Optical cellulose fiber made from regenerated cellulose and cellulose acetate for water sensor applications

Abstract

In this study an optical cellulose fiber for water sensoring was prepared by using a sequential preparation strategy. The core of the fiber was prepared from dissolved cellulose, in [EMIM]OAc, which was dry–wet spun into water. The cladding layer on the cellulose core was produced by coating a layer of cellulose acetate, dissolved in acetone, using a filament coater. The chemical and optical properties of both regenerated cellulose and cellulose acetate were studied from cast films using ultraviolet–visible and Fourier-transform infrared spectroscopy measurements. Regenerated cellulose film was observed to absorb UV light, passing the visible light wavelengths. Cellulose acetate film was observed to pass the whole light wavelength range. The mechanical strength and topography of the prepared optical cellulose fiber were investigated through tensile testing and SEM imaging. The mechanical performance of the fiber was similar to previously reported values in the literature (tensile strength of 120 MPa). The prepared optical fiber guided light in the range of 500–1400 nm. The attenuation constant of the cellulose fiber was observed to be 6.3 dB/cm at 1300 nm. The use of prepared optical cellulose fiber in a water sensor application was demonstrated. When the fiber was placed in water, a clear attenuation in the light intensity was observed. The studied optical fiber could be used in sensor applications, in which easy modifiability and high thermal resistance are beneficial characteristics. Graphic abstract Coaxial cellulose acetate-regenerated cellulose fiber for transporting light in sensor optical fiber sensor applications.

Luminescent Gold Nanocluster‐Methylcellulose Composite Optical Fibers with Low Attenuation Coefficient and High Photostability

“…Overall, MC 2.0 fibers achieved the highest maximum strain (52.4%) of all the tested compositions, and it can be considered significantly high for a cellulose‐based fiber. [ 55,56 ] The low MC content was deduced to allow low‐density looser packing of the MC polymer chains, which enabled enhanced ductility. In contrast, higher MC content became more densely packed, resulting in high stiffness but reduced flexibility.…”

“…The performance of various MC‐based fibers was generally approximately on par or better than other known cellulose‐based optical fibers. [ 55,56 ]…”

“…[ 42–54 ] Among a few examples, cellulose‐derived optical fibers have been reported based on hydroxypropyl cellulose (core)‐cellulose butyrate (cladding) fibers and cellulose acetate‐coated regenerated cellulose fibers. [ 55,56 ] Their preparation still involves high‐temperature treatments and ionic liquids. Methylcellulose (MC) is a well‐known charge‐neutral polymer (RI ≈ 1.49) studied as a potential alternative for oil‐based polymers for, e.g., foods, detergents, paints, adhesives, cosmetics, pharmaceuticals, and functional gels.…”

Eco-Friendly Cellulose Nanofiber Extraction from Sugarcane Bagasse and Film Fabrication

“…CNFs have higher strength and modulus than CNCs at the same concentration of nanocellulose [4]. Isolated cellulose fibers and their derivatives have attracted attention for their applications ranging from paper, packaging, sensor, water purification, textile to biomedical devices and drug delivery, due to their advantageous properties such as low density, high surface area, and good mechanical strength [5][6][7][8][9][10][11].…”

Challenges in the Fabrication of Biodegradable and Implantable Optical Fibers for Biomedical Applications

“…An alternative extrusion method used to fabricate cellulose-based optical fibers included a wet-jet spinning device equipped with a spinning nozzle. H. Orelma et al [ 70 ] reported the fabrication of a core filament that was made from cellulose dissolved in [EMIM] AcO, which was passed through a nozzle into a water coagulation bath that was kept at a constant spinning rate of 0.5 mL/min. After spinning, the filaments were stored in water for 2 h and subsequently dried under tension at room temperature and ambient humidity.…”