Study on Influencing Factors of Asphalt Fume Releasing and its Hazards

2012 ◽  
Vol 209-211 ◽  
pp. 1257-1260 ◽  
Author(s):  
Xin Wen Wang ◽  
Wei Jun Zhang
Keyword(s):  
Aromatic Compounds ◽  
Heterocyclic Compounds ◽  
Heating Temperature ◽  
Road Construction ◽  
Heating Time ◽  
Construction Workers ◽  
Asphalt Road ◽  
Other Substances ◽  
Main Factors ◽  
Temperature Heating

A large number of experiments were done in order to find out the main factors which have an influence on the asphalt flue production in asphalt road construction and to master its dangers. The results show that the asphalt flue production varies with heating temperature, heating time, the asphalt thickness and stirring rate significantly. accordingly these are the main factors which influence the asphalt flue production. Further analysis by means of UV spectrophotometer and liquid chromatography shows that the asphalt flue contains serious harm to human body, such as aromatic compounds, alkanes, and sulfur heterocyclic compounds and other substances. therefore some steps should be taken to inhibit the production of asphalt flue for reducing the hazards to construction workers.

Numerical Simulation and Process Optimization of Automotive Friction Materials in Warm Pressing Forming

2013 ◽  
Vol 788 ◽  
pp. 57-60
Author(s):  
Chun Cao ◽  
Chun Dong Zhu ◽  
Chen Fu
Keyword(s):  
Process Optimization ◽  
Heating Temperature ◽  
Maximum Energy ◽  
Heating Time ◽  
Product Performance ◽  
Forming Process ◽  
Friction Materials ◽  
Forming Technology ◽  
The Relationship ◽  
Temperature Heating

Warm pressing forming technology has been gradually applied to the forming of automotive friction materials. How to ensure product performance to achieve the target at the same time achieve the maximum energy saving is the research focus of this study. In this paper, by using finite element method, the field of automotive friction materials in warm pressing forming was analyzed, reveals the relationship between the temperature field and the heating temperature/heating time. Furthermore, the energy consumption was analyzed and compared it with hot pressing forming process. The results will have significant guiding to the process optimization in warm pressing forming.

scholarly journals Study on the Thermal Treatment of Nano-Ag/TiO2 Thin Film

2011 ◽  
Vol 2011 ◽  
pp. 1-5
Author(s):  
Peng Bing ◽  
Wang Jia ◽  
Chai Li-yuan ◽  
Wang Yun-yan ◽  
Mao Ai-li
Keyword(s):  
Thin Film ◽  
Methyl Orange ◽  
Thermal Treatment ◽  
Photocatalytic Degradation ◽  
Tio2 Thin Film ◽  
Heating Temperature ◽  
Antibacterial Properties ◽  
Heating Time ◽  
Degradation Rates ◽  
Temperature Heating

The photocatalytic degradation rates of methyl orange and antibacterial properties of nano-Ag/TiO2 thin film on ceramics were investigated in this study. XRD was used to detect the structure of film to clarify the impacts on the rates and properties. The effect of film layers, heating temperature, heating time, and embedding of Ag+ on the degradation rates and antibacterial properties were ascertained. The nano-Ag/TiO2 film of 3 layers with AgNO3 3% embedded and treated at 350°C for 2 h would exhibit good performance.

A Study of the Factors Affecting the Separation Force of Artificial Leather Laminating Process

2017 ◽  
Vol 728 ◽  
pp. 307-312
Author(s):  
Kusol Pimapunsri ◽  
Teeradej Wuttipornpun ◽  
Darawan Veeranant
Keyword(s):  
Transverse Direction ◽  
Heating Temperature ◽  
Machine Direction ◽  
Factors Affecting ◽  
Artificial Leather ◽  
Optimal Setting ◽  
Main Factors ◽  
Potential Factors ◽  
Separation Force ◽  
Temperature Heating

The separation force is one of the most important properties of artificial leather industries. This paper aims to determine an optimal setting of artificial leather laminating process in order to obtain the desired separation force. There are three potential factors directly influence the separation force for both machine direction (MD) and transverse direction (TD). These factors are take-off temperature, heating temperature, and embossing pressure. To study the effect of these factors on the separation force, a 23 factorial design with six replicates is then conducted, and the result is analyzed at a significant level of 0.05. The result shows that all main factors have significant effects to MD and TD. The optimal setting of the laminating process for artificial leather to obtain the desired MD and TD is that using take-off temperature, heating temperature and embossing pressure at 175°C, 150°C and 40 Bar respectively.

Studies on changes in the temperature field and recrystallization properties of glass fiber reinforced polypropylene composite strip winding process

2020 ◽  
pp. 095440622097059
Author(s):  
Jiazhong Xu ◽  
Tianyu Fu ◽  
Zhao Hui
Keyword(s):  
Mechanical Properties ◽  
Glass Fiber ◽  
Heating Temperature ◽  
Heating Time ◽  
Temperature Fields ◽  
Fiber Reinforced ◽  
Composite Ring ◽  
Glass Fiber Reinforced ◽  
The Press ◽  
Temperature Heating

The glass fiber reinforced polypropylene (GF/PP) composite ring specimens were fabricated based on the composites prepreg tape winding process. The heated winding process was simulated by ANSYS software to obtain the temperature distribution of the wound layer of the specimen. At the same time, the temperature of the wound layer was collected and stored using a temperature-controlled recorder. The temperature fields between the wound layers were found to be different significantly, and the temperature measured through experiments was generally below the simulation results, where it is especially noticeable in the fusion zone. After the recrystallization of GF/PP specimen, the maximum shear strength that the specimen can withstand was improved. The response surface method was used to test and analyze the influence of recrystallization on the mechanical properties of the specimen, Obtain optimized process parameters, heating temperature of 91 °C, pressure of the press roller is 106 N, heating time of 13 min, the highest sample obtained is 28.67Mpa. The experimental results show that the influence of recrystallization parameters on the mechanical properties of the composite specimens (from large to small) are: heating temperature, heating time, and the roller pressure.

Bioadhesive from Distiller's Dried Grains with Solubles

2009 ◽  
Vol 87-88 ◽  
pp. 357-361
Author(s):  
C.Q. Fang ◽  
R. Auras ◽  
S.E. Selke
Keyword(s):  
Heating Temperature ◽  
Heating Time ◽  
Preparation Process ◽  
Experimental Conditions ◽  
Naoh Solution ◽  
And Performance ◽  
Temperature Heating ◽  
Feedstock Material

Distiller's Dried Grains with Solubles (DDGS) is used to replace starch as a major feedstock material to produce bio-adhesive. The experimental conditions and the preparation process of the DDGS bioadhesive are outlined. The production and performance of DDGS adhesives were directly influenced by the heating temperature, heating time and concentration of hydroxide (NaOH) solution. When the heating temperature was 90 °C, the heating time was 10 min, and the concentration of NaOH solution was 30g/L, the yield of the DDGS adhesive was 61.6% wt/dry wt. The DDGS adhesive was less sensitivity to humidity than commercial starch adhesive.

scholarly journals A Study of the Key Factors on Production of Graphene Materials from Fe-Lignin Nanocomposites through a Molecular Cracking and Welding (MCW) Method

Molecules ◽  
2021 ◽  
Vol 27 (1) ◽  
pp. 154
Author(s):  
Qiangu Yan ◽  
Timothy Ketelboeter ◽  
Zhiyong Cai
Keyword(s):  
Heating Temperature ◽  
Low Cost ◽  
Heating Time ◽  
Critical Parameters ◽  
Metal Catalyst ◽  
Key Factors ◽  
Metal Structures ◽  
Layer Graphene ◽  
Few Layer Graphene ◽  
Temperature Heating

In this work, few-layer graphene materials were produced from Fe-lignin nanocomposites through a molecular cracking and welding (MCW) method. MCW process is a low-cost, scalable technique to fabricate few-layer graphene materials. It involves preparing metal (M)-lignin nanocomposites from kraft lignin and a transition metal catalyst, pretreating the M-lignin composites, and forming of the graphene-encapsulated metal structures by catalytic graphitization the M-lignin composites. Then, these graphene-encapsulated metal structures are opened by the molecule cracking reagents. The graphene shells are peeled off the metal core and simultaneously welded and reconstructed to graphene materials under a selected welding reagent. The critical parameters, including heating temperature, heating time, and particle sizes of the Fe-lignin composites, have been explored to understand the graphene formation mechanism and to obtain the optimized process parameters to improve the yield and selectivity of graphene materials.

Oil point pressure of Indian almond kernels

2012 ◽  
Vol 26 (3) ◽  
pp. 225-228 ◽  
Author(s):  
O. Aregbesola ◽  
G. Olatunde ◽  
S. Esuola ◽  
O. Owolarafe
Keyword(s):  
Particle Size ◽  
Moisture Content ◽  
Fine Particles ◽  
Heating Temperature ◽  
Heating Time ◽  
Coarse Particles ◽  
Point Pressure ◽  
Temperature Heating

Oil point pressure of Indian almond kernels The effect of preprocessing conditions such as moisture content, heating temperature, heating time and particle size on oil point pressure of Indian almond kernel was investigated. Results showed that oil point pressure was significantly (P < 0.05) affected by above mentioned parameters. It was also observed that oil point pressure reduced with increase in heating temperature and heating time for both coarse and fine particles. Furthermore, an increase in moisture content resulted in increased oil point pressure for coarse particles while there was a reduction in oil point pressure with increase in moisture content for fine particles.

Preparation of Floating TiO2/EP by Hydrothermal Method

2013 ◽  
Vol 800 ◽  
pp. 13-17
Author(s):  
Jin Lei Bao ◽  
Xiao Yuan Fan ◽  
Wei Ping Jin ◽  
Bi Bo Liu
Keyword(s):  
Particle Size ◽  
Rhodamine B ◽  
Uv Light ◽  
Heating Temperature ◽  
Heating Time ◽  
Photocatalytic Reaction ◽  
Optimal Conditions ◽  
Expanded Perlite ◽  
Light Utilization ◽  
Temperature Heating

Most of photocatalytic reaction taken place in a slurry type reactor, which is of poor light utilization and difficulty to recycling of photocatalyst. To overcome these drawbacks, a floating photocatalyst (TiO2/EP) was prepred by hrothermal method, in which EP(Expanded Perlite) was used as an substrate. Photocatalysts activity was evaluated under UV light using Rhodamine B as the pollutant model. The effect of heating temperature, heating time and dosage of EP on activity of TiO2/EP were Discussed. The results showed 2h and 200°C were the optimal conditions and the dosage of EP has no significant effect on activity of TiO2/EP. The results of XRD and SEM showed TiO2 is anatase form, well crystallized and dispersed; its particle size is about 100~150nm. This floating photocatalyst can remove about 97.4% rhodamine B(10mg/L) during 90min under UV light. It has broad prospects for engineering applications.

scholarly journals Study on Ultra-High Temperature Contact Solution Treatment of Al–Zn–Mg–Cu Alloys

Metals ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 842
Author(s):  
Wenming Jin ◽  
Jianhao Yu ◽  
Zhiqiang Zhang ◽  
Hongjie Jia ◽  
Mingwen Ren
Keyword(s):  
Heating Temperature ◽  
Solution Treatment ◽  
Strengthening Mechanism ◽  
Heating Time ◽  
Solution Time ◽  
Solution Temperature ◽  
Second Phase ◽  
Total Strength ◽  
Cu Alloys ◽  
Short Heating Time

Contact solution treatment (CST) of Al–Zn–Mg–Cu alloys can shorten solution time to within 40 s in comparison with 1800 s with traditional solution treatment using a heating furnace. Heating temperature is the key factor in solution treatment. Considering the short heating time of CST, the ultra-high solution temperature over 500 °C of Al–Zn–Mg–Cu alloys was studied in this work. The effects of solution temperatures on the microstructures and the mechanical properties were investigated. The evolution of the second phases was explored and the strengthening mechanisms were also quantitatively evaluated. The results showed that solution time could be reduced to 10 s with the solution temperature of 535 °C due to the increasing dissolution rate of the second phase and the tensile strength of the aged specimen could reach 545 MPa. Precipitation strengthening was the main strengthening mechanism, accounting for 75.4% of the total strength. Over-burning of grain boundaries occurred when the solution temperature increased to 555 °C, leading to the deterioration of the strength.

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