scholarly journals Preparation, Characterization and Application of Nano-Graphene-Based Energetic Materials

Nanomaterials ◽  
2021 ◽  
Vol 11 (9) ◽  
pp. 2374
Author(s):  
Xiaolong Fu ◽  
Yonghu Zhu ◽  
Jizhen Li ◽  
Liping Jiang ◽  
Xitong Zhao ◽  
...  
Keyword(s):  
Thermal Decomposition ◽  
Future Development ◽  
Energetic Materials ◽  
Energetic Compounds ◽  
Combustion Behavior ◽  
Existing Problems ◽  
Combustion Catalyst ◽  
New Type ◽  
Nano Graphene

Nano-graphene-based energetic materials, as a new type of composite energetic materials such as desensitizer and combustion catalyst, have attracted extensive attention from energetic researchers. In this paper, the preparation of nano-graphene-based energetic materials, the desensitization effect of nano-graphene-based on energetic compounds, the thermal decomposition and combustion behavior of the materials are reviewed. Meanwhile, the existing problems and future development of nano-graphene-based energetic compounds are discussed.

scholarly journals Pandemic and Social Work: Exploring Finnish Social Workers’ Experiences through a SWOT Analysis

2021 ◽  
Author(s):  
Timo Harrikari ◽  
Marjo Romakkaniemi ◽  
Laura Tiitinen ◽  
Sanna Ovaskainen
Keyword(s):  
Content Analysis ◽  
Social Work ◽  
Social Workers ◽  
Swot Analysis ◽  
Adaptive Governance ◽  
Thematic Content Analysis ◽  
Face To Face ◽  
Existing Problems ◽  
Welfare Institutions ◽  
New Type

Abstract This article addresses the experiences of Finnish frontline social workers during the first wave of the COVID-19 pandemic in the spring of 2020. Two questions are addressed. First, ‘what types of challenges social work professionals faced’ in their everyday, ‘glocal’ pandemic setting and, second, what types of solutions they developed to meet these challenges. The data consist of 33 personal diaries that social work professionals created from mid-March to the end of May 2020. The diaries are analysed by a thematic content analysis and placed within the framework of a strengths, weaknesses, opportunities and threats analysis. The results suggest that the pandemic challenged social work at all levels, from face-to-face interactions to its global relations. The pandemic revealed not only the number of existing problems of social work, but also created new types of challenges. It demanded ultimate resilience from social workers and a new type of adaptive governance from social welfare institutions.

scholarly journals Comparative thermal research on tetraazapentalene-derived heat-resistant energetic structures

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Jing Zhou ◽  
Li Ding ◽  
Yong Zhu ◽  
Bozhou Wang ◽  
Xiangzhi Li ◽  
...  
Keyword(s):  
Differential Scanning Calorimetry ◽  
Thermal Decomposition ◽  
Fourier Transform ◽  
Energetic Materials ◽  
Great Influence ◽  
Fourier Transform Infrared ◽  
Thermal Decomposition Mechanism ◽  
Scanning Calorimetry ◽  
In Situ Ftir Spectroscopy ◽  
Heat Resistant

AbstractOrganic inner salt structures are ideal backbones for heat-resistant energetic materials and systematic studies towards the thermal properties of energetic organic inner salt structures are crucial to their applications. Herein, we report a comparative thermal research of two energetic organic inner salts with different tetraazapentalene backbones. Detailed thermal decomposition behaviors and kinetics were investigated through differential scanning calorimetry and thermogravimetric analysis (DSC-TG) methods, showing that the thermal stability of the inner salts is higher than most of the traditional heat-resistant energetic materials. Further studies towards the thermal decomposition mechanism were carried out through condensed-phase thermolysis/Fourier-transform infrared (in-situ FTIR) spectroscopy and the combination of differential scanning calorimetry-thermogravimetry-mass spectrometry-Fourier-transform infrared spectroscopy (DSC-TG-MS-FTIR) techniques. The experiment and calculation results prove that the arrangement of the inner salt backbones has great influence on the thermal decompositions of the corresponding energetic materials. The weak N4-N5 bond in “y-” pattern tetraazapentalene backbone lead to early decomposition process and the “z-” pattern tetraazapentalene backbone exhibits more concentrated decomposition behaviors.

Dynamic Characteristic Analysis of New Pneumatic Bending Joint

2012 ◽  
Vol 271-272 ◽  
pp. 1742-1749
Author(s):  
Peng Cheng Huang ◽  
Qing Hua Yang ◽  
Guan Jun Bao ◽  
Li Bin Zhang
Keyword(s):  
Response Time ◽  
Dynamic Characteristic ◽  
Simulation Analysis ◽  
Characteristic Analysis ◽  
Pneumatic Actuators ◽  
Bending Performance ◽  
First Law Of Thermodynamics ◽  
Existing Problems ◽  
Joint Damping ◽  
New Type

Aimed at existing problems on the bending performance of pneumatic bending joint, a new type of pneumatic bending joint is proposed in this paper. Double flexible pneumatic actuators are used as actuating drivers. Based on the first law of thermodynamics and the joint dynamic equation, the angle dynamic model is established and analyzed. Moreover simplified model is proposed. Meanwhile, its dynamic characteristic is analyzed through simulation analysis. The simulation suggests the following results: in the gas-filled phase, the joint’s pressure response time is about 10ms; while it is about 60ms in the gas-escape phase; and the angle response time of joint is 10 to 20ms. When the joint damping coefficient is increasing, this value will also increase.

Studies on (non) energetic compounds. Part-14: Thermal decomposition of dimethylanilinium chlorides

1999 ◽  
Vol 338 (1-2) ◽  
pp. 45-55 ◽  
Author(s):  
Gurdip Singh ◽  
Inder Pal Singh Kapoor ◽  
Jaspreet Kaur
Keyword(s):  
Thermal Decomposition ◽  
Energetic Compounds

Design for New Type Tobacco Sewing Machine Head

2014 ◽  
Vol 687-691 ◽  
pp. 300-303
Author(s):  
Li Zhang ◽  
Ting You Wang ◽  
Hong Bin Liu
Keyword(s):  
Simple Structure ◽  
Leaf Damage ◽  
Analytic Method ◽  
Sewing Machine ◽  
Tobacco Leaf ◽  
Existing Problems ◽  
Damage Rate ◽  
New Type ◽  
Drawing Method ◽  
New Machine

In order to reducing the worker's labor intensity in tobacco sewing, a new machine adoption with single thread sewing technology was developed. Through analyzing the existing problems in sewing machine and the tobacco damage situation, using drawing method, analytic method and other methods, the shape of the sewing component, hook line components and other mating parts were designed. The results show that the machine has the advantages of simple structure, controllable sewing speed, adjustable leaf thickness and quantity. And the tobacco leaf damage rate is low. The comprehensive efficiency in tobacco leaf knitting with this machine is four times higher than that with hand knitting. Its application prospect is considerable.

Azasydnone – novel “green” building block for designing high energetic compounds

2018 ◽  
Vol 6 (38) ◽  
pp. 18669-18676 ◽  
Author(s):  
Igor L. Dalinger ◽  
Olga V. Serushkina ◽  
Nikita V. Muravyev ◽  
Dmitry B. Meerov ◽  
Evgeniy A. Miroshnichenko ◽  
...  
Keyword(s):  
Building Block ◽  
Energetic Materials ◽  
Green Building ◽  
Future Generations ◽  
Energetic Compounds

The azasydnone unit is a promising explosophoric block for future generations of highly thermostable and dense energetic materials.

Thermal decomposition of energetic materials

1991 ◽  
Vol 181 ◽  
pp. 71-77 ◽  
Author(s):  
J.K. Chen ◽  
T.B. Brill
Keyword(s):  
Thermal Decomposition ◽  
Energetic Materials
Sign in / Sign up

Export Citation Format

Share Document