A Facile Approach for Preparing Ag Functionalized Nonwoven Polypropylene Membrane to Improve Its Electrical Conductivity and Electromagnetic Shielding Performance

Abstract

The commonly used preparation methods of polypropylene functionalization require special equipment to be put into use or take a long time, which limits its application. Therefore, a simple and economical method for preparing silver functionalized nonwoven polypropylene membrane was studied herein. Triethanolamine was first coated on the surface of the polypropylene, and then Ag was deposited on the surface of polypropylene using a continuous reduction reaction of triethanolamine and silver ions. Surface morphology, crystal structure, and surface chemistry during the preparation of Ag functionalized nonwoven polypropylene were investigated. The electrical conductivity, electromagnetic shielding properties, and washing durability of the treated nonwoven polypropylene were also studied. It was found that Ag was uniformly deposited on the surface of the nonwoven polypropylene, and the coating reaction did not change the chemical structure of the polypropylene. The crystallinity and thermal stability of polypropylene were improved after silver coated polypropylene. The washing experiment results showed that the weight gain rate of the treated nonwoven relative to the untreated sample after the 90 min washing ranged from 6.72% to 9.64%. The resistance test results showed that the maximum surface resistivity of Ag coated nonwoven polypropylene was about 1.95 × 105 Ω, which was 64,615 times lower than the original. In addition, the results showed that the maximum electromagnetic shielding effectiveness of the Ag coated nonwoven polypropylene was about 71.6 dB, showing a very good electromagnetic shielding effect.

Inflight fiber printing toward array and 3D optoelectronic and sensing architectures

“…S3F also show that the closely packed silver particles inside the Ag fiber are of tens of nanometers. The overall crystallinity and crystalline size of the iFP Ag fibers compare similarly with literature values of solution processed silver line/fiber features (crystallinity 25 to 60% and crystalline size 20 to 80 nm) (31,32). However, high temperatures (i.e., > 200°C) and postprocessing (i.e., sintering) are usually needed in those approaches; in comparison, iFP operates at sub-90°C in a single step to produce the silver fibers.…”

Roll to roll in situ preparation of recyclable, washable, antibacterial Ag loaded nonwoven fabric

“…As compared with neat PP fiber, PVA/PP fabric (Fig. 4 e) shows strong O 1 s signal as well as C 1 s signals at 284.6 eV (C–C/C–H), 285.6 eV (C–O–H), and 288.5 eV (H–C=O) 38 . Besides, the O 1 s spectrum of PVA/PP fabric can be fitted into two peaks at 532.3 eV and 533.2 eV 41 (Fig.…”

“…The absorbance bands of pure PP fiber at 2950 cm −1 and 2916 cm −1 are due to the asymmetric stretching vibration of –CH 3 and –CH 2 – groups; and those at 2867 cm −1 and 2837 cm −1 are assigned to the symmetric stretching of –CH 3 and –CH 2 –. The absorbance bands at 1375 cm −1 and 1456 cm −1 are ascribed to the asymmetric and symmetric scissoring vibrations of –CH 3 38 , 39 . The FTIR spectrum of Ag/PP fiber is similar to that of PP fiber.…”

Facile One-Step Deposition of Ag Nanoparticles on SiO2 Electrospun Nanofiber Surfaces for Label-Free SERS Detection and Antibacterial Dressing

“…For instance, Shao et al synthesized Ag-functionalized nonwoven polypropylene by coating TEA on the surface of polypropylene and then using the continuous reduction reaction of TEA and Ag + , which has good electrical conductivity and electromagnetic shielding performance. 25 Wang et al used a simple hydrothermal method and modification technology to fabricate a new type of TEAmodified titanate nanotube adsorbent with high adsorption capacity. 26 However, the application of substrate materials composed of SiO 2 nanofibers and TEA in the field of SERS has not been reported yet.…”

“…Thus, it is easy to deposit nanoparticles on the surface of the matrix material through bridging of TEA. For instance, Shao et al synthesized Ag-functionalized nonwoven polypropylene by coating TEA on the surface of polypropylene and then using the continuous reduction reaction of TEA and Ag + , which has good electrical conductivity and electromagnetic shielding performance . Wang et al used a simple hydrothermal method and modification technology to fabricate a new type of TEA-modified titanate nanotube adsorbent with high adsorption capacity .…”