Morphological diversity of nitroguanidine crystals with enhanced mechanical performance and thermodynamic stability

Luo, Zhilong; Cui, Yingdan; Dong, Weibing; Xu, Qipeng; Gaoxing, Zou; Kang, Chang-Yong; Hou, Baohong; Chen, Song; Gong, Junbo

doi:10.1016/j.jcrysgro.2017.10.012

Cited by 11 publications

(14 citation statements)

References 26 publications

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“…Pyrimethanil crystals with a stable form are usually platelike products . In this work, in the monosolvents, the morphologies of pyrimethanil crystals are still platelike (Figure a), in spite of the slightly different aspect ratio in different monosolvents (Figure b,c) . Nevertheless, in the binary solvents, the addition of water results in a significantly increased length of crystals, which varies with the amount of water in the binary solvents.…”

Section: Resultsmentioning

confidence: 55%

“…8 In this work, in the monosolvents, the morphologies of pyrimethanil crystals are still platelike (Figure 7a), in spite of the slightly different aspect ratio in different monosolvents (Figure 7b,c). 34 Nevertheless, in the binary solvents, the addition of water results in a significantly increased length of crystals, which varies with the amount of water in the binary solvents. For example, crystals from the methanol/ethanol + water system (x 2 0 = 0.3) are inclined to be rodlike; however, the crystals tend to be platelike in the methanol + water solvent (x 2 0 = 0.9).…”

Section: Journal Of Chemical and Engineering Datamentioning

confidence: 99%

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Measurement and Correlation of the Solubility of Pyrimethanil in Seven Monosolvents and Two Different Binary Mixed Solvents

et al. 2018

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The solubility of pyrimethanil in two binary solvents (water + methanol and water + ethanol) and seven monosolvents (methanol, ethanol, n-propanol, isopropanol, nbutanol, isobutanol, and cyclohexane) was measured by a gravimetric method within the temperature range of 283.15 to 323.15 K at atmospheric pressure. In the investigated temperature range, the solubility of pyrimethanil in all monosolvents or mixed solvents increases with increasing temperature. The solubility in the monosolvents was wellcorrelated using the NRTL model, the Apelblat model, and the Wilson model. Furthermore, the NRTL model and the modified version of the Jouyban−Acree model (the Apel-JA equation) were employed to correlate the solubility in binary solvents. The results showed that these models have a satisfactory correlation. When we measured the solubility, we found that the solvent has a great influence on the crystal habit. Therefore, these results can give guidance for practical industrial processes such as the design of the crystallization process and control of the crystal morphology.

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Section: Resultsmentioning

confidence: 55%

Section: Journal Of Chemical and Engineering Datamentioning

confidence: 99%

Measurement and Correlation of the Solubility of Pyrimethanil in Seven Monosolvents and Two Different Binary Mixed Solvents

et al. 2018

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“…Usually, explosive crystal with spherical shape, narrow size distribution, and good dispersion performance presents high charge density, low mechanical sensitivity, good flowability and mechanical properties for both the powder and its compositions . The use of molecular additives is an effective approach to gain control over crystal morphology . However, the effect of additive in morphology controlling of energetic cocrystals has been rarely studied so far.…”

Section: Resultsmentioning

confidence: 99%

Rapid and High‐Yielding Formation of CL‐20/DNDAP Cocrystals via Self‐Assembly in Slightly Soluble‐Medium with Improved Sensitivity and Thermal Stability

Liu

Duan²,

et al. 2019

Propellants Explo Pyrotec

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In this study, the energetic 2,4,6,8,10,12‐hexanitrohexaazaisowurtzitane/2,4‐dinitro‐2,4‐diazapentane (CL‐20/DNDAP) cocrystals were successfully fabricated via an efficient self‐assembly strategy. The formation processes of CL‐20/DNDAP cocrystal in solvents of H2O, H2O/methyl acetate, and 2‐propanol have been investigated by using the powder X‐ray diffraction (PXRD) qualitative/quantitative analysis and scanning electron microscopy (SEM). Both theoretical and experimental studies confirmed that the most satisfying results can be achieved by using 2‐propanol at 30 °C with crystallization time of 2 h, with a high yield up to 98.2 %. The addition of sodium dodecyl benzene sulfonate (SDBS) is effective in controlling its morphology with a narrow size distribution. Furthermore, the cocrystal exhibits better thermal stability and improved mechanical sensitivity compared with the one prepared by spray drying method. This work provides a simple and convenient approach for the preparation of energetic cocrystals, and the CL‐20/DNDAP cocrystal with high energy and low sensitivity is desirable for various applications.

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“…A study of process parameters on the production of HBD-NGu has been done by Mudryy et al [78]. The effect of various modifiers on the crystallization process and obtained habit of NGu has been investigated by Gong et al [79]. They find that hydroxyethylcellulose [9004-62-0] yields hexagonal shaped platelets which result in superior bulk density when compared with prior art additives.…”

Section: Colloidal Agents As Crystal Habit Modifiersmentioning

confidence: 99%

Insensitive High Explosives: III. Nitroguanidine – Synthesis – Structure – Spectroscopy – Sensitiveness

Koch¹

2019

Propellants Explo Pyrotec

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This paper reviews the production, synthesis, crystallography, particle morphology and spectroscopy of the insensitive high explosive nitroguanidine, (NGu, CH4N4O2), CAS‐No: [556‐88‐7] and its isotopologues [2D4]‐NGu and [15N4]‐NGu]. When compared with standard insensitive high explosives such as 1,3,5‐triamino‐2,4,6‐trinitrobenzene (TATB), 1,1‐diamino‐2,2‐dinitroethylene (FOX‐7) and N‐guanylurea dinitramide (FOX‐12), Nitroguanidine proves to be the least sensitive. The review gives 170 references to the public domain. For Part II see ref. [1].

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Morphological diversity of nitroguanidine crystals with enhanced mechanical performance and thermodynamic stability

Cited by 11 publications

References 26 publications

Measurement and Correlation of the Solubility of Pyrimethanil in Seven Monosolvents and Two Different Binary Mixed Solvents

Measurement and Correlation of the Solubility of Pyrimethanil in Seven Monosolvents and Two Different Binary Mixed Solvents

Rapid and High‐Yielding Formation of CL‐20/DNDAP Cocrystals via Self‐Assembly in Slightly Soluble‐Medium with Improved Sensitivity and Thermal Stability

Insensitive High Explosives: III. Nitroguanidine – Synthesis – Structure – Spectroscopy – Sensitiveness

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