Grafting Polytetrafluoroethylene Micropowder via in Situ Electron Beam Irradiation-Induced Polymerization

Abstract

Decreasing the surface energy of polyacrylate-based materials is important especially in embossed holography, but current solutions typically involve high-cost synthesis or encounter compatibility problems. Herein, we utilize the grafting of polytetrafluoroethylene (PTFE) micropowder with poly (methyl methacrylate) (PMMA). The grafting reaction is implemented via in situ electron beam irradiation-induced polymerization in the presence of fluorinated surfactants, generating PMMA grafted PTFE micropowder (PMMA–g–PTFE). The optimal degree of grafting (DG) is 17.8%. With the incorporation of PMMA–g–PTFE, the interfacial interaction between polyacrylate and PTFE is greatly improved, giving rise to uniform polyacrylate/PMMA–g–PTFE composites with a low surface energy. For instance, the loading content of PMMA–g–PTFE in polyacrylate is up to 16 wt %, leading to an increase of more than 20 degrees in the water contact angle compared to the pristine sample. This research paves a way to generate new polyacrylate-based films for embossed holography.

Rapid Fabrication of Poly(methyl methacrylate) Devices for Lab-on-a-Chip Applications Using Acetic Acid and UV Treatment

“…According to the FTIR spectrum in Figure a, pristine PMMA shows spectra regions at around 2950, 1723, 1142, and 750 cm –1 , which corresponded to the presence of CH 3 , CO stretching, COC, and CH 2 twisting modes, respectively. The FTIR spectrum obtained from pristine PMMA is consistent with our previous results. − As shown in Figure b,c, IR spectra of PMMA after the UV treatment and PMMA after acetic acid and UV treatment displayed the same absorption peaks exhibited by pristine PMMA, indicating that UV irradiation and acetic acid did not change the chemical property of PMMA. This result differs from our previous study on PMMA bonding mediated by acetic acid at room temperature, where we hypothesized that an acetic acid molecule directly participated in the reaction to bridge two PMMA substrates in 20 min .…”

Preparation of a New Biocomposite Designed for Cartilage Grafting with Antibiofilm Activity

“…The peaks located in the lower-frequency region corresponding to the vibrations of −CF 2 groups at 501, 554, and 639 cm –1 were matched to the wagging, deformation, and rocking modes, respectively. 45 , 46 Additionally, the characteristic peaks of the apatite were observed at 1050 and 605 cm –1 .…”

Polytetrafluoroethylene-like Nanoparticles as a Promising Contrast Agent for Dual Modal Ultrasound and X-ray Bioimaging

“…The FTIR spectrum of s -PTFE≈ NP sample, recorded between 500 and 4000 cm –1 (Figure A,B), displays several bands attributed to C–F and C–H bonds although the FTIR spectrum of a pure PTFE sample would display only −CF 2 bands. − The absence of any accompanying O–H bands excludes the possibilities that the appearance of C–H bands in the samples arises from either the benzoquinone initially present in the commercial sealant (organic excipient) or from the alcohol used during the preparation stage of the s -PTFE≈ NPs. Rather, the produced s -PTFE≈ sample is clean and devoid of any contamination stemming from the organic excipient or the alcohol used in the preparation.…”