scholarly journals The effect of surface area and density on the volumetric shock initiation of PETN

2020 ◽  
Author(s):  
Rosemary Burritt ◽  
Michael Bowden
Keyword(s):  
Surface Area ◽  
Shock Initiation ◽  
Effect Of Surface

scholarly journals Evaluating the Ability of Bone Char/nTiO2 Composite and UV Radiation for Simultaneous Oxidation and Adsorption of Arsenite

2022 ◽  
Vol 3 (1) ◽  
pp. 19-34
Author(s):  
Susan Alkurdi ◽  
Raed Al-Juboori ◽  
Jochen Bundschuh ◽  
Alla Marchuk
Keyword(s):  
Surface Area ◽  
Circular Economy ◽  
Pore Volume ◽  
Environmental Remediation ◽  
Titanium Dioxide Nanoparticles ◽  
Bone Char ◽  
Simultaneous Oxidation ◽  
Important Approach ◽  
High Level ◽  
Effect Of Surface

The reuse of waste materials for water treatment purposes is an important approach for promoting the circular economy and achieving effective environmental remediation. This study examined the use of bone char/titanium dioxide nanoparticles (BC/nTiO2) composite and UV for As(III) and As(V) removal from water. The composite was produced via two ways: addition of nTiO2 to bone char during and after pyrolysis. In comparison to the uncoated bone char pyrolyzed at 900 °C (BC900), nTiO2 deposition onto bone char led to a decrease in the specific surface area and pore volume from 69 to 38 m2/g and 0.23 to 0.16 cm3/g, respectively. However, the pore size slightly increased from 14 to 17 nm upon the addition of nTiO2. The composite prepared during pyrolysis (BC/nTiO2)P had better As removal than that prepared after pyrolysis with the aid of ultrasound (BC/nTiO2)US (57.3% vs. 24.8%). The composite (BC/nTiO2)P had higher arsenate oxidation than (BC/nTiO2)US by about 3.5 times. Arsenite oxidation and consequent adsorption with UV power of 4, 8 and 12 W was examined and benchmarked against the composite with visible light and BC alone. The highest UV power was found to be the most effective treatment with adsorption capacity of 281 µg/g followed by BC alone (196 µg/g). This suggests that the effect of surface area and pore volume loss due to nTiO2 deposition can only be compensated by applying a high level of UV power.

scholarly journals Effect of surface area and air-drying distance on shear bond strength of etch-and-rinse adhesive

2012 ◽  
Vol 26 (5) ◽  
pp. 418-423 ◽  
Author(s):  
Farid Mohammed Sabry El-Askary ◽  
Mohammed Salah Abdelaziz Nassif ◽  
Andrea Mello Andrade ◽  
Alessandra Reis ◽  
Alessandro Dourado Loguercio
Keyword(s):  
Bond Strength ◽  
Surface Area ◽  
Shear Bond Strength ◽  
Air Drying ◽  
Etch And Rinse ◽  
Effect Of Surface

Effect of surface area of grain boundaries on stress relaxation behavior in pure copper over wide range of grain sizes

2020 ◽  
Vol 794 ◽  
pp. 139585
Author(s):  
Yurina Suzuki ◽  
Kota Ueno ◽  
Kodai Murasawa ◽  
Yoshinori Kusuda ◽  
Masato Takamura ◽  
...  
Keyword(s):  
Stress Relaxation ◽  
Grain Boundaries ◽  
Surface Area ◽  
Pure Copper ◽  
Relaxation Behavior ◽  
Stress Relaxation Behavior ◽  
Grain Sizes ◽  
Wide Range ◽  
Effect Of Surface

Patterning PETN and HMX using Dip Pen Nanolithography

2005 ◽  
Vol 896 ◽  
Author(s):  
Omkar Nafday ◽  
Brandon Weeks ◽  
Jason Haaheim ◽  
Ray Eby
Keyword(s):  
Surface Energy ◽  
Scanning Probe Microscopy ◽  
Convenient Method ◽  
Energetic Materials ◽  
Scanning Probe ◽  
Pentaerythritol Tetranitrate ◽  
High Explosives ◽  
Shock Initiation ◽  
Effect Of Surface ◽  
Dip Pen Nanolithography

AbstractRecently there has been a focused effort to develop reliable nanoscopic writing and reading capabilities. Dip-pen nanolithography (DPN) has emerged as a convenient method to deliver nanoscale materials onto a substrate by leveraging scanning probe microscopy capability. A new application for the DPN method is the field of microdetonics which is the microscale decomposition and study of reactions of explosives. Results are presented for patterning pentaerythritol tetranitrate (PETN) and cyclotetramethylene tetranitramine (HMX) on silicon and mica substrates. The ultimate goal is to pattern both energetic materials in nanoscale registry and investigate their reaction and decomposition at the nanoscale due to heating or shock initiation. In addition to patterning of high explosives, a discussion on the effect of surface energy on patterning rates is investigated. This knowledge will be applicable to inks beyond high explosives.

Sign in / Sign up

Export Citation Format

Share Document