scholarly journals Effect of Bagasse Fiber As the Renewable Environmentally Friendly Material on the Properties of the Waterborne Intumescent Fireproof Coating

2021 ◽  
Author(s):  
Wang Zhan ◽  
Zhongfei Ma ◽  
Zhihao Sun ◽  
Lixia Li ◽  
Zhaozhan Gu ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Fire Protection ◽  
Water Resistance ◽  
Energy Dispersive Spectrometer ◽  
Fire Retardant ◽  
Resistance Test ◽  
X Ray Diffraction ◽  
Char Layer ◽  
Fireproof Coating ◽  
In Fire

Abstract Bagasse was applied as fire-retardant filler to prepare the waterborne intumescent fireproof coating. The effect of bagasse on the properties of the fireproof coating was investigated by fire protection test, thermogravimetric (TG), scanning electron microscope (SEM), energy dispersive spectrometer (EDS), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), water resistance test and mechanical properties test. The result demonstrated the coating contained 1.5wt.% bagasse performed best in fire protection, thermal stability, oxidation resistance. Moreover, the char layer was dense and continuous. However, the fireproof coating contained 2 wt.% bagasse had excellent performance in water resistance test and mechanical properties test due to its properties of fiber. In addition, the components and chemical structure of char layer were characterized to study the flame retardant mechanism of bagasse in the fireproof coating.

scholarly journals Properties and Reaction Mechanisms of Magnesium Phosphate Cement Mixed with Ferroaluminate Cement

Materials ◽  
2019 ◽  
Vol 12 (16) ◽  
pp. 2561 ◽  
Author(s):  
Liang Jia ◽  
Fangli Zhao ◽  
Jian Guo ◽  
Kai Yao
Keyword(s):  
Water Resistance ◽  
Energy Dispersive Spectrometer ◽  
Setting Time ◽  
Cementitious Materials ◽  
Magnesium Phosphate ◽  
Curing Time ◽  
X Ray Diffraction ◽  
Electron Microscopic ◽  
Composite Cement ◽  
Hydrated Product

A certain amount of ferroaluminate cement (FAC) was substituted for MgO during the magnesium phosphate cement (MPC) preparation to obtain the MPC–FAC composite cement. The influence of FAC on the strength, water resistance, pH, and setting time of MPC–FAC composite cement were examined. The microstructure and chemical composition were also analyzed by adopting scanning electron microscopic energy-dispersive spectrometer and X-ray diffraction, respectively. The study showed that setting time of MPC–FAC composite cement was dramatically prolonged when FAC substitution for MgO was between 30 and 40 wt %. The strength of MPC–FAC did not decrease during the early curing time (1 h and 1 d), whereas it increased during the late curing time (3, 7, and 28 days). Moreover, the existence of FAC decreased the hydrated product K-struvite during the early curing time and thus dramatically enhanced the water-resistance of MPC–FAC. With the addition of FAC, a large number of cementitious materials of AFt and AFm, as well as flocculent colloidal substances of AH3, C–S–H, and FH3, were generated during the hydration of MPC, which were filled in the internal pore of the hydrate. Thus, the internal compactness of the sample increased, while the compact protective covering layer was generated on the surface to enhance the water resistance and strength in the late curing time.

MICROSTRUCTURE AND MECHANICAL PROPERTIES OF HYPEREUTECTIC Al-Si/AlNp COMPOSITE

2009 ◽  
Vol 23 (06n07) ◽  
pp. 1377-1382 ◽  
Author(s):  
SEULKI PARK ◽  
JINMYUNG CHOI ◽  
BONGGYU PARK ◽  
IKMIN PARK ◽  
YONGHO PARK ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Energy Dispersive Spectrometer ◽  
Microstructural Characterization ◽  
Weight Fraction ◽  
Reinforcement Particle ◽  
Hot Press ◽  
X Ray Diffraction ◽  
X Ray ◽  
Superior Mechanical Properties ◽  
Phase Evaluation

Hypereutectic Al - Si alloys with fine and evenly distributed Si precipitates have superior mechanical properties In this study, hypereutectic Al - Si alloy powders which contained 15 and 20wt% Si were prepared by a gas atomization process. 1, 3 and 5wt% AlN particles were blended with the Al - Si alloy powders using turbular mixer. The mixture was consolidated by Hot Press at 550°C for 1h under 60MPa. Relative density of the sintered samples was about 98% of theoretical density. This study was investigated by two ways. One is the effect of reinforcement weight fraction and the other is the effect of Silicon contents on the mechanical properties of the composite. Microstructural characterization and phase evaluation were carried out using X-ray Diffraction, Scanning Electron Microscopy equipped with Energy Dispersive Spectrometer. The results showed that the smaller the reinforcement particle size was and the better its distribution was, the higher ultimate tensile strength and hardness were.

Design Study of Steel Structure Fire-Retardant Coatings under High Temperature (Fire) Conditions

2012 ◽  
Vol 594-597 ◽  
pp. 849-859
Author(s):  
Man Li Ou ◽  
Wei Jun Cao ◽  
Long Min Jiang ◽  
Hui Cao
Keyword(s):  
Mechanical Properties ◽  
High Temperature ◽  
Fire Resistance ◽  
Fire Protection ◽  
Structural Damage ◽  
Fire Retardant ◽  
Steel Structure ◽  
Steel Structures ◽  
Strength And Stiffness ◽  
Fire Conditions

As the result of great changes occurring to mechanical properties under high temperature (fire) conditions, steel structures will soon lose the strength and stiffness and lead to structural damage. Through analysis of the steel structure fire resistance design methods under the conditions of high temperature (fire), this article explores the most used fire protection methods in steel structures—brushing or painting fire-resistant coatings, studies the fire-resistance theory of steel structure under fire conditions; in addition, the author proposes the reasonable thickness of the steel structure fire retardant coating of fire-resistant design through design examples.

The Research on Structure Fire Resistance Test of Fire Retardant Rigid Polyurethane

2014 ◽  
Vol 580-583 ◽  
pp. 2646-2648
Author(s):  
Jin Ping Wang
Keyword(s):  
Polyurethane Foam ◽  
Fire Resistance ◽  
Oxygen Index ◽  
Fire Retardant ◽  
Inorganic Materials ◽  
Resistance Test ◽  
Rigid Polyurethane Foam ◽  
Fire Resistance Test ◽  
Index Value ◽  
In Fire

The developed rigid polyurethane foam is added several inorganic materials, which made the polyurethane foam release less poisonous gases in fire. The oxygen index value can reach more than 32 percent, and under the standard heating curve the retardant rigid polyurethane foam can present the performance of 1h fire resistance test.

scholarly journals Fire Propagation Performance of Intumescent Fire Protective Coatings Using Eggshells as a Novel Biofiller

2014 ◽  
Vol 2014 ◽  
pp. 1-9 ◽  
Author(s):  
M. C. Yew ◽  
N. H. Ramli Sulong ◽  
M. K. Yew ◽  
M. A. Amalina ◽  
M. R. Johan
Keyword(s):  
Flame Retardant ◽  
Adhesion Strength ◽  
Water Resistance ◽  
Protective Coatings ◽  
Fire Retardant ◽  
Water Repellency ◽  
Fire Performance ◽  
Fire Propagation ◽  
Index Value ◽  
In Fire

This paper aims to synthesize and characterize an effective intumescent fire protective coating that incorporates eggshell powder as a novel biofiller. The performances of thermal stability, char formation, fire propagation, water resistance, and adhesion strength of coatings have been evaluated. A few intumescent flame-retardant coatings based on these three ecofriendly fire retardant additives ammonium polyphosphate phase II, pentaerythritol and melamine mixed together with flame-retardant fillers, and acrylic binder have been prepared and designed for steel. The fire performance of the coatings has conducted employing BS 476: Part 6-Fire propagation test. The foam structures of the intumescent coatings have been observed using field emission scanning electron microscopy. On exposure, the coated specimens’ B, C, and D had been certified to be Class 0 due to the fact that their fire propagation indexes were less than 12. Incorporation of ecofriendly eggshell, biofiller into formulation D led to excellent performance in fire stopping (index value,(I)=4.3) and antioxidation of intumescent coating. The coating is also found to be quite effective in water repellency, uniform foam structure, and adhesion strength.

Synergistic Effect of Nano Fe2O3 on Intumescent Flame Retardant Polypropylene Systems

2013 ◽  
Vol 669 ◽  
pp. 233-238 ◽  
Author(s):  
Wei Zhao ◽  
Ji Ping Liu
Keyword(s):  
Mechanical Properties ◽  
Fire Retardant ◽  
Thermal Stabilization ◽  
Flame Retardance ◽  
Melamine Phosphate ◽  
Char Layer ◽  
Flame Retarded ◽  
Char Structure ◽  
Intumescent System ◽  
Thermal Stability Of

Nano Fe2O3 were added into polypropylene (PP) / ammonium polyphosphate (APP) / melamine phosphate (MPOP) / 1-oxo-4-hydroxymethyl-2,6,7-trioxal-phosphabicyclo-[2.2.2]octane (PEPA) to prepare intumescent flame-retarded nanocomposites. The flame retardance and thermal stabilization and intumescent char layer have been investigated by UL-94 test, TGA and SEM. Result showed that the behavior of this intumescent system can be enhanced significantly by the addition of small amounts of nano Fe2O3. TGA results present higher thermal stability of the PP-IFR-Fe2O3 in high temperature when compared with the PP-IFR. SEM indicated the char layer from the PP-IFR-Fe2O3 system has a compact and tough char structure compared with the PP-IFR. Adding 0.3 wt% and 27 wt% IFR into PP, the PP-IFR-Fe2O3 system provided good fire retardant behavior, mechanical properties and achieved UL94 V-0 rating.

scholarly journals Microstructural and Mechanical Properties of Binary Ti-Rich Fe–Ti, Al-Rich Fe–Al, and Ti–Al Alloys

Materials ◽  
2019 ◽  
Vol 12 (3) ◽  
pp. 433 ◽  
Author(s):  
Daoud Chanbi ◽  
Leïla Adnane Amara ◽  
Erick Ogam ◽  
Sif Amara ◽  
Zine Fellah
Keyword(s):  
Mechanical Properties ◽  
Energy Dispersive Spectrometer ◽  
Annealing Treatment ◽  
Al Alloys ◽  
Arc Furnace ◽  
X Ray Diffraction ◽  
X Ray ◽  
Rich Alloy ◽  
Scanning Electron

Three series of binary, FeTi (Ti-rich), FeAl and TiAl (Al-rich) alloy samples were produced in an argon arc furnace. An annealing treatment of 72 h at 1000 °C was applied to the samples, giving rise to different equilibrium microstructures depending on chemical composition. Their mechanical properties were studied through the determination of elastic constants that measure the stiffness of the elaborated materials. Young’s modulus of the binary alloys was determined using Resonance Ultrasonic Vibration (RUV). The accuracy of this technique was demonstrated. A scanning electron microscope (SEM) with an energy dispersive spectrometer (EDS) and X-ray diffraction (XRD) made it possible to identify intermetallic compounds FeTi and Fe 2 Ti, FeAl and Fe Al 2 , and TiAl and Ti Al 2 in respective systems Fe–Ti, Fe–Al, and Ti–Al. The link between their composition, microstructure, and elastic properties was established.

scholarly journals Improvement of water resistance and mechanical properties of fast-growing poplar with bio-based isobornyl methacrylate monomer

BioResources ◽  
2020 ◽  
Vol 15 (2) ◽  
pp. 2356-2370
Author(s):  
Ji Xu ◽  
Zhaolan Zhai ◽  
Xingyan Yan ◽  
Zhanqian Song ◽  
Shibing Shang ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Water Resistance ◽  
In Situ Polymerization ◽  
Forest Tree ◽  
Ethanol Solution ◽  
Modulus Of Rupture ◽  
X Ray Diffraction ◽  
Simple Method ◽  
Fast Growing ◽  
Methacrylate Monomer

Fast-growing poplar has become an extensively planted fast-growing forest tree species because of its short plantation rotation, lightweight character, and strong adaptability. However, fast-growing poplar usually exhibits some disadvantageous properties, such as inferior mechanical properties, high hygroscopicity, and poor dimensional stability, which limits its applications to a great extent. Herein, a simple method for improving the water resistance and mechanical properties of fast-growing poplar wood using the biobased monomer isobornyl methacrylate (IBOMA) was investigated. Wood/PIBOMA composites were prepared by impregnating the wood matrix with IBOMA ethanol solution, and then the IBOMA in the wood matrix was heated to initiate in situ polymerization. Field emission scanning electron microscopy (FE-SEM) and X-ray diffraction (XRD) were used to investigate the properties of fast-growing wood/PIBOMA composites. The results showed that the IBOMA successfully penetrated the wood structure and polymerized in the cell walls and cell lumens. Thereby, the water resistance and mechanical properties of the fast-growing poplar were effectively improved. In addition, the water uptake of the wood decreased from 168.3% to 35.8% after impregnation with the 90% IBOMA solution. The modulus of rupture (MOR), modulus of elasticity (MOE), and compression strength (CS) of the 90% wood/PIBOMA composites were increased by 82.7, 28.6, and 2.3%, respectively.

Research on surface properties of Ti-6Al-4V alloy by multi-ultrasonic rolling

2021 ◽  
pp. 095440622098419
Author(s):  
Pengcheng Wang ◽  
Yongzhi Pan ◽  
Yanjie Liu ◽  
Xiuli Fu ◽  
Hongxia Li
Keyword(s):  
Mechanical Properties ◽  
Wear Mechanism ◽  
Energy Dispersive Spectrometer ◽  
Microscopic Analysis ◽  
Rolling Process ◽  
Material Surface ◽  
Three Dimension ◽  
X Ray Diffraction ◽  
Surface Performance ◽  
Oxidation Wear

The main purpose of this paper was to investigate the effect of the multiple ultrasonic surface rolling process (USRP) on the surface mechanical properties and wear mechanism of Ti-6Al-4V. Firstly, X-ray diffraction (XRD) microscopic analysis, work hardening and residual stress were used to measure and characterize the surface performance by USRP. The friction coefficient and wear morphology were obtained by the scanning electron microscope (SEM), three-dimension (3D) white light interferometer and energy dispersive spectrometer (EDS). The results showed that the material surface mechanical properties was effectively improved by the USRP, and the surface grains were refined to form nanoscale. It also can be found that the wear resistance of the material surface was effected by the surface mechanical properties. With the increase of processing, the main wear mechanism changed from delamination-based oxidation wear to adhesive wear with the increase of processing.

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