Silk fibroin, a biodegradable component of silk, is increasingly used for various applications and studied intensively. Recently, technique preparing nanofibers without using chemicals has been gaining attention from the environmental impact safety perspectives. This study focuses on structure observation ground silk fibroin (GF) prepared grinding method, which physical nanofibrillation method. The fabricated nanofiber samples were examined in detail X-ray diffraction (XRD), differential...

Fabrication of a 2D square lattice array intentionally tapered micro-/nano-silicon pillars by metal-assisted chemical etching (MACE) silicon wafers is reported. The are rod shaped with the cross-sections in range 0.2 × 0.2-0.9 0.9 μm2 and heights 3-7 μm. spacing between was controlled 0.5 3.0 While after MACE had high aspect ratio ∼1:5, subsequent anisotropic wet potassium hydroxide solution led to 80°-89.5° tapers smooth sidewalls. resulting taper angle showed relation geometry pillar...

Silk fibroin nanofibrils can be obtained through fibrillation of fibers using wet-mechanical methods with a strong shear force. These nanofibers possess favorable mechanical properties and high thermal stability due to the secondary β-sheet structure native fibroin. Consequently, ductile chitosan composite films optical transparency were successfully fabricated reinforcement nanofibrils. The crystallinity increased nanofibril ratio. Furthermore, swelling ratio film decreased increasing...

A nonregenerated silk-fibroin nanofiber film (FNF) was prepared from silk cocoon via a simple watergrinding treatment in never-dried state and paper-making process after sericins were removed. Fibers 150‒ 200 nm width observed the atomic force microscopy micrographs of surface films,confirming that fine nanofibers successfully obtained by grinding treatment. Moreover, FNF maintained its β-sheet structure. Conventional regenerated fibroin films also for comparison their morphological,...

Many researchers have shown interest in the reinforcement of commodity thermoplastic with natural fibers. However, drawback fibers is their low thermal processing temperatures, that border around 200℃. In this investigation, we tried to improve stability use flexible epoxy surface coating could facilitate engineering thermoplastics. Jute fabric and Polyamide 6 (PA6) composites were prepared by compression molding. The decomposition characteristics jute evaluated using thermo gravimetric...

Recycled PET (R-PET) is well known to exhibit brittle behavior in the presence of notches and indicated low heat distortion temperature. In addition, it hard prevent some impurities such as cap or label bottle that mixed into R-PET during recycling process. this paper, effect amounts kinds compatibilizers on morphological characteristics mechanical performance recycled poly(ethylene terephthalate) compounded with polyethylene (PE), polypropylene (PP), polystyrene (PS) was investigated. From...

A high-performance liquid chromatographic method is described for the simultaneous determination of ajmaline and quinidine in human plasma. With 0.5 ml plasma sample a quinidine, concentrations as low 0.001 0.01 micrograms ml-1, respectively, could be detected technique used to investigate effect on pharmacokinetics ajmaline. Four healthy subjects were given oral (50 mg) alone or combination with sulphate (200 separate occasions. When was administered alone, its less than 0.03 ml-1....

We present a novel laser processing technique that enables us to form nanoholes (d < 100 nm) on polymer film. The important feature of the is utilization hybrid target, which contains an organic and metal nanoparticles. Au nanoparticles were fixed glass substrate (avoiding aggregation nanoparticles) by involving self-assembled monolayer 3-aminopropyltrimethoxysilane. film was coated with thin poly(methyl acrylate) then irradiated nanosecond 532 nm pulsed light. light excited resonant plasmon...

Abstract The effect of the amount reactive additive and screw speed during extrusion on morphological characteristics mechanical performance recycled poly(ethylene terephthalate)(RPET) was investigated. With an increase in ethylene–glycidyl methacrylate copolymer (E–GMA) content, a gradual Izod impact strength RPET/E–GMA blends initially recorded. Subsequent increases E–GMA content to above 13.5 wt % led drastic enhancement toughness blends. Meanwhile, density decreased with increasing...

Abstract Jute fabric‐reinforced sandwich composites were fabricated using engineering thermoplastics. The jute fabrics precoated with thermosetting resin to improve their thermal resistance before molding of the composites. Thermal gravimetric analysis (TGA) studies revealed that coated decomposed at higher temperature than uncoated jute. onset degradation fibers also falls between and thermoset resins. This indicates presence good interfacial bonding both Isothermal TGA could withstand...

Abstract This study considers the effects of pellet geometry and compatibilization on its moisture absorption thermal degradation behavior recycled polyethylene terephthalate (RPET) polypropylene (RPP) blend with ultimate goal optimizing design pellets to enhance their processability. The isoconversion Flynn–Wall–Ozawa (FWO) was used for kinetic study, which suitable RPET/RPP in N 2 while second order polynomial function fitted oxidative air. Finer geometries, such as powders, were found...

Composites composed entirely of biodegradable polymer materials such as polylactic acid (PLA) and natural fibers are attracting attention alternatives to petroleum-based plastic materials. Since have low dispersibility in bulk resins PLA, the use fiber surface treatment agents can improve physical properties composites. In this study, accelerated degradation tests were conducted at 60°C for upto 2000 h on specimens containing cotton a ratio 40 wt% PLA matrix. The results showed that...

In general, high mechanical properties such as higher impact strength and thermal resistance are required for injection molded applications. Recycled PET (RPET) is well known to exhibit brittle behavior in the presence of notches indicated low heat distortion temperature. Therefore, we tried improve toughness RPET by incorporating E-GMA, talc filler engineering plastics an modifier increase rigidity temperature RPET. As a result, these blends with E-GMA exhibited significantly stiffness...