Inkjet printing of energetic composites with high density

Xu, Chuanhao; An, Chongwei; Long, Yanling; Li, Qianbing; Guo, Hao; Wang, Shuang

doi:10.1039/c8ra06610h

Cited by 25 publications

(9 citation statements)

References 20 publications

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“…However, there are recent studies that suggest that Z ≫ 10 may permit effective drop generation on significantly different ink forms and printing devices. 22,23 . Next, a drop must overcome the influence between air/fluid interface and associated Laplace pressure for proper ejection that can be defined by We > 4 as proposed by Duineveld 33 .…”

Section: Resultsmentioning

confidence: 99%

“…Important is to realize that these calculated numbers depends on the ink viscosity, density, surface tension and characteristics length or print head orifice size. There is contradictory information in literature on defining the orifice size as nozzle diameter 1,20,23 or radius 21,22,24 . However, a specific printing system would have a constant nozzle size and ink density of aqueous based enzyme ink would be dependent on the amount of viscosity modifier used.…”

Section: Introductionmentioning

confidence: 99%

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Effects of ink characteristics and piezo-electric inkjetting parameters on lysozyme activity

Biswas

Nierstrasz

2019

Sci Rep

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Inkjet printing of enzymes can facilitate many novel applications where a small amount of materials need to be deposited in a precise and flexible manner. However, maintaining the satisfactory activity of inkjet printed enzyme is a challenging task due to the requirements of ink rheology and printhead parameters. Thus to find optimum inkjetting conditions we studied the effects of several ink formulation and jetting parameters on lysozyme activity using a piezoelectric printhead. Within linear activity range of protein concentrations ink containing 50 µg/mL lysozyme showed a satisfactory activity retention of 85%. An acceptable activity of jetted ink was found at pH 6.2 and ionic strength of 0.06 molar. Glycerol was found to be an effective viscosity modifier (10–15 mPa.s), humectant and protein structure stabilizer for the prepared ink. A non-ionic surfactant when used just below critical micelle concentration was found to be favourable for the jetted inks. An increase in activity retention was observed for inks jetted after 24 hours of room temperature incubation. However, no additional activity was seen for inkjetting above the room temperature. Findings of this study would be useful for formulating other protein-based inks and setting their inkjet printing parameters without highly compromising the functionality.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effects of ink characteristics and piezo-electric inkjetting parameters on lysozyme activity

Biswas

Nierstrasz

2019

Sci Rep

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“…An and coworkers [70][71][72] reported inkjet printing using allliquid inks based on PETN, CL-20 and 3,4-dinitrofurazanofuroxan with a theoretical maximum density (TMD) of up to 93 % and detonated printed samples below 1 mm thickness. The latest result is 97 % TMD with ink being the solution of two explosives, 3,4-bis(4-nitro-1,2,5-oxadiazol-3-yl)-1,2,5-oxadiazole-2-oxide (BNFF or DNTF) and RDX, and two binders, GAP and ethyl cellulose [67].…”

Section: Inkjet Printingmentioning

confidence: 99%

Progress in Additive Manufacturing of Energetic Materials: Creating the Reactive Microstructures with High Potential of Applications

Muravyev

Моногаров

Schaller

et al. 2019

Propellants Explo Pyrotec

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The modern “energetic‐on‐a‐chip” trend envisages reducing size and cost while increasing safety and maintaining the performance of energetic articles. However, the fabrication of reactive structures at micro‐ and nanoscales remains a challenge due to the spatial limitations of traditional tools and technologies. These mature techniques, such as melt casting or slurry curing, represent the formative approach to design as distinct from the emerging additive manufacturing (3D printing). The present review discusses various methods of additive manufacturing based on their governing principles, robustness, sample throughput, feasible compositions and available geometries. For chemical composition, nanothermites are among the most promising systems due to their high ignition fidelity and energetic performance. Applications of reactive microstructures are highlighted, including initiators, thrusters, gun propellants, caseless ammunition, joining and biocidal agents. A better understanding of the combustion and detonation phenomena at the micro‐ and nanoscale along with the advancement of deposition technologies will bring further developments in this field, particularly for the design of micro/nanoelectromechanical systems (MEMS/NEMS) and propellant grains with improved performance.

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“…Figure 6 indicates that the value of explosion track is 97.4 mm. According reference [19], the critical size of the detonation is calculated to 0.078 mm. It means that the CL-20 based explosive composite can stably detonate more than 1 × 0.078 mm.…”

Section: Detonation Velocity and Critical Detonation Sizementioning

confidence: 99%

CL‐20 Based Ultraviolet Curing Explosive Composite with High Performance

Guo

Gao

et al. 2019

Propellants Explo Pyrotec

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The integration of the Ultraviolet (UV) curable resin into energetic materials, has been a new direction in the field of explosive inks with high curing speed and high solid loading. In this ink formulation, polyurethane acrylate (PUA), 2,4,6‐trimethylbenzoyl‐diphenylphosphine oxide (TPO) and hexanitrohexaazaisowurtzitane (CL‐20) were selected as binder, photoinitiator and main explosive, respectively. The CL‐20 based UV‐curing explosive composite was prepared by UV‐curing and direct ink writing (DIW) technology. The rate of curing, micro‐scale structure, morphology, crystal type, impact sensitivity, and detonation ability of the sample were characterized and analyzed. The results show that the curing process of CL‐20 based UV‐curing explosive ink could be completed within 7 minutes after UV‐curing for 3 minutes, revealing rapid curing speed. In the preparation process of CL‐20 based explosive composite, the crystal type of CL‐20 do not change. Compared with raw CL‐20, the explosive composite has a lower impact sensitivity. Moreover, the critical detonation size is around 1×0.078 mm, and the detonation velocity is 7357 m s−1.

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Inkjet printing of energetic composites with high density

Abstract: To explore a new manufacturing method in preparing energetic composites, an inkjet printing device possessing the ability of high precision and flexibility was utilized to deposit six 3,4-dinitrofurazanofuroxan and hexogen based explosive inks.

Cited by 25 publications

References 20 publications

Effects of ink characteristics and piezo-electric inkjetting parameters on lysozyme activity

Effects of ink characteristics and piezo-electric inkjetting parameters on lysozyme activity

Progress in Additive Manufacturing of Energetic Materials: Creating the Reactive Microstructures with High Potential of Applications

CL‐20 Based Ultraviolet Curing Explosive Composite with High Performance

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