Synergy between ultrasonication and a polymer matrix in reducing particle size of molecular explosives during crystallization

Lee, Soojin; Lee, Jumi; Kwon, Kuktae; Ko, Eunhee; Lee, Eunji; Yu, Chung-Jong; Shin, Kwanwoo; Kim, Jungwook

doi:10.1039/c8ce01268g

Cited by 2 publications

(2 citation statements)

References 24 publications

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“…The crystals were aggregated in the RDX-CAB-GBL ink due to the presence of the binder whereas the RDX-GBL ink without a binder showed poor printability, with only a small number of crystals being deposited on the substrate because the amount of RDX precursor was less. The addition of the polymeric binder to the formulation increased the printability of the ink because it allowed the explosive crystals to bind together in a matrix [ 21 , 22 , 23 ]. During the printing of RDX patterns, the solvent continuously evaporated from the printed RDX patterns to form crystalized RDX patterns.…”

Section: Resultsmentioning

confidence: 99%

A Simple Route of Printing Explosive Crystalized Micro-Patterns by Using Direct Ink Writing

et al. 2021

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The production of energetic crystalized micro-patterns by using one-step printing has become a recent trend in energetic materials engineering. We report a direct ink writing (DIW) approach in which micro-scale energetic composites composed of 1,3,5-trinitro-1,3,5-triazinane (RDX) crystals in selected ink formulations of a cellulose acetate butyrate (CAB) matrix are produced based on a direct phase transformation from organic, solvent-based, all-liquid ink. Using the formulated RDX ink and the DIW method, we printed crystalized RDX micro-patterns of various sizes and shapes on silicon wafers. The crystalized RDX micro-patterns contained single crystals on pristine Si wafers while the micro-patterns containing dendrite crystals were produced on UV-ozone (UVO)-treated Si wafers. The printing method and the formulated all-liquid ink make up a simple route for designing and printing energetic micro-patterns for micro-electromechanical systems.

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Section: Resultsmentioning

confidence: 99%

A Simple Route of Printing Explosive Crystalized Micro-Patterns by Using Direct Ink Writing

et al. 2021

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“…[12] The recent development in engineering the particulate products employs the assistance of ultrasound as a promising technique which has proven an ability to improve various aspects of the process in terms of reduction in the metastable zone, narrow crystal size distribution, smaller particle size, reduction in induction time, and control over polymorph. [13][14][15][16][17] The use of ultrasound has aided in controlling the stochastic behavior of crystallization into a repeatable and anticipated process by fine-tuning the parameters of the ultrasound.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Thermal Characteristics of Batch Cooling Sonocrystallization: Effect on Crystal Attributes

Yadav

Srivastava

Patel

2022

Cryst. Res. Technol.

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The control of desired product quality attributes in the crystallization process is one of the major concerns of the pharmaceutical industries due to the established standard limits for active pharmaceutical ingredients in applications. The objective of the present work is to establish the fundamental understanding and methodology of the batch cooling sonocrystallization process to tune the crystal attributes over the range of operating parameters, i.e., ultrasound amplitude, duration of sonication, and cooling rate. For the constant cooling rate, the effect of three levels of ultrasound amplitude has been investigated over the range of durations of insonation. It is observed for a fixed cooling rate that the optimized set of ultrasound parameters shortens the induction time resulting in a finer range of particles increasing the surface area and narrowing the particle size distribution. The performance of the process in terms of thermal characteristics has been analyzed to delineate the effect of operating parameters to be employed as a function of the product characteristics. The simple expressions for temperature profiles during the process have been proposed as a function of saturation temperature to facilitate their applications in the optimization of the operating parameters for the desired product size and size range.

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Synergy between ultrasonication and a polymer matrix in reducing particle size of molecular explosives during crystallization

Abstract: A molecular explosive was crystallized inside the polymer matrix by quenching while applying ultrasound.

Cited by 2 publications

References 24 publications

A Simple Route of Printing Explosive Crystalized Micro-Patterns by Using Direct Ink Writing

A Simple Route of Printing Explosive Crystalized Micro-Patterns by Using Direct Ink Writing

Analysis of Thermal Characteristics of Batch Cooling Sonocrystallization: Effect on Crystal Attributes

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