Preparation and characterization of cellulose and konjac glucomannan blend film from ionic liquid

Abstract

Blend films from cellulose and konjac glucomannan (KGM) in room temperature ionic liquid 1-allyl-3-methylimidazolium chloride were satisfactorily prepared by coagulating with water. The composition of the blend films was gravimetrically analyzed, and the compatibility of the two natural polymers was characterized by Fourier transform infrared spectroscopy and wide-angle X-ray diffraction. The results indicate good compatibility and strong interactions between cellulose and KGM, resulting in almost no loss of the water-soluble KGM from the blend films even after the water coagulating and washing. However, microstructure analyses portrayed phase separations in the blend films, namely, egg-like new phase particles were embedded in a continuous matrix base (MB). Phase diagram analysis and differential scanning calorimetry of the phase inversion coagulation process suggest that relative low molecular mass part of both cellulose and KGM formed the continuous MB, whereas the egg-like new phase particles were super patterns of relative high molecular mass of both polymers, which played an important role in strengthening the blend material.

Langmuir–Blodgett Procedure to Precisely Control the Coverage of Functionalized AFM Cantilevers for SMFS Measurements: Application with Cellulose Nanocrystals

“…Indeed, similar GM films have been shown to contain more water than XYL films and could be slightly more flexible. These results are consistent with previous work reporting the strong interactions between the cellulose and GM, which is the main hemicellulose in softwood . This hemicellulose can form a hydrogen bond with the hydrophilic cellulose surfaces, and interactions are favored by the lack of galactose substitution, as in the case of konjac GM.…”

“…These results are consistent with previous work reporting the strong interactions between the cellulose and GM, which is the main hemicellulose in softwood. 48 This hemicellulose can form a hydrogen bond with the hydrophilic cellulose surfaces, and interactions are favored by the lack of galactose substitution, as in the case of konjac GM. Xylan used in this study displays arabinose and glucuronic acid moieties and provides lower adhesion forces than GM, in agreement with previous study.…”

Self-Assembling Behavior of Cellulose Nanoparticles during Freeze-Drying: Effect of Suspension Concentration, Particle Size, Crystal Structure, and Surface Charge

“…When CNC I aqueous suspension was exposed under visible spectrum of sunlight, the incident light was not only absorbed within the larger CNC I aggregates, but was reflected or scattered at interfaces of separated phases, resulting in little light being transmitted through the CNC I suspension. 39 Therefore, HPH process promoted the dispersion of CNC I in water. However, the morphology of each CNC I was mostly unchanged after homogenization, suggesting that the fifth pass HPH process only dispersed CNC I but did not reduce their dimension (determined by the TEM results above).…”

1-allyl-3-methylimidazolium chloride pretreatment of seaweed industrial waste for bioethanol conversion

“…In fact, 2 h was a sufficient and relatively short pretreatment time, which may have been a result of the low content of lignin in FR, in contrast to the longer reaction time needed with other lignocellulosic materials. 30 In addition, longer pretreatment time would not ensure a better glucose conversion rate and could alternatively cause cellulose degradation, according to the reports in the literature. 31 Therefore, a 2-h incubation time was adopted in subsequent experiments in the study.…”