• 专利标题:   Preparing mercapto-modified nano-silver particle dispersion used in silver antibacterial coating, involves introducing compound with sulfhydryl group and positively charged nanosilver particles to ethanol, introducing nitrogen to remove oxygen, and reacting.
  • 专利号:   CN115612330-A
  • 发明人:   WANG P, ZHANG M, YAN Q, NING X
  • 专利权人:   XINHUA ZHONGRUN CHEM TECHNOLOGY CO LTD
  • 国际专利分类:   B22F001/0545, B22F009/24, C09D133/00, C09D005/08, C09D005/14
  • 专利详细信息:   CN115612330-A 17 Jan 2023 C09D-005/14 202317 Chinese
  • 申请详细信息:   CN115612330-A CN11307396 24 Oct 2022
  • 优先权号:   CN11307396

▎ 摘  要

NOVELTY - Preparing a dispersed solution of mercapto-modified silver nanoparticles, comprises introducing a compound with a mercapto group and silver nanoparticles with a positively charged surface to ethanol. After nitrogen deoxygenation, the mixture is reacted under ultrasound for 1-5 hours to obtain a dispersed solution of mercapto-modified silver nanoparticles. The mass fraction of silver nanoparticles is 0.1-1%, and the mass ratio of the thiol compound to the silver nanoparticles is 0.1-1. The compound with the mercapto group is cysteine, mercaptoethylamine, 3-mercaptopropylamine, and/or 4-amino-2-mercaptopyrimidine. USE - Preparation method of mercapto modified nano silver particle dispersion liquid used for antibacterial coating formulation used in chemical coating of graphene/nano silver. ADVANTAGE - The mercapto-modified nano-silver particle dispersion liquid, graphene-silver particles synergistically enhances surface antibacterial property, solving the problem that the existing silver antibacterial coating has a low utilization rate of silver component, antibacterial efficiency, insufficient antibacterial durability, and bad dispersibility. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparing a long-lasting antibacterial and anti-corrosive water-based coating comprising introducing mercapto-modified silver nanoparticle dispersed solution, graphene oxide, dispersant, leveling agent, thickener, and defoaming agent to a certain amount of aqueous acrylic resin and its derivatives. The mixture is stirred for 0.5-2 hours at 25-40℃.