Dynamic wettability and contact angles of poly(vinylidene fluoride) nanofiber membranes grafted with acrylic acid

Abstract

Abstract. Wettability has been recognized as one of the most important properties of fibrous materials for both fundamental and practical applications. In this study, the plasma induced grafting of acrylic acid (AAc) was applied to improve the wettability of the electrospun poly(vinylidene fluoride) (PVDF) nanofiber membranes. The diameter and chemical structure of the modified PVDF nanofibers were characterized by scanning electron microscopy (SEM) and Fourier transform infrared (FTIR). Nitrogen adsorption based on BET (Brunauer, Emmett and Teller) principle was employed to measure the specific surface areas and porosities of the modified nanofiber membrances. The contact angles of the modified membrane were evaluated by drop shape analysis (DSA) and the modified Washburn method. The dependence of contact angles on specific surface area and porosity was also discussed in this paper. Water adsorptions were used to evaluate the dynamic wetting behavior of the grafted membranes by a dynamic adsorption apparatus (CDCA100-F). The experimental results revealed that the wettablity of the modified PVDF membrane was significantly affected by both surface and porous contact angles.

Influence of oxygen plasma treatment parameters on poly(vinylidene fluoride) electrospun fiber mats wettability

“…[1][2][3][4][5] This polymer has at least four known crystalline phases (α, β, γ and δ), being the β phase the one with the largest piezoelectric response. [3,6] PVDF has been used in various fields including tissue engineering, filtration, air cleaning, rechargeable batteries and sensors, among others.…”

Physicochemical Characterization of Oil Palm Decanter Cake (OPDC) for Residual Oil Recovery

“…The CPO absorption rate was significantly higher than water absorption rate in regards to the OPDC, 0.1042  0.05 µL/s and 0.0265  0.05 µL/s, respectively. The OPDC is a fibrous material which basically has two main adsorption mechanisms, surface adsorption (initial contact angles) followed by capillary adsorption (Huang et al 2010). Carmody et al (2007) studied the adsorption mechanism of oil on raw cotton fiber, and highlighted that surface adsorption occurred when the oil coated the fiber and the uptake of oil was conducted by the capillaries.…”

Nanofibrous solid dosage form of living bacteria prepared by electrospinning

“…oped in the textile industry [5][6][7][8], but in the recent years, applications have been published also in various biomedical fields such as wound dressing [9], wound healing [10], sterile filtration [11], tissue engineering [12,13] and drug delivery [14][15][16][17][18][19]. In former studies bioactive ingredients such as proteins and DNA have been embedded successfully in nanofibers mainly for tissue engineering purposes, while living prokaryotic cells were encapsulated by this technique mainly for industrial application in bioreactors utilizing their metabolic activity [20][21][22].…”