between adjacent layers from pin disk to sliding, leading to a decrease in the COF under hydrodynamic lubrication. The study provides a new method to enhance the tribological properties via tuning the dispersion stabilities of nanomaterials in oils.
研究领域:
材料科学
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摩擦学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
·
2019
·Vol. 139
·期 3
·2079-2087
·
IF 2.471
Ou Juhua,Ge Chao,Kong Zhenxing,Chen Yujing,Dai Zilin
A novel organo-modified α-zirconium phosphate was prepared by intercalating a functional 1,2,2,6,6-pentamethyl-4-(phenyldiethoxysiloxy) piperidine into α-ZrP. The structure of functional α-ZrP (IZrP) was characterized by X-ray diffraction, FTIR and SEM. The thermal stability of the silicon rubber (SR) composite obtained by physically mixing IZrP was investigated by TGA and DSC. The results shown that the maximum decomposition temperature ( T max ) of SR/IZrP composites increased from 514 to 540 °C as the IZrP loading increased from 0 to 5 mass% and a reduction in exothermic enthalpy from 3378 to 1520 J g −1 was observed. The maximum exothermic peak temperature had obvious enhancement from 557 to 593 °C, while in SR/IZrP/AlOH the deteriorated thermal stability was observed at T 0.1 when compared with SR/IZrP. The addition of AlOH into SR/IZrP increased the exothermic enthalpy, prolonging the exothermic process and increasing the maximum exothermic peak temperature. The SEM results revealed that IZrP and AlOH were dispersed in SR with the layered structure.
研究领域:
材料科学
·
高分子化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Nano Materials
·
2020
·
IF 0
Zhihao Zhang,Zhongying Ma,Yuhua Wang
At present, most flame retardants, especially halogenated compounds, are banned because of concern for environmental and health issues. In prospect of developing more ecofriendly and effective flame retardants, an alternative solution to develop novel biobased and inorganic flame retardants is addressed. Herein, a nano flame retardant consisting of a lamellar α-zirconium phosphate (α-ZrP) nanosheet modified with chitosan (CH), phytic acid (PA), and a metal ion (Cu2+) with a core–multishell structure is fabricated in water solution via a green and facile self-assembly method and applied to enhance the fire retardant effect of poly(vinyl alcohol) (PVA). Thermogravimetric analysis (TGA) demonstrated that after the addition of α-ZrP@CH@PA@Cu, PVA composites maintained their well-performed ability of char formation. The limit oxygen index (LOI) of pure PVA increased from 18.4 to 29.8% for PVA/α-ZrP@CH@PA@Cu and it reached UL-94 V-1 grade. In the microscale combustion calorimeter test (MCC), the peak heat release rate (pHRR) and the total heat release (THR) of PVA/α-ZrP@CH@PA@Cu sharply decreased by 82.3 and 62.2% compared with pristine PVA. The results implied that α-ZrP@CH@PA@Cu could endow PVA with superior fire retardant properties. Moreover, the research manifested the synergy between α-ZrP and CH@PA@Cu and a double barrier flame retardant mechanism in a condensed phase. In the α-ZrP@CH@PA@Cu flame retardant system, the inorganic α-ZrP nanosheet acted as an insulating core, and the CH@PA@Cu constituted an intumescent shell, where the outer CH@PA@Cu intumescent shell formed an expanded char layer serving as the first barrier to hinder heat and oxygen transfer, and then the inner α-ZrP core layer, as the second barrier, would prevent the further exchange of flammable gases and energy between the polymer and fire during combustion. As a result, this ecofriendly nano flame retardant with the core–multishell structure has a potential application value.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
Journal of Coatings Technology and Research
·
2021
·Vol. 18
·期 4
·999-1012
·
IF 2.382
Situ Yue,Guo Yanlin,Ji Weiwei,Liu Defei,Wei Dan,Huang Hong
Polyaniline (PANI) encapsulated α-zirconium phosphate (α-ZrP) nanocomposites (PANI/α-ZrP) were prepared by in situ oxidative polymerization and used as anticorrosive filler in epoxy coatings. Water absorption test and electrochemical measurements in 3.5 wt.% NaCl solution were conducted to assess the barrier properties and anticorrosion performances of different coating systems. PANI/α-ZrP composite epoxy coating showed remarkably enhanced corrosion resistance comparing to neat epoxy coating because of “maze effect” from α-ZrP and “passivation effect” from PANI. The α-ZrP nanosheets could be completely encapsulated by PANI with appropriate PANI/α-ZrP mass ratio, and the resulting nanocomposite exhibited optimal corrosion protection properties.
研究领域:
材料科学
·
腐蚀与防护
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2022
·
IF 6.633
Chunlei Zhang,Xia Zhu,Chenliang Peng,Chaoyi Guo
The α-zirconium phosphate can act as a potential adsorbent for recycling rare earth ions in tailwater because of the abundant surface -POH groups and the layered structure. The adsorption behaviors and mechanism of rare earth La 3+ on the material were studied through experimental and density functional theory (DFT) calculation methods. The experimental results show that the adsorption process conformed to pseudo-first-order kinetics and Langmuir isotherm model, with the maximum adsorption amount of 37.1 mg⋅g −1 . La 3+ was mainly adsorbed through ion exchange with the proton of surface -POH. The presence of impurity Al 3+ had a great influence on the adsorption of La 3+ on α-ZrP contrary to the case of NH 4 + . DFT calculations further proved that the oxygen of -Zr O P- and -POH acted as adsorption sites of α-ZrP, and the adsorption energies of La 3+ , Al 3+ and NH 4 + were −375.7, −2149.5 and −22.8 kJ⋅mol −1 , respectively, in the order of Al 3+ > La 3+ > NH 4 + , consistent with the experimental results. The partial density of states (PDOS) suggested that the bonding peaks between La 4d and O s 2p orbitals occurred in the energy range of −9 to 0 eV.
研究领域:
化学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
POLYMER
·
2019
·
IF 3.771
Manoj B. Kale,Nidhin Divakaran,Suhail Mubarak,Duraisami Dhamodharan,T. Senthil,Lixin Wu
The in situ polymerization scheme was chose to introduce the amine intercalated α-zirconium phosphate (fZrP) in the waterborne polyurethane (WPU). The α-ZrP (ZrP) was prepared by refluxing zirconyl chloride octahydrate and then amine intercalated using ethylenediamine . The nanocomposites were characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy , X-ray photoelectron spectroscopy and thermogravimetric analysis . The fZrP was introduced in the WPU with the known filler content of 0.1, 0.5 and 1 wt%, respectively. The prepared WPU/fZrP nanocomposites films have shown better mechanical, thermal and water resistance properties compared to the neat WPU and unmodified ZrP nanocomposites. The tensile strength of WPU filled with 1 wt% fZrP was increased by 57.09% against the WPU filled with 1 wt% unmodified ZrP. The thermal properties of the WPU showed increasing performance with the increasing fZrP content. The incorporation of fZrP in the WPU increased the thermal conductivity from 0.1777 W/m . K for virgin WPU and 0.2969 W/m . K for WPU/fZrP (1 wt%). The water resistance performance of the WPU was also improved with the increasing filler content. The results portray that the α-ZrP nanoplates can be an additive material to improve the thermo-mechanical performance of polymers.
研究领域:
材料科学
·
聚合物化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2017
·Vol. 134
·期 19
·
IF 1.86
Lingfeng Xu,Caihong Lei,Ruijie Xu,Xiaoqing Zhang,Feng Zhang
A new kind of flame retardant (ZS) with layered α-zirconium phosphate disks (α-ZrP) as the core and inorganic flame retardant (gel-silica, GS) to shield solid acid sites on the surface of α-ZrP as the shell, was synthesized via a facile method. The incorporation effects of ZS with silicone resin on the thermal properties and flame retardance of PC composites were investigated. The presence of ZS could improve the thermal stability of PC matrix. With the addition of ZS contents increased to 3 wt %, the limiting oxygen index (LOI) of the composite was 32.3% and the vertical burning (UL-94) test reached a V-0 rating. However, with more contents of ZS, the LOI value decreased, and without the GS layer, the LOI value was decreased significantly as well. The synergism between the α-ZrP core and gel-silica shell, also with the silicone resin were found. Based on these results, the flame-retardant mechanism was proposed. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017 , 134 , 44829.
研究领域:
材料科学
·
高分子化学
✓ 已验证
产品关联
DOI
高影响因子
Surfaces and Interfaces
·
2020
·
IF 3.724
Li ML,Huang HW,Mo RB,Sheng XX,Jiang X,Zhang XY
Epoxy resin is widely used in the field of anticorrosive coatings for its outstanding properties. However, environmentally friendly two-component waterborne epoxy coatings often have micropores in its films, making their barrier properties against corrosive media unsatisfactory. α-zirconium phosphate (α-ZrP), known as a kind of flexibly designable two-dimensional nanoparticle , has outstanding mechanical and barrier properties. However, the common problem of incorporating such inorganic fillers into epoxy resins is the poor interface compatibility. In this work, α-ZrP was firstly exfoliated by Tris-(hydroxymethyl)-aminomethane (Tris) aqueous solution, then acidified by diluted hydrochloric acid (HCl) and finally covalently functionalized by 3-aminopropyltriethoxy silane (KH-550). Subsequently, waterborne epoxy composite coatings (KWEPc) with K-ZrP as functional filler were prepared and applied on Q235 carbon steel substrates by blade-coating. With KH-550 modifying, K-ZrP showed an improved dispersion in waterborne epoxy coatings (WEPc). The structure and morphology of prepared K-ZrP was characterized and confirmed by FTIR spectra, XPS and EDS-mapping. The results showed that K-ZrP is evenly modified with amino siloxane. Electrochemical tests revealed that the corrosion rate of KWEPc was one order of magnitude lower than that of WEPc. KH-550 act as a “bridge” among inorganic filler, epoxy resin matrix and Q235 carbon steel substrates.
研究领域:
材料科学
·
表面工程
·
腐蚀与防护
✓ 已验证
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2021
·
IF 4.539
Zhijun Li,Siming Yan,Yi He,Chen Zhang,Hongjie Li,Peng Xie,Ze He,Yi Fan
Graphene oxide (GO), a preeminent two-dimensional (2D) material, has great potential application for corrosion protection owing to its excellent barrier properties to gas and liquid. Unfortunately, the poor dispersion in waterborne epoxy resins and excessive surface defects limit the further application of GO. In this study, a novel GO-based nanofiller PZ-GO (GO modified by polyaniline-wrapped alpha-zirconium phosphate) was designed to endow waterborne epoxy coating (WEC) system with durable anti-corrosion performance. Among them, the modification of alpha-zirconium phosphate (α-ZrP) wrapped with polyaniline (PZ) for GO not only enhanced the dispersion of GO but also strengthened its barrier effect. Notably, as a linker between GO and α-ZrP, PANI could also endow the coating with active inhibition performance. Differential scanning calorimetry (DSC) was introduced to investigate the effect of adding nanofillers on ‘Cure Index’ of composites. The ‘Cure Index’ of epoxy resins doped with PZ-GO was 1.139, which was considered as ‘Excellent’ according to the evaluation criteria, proving that the addition of PZ-GO significantly reinforced the curing degree of epoxy resins. A more complete cure of the epoxy resins could provide a stronger barrier ability for the coatings, thus improving the corrosion resistance of the coatings. Furthermore, the anticorrosive behavior of PZ-GO/WEC was analyzed via electrochemical impedance spectroscopy (EIS) and salt spray tests. The results showed that PZ-GO/WEC exhibited great anticorrosive performance (the impedance value was maintained at 8.72 ×10 7 Ω.cm 2 after immersion in 3.5 wt% NaCl solution for 80 days). In particular, PZ-GO/WEC also demonstrated great active inhibition performance. In addition, the active inhibition mechanism of PZ-GO/WEC was revealed by X-ray photoelectron spectroscopy (XPS) analysis of the corrosion products. All results proved that the excellent corrosion protection properties of PZ-GO/WEC for carbon steels originated from the outstanding barrier ability of PZ-GO/WEC and the active inhibition of PANI.
研究领域:
材料科学
·
腐蚀与防护
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Nano Materials
·
2021
·
IF 5.097
Xiaobo Zhu,Qingqing Yan,Yue Yu,Haichao Zhao,Qunji Xue,Liping Wang
Two-dimensional layered materials have attracted wide attention owing to their many desirable properties. In particular, its outstanding barrier properties can effectively improve the impermeability of organic polymer coatings. However, the barrier properties of the coating depend to a large extent on the dispersion and orientation of the nanosheets in the coating. Here, monoamine-capped poly(etheramine) is inserted into the synthesized α-zirconium phosphate (α-ZrP) to obtain water-dispersible nanosheets with regular shapes and controllable thicknesses. In addition, the effects of the orientation (random and parallel) of α-ZrP nanosheets on the permeability and corrosion resistance of waterborne epoxy coatings have been systematically studied, and the results are in good agreement with the theoretical model. Compared with the pure coating, the impedance of the coating with high aspect ratio nanosheets and the coating with high aspect ratio nanosheets arranged in parallel increased by 83.5 and 221.7 times, respectively, after immersion for 60 days. This provides a strategy and theoretical basis for the two-dimensional nanosheet to improve the long-term service of anticorrosion coatings.
研究领域:
材料科学
·
腐蚀与防护
✓ 已验证
DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2024
·
IF 4.9
Lixia Xie,Liulu Liu,Suyu Xu,Tianyu Wang,Xiaodong Yue,Guangli Li
Norfloxacin (NOR) residues pose a potential threat to our health and ecosystem, so it is highly urgent to develop a simple but accurate method for NOR determination. Therefore, an efficient voltammetric sensing platform was constructed for trace detection of NOR based on nanoplate-like α-zirconium phosphate/carboxylated multiwalled carbon nanotubes (α-ZrP/CMWCNT). The physiochemical characteristics of α-ZrP/CMWCNT were scrutinized using various microscopic, spectroscopic, and electrochemical means. In order to pursuit higher voltammetric responses, detection conditions of NOR such as accumulation potential, accumulation time and buffer pH, were explored comprehensibly. The α-ZrP/CMWCNT enlarged the electrochemically active surface area and lowered the charge transfer resistance. Owing to the synergistic interactions between nanoplate-like α-ZrP NPs and CMWCNTs, the α-ZrP/CMWCNT boosted the voltammetric response signals and reduced the over-potential of NOR. Consequently, the α-ZrP/CMWCNT demonstrated remarkably catalytic activity for NOR electrooxidation, with two broad linear detection ranges (0.01–0.1 μM; 0.1–10.0 μM) and a low detection limit (2.8 nM). The α-ZrP/CMWCNT modified glassy carbon electrode (GCE) exhibited strong anti-interfering ability even in excess of other antibiotics and common metal ions, and maintained robust response peaks up to two weeks. The α-ZrP/CMWCNT/GCE realized accurate determination of NOR from complicated matrices at trace levels with good recoveries (99.00–104.40 %).
研究领域:
分析化学
·
环境科学
·
材料科学
✓ 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）