Preparation and Characterization of Cellulose Nanofibril/Polyvinyl Alcohol Composite Nanofibers by Electrospinning

Abstract

This work undertook to prepare nanofibers of cellulose nanofibrils (CNF)/polyvinyl alcohol (PVA) composite by electrospinning, and characterize the electrospun composite nanofibers. Different contents of CNFs isolated from hardwood bleached kraft pulp (HW-BKP) by 2,2,6,6-tetramethylpiperidine-1-oxy radical (TEMPO)-mediated oxidation were suspended in aqueous polyvinyl alcohol (PVA) solution, and then electrospun into CNF/PVA composite nanofibers. The morphology and dimension of CNFs were characterized by transmission electron microscopy (TEM), which revealed that CNFs were fibrillated form with the diameter of about 7.07 ± 0.99 nm. Morphology of the electrospun nanofiber observed by field-emission scanning electron microscopy (FE-SEM) showed that uniform CNF/PVA composite nanofibers were manufactured at 1~3% CNF contents while many beads were observed at 5% CNF level. Both the viscosity of CNF/PVA solution and diameter of the electrospun nanofiber decreased with an increase in CNF content. The diameter and its distribution of the electrospun nanofibers helped explain the differences observed in their morphology. These results show that the electrospinning method was successful in preparing uniform CNF/PVA nanofibers, indicating a great potential for manufacturing consistent and reliable cellulose-based nanofibrils for scaffolds in future applications.

Surface Modification of Tempo-Mediated Cellulose Nanofibril With Octadecylamine

“…Instead of cellulose nanocrystal that was obtained from harsh acid hydrolysis which remained only the crystal part region, cellulose nanofibrils are a combination of amorphous and crystalline region of cellulose fibrils [15]. Figure 3 shows that cellulose nanofibrils have long entagled fibrils up to micron in length while the diameter was below than 10 nm [16]. Unfortunately, we did not have the picture of modified amidated cellulose nanofibril.…”

Studies on Nano Cellulose Century Fiber Composites

“…Chemical modification cellulose has been an important route production of multifunctional materials. biodegradable composite films for membrane and packaging applications are developed by method using modified cellulose with alcohol) in different compositions [8,15,16]. These films are characterized for mechanical, moisture absorption, gas barrier, and biodegradable properties [16,17].…”

“…Chemical modification of important route for the multifunctional materials. High strength membrane and by film casting with poly(vinyl erent compositions [8,15,16]. These mechanical, moisture barrier, and biodegradable properties good transparency, biodegradable ve exhibited better barrier properties with increase in percentage of modified Literature review revealed that reported cellulose nano extracted from abundantly available as widelyused in the The century nano used to cast various structural , electronic and packaging…”

“…Isolation assisted by oxidation pretreatment Tetramethylpiperidine-1-oxyl (TEMPO) facilitates. Other methods include steam explosion and electro-spinning [7][8][9][10][11]. Nano fibrillated cellulose (NFC) reinforced composites are produced using phenolic resin.…”

Influence of sonication treatment on supramolecular cellulose microfibril-based hydrogels induced by ionic interaction

“…The suspension was termed cellulose microfibrils (CMFs). The diameters of the CMFs are estimated to be in the range of nano to micron size (7.07 AE 0.99 nm to 10 mm) [19]. The sonication technique is an emerging method for preparing cellulose fibrils with nano size [20].…”