Synthesis of nano‐TiO 2 /fluorinated polyacrylate core‐shell latex and its application in fabric finishing

ACS Appl. Mater. Interfaces

Zheng

Dang

et al. 2019

Antifungal hydrogels with added antifungal drugs have received extensive attention from researchers due to their potential use in various applications, such as wound dressings and ultrasound gel pads. In this study, we proposed and designed an alternative antifungal hydrogel preparation strategy to obtain hydrogels with high antifungal abilities. We employed plasma-activated water (PAW) instead of water in the hydrogel polymerization process to prepare plasma-activated hydrogels (PAHs). Disc diffusion assay results revealed that PAH exhibits satisfactory antifungal activity. Interestingly, the oxidation–reduction potential (ORP) of the PAH was significantly lower than that of conventional polyacrylamide (PAAm) hydrogels, and we provided a possible reaction equation to explain the lower value of ORP in the PAH. Furthermore, using electron spin resonance (ESR) spectroscopy, the hydroxyl radical was detected in PAHs. Although the active ingredients in the hydrogel cannot be quantitatively measured, the hydroxyl radical and NO3 – are speculated to be the main components of PAH with antifungal activity according to ESR spectroscopy and optical emission spectroscopy. Further experiments also showed that PAH has a longer antifungal lifetime than PAW. In summary, the proposed plasma-activated hydrogels can provide valuable preparation strategies for delivering antifungal capabilities and have many potential applications in biomedical fields.

Section: Resultsmentioning

confidence: 99%

“…40,41 Additionally, other polymers using APS as an initiator have no significant antimicrobial activity. 42 Therefore, it is reasonable that the control group (containing APS) has no antifungal activity. The results of this study indicated that ORP did not determine the antifungal activity of PAH.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

A Novel Antifungal Plasma-Activated Hydrogel

ACS Appl. Mater. Interfaces

Zheng

Dang

et al. 2019

“…Over the past decade, a variety of polymeric nanoparticles have been reported in the literature, including polyolefins [11], polyesters [12], polyurethanes [13], polyaryletherketones [14], polysaccharide [15], and polyacrylates [16] as well as their copolymers [16]. Polymeric nanoparticles and their films possess prominent economic value, which are applied for finishing agent [17,18], anticorrosion coating [19], photoresponsive material [20], dielectrics, and adhesives [21].…”

Section: Introductionmentioning

confidence: 99%

Influence of Varied Fluorine Contents on Long-Term Storage Stability of Polyacrylate Nanoparticles and Film Properties

Zhang

Journal of Nanomaterials

et al. 2019

Polyacrylate nanoparticles are widely applied and typically prepared by many polymerization methods. However, poor long-term storage stability of nanoparticles limited their use, so some methods are carried out to overcome it. In this paper, we investigated a series of fluorinated polyacrylate nanoparticles to improve the long-term storage stability of polyacrylate nanoparticles. We found that increasing fluorine content resists the aggregation of nanoparticles during long-term storage. Furthermore, a higher content of fluorine can improve the hydrophobicity of latex polyacrylate film and increase the refractive index of latex polyacrylate film. The properties of the polyacrylate nanoparticles and latex film can thus be controlled by changing fluorine contents, which in turn provides key insights into the design of functional polymer material.

“…From Figure 14, the water contact angle of fluorinated copolymer coating with 1 wt% DFMA rises from 80° of the bare copolymer coating composed of BA, MMA and AA (denoted as PBMA) with DFMA content is 0 wt% to 98°, which shows that a small amount of DFMA can change the coating from hydrophilicity to hydrophobicity. Moreover, the water contact angle increases obviously with the increase of DFMA content and reaches a maximum of 105° when DFMA content is 5 wt%, which is ascribed to the increasing fluorinated groups on the surface of the copolymer coating through their migration towards the surface of the coating based on the driving force of lower surface energy 50,51 . However, the water contact angle has not a marked change when DFMA content continue to rise to 8 and 10 wt%.…”

Section: Resultsmentioning

confidence: 95%

“…Moreover, the water contact angle increases obviously with the increase of DFMA content and reaches a maximum of 105 when DFMA content is 5 wt%, which is ascribed to the increasing fluorinated groups on the surface of the copolymer coating through their migration towards the surface of the coating based on the driving force of lower surface energy. 50,51 However, the water contact angle has not a marked change when DFMA content continue to rise to 8 and 10 wt%.…”

Section: Resultsmentioning

confidence: 99%

Preparation, characterization, and application of hollow nano‐TiO₂@modified graphene/fluorinated copolymer nanocomposite leather finishing agents

Pan

Yang

J of Applied Polymer Sci

et al. 2022

A novel nanocomposite leather‐finishing agent (denoted as H‐TiO2@SDS‐rGO/F‐PBMA) composed of fluorinated copolymer (denoted as F‐PBMA) matrix using methyl methacrylate (abbreviated as MMA), butyl acrylate (abbreviated as BA) as well as acrylic acid (abbreviated as AA) as monomers and H‐TiO2@SDS‐rGO composite nanoparticles as nano‐additives were successfully fabricated by aqueous emulsion polymerization in this paper. The hollow TiO2 nanoparticles (denoted as H‐TiO2) were firstly prepared with tetrabutyl titanate as titanium source wall and tetraethyl silicate as silicon source core through an alkali etching method, and then they were compounded with reduced graphene oxide (rGO) modified by sodium dodecyl sulfate (denoted as SDS‐rGO) for obtaining H‐TiO2@SDS‐rGO composite nanoparticles. Fourier transform infrared spectra, X‐ray diffraction, Raman spectra, scanning electron microscopy, and nuclear magnetic resonance spectra were used to characterize the structure and morphology of different samples. The experimental results reveal that the nanocomposite leather‐finishing agent not only has excellent transparency, but also endows sheepskin better weather resistance, thermal stability, hydrophobicity and mechanical properties compared with traditional leather finishing agents.