Fabrication and Characterization of Photochromic Spirooxazine/Polyvinylidene Fluoride Fiber Membranes via Electrospinning

Abstract

In this study, photochromic spirooxazine material of N-methyl-3,3-dimethyl-9’-hydroxy-spiro [2H-indole-2-[3H] naphtho [2,1-b] [1,4] oxazine] was synthesised. Spirooxazine/PVDF fiber (SPF) membranes with different contents of spirooxazine were successfully prepared by electrospinning. The SPF membranes were characterised by FTIR and SEM. The photochromic properties and contact angle of the SPF membranes were evaluated. The results show that the SPF membranes change from colorless to blue when exposed to UV light, but they revert to their original colour after the UV light disappears. The colour difference and contact angle of the SPF membranes firstly increase and then decrease with a rise in the content of spirooxazine.

One-step electrospinning PMMA-SPO with hierarchical architectures as a multi-functional transparent screen window

“…The peaks at 873 cm À1 and 752 cm À1 were assigned to symmetrical and asymmetrical stretching vibrations of the naphthalene ring. 29,30 By blending SPO with PMMA, the relevant characteristic peaks confirmed that PMMA-SPO fibers had been successfully fabricated. After the PMMA-SPO fiber was irradiated by UV, the peaks representing CQN at 3450 cm À1 and 1632 cm À1 almost disappeared, indicating that PMMA-SPO involved a ringopening reaction.…”

Preparation and characterization of plasticized polyvinyl chloride composite film based on photochromic intelligent cooling

“…All the above peaks are the characteristic peaks of the wall material polyoxymethylenemelamine; however, no characteristic peaks of spirooxazine photochromic powders are found near 1243, 1081, and 980 cm −1 , indicating that the photochromic powders are coated completely. [ 31 ] For the PVC/photochromic powders composite films, the peaks of 2957, 2929, 1734, and 695 cm −1 mainly come from the contribution of the plasticized PVC film. [ 32 ] The peak around 1549 cm −1 is found in the PVC/photochromic powders composite films, mainly due to the stretching vibration of C═N on the photochromic powders, indicating the existence of photochromic powders in the plasticized PVC composite films.…”

Induction Heating Characteristics of Electroless Ni-Coated CFRP for Deicing and Anti-Icing

“…Moazzenchi synthesized nickel nanoparticles on the surface of polyester fabric using electroless nickel plating, which exhibits ideal conductivity [33,34]. Peng used a laser to process polyester fabric and successfully conducted electroless nickel plating on its surface to research its electrothermal and electromagnetic shielding performance [35][36][37]. However, so far, there have been no attempts to deposit nickel on CFRP via electroless plating as a heater for aircraft deicing.…”