Exploring microstructure and surface features of Chinese coins using non-invasive approaches

Xie, Ruishi; Li, Yuanli; Guo, Baogang; Hu, Hailong; Jiang, Linhai

doi:10.1016/j.apsusc.2015.01.128

Cited by 5 publications

(4 citation statements)

References 33 publications

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“…The crystal structure of microcapsules was determined by PANalytical X' Pert PRO X-ray diffractometer (CuKα target, λ = 1.54187 Å). 47 The molecular composition of microcapsule products is characterized by (Nicolet5700) Fourier infrared spectrometer. Using KBr tablet preparation, scanning 32 times, the test range is 400 to 4000 cm −1 .…”

Section: Characterization Of Microcapsulesmentioning

confidence: 99%

Core@double‐shell structured multifunctional phase change microcapsules based on modified graphene oxide Pickering emulsion

Wei

Yang

et al. 2020

Int J Energy Res

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Summary New multifunctional phase change microcapsules with paraffin (Pn) as core and GO and lead tungstate (PbWO4) as double‐shell were designed by modified GO Pickering emulsion, and the effect of GO content on Pn@GO@PbWO4 microcapsules was studied. The morphology, chemical composition, and structure of Pn@GO@PbWO4 microcapsules were characterized, and their performance was studied in depth. The Pn@GO@PbWO4 microcapsules had a dense shell and a regular spherical structure. Compared with microcapsules without GO addition, the resultant Pn@GO@PbWO4 microcapsules could demonstrate high phase change reliability and thermal stability. Most of all, the anti‐seepage performance had been greatly improved by 67.27%. The results of contact angle (CA) measurement and gamma‐ray shielding test showed that the GO and PbWO4 double‐shell multifunctional microcapsules with superhydrophobic property and good gamma‐ray shielding property and high anti‐seepage performance had great attraction in expanding the application field of phase change materials.

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Section: Characterization Of Microcapsulesmentioning

confidence: 99%

Core@double‐shell structured multifunctional phase change microcapsules based on modified graphene oxide Pickering emulsion

Wei

Yang

et al. 2020

Int J Energy Res

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“…Scanning electron microscopy (SEM) was conducted on an ULTRA 55 (ZEISS, Germany) field emission scanning electron microscope operating at an acceleration voltage of 5 kV. The powder X‐ray diffraction (XRD) patterns were recorded with a PANalytical X'Pert PRO instrument (Cu Kα, λ = 0.15406 nm, 45 kV, 50 mA, Rigaku D/max‐RB, The Netherlands). Images were integrated from 3° to 80° with a 0.05° step size using AreaMax 2 software.…”

Section: Methodsmentioning

confidence: 99%

A Low‐Sensitivity Nanocomposite of CL‐20 and TATB

et al. 2018

Crystal Research and Technology

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In order to improve the safety of 2,4,6,8,10,12-hexanitro-2,4,6,8,10,12hexaazaisowurtzitane (CL-20) while preserving its high energy yield, a nanocomposite containing CL-20 and 1,3,5-triamino-2,4,6-trinitrobenzene (TATB) with a particular structure is prepared using an facile and fast antisolvent crystallization method. Using this approach, which takes advantage of strong antisolvent and temperature effects, a lamellar arrangement structure is created consisting of nanosheets containing CL-20 and TATB, and further coated with dendritic nanometer-scale TATB. XRD and Raman spectra indicate that CL-20 in the resulting nanocomposite takes the form of α polymorph owing to the presence of ultrapure water. The HPLC results show that the TATB content of the nanocomposite is 20.2 wt%. When the surface coating of TATB is removed, 8 wt% TATB remains between the internal nanosheets. Due to the multiple desensitization effects of this structure, the nanocomposite has much lower sensitivity, roughly comparable to that of the insensitive explosive LLM-105. Thermal analysis by thermogravimetry (TG) and differential scanning calorimeter indicates that the thermal decomposition activity of the nanocomposite is higher than those of raw materials, and in addition, its thermal stability is greater.

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“…The X-ray diffraction (XRD) patterns of the MEPCMs were using a PANalytical X’Pert PRO X-ray diffractometer (40 kV, 40 mA) equipped with a copper anode (Cu Kα radiation, λ = 1.54187 Å). The measurements were performed using a 2θ scan ranges from 3 to 80° …”

Section: Experimental Sectionmentioning

confidence: 99%

“…The measurements were performed using a 2θ scan ranges from 3 to 80°. 28 The chemical structures of the paraffin and MEPCMs were analyzed by Fourier transform infrared (FTIR) spectroscopy (Nicolet 5700, USA) with the KBr sampling sheet.…”

Section: ■ Introductionmentioning

confidence: 99%

Modified Phase Change Microcapsules with Calcium Carbonate and Graphene Oxide Shells for Enhanced Energy Storage and Leakage Prevention

Jiang

Yang

et al. 2018

ACS Sustainable Chem. Eng.

129

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Environmentally friendly microencapsulated phase change materials (MEPCMs) with calcium carbonate (CaCO3) shells were modified with graphene oxide (GO), and the effects of GO content and methodology on MEPCMs were examined. The core–shell structure of MEPCMs and crystal structure of CaCO3 shells were confirmed by scanning electron microscopy (SEM), Fourier-transform infrared spectroscopy (FTIR), and X-ray diffractometer (XRD). The thermal properties and stability of MEPCMs were investigated by differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA), suggesting that the addition of GO contributed to improving the heat storage capacity and thermal stability of MEPCMs. When the GO content was 1.0 wt %, the encapsulation ratio of MEPCMs was as high as 73.19%, and the leakage rate was reduced by 89.6% compared to the MEPCMs without GO. Furthermore, the thermal conductivity and mechanical properties of GO modified MEPCMs were improved significantly. The considerable latent heat storage, thermal stability, thermal conductivity, leakageprevention, and mechanical properties of GO modified paraffin@CaCO3 MEPCMs offer potential in green energy applications.

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Exploring microstructure and surface features of Chinese coins using non-invasive approaches

Cited by 5 publications

References 33 publications

Core@double‐shell structured multifunctional phase change microcapsules based on modified graphene oxide Pickering emulsion

Core@double‐shell structured multifunctional phase change microcapsules based on modified graphene oxide Pickering emulsion

A Low‐Sensitivity Nanocomposite of CL‐20 and TATB

Modified Phase Change Microcapsules with Calcium Carbonate and Graphene Oxide Shells for Enhanced Energy Storage and Leakage Prevention

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