Thermal and Combustion Characteristics of Binderless Fiberboard

2010 ◽  
Vol 113-116 ◽  
pp. 1063-1070 ◽  
Author(s):  
Chun De Jin ◽  
Jian Li ◽  
Rui Xian Zheng
Keyword(s):  
Heat Release ◽  
Loss Rate ◽  
Decomposition Temperature ◽  
Combustion Characteristics ◽  
Inorganic Acid ◽  
Total Heat Release ◽  
Weight Loss Rate ◽  
Initial Decomposition Temperature ◽  
Flaming Combustion ◽  
Grinding System

Thermagravimetric and combustion characteristics of binderless fiberboard (BF) were investigated. Fibers prepared by traditional heat grinding (FB) and which prepared in the presence of trivial inorganic acid during grinding (FBA) were used as compared. The results show that the total weight lost during thermal decomposition following as: BF > FBA > FB. The order of initial decomposition temperature was that FB > BF > FBA. Thermagravimetric weight loss rate in pyrolysis of woodfiber and binderless fiberboard got from adding minim inorganic acid in the heat grinding system to heat grinding were faster compared to the woodfiber made by heat grinding. Combustion characteristics results revealed that heat release rate and total heat release amount of BF were larger than that of FB. Smoking ratio of BF was larger than that of FB before the flaming combustion, but t less than that of FB after the flaming combustion. The concentration of produced CO2 and CO for BF during combustion was higher than FB.

Organophosphorus-hydrazides as potential reactive flame retardants for epoxy

2019 ◽  
Vol 38 (1) ◽  
pp. 28-52 ◽  
Author(s):  
Alexander B Morgan ◽  
Vladimir Benin ◽  
Donald A Klosterman ◽  
Abdulhamid Bin Sulayman ◽  
Mustafa Mukhtar ◽  
...  
Keyword(s):  
Heat Release ◽  
Flame Retardant ◽  
Flame Retardants ◽  
Aliphatic Amine ◽  
Resin System ◽  
Total Heat Release ◽  
Structural Composites ◽  
Bisphenol F ◽  
Flaming Combustion ◽  
Novel Structures

For structural composites used in vehicles and aircraft, flame retardant chemistries which enhance char formation and reduce heat release are preferred. Phosphorus-based and phosphorus–nitrogen flame retardants for epoxies have been well studied to date, but phosphorus hydrazides have not been studied for their flame-retardant potential in epoxy. These hydrazides offer some novel structures and they can potentially offer a combination of vapor and condensed phase flame retardant action. A series of eight compounds were systematically investigated in this study as reactive flame retardants in a bisphenol F epoxy/aliphatic amine resin system at a level of 2.5 wt% phosphorus. Results suggest that the phosphorus hydrazides react with the epoxy during thermal decomposition, and they also release nitrogen during flaming combustion of the epoxy matrix. The observed reactions resulted in increased char yields and reduced total heat release, while simultaneously lowering heat of combustion and total smoke release.

Experimental Study on Combustion Characteristics of Biomass Charcoal in Air and O2/CO2 Atmosphere

2013 ◽  
Vol 724-725 ◽  
pp. 338-342
Author(s):  
Yong Jia Wang ◽  
Kui Hua Han ◽  
Hui Li ◽  
Jian Li Zhao
Keyword(s):  
Loss Rate ◽  
Combustion Characteristics ◽  
Effect Of Temperature ◽  
Temperature Peak ◽  
Maximum Weight ◽  
Flow Tube ◽  
Weight Loss Rate ◽  
Air Atmosphere ◽  
Better Than ◽  
Maximum Weight Loss

The effect of temperature on the charcoal yield of cornstalk carbonization was investigated in a flow tube furnace. Thermogravimetic analysis was used to study the combustion characteristics of cornstalk and charcoal in air and O2/CO2atmosphere respectively. Characteristics parameters were calculated and analyzed, including ignition temperature, peak temperature, maximum weight loss rate, burnout temperature, average burning rate and burning characteristics index. Results show that the charcoal yield of carbonization decreases with rising temperature. The combustion characteristics of cornstalk in air atmosphere are better than that in O2/CO2atmosphere. However, the combustion characteristics of charcoal are better in O2/CO2atmosphere.

The Non-Combustibility of PTFE Fabric

2011 ◽  
Vol 295-297 ◽  
pp. 349-352 ◽  
Author(s):  
Li Jun Qu ◽  
Xiao Qing Guo ◽  
De Ling Chi ◽  
Ya Ning Sun
Keyword(s):  
Mass Loss ◽  
Heat Release ◽  
Cone Calorimeter ◽  
Loss Rate ◽  
Mass Loss Rate ◽  
Total Heat ◽  
Total Heat Release ◽  
Time To Ignition ◽  
Loss Parameter ◽  
Effective Heat Of Combustion

The non-combustibility of PTFE fabric0s was investigated by Cone Calorimeter in this paper. Ignition parameter, heat release parameter, mass loss parameter and smoke parameter of PTFE fabrics were obtained. The Time to Ignition of PTFE fabric and PTFE/Nomex fabric were 60 and 24s respectively, and the Heat Release Rate were 9.28 and 65.52kw/m2 respectively. The Total Heat Release of PTFE fabric and PTFE/Nomex fabric increased with time, and the Total Heat Release of PTFE/Nomex was much higher than that of PTFE fabric. The Effective Heat of Combustion were 5.06 and 9.94mj/kg respectively, the maximum of mass loss rate of PTFE fabric was larger than that of PTFE/Nomex fabric, and the curve of mass loss rate of PTFE fabric changed rather slightly. It can be concluded that the non-flame properties of PTFE fabric was more remarkable than that of PTFE/Nomex fabric.

Evaluation of Thermal Properties of Fibre Insulation Materials for Inflatable Mini Cold Storage

2013 ◽  
Vol 803 ◽  
pp. 213-217 ◽  
Author(s):  
Yan Wu ◽  
Jiu Chun Han ◽  
Xi Hong Li ◽  
Zhi Li
Keyword(s):  
Thermal Conductivity ◽  
Cold Storage ◽  
Loss Rate ◽  
Radiation Heat Transfer ◽  
Far Infrared ◽  
Decomposition Temperature ◽  
Initial Decomposition Temperature ◽  
Insulation Materials ◽  
Fibrous Insulation ◽  
Heat Preservation

Fibre materials, as thermal insulation materials, will be an optimum choice for inflatable mini cold storage. The evaluation index such as infrared spectrum, thermal stability and thermal conductivity is closely related to the selection and application of fibrous insulation materials. The results showed that the transmittance of bamboo fibre tested by Fourier Transform Infrared Spectroscopy (FTIR) measurements was about 35.3% with an advantage to the heat preservation, and radiation heat transfer was analyzed in the area of far-infrared. The initial decomposition temperature of 1#, 2# and 3# measured by TGA curve was respectively 383.9°C, 372.5°Cand 315.4°C, and the total thermal weight loss rate of 1#, 2# and 3# was 64.59%, 90.16% and 80.47%. The thermal conductivity of 1# at 0°C was 0.035 W·m-1·K-1, lower than 2# and 3#, also lower in the temperature range from 0°C to 8°C, measured by hypothermia thermal instrument.

scholarly journals Co-Combustion Characteristics of Typical Biomass and Coal Blends by Thermogravimetric Analysis

2021 ◽  
Vol 9 ◽  
Author(s):  
Ye Yuan ◽  
Yong He ◽  
Jiaxin Tan ◽  
Yongmeng Wang ◽  
Sunel Kumar ◽  
...  
Keyword(s):  
Thermogravimetric Analysis ◽  
Loss Rate ◽  
Mass Loss Rate ◽  
Reaction Model ◽  
Combustion Characteristics ◽  
Corn Straw ◽  
Weight Loss Rate ◽  
Exponential Factor ◽  
Maximum Mass Loss ◽  
Maximum Weight Loss

In this study, the co-combustion characteristics of coal and biomass blends (20, 40, 60, 80, and 100 wt%) were investigated by thermogravimetric analysis. All the samples were operated under an oxidative atmosphere, with a heating rate of 20 C/min. The reaction stages, ignition and burnout temperature, maximum weight loss rate, and different combustion indices were determined. When the percentage of biomass in the blends was increased, the maximum mass loss rate was enhanced in the second region, and the ignition and burnout temperature was lowered, indicating the higher reactivity and better combustion performance of the samples. The comprehensive performance index presented an N shape with the increasing biomass blending ratio. Based on various combustion indices, 20% was an optimum percentage for the co-utilization of coal-biomass blends. A significant promoting interaction was observed between corn straw and rice straw blends, while inhibiting effects occurred between rice husk and coal. The kinetic parameters of the blends were evaluated by the Coats and Redfern method using the nth-order reaction model. The value of activation energy and the pre-exponential factor increased with the decreasing biomass percentage in the blends.

Synthesis and characterization of flame-retardant-wrapped carbon nanotubes and its flame retardancy in epoxy nanocomposites

2021 ◽  
pp. 096739112110245
Author(s):  
Jiangbo Wang
Keyword(s):  
Carbon Nanotubes ◽  
Heat Release ◽  
Flame Retardant ◽  
Flame Retardancy ◽  
Total Heat Release ◽  
Pristine Cnts ◽  
Peak Heat Release Rate ◽  
Ep Matrix ◽  
Better Than

A novel phosphorus-silicon containing flame-retardant DOPO-V-PA was used to wrap carbon nanotubes (CNTs). The results of FTIR, XPS, TEM and TGA measurements exhibited that DOPO-V-PA has been successfully grafted onto the surfaces of CNTs, and the CNTs-DOPO-V-PA was obtained. The CNTs-DOPO-V-PA was subsequently incorporated into epoxy resin (EP) for improving the flame retardancy and dispersion. Compared with pure EP, the addition of 2 wt% CNTs-DOPO-V-PA into the EP matrix could achieve better flame retardancy of EP nanocomposites, such as a 30.5% reduction in peak heat release rate (PHRR) and 8.1% reduction in total heat release (THR). Furthermore, DMTA results clearly indicated that the dispersion for CNTs-DOPO-V-PA in EP matrix was better than pristine CNTs.

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