Solvability and thermal response of cellulose with different crystal configurations

Chen, Qian; Zheng, Kai; Fan, Q.R.; Wang, Kun; Yang, Haiyan; Jiang, Jianxin; Liu, Shijie

doi:10.1007/s42524-019-0001-z

Cited by 5 publications

(4 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Other factors such as DP and the amount of crystalline fractions can have an important role in thermal degradation of cellulose. Previous studies reported that cellulose II from microcrystalline cellulose has a poorer thermal stability compared to the original microcrystalline cellulose . Here, both RCNFs exhibited slightly lower thermal stability compared to their corresponding raw materials.…”

Section: Resultsmentioning

confidence: 56%

“…Previous studies reported that cellulose II from microcrystalline cellulose has a poorer thermal stability compared to the original microcrystalline cellulose. 75 Here, both RCNFs exhibited slightly lower thermal stability compared to their corresponding raw materials. Both regenerated cellulose samples exhibited slightly lower crystallinity compared to the original pulp ( Figure 4 b), and the CrI of regenerated cellulose further decreased during the fibrillation due to the strong mechanical force.…”

Section: Resultsmentioning

confidence: 83%

See 1 more Smart Citation

A Fast Dissolution Pretreatment to Produce Strong Regenerated Cellulose Nanofibers via Mechanical Disintegration

Sirviö

Lakovaara

2021

Biomacromolecules

View full text Add to dashboard Cite

This study investigates a fast dissolution and regeneration pretreatment to produce regenerated cellulose nanofibers (RCNFs) via mechanical disintegration. Two cellulose pulps, namely, birch and dissolving pulps, with degree of polymerizations of 1800 and 3600, respectively, were rapidly dissolved in dimethyl sulfoxide (DMSO) by using tetraethylammonium hydroxide (TEAOH) as aqueous electrolyte at room temperature. When TEAOH (35 wt % in water) was added to the pulp–DMSO dispersion (pulp:DMSO and TEAOH:DMSO weight ratios of 1:90 and 1:9, respectively), 95% of the dissolving pulp and 85% of the birch pulp fibers dissolved almost immediately. Addition of water caused the regeneration of cellulose without any chemical modification and only a minor decrease of DP, whereas the crystallinity structure of cellulose transformed from cellulose I to cellulose II. The regenerated cellulose could then be mechanically disintegrated into nanosized fibers with only a few passes through a microfluidizer, and RCNF showed fibrous structure. The specific tensile strength of the film produced from both RCNFs exceeded 100 kN·m/kg, and overall mechanical properties of RCNF produced from birch pulp were in line with reference CNF produced by using extensive mechanical disintegration. Although the thermal stability of RCNFs was slightly lower compared to their corresponding original cellulose pulp, the onset temperature of degradation of RCNFs was over 270 °C.

show abstract

Section: Resultsmentioning

confidence: 56%

Section: Resultsmentioning

confidence: 83%

A Fast Dissolution Pretreatment to Produce Strong Regenerated Cellulose Nanofibers via Mechanical Disintegration

Sirviö

Lakovaara

2021

Biomacromolecules

View full text Add to dashboard Cite

show abstract

“…In addition, ssNMR has been applied to distinguish multiple artificial crystalline forms, including cellulose-II irreversibly generated by cellulose-I mercerization (treatment with strong alkaline solutions) or regeneration procedures (solubilization and recrystallization) as well as metastable form III (obtained from evaporation of amines in an ammonia–cellulose complex) and form IV (following heat-treatment of cellulose III). − …”

Section: Solid-state Nmr Studies Of Plant Materialsmentioning

confidence: 99%

Solid-State NMR Investigations of Extracellular Matrixes and Cell Walls of Algae, Bacteria, Fungi, and Plants

et al. 2021

View full text Add to dashboard Cite

Extracellular matrixes (ECMs), such as the cell walls and biofilms, are important for supporting cell integrity and function and regulating intercellular communication. These biomaterials are also of significant interest to the production of biofuels and the development of antimicrobial treatment. Solid-state nuclear magnetic resonance (ssNMR) and magic-angle spinning-dynamic nuclear polarization (MAS-DNP) are uniquely powerful for understanding the conformational structure, dynamical characteristics, and supramolecular assemblies of carbohydrates and other biomolecules in ECMs. This review highlights the recent high-resolution investigations of intact ECMs and native cells in many organisms spanning across plants, bacteria, fungi, and algae. We spotlight the structural principles identified in ECMs, discuss the current technical limitation and underexplored biochemical topics, and point out the promising opportunities enabled by the recent advances of the rapidly evolving ssNMR technology.

show abstract

“…The observed changes in the diffraction pattern not only confirm the structural transformation of CNF from cellulose I to cellulose II when treated with NaOH during the preparation of the aerogel, as shown in the FTIR spectra, but also elucidate a lower thermal stability of the NaOH‐treated aerogel. This is because cellulose II has lower thermal stability compared to cellulose I 53 …”

Section: Resultsmentioning

confidence: 99%

Eco‐friendly production and performance evaluation of water‐resistant cellulose nanofiber bioaerogels

Mawardi,

Saharudin,

Ahmad

et al. 2023

Polymer Engineering & Sci

View full text Add to dashboard Cite

A sustainable and environmentally conscious approach was employed to create a cellulose nanofiber (CNF) bioaerogel. This modified technique was used for its affordability and eco‐friendly nature, involved the use of reduced concentrations of NaOH solution (ranging from 0 to 0.5 M) to disperse the CNFs. The process included mixing, freezing, neutralizing, and freeze‐drying, ultimately resulting in well‐structured 3D bioaerogels. The concentration of NaOH had a significant impact on the properties of the bioaerogels. The density of the aerogels increases with higher concentration of NaOH. All treated aerogels exhibited impressive water resistance and maintained their structural integrity when exposed to water, indicating promising practical applications. This enhanced structural integrity is attributed to CNF chain rearrangement, facilitated by CNF swelling, dissolution in NaOH, and homogenization. FTIR and XRD analyses provided insight into the transition from cellulose I to cellulose‐II in the bioaerogel structure. These findings contribute to the development of eco‐friendly bioaerogels for environmentally conscious applications. Further research is needed to gain a deeper understanding of the process and to optimize conditions for specific bioaerogel properties.

show abstract

Solvability and thermal response of cellulose with different crystal configurations

Cited by 5 publications

References 34 publications

A Fast Dissolution Pretreatment to Produce Strong Regenerated Cellulose Nanofibers via Mechanical Disintegration

A Fast Dissolution Pretreatment to Produce Strong Regenerated Cellulose Nanofibers via Mechanical Disintegration

Solid-State NMR Investigations of Extracellular Matrixes and Cell Walls of Algae, Bacteria, Fungi, and Plants

Eco‐friendly production and performance evaluation of water‐resistant cellulose nanofiber bioaerogels

Contact Info

Product

Resources

About