Synthesis and Characterization of P (AAEA-Co-Aa)-PVP-PEG/Gold Nanoparticle Composite Hydrogel with Pore and Semi-Interpenetration Structure

Abstract

A semi-interpenetrating network hydrogel with pore structure (P-S-IPN) was prepared by solution polymerization with 4-acetyl acryloyl ethyl acetate (AAEA) and crylic acid (AA) as monomers, polyvinylpyrrolidone (PVP) as the second network and polyving akohol 2000(PEG2000) as a pore-foaming agent. Gold nanoparticle composite hydrogel (GNPs gel) was obtained through in-situ reduction reaction by using P-S-IPN as a template. P-S-IPN exhibits excellent mechanical strength, the maximum compressive strength is 14.0 Mpa. The influence of the dosage of PEG2000 on the swelling/deswelling properties of P-S-IPN and GNPs gel was investigated. The pore structures could shorten the time that P-S-IPN takes to reach swelling equilibrium from 170min to 75min, improve the ability of P-S-IPN to absorb AuCl4-. The swelling/deswelling properties of GNPs gel under an applied voltage showed when the concentration of NaCl solutions exceed 0.025mol/L, the hydrogel swells, when the concentration of NaCl solutions is below 0.025mol/L, it deswells.

Mechanochemical Formation of Poly(melamine-formaldehyde) Microplastic Fibers During Abrasion of Cleaning Sponges

“…Both manufacturers and consumers have the responsibility to mitigate MPF pollution derived from sponges. Manufacturers are recommended to improve both hot and cold pressing molding processes in order to create sponges with a high-density shrunken cellular structure, thereby enhancing their structural toughness and wear resistance. Consumers are encouraged to alter their consumption habits by opting for cleaning products made from natural fibers (such as loofah and bamboo) and reducing the use of low-wear-resistant sponges available on the market.…”