Functionalized Hybrid Coatings on ABS Surfaces by PLD and Dip Coatings

The present research develops a novel in-situ synthesis method to produce a high performance nanocomposite coating on polyethylene terephthalate (PET) fabric as an enhanced UV-protective textile. Reduced graphene oxide-silver (rGO-Ag) multi-layer nanocomposite was in-situ synthesized on the PET fabric through the direct redox reaction between the Ag + ions and GO sheets by using ultrasonic and thermal treatment. The X-ray diffraction and field emission scanning electron microscope confirmed that the well-synthesized Ag nanoparticles (AgNPs) loaded on PET fabric in presence of the GO sheets by using ultrasonic waves without reducing and capping agents. In this research, GO sheets were used as reducing and capping agents along with the ultrasonic treatment at low temperature condition. The final average size of the synthesized AgNPs in solution, on the PET surface and in the freestanding film is lower than 100 nm. The ultraviolet protection factor (UPF) of the PET fabric incorporating multi-layer rGO-Ag nanocomposite as a UV blocking system could reach to 6145.66, up to the 183-fold higher than uncoated PET fabric (UPF 33.63). In addition, the final fabric demonstrates a good air permeability and antibacterial properties due to the effective coating of rGO-Ag nanocomposite on PET surface.

Section: Resultssupporting

confidence: 90%

Section: Antibacterial Activitymentioning

confidence: 99%

Enhanced ultraviolet‐protectivetextiles based on reduced graphene oxide‐silver nanocomposites on polyethylene terephthalate usingultrasonic‐assisted in‐situthermal synthesis

Babaahmadi

Abuzade

Montazer

2022

“…[ 29 ] This also confirms that pure MLPB can also adhere to the AF surface due to electrostatic interactions. [ 30 ] For the samples PrT100, PrT130, PrT150, and PrT150_BC, in which AFs have been coated by MLPB and E51, an ester group was formed as the acid anhydride in the coating agent has been ring opened and reacted with the epoxy group of the epoxy resin, so the absorption peak of CO in ester group appeared at 1,736 cm −1 . [ 25,26 ] For the spectrum of T‐AF (without coating) extracted from master batch, there were no peaks appeared at 1,736 cm −1 .…”

Section: Resultsmentioning

confidence: 99%

“…The bonds were mainly from coating agent and the electrostatic interactions between the coating and surface led to the good adhesion. [ 30 ] The fracture direction of the composite material is shifted to the interface during tensile fracture, causing damage, and peeling of the interface, and Figure 9 appears delamination of the interrupted surface. For the PrT150_BC composite material processed after the coating agent has been cured, dispersed particles can be seen on the residual interface of the stretched section (as shown by the red circle in Figure 10), which is that the cured interface layer peel off during processing interfacial layer particles.…”

Section: Resultsmentioning

confidence: 99%

Construction of an in situ interfacial layer for aramid fiber reinforced styrene butadiene rubber composites

Luo

Yang

Xiang

et al. 2020

In this work, the in situ interface layer composite was prepared by using the coating agent dispersion. Aramid fiber (AF) was modified with lithium chloride aqueous solution, and then coated with the blends of a low‐molecular weight maleated polybutadiene liquid rubber (MLPB), the epoxy resin (E51), and 2‐ethyl‐4‐methylimidazole (2E4MZ). The in situ interface layer was formed via the reaction of epoxy group with anhydride group in the presence of the accelerator 2E4MZ and covulcanization of MLPB with styrene butadiene rubber (SBR) in the process of preparing vulcanized AF reinforced SBR. It can be seen from analysis of scanning electronic microscopy, attenuated total reflection Fourier transform infrared, and thermogravimetric analysis that the in situ interfacial layer was a uniform and dense interfacial layer on the fiber surface and was not be destroyed during processing. The results of the dynamic mechanical analysis and mechanical properties showed that the in situ interface layer formed in processing had higher flexibility and better integrity than the interface layer prepared before processing, which is favorable for stress relaxation, and the in situ interface layer imparts better tensile strength and tear strength to the composite. The 100% modulus of composites with in situ interface layers was 14.6% higher than that of composites prepared without uncoated AF.

“…It can be clearly seen that the MF-TFMB film containing CF 3 groups can effectively reduce the wetting properties of the material. 41 Therefore, TFMB-modified melamine fibers have improved water repellency in daily use.…”

Section: Contact Angle and Surface Free Energy Of Materialsmentioning

confidence: 99%

Preparation of poly(melamine‐formaldehyde‐2,2′‐bis(trifluoromethyl)benzidine) high‐performance fibers

Liu

Chen

et al. 2022

Melamine formaldehyde fiber is widely used in various fields because of its excellent heat resistance and flame‐retardant properties. In this study, melamine and paraformaldehyde are used as the main raw materials, 2,2′‐bis(trifluoromethyl)benzidine (TFMB) is successfully introduced into the molecular chain. The TFMB modified spinning solutions (MF‐TFMB) are obtained by one‐step copolymerization, the TFMB‐modified melamine‐formaldehyde fibers (MFF‐TFMB) are prepared by dry spinning. The surface contact angle and surface energy are measured by a contact angle measuring instrument. The thermal stability and mechanical properties of the fibers are measured by a thermogravimetric analyzer and a single‐fiber strength tester. The results show that the introduction of the TFMB group reduces the surface free energy of the polymer and effectively improves the heat resistance and mechanical properties of the fiber. When the addition amount of TFMB is 3%, the MFF‐TFMB‐3% fiber has smooth surface and bubble‐free inside, the breaking strength is 2.25 cN/dtex and the elongation at break is 11.85%. The limiting oxygen index is 32.5%, and the mass loss rate is decreased from 63.88% to 51.36% at 400°C. The fiber has excellent thermal stability and flame‐retardant properties.