Investigation on the interface modification of PET/PP composites

2019 ◽  
Vol 33 (14n15) ◽  
pp. 1940019 ◽  
Author(s):  
Chang-Mou Wu ◽  
Ri-Ichi Murakami ◽  
Syuan-Guang Lai ◽  
Po-Chun Lin ◽  
Pankaj Koinkar ◽  
...  
Keyword(s):  
Surface Modifications ◽  
Pullout Test ◽  
Manufacturing Processes ◽  
Carbon Fabric ◽  
Interface Modification ◽  
Pet Fabric ◽  
Key Technologies ◽  
Open Hole ◽  
Pet Fibers ◽  
Pp Composites

In this study, surface modifications and manufacturing processes for polyethylene terephthalate (PET)/polypropylene (PP) composites were developed. When non-polar PP resin is combined with polar polyester fiber, its compatibility and wettability are the key technologies. Maleic anhydride-grafted PP (MAPP) was blended with PP to improve the polarity of the PP resin and react with PET fibers. In addition, a primer was applied to the PET fabric to improve the bonding and reactivity of PET fiber and MAPP. PET/PP composites that imitated the texture and appearance of carbon fabric were prepared by thin film stacking method. The effect of MAPP and primer on interfacial bonding was evaluated by single-fiber pullout test. The mechanical properties of the PET/PP composites such as impact, and open-hole tensile strength (OHT), were studied.

Enhancing the mechanical and water resistance performances of bamboo particle reinforced polypropylene composite through cell separation

Holzforschung ◽  
2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Dan Ren ◽  
Xuexia Zhang ◽  
Zixuan Yu ◽  
Hankun Wang ◽  
Yan Yu
Keyword(s):  
Water Absorption ◽  
Cell Separation ◽  
Water Resistance ◽  
Dynamic Mechanical Properties ◽  
Simple Method ◽  
Interface Modification ◽  
Wood Particles ◽  
Bamboo Fibers ◽  
Pp Composites ◽  
Mechanical Performances

AbstractIt is frequently observed that bamboo particle composites (BPCs) do not show higher mechanical performances than the corresponding wood particles composites (WPCs), although bulk bamboo is much stronger than wood in mechanical performances. Herein this phenomenon was demonstrated from the cell compositions in the applied bamboo particles. To address that, a simple method to physically separate bamboo fibers (BFs) and bamboo parenchyma cells (BPs) from a bamboo particle mixture was developed. Polypropylene (PP) composites with pure BFs, BPs, a mixture of BFs and BPs (BFs + BPs), wood particles (WPs) as fillers were prepared. The flexural and dynamic mechanical properties, water absorption, and thermal properties were determined. The BF/PP composites showed the best mechanical performances (MOR at 35 MPa, MOE at 2.4 GPa), followed by WP/PP, (BF + BP)/PP, and BP/PP. They also exhibited the lowest water absorption and thickness swelling. Little difference was found for the thermal decomposition properties. However, a lower activation energy of BF/PP compared with BP/PP implied an uneven dispersion of BFs and weaker interfacial interaction between BF and PP. The results suggest that the mechanical performances and water resistance of bamboo particle/polymer composites can be significantly improved through cell separation. However, interface modification should be applied if higher performances of BF/PP composites are required.

scholarly journals Studies on the Process of Ultrasonic Bonding of Nonwovens: Part 2: Experiments and Results

2001 ◽  
Vol os-10 (3) ◽  
pp. 1558925001OS-01
Author(s):  
Zhentao Mao ◽  
Bhuvenesh C. Goswami
Keyword(s):  
Experimental Studies ◽  
Bonding Process ◽  
Heat Generation Rate ◽  
Temperature Changes ◽  
Pet Fabric ◽  
Pressure Groups ◽  
Group Settings ◽  
Ultrasonic Bonding ◽  
Speed Group ◽  
Pet Fibers

Bicomponent PET fibers and a spunbonded PET fabric were used for the experimental studies of the ultrasonic bonding process. There were five different bonding process settings and they were grouped as the speed and pressure groups. From calculations the highest heat generation rate was found to be in the middle of the bonding positions. The rate of temperature rise was also found to be the highest in the middle of the bonding positions. The calculated temperature results were found to be close to the experimental measurements. For the speed group settings the slower speed resulted in fabrics that were stiffer, and stronger, and the degree of bonding was also higher. The middle speed setting produced the fabrics with the highest elongation. For the pressure group settings the higher pressure resulted in making fabrics stiffer, and stronger, and the degree of bonding was also higher. But for elongation the middle speed setting resulted in the highest value. The SEM micrographs of the cross-section of fabrics made with different settings showed that the degrees of bonding of fabrics were correlated with temperature changes and the processing conditions.

Improvement and evenness of the side illuminating effect of side emitting optical fibers by fluorescent polyester fabric

2018 ◽  
Vol 89 (10) ◽  
pp. 2010-2018 ◽  
Author(s):  
Juan Huang ◽  
Dana Křemenáková ◽  
Jiří Militký ◽  
Vít Lédl
Keyword(s):  
Optical Fibers ◽  
Fiber Length ◽  
Surface Modifications ◽  
Polyester Fabric ◽  
Illumination Intensity ◽  
Testing Methods ◽  
Pet Fabric ◽  
Plastic Optical Fibers ◽  
Side Illumination

A strong and even side illuminating effect is required for plastic optical fibers (POFs) in illuminating applications. In consideration of good flexibility and illumination, side emitting POFs with 2 and 3 mm core diameters are preferred, especially in active illuminating safety textiles. However, the side illumination intensity of side emitting POF varies significantly along the fiber length. Fluorescent polyester (PET) fabric rather than traditional surface modifications is employed to enhance and even the side illuminating effect of POFs based on the emitting principle of phosphors. Two testing methods of side illumination intensity are carried out on semi-automatic devices. The results indicate that 2 mm side emitting POFs might take the place of 3 mm side emitting POFs by using fluorescent PET fabric, with a similar side illuminating effect in applications under certain circumstances.

Study on Special Shaped Polyester Fibers and Development of Products

2021 ◽  
Vol 8 (3) ◽  
pp. 17-22
Author(s):  
Yeqian Ge ◽  
Qin Deyan ◽  
Wang Hongfang ◽  
Tu Jianhong ◽  
Wang Xuefei ◽  
...  
Keyword(s):  
Cross Section ◽  
Natural Fibers ◽  
Great Influence ◽  
Circular Cross Section ◽  
Synthetic Fibers ◽  
Pet Fabric ◽  
Knit Fabrics ◽  
Section Shape ◽  
Pet Fibers ◽  
Profiled Fibers

Non-circular profiled fibers are generally synthetic fibers that have a modified cross-section shape, which are created to mimic natural fibers or to obtain special properties. The shape of the cross-section has great influence on the properties of profiled polyester (PET) fibers and their fabrics. The structure and properties of flat-shaped and hexagonal-shaped profiled PET fibers and ordinary PET fibers, as well as the properties of their knit fabrics were characterized. Experimental results showed that air permeability, heat retention, and wrinkle resilience of profiled PET fabrics were better than that of circular a cross-section PET fiber fabric, while the circular cross-section PET fabric was softer than the profiled PET fiber fabrics.

Morphology and Properties of PET Fabric Finished by β-Cyclodextrin and Citric Acid

2011 ◽  
Vol 331 ◽  
pp. 412-415 ◽  
Author(s):  
Yun Li Wang ◽  
Wei Lin Xu ◽  
Ying Wang ◽  
Yuan Ming Wu ◽  
Shan Cheng
Keyword(s):  
Water Vapor ◽  
Citric Acid ◽  
Crosslinking Agent ◽  
Vapor Transport ◽  
Water Vapor Transport ◽  
Textile Fiber ◽  
Pet Fabric ◽  
Hydrophilic Property ◽  
Pet Fibers ◽  
Moisture Liberation

Polyethylene terephthalate (PET) fiber is a kind of widely used textile fiber due to its some desirable properties. However, it limited its application in clothing because of poor hydrophilic property and high static electric. In order to improve hydrophilic and antistatic properties of PET fabrics, β-cyclodextrin (β-CD) was finished onto them with citric acid (CA) as crosslinking agent. SEM showed that β-CD was finished successfully onto PET fibers. Moisture liberation curve indicated that the finished PET fabrics possessed favorable hydrophilic property. However, water vapor transport property of the finished PET fabrics slightly decreased. Antistatic property of PET fabrics finished by β-CD acquired improvement. In addition, tensile properties of PET fabric also were enhanced after finishing.

A novel method to bind soybean protein onto the surface of poly(ethylene terephthalate) fabric

2016 ◽  
Vol 87 (4) ◽  
pp. 460-473
Author(s):  
Jianfeng Zhou ◽  
Dandan Zheng ◽  
Fengxiu Zhang ◽  
Guangxian Zhang
Keyword(s):  
Photoelectron Spectroscopy ◽  
Ethylene Terephthalate ◽  
Soybean Protein ◽  
X Ray Diffraction ◽  
X Ray ◽  
Pet Fabric ◽  
Poly Ethylene Terephthalate ◽  
Pet Fibers ◽  
Diffraction Patterns ◽  
Poly Ethylene

In this study, –NH2 groups were introduced to a poly(ethylene terephthalate) (PET) fabric to make the fabric hydrophilic and, then, soybean protein was bonded on the surface of the modified PET fabric to obtain a soybean protein/PET composite fabric. The –NH2 groups allowed the soybean protein to be firmly bonded on the surface of the modified PET fabric. Scanning electron microscopy images showed that the surface of each modified PET fiber had a small number of grooves and that there was a thin film on each soybean protein/PET fiber. Attenuated total reflectance Fourier transform infrared spectra demonstrated that the nitrated and reduced PET fibers were introduced –NH2 groups and that there were –CO–NH– groups on the surface of soybean protein/PET fibers. X-ray photoelectron spectroscopy analyses showed that there was a nitrogen element on the modified PET fibers. The X-ray diffraction patterns suggested that the crystal structures of the modified fibers did not change significantly during the modification processes. The thermogravimetry results showed that the thermal stability of soybean protein/PET fiber kept well. The wearability tests indicated that the breaking strength and elasticity of the original fabric were well retained by the modified fabrics. The soybean protein/PET fabric had good levels of hydrophilicity and softness when the binding rate was below 3.0%.

Properties of SiC-SiC Composites Produced Using CVR Converted Graphite Cloth to SiC Cloth

1994 ◽  
Vol 365 ◽  
Author(s):  
W. Kowbel ◽  
C. Kyriacou ◽  
F. Gao ◽  
C. A. Bruce ◽  
J. C. Withers
Keyword(s):  
Low Cost ◽  
Chemical Vapor ◽  
Manufacturing Processes ◽  
Processing Conditions ◽  
Carbon Fabric ◽  
Sic Composites ◽  
Sic Reinforcement ◽  
Polymer Infiltration ◽  
Strength Retention ◽  
Graphite Fabric

ABSTRACTNicalon fiber is the primary reinforcement in SiC-SiC composites currently produced by a variety of techniques including CVI and polymer infiltration. Low strength retention at high temperatures of the Nicalon fibers limits the choice of manufacturing processes which can be employed to produce low cost SiC-SiC composites. MER has developed a new SiC reinforcement based upon a conversion of low cost carbon fabric to SiC via a Chemical Vapor Reaction (CVR) process. This new SiC filaments exhibit an excellent creep resistance at temperatures up to 1600°C. Several SiC-SiC composites were fabricated using graphite fabric converted to SiC fabric utilizing the CVR process combined with a slurry infiltration and CVI densification. A correlation between processing conditions, microstructure and properties of the SiC-SiC composites are discussed in detail.

Influence of Surface and Interface Properties on the Electrical Conductivity of Silicon Nanomembranes

2011 ◽  
Vol 383-390 ◽  
pp. 7220-7223 ◽  
Author(s):  
Xiang Fu Zhao ◽  
Ping Han ◽  
Shelley Scott ◽  
Max G. Lagally
Keyword(s):  
Electrical Conductivity ◽  
Hydrofluoric Acid ◽  
Surface Modifications ◽  
Interface Trap Density ◽  
Interface Trap ◽  
Interface Properties ◽  
Interface Modification ◽  
Surface And Interface ◽  
Van Der Pauw ◽  
Silicon Nanomembranes

Electrical conductivity of silicon nanomembranes (SiNMs) was measured by van der Pauw method under two surface modifications: hydrofluoric acid (HF) treatment and vacuum-hydrogenated(VH) treatment, which create hydrogen-terminated surface; and one interface modification: forming gas (5% H2 in N2) anneal, which causes hydrogen passivated interfaces. The results show that thinner SiNMs are more sensitive to the surface modifications, and HF treatment can cause larger drop of sheet resistance than that caused by VH treatment probably because of Fluorine (F). Forming gas anneal can also improve the conductivity depending on the interface trap density.

Processing Technique and Sound Absorption Property of Three-Dimensional Recycled Polypropylene Nonwoven Composites

2011 ◽  
Vol 287-290 ◽  
pp. 2660-2663 ◽  
Author(s):  
Jia Horng Lin ◽  
Chia Chang Lin ◽  
Jin Mao Chen ◽  
Yu Chun Chuang ◽  
Ying Hsuan Hsu ◽  
...  
Keyword(s):  
Sound Absorption ◽  
Three Dimensional ◽  
Noise Pollution ◽  
Processing Technique ◽  
Work Efficiency ◽  
Pet Fabric ◽  
Recycled Polypropylene ◽  
Needle Punching ◽  
Pollution Problem ◽  
Pet Fibers

Noise pollution has become a kind of serious environmental pollution problems. It not only makes people feel fatigue but also affects their concentration and work efficiency. People’s health and work efficiency could be promoted by improving and reducing the noise pollution problem. In this research, the recycled polyester (PET) fibers, polypropylene (PP) fiber and flame-retardant-hollow-crimp 7D PET fiber with a ratio of 2:1:7, 2:2:6, 2:3:5, 2:4:4, and 2:5:3 were fabricated and then needle-punched, creating the PET/PP/PET fabric. Next, a layer of recycled PP selvage and a layer of fabric were laminated in turn on the base fabric before needle-punching with a certain punching-depth, which was repeated until the 10-layer PET/PP/PET nonwoven composite was completed. Finally, the resulting PET/PP/PET nonwoven composite was measured with its physical properties and sound absorption ability.

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