Synthesis and Characterization of Xylan Grafted with Polyethylene Glycol in Ionic Liquid and Their Use as Moisture‐Absorption/Retention Biomaterials

Zhang, Xueqin; Wen, Xiaoxiang; Zhang, Aiping; Wang, Xiaoying; Zhong, Linxin; Liu, Chuanfu; Sun, Run‐Cang

doi:10.1002/mame.201500377

Cited by 13 publications

(3 citation statements)

References 44 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Biomaterials are a rapidly expanding class of materials and have been of interest in recent decades due to their abundance, low cost, biocompatibility, and tunable morphological and physical properties. − These materials have been broadly used for the development of membranes and fibers for liquid and gas separation and sensing, fabrication of scaffolds for cartilage and bone regeneration, − and the creation of nanostructures for drug delivery . The study of biomaterials includes aspects of medicine, biology, chemistry, engineering, environmental science, and materials science.…”

Section: Introductionmentioning

confidence: 99%

A Hierarchical Model To Understand the Processing of Polysaccharides/Protein-Based Films in Ionic Liquids

et al. 2018

View full text Add to dashboard Cite

In recent years, biomaterials from abundant and renewable sources have shown potential in medicine and materials science alike. In this study, we combine theoretical modeling, molecular dynamics simulations, and several experimental techniques to understand the regeneration of cellulose/silk-, chitin/silk-, and chitosan/silk-based biocomposites after dissolution in ionic liquid and regeneration in water. We propose a novel theoretical model that correlates the composite's microscopic structure to its bulk properties. We rely on modeling non-cross-linked biopolymers that present layer-like structures such as β-sheets and we successfully predict structural, thermal, and mechanical properties of a mixture of these biomolecules. Our model and experiments show that the solubility of the pure substance in the chosen solvent can be used to modulate the amount of crystallinity of the biopolymer blend, as measured by attenuated total reflectance Fourier transform infrared spectroscopy (ATR-FTIR). Thermogravimetric analysis (TGA) shows that the decomposition temperature of the blended biocomposites compared to their pure counterparts is reduced in accordance with our theoretical predictions. The morphology of the material is further characterized through scanning electron microscopy (SEM) and shows differently exposed surface area depending on the blend. Finally, differential scanning calorimetry (DSC) is performed to characterize the residual water content in the material, essential for explaining the regeneration process in water. As a final test of the model, we compare our model's prediction of the Young's modulus with existing data in the literature. The model correctly reproduces experimental trends observed in the Young's modulus due to varying the concentration of silk in the biopolymer blend.

show abstract

Section: Introductionmentioning

confidence: 99%

A Hierarchical Model To Understand the Processing of Polysaccharides/Protein-Based Films in Ionic Liquids

et al. 2018

View full text Add to dashboard Cite

show abstract

“…The degradation of carbohydrates (cellulose and hemicelluloses) was probably caused by glutaric acid formed upon esterification in AmimCl [ 25 ], which was similar to the previous report [ 33 ]. After esterification, the M w of lignin samples increased from 15,105 (L0) to 29,554 (L5) g/mol, confirming the successful introduction of glutaryl groups into lignin [ 34 ]. The M w of lignin sample L5 was much higher than the theoretical value calculated from the PS of esterified lignin, which was possibly due to the diesterification of lignin at high glutaric anhydride dosage.…”

Section: Resultsmentioning

confidence: 99%

Esterification Mechanism of Bagasse Modified with Glutaric Anhydride in 1-Allyl-3-methylimidazolium Chloride

et al. 2017

Self Cite

View full text Add to dashboard Cite

The esterification of bagasse with glutaric anhydride could increase surface adhesion compatibility and the surface of derived polymers has the potential of immobilizing peptides or proteins for biomedical application. Due to its complicated components, the esterification mechanism of bagasse esterified with glutaric anhydride in ionic liquids has not been studied. In this paper, the homogenous esterification of bagasse with glutaric anhydride was comparatively investigated with the isolated cellulose, hemicelluloses, and lignin in 1-allyl-3-methylimidazolium chloride (AmimCl) to reveal the reaction mechanism. Fourier transform infrared (FT-IR) indicated that the three components (cellulose, hemicelluloses, and lignin) were all involved in the esterification. The percentage of substitution (PS) of bagasse was gradually improved with the increased dosage of glutaric anhydride (10–40 mmol/g), which was primarily attributed to the increased esterification of cellulose and hemicelluloses. However, the PS fluctuation of lignin led to a decrease in the PS of bagasse at high glutaric anhydride dosage (50 mmol/g). The esterification reactivity of bagasse components followed the order of lignin > hemicelluloses > cellulose. The esterification mechanism was proposed as a nucleophilic substitution reaction. Nuclear magnetic resonance (NMR) analysis indicated that lignin aliphatic hydroxyls were prior to be esterified, and primary hydroxyls were more reactive than secondary hydroxyls in cellulose and hemicelluloses.

show abstract

“…Carboxymethyl xylan-g-poly (propylene oxide) was prepared to enhance the hydrophobicity for film preparation [ 15 ]. Xylan grafted with polyethylene glycol as moisture-absorption/retention biomaterials was obtained in ionic liquids [ 16 ]. Hemicelluloses-g-polyacrylamide was prepared in diluted alkaline aqueous solution to improve the solubility in water of the water-insoluble hemicelluloses [ 17 ].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Characteristic of Xylan-grafted-polyacrylamide and Application for Improving Pulp Properties

Kong

Liu

et al. 2017

Materials

View full text Add to dashboard Cite

Recently, more attentions have been focused on the exploration of hemicelluloses in the paper industry. In this work, xylan-grafted-polyacrylamide (xylan-g-PAM) biopolymers were synthesized by the graft copolymerization of xylan with acrylamide, and their interaction with fibers was also investigated to improve waste newspaper pulp properties with or without cationic fiber fines. The influences of synthesis conditions were studied on the grafting ratio and the grafting efficiency of biopolymers. Prepared biopolymers were characterized by FTIR, 13C NMR, TGA and rheology. It was found that the grafting of PAM on xylan was conductive to improve xylan properties, such as the solubility in water, rheological features, and thermal stability, and the maximum grafting ratio was achieved to 14.7%. Moreover, xylan-g-PAM could obviously enhance the mechanical properties of waste paper pulps. Xylan-g-PAM also played the dominant role in increasing the strength of paper in the combination with prepared cationic fine fibers. When the amounts of xylan-g-PAM and cationic fiber fines were 1.0 wt % and 0.5 wt %, the mechanical properties such as the tensile index was increased by 49.09%, tear index was increased by 36.54%, and the burst index was increased by 20.67%, when compared with the control handsheets. Therefore, xylan-g-PAM as the new biopolymer could be promising in the application of strength agents for the paper industry as well as cationic fiber fines.

show abstract

Synthesis and Characterization of Xylan Grafted with Polyethylene Glycol in Ionic Liquid and Their Use as Moisture‐Absorption/Retention Biomaterials

Cited by 13 publications

References 44 publications

A Hierarchical Model To Understand the Processing of Polysaccharides/Protein-Based Films in Ionic Liquids

A Hierarchical Model To Understand the Processing of Polysaccharides/Protein-Based Films in Ionic Liquids

Esterification Mechanism of Bagasse Modified with Glutaric Anhydride in 1-Allyl-3-methylimidazolium Chloride

Synthesis and Characteristic of Xylan-grafted-polyacrylamide and Application for Improving Pulp Properties

Contact Info

Product

Resources

About