Facile Cellulose Dissolution and Characterization in the Newly Synthesized 1,3-Diallyl-2-ethylimidazolium Acetate Ionic Liquid

Zhang, Hui; Xu, Yaoguang; Li, Yuqi; Lu, Zexiang; Cao, Shilin; Fan, Mizi; Huang, Liulian; Chen, Lihui

doi:10.3390/polym9100526

Cited by 34 publications

(27 citation statements)

References 43 publications

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“…However, above the 300°C, the stability of the chemically treated sample decreases compared with that of pure rice husk. This is attributed to the presence of lignin moieties in the pure sample, which confers better stability on them [27]. Surface morphologies of pure rice husk and the chemically treated Supplementary Figure 2c.…”

Section: Resultsmentioning

confidence: 98%

In Vitro Biocompatibility of Electrospun Poly(ε-Caprolactone)/Cellulose Nanocrystals-Nanofibers for Tissue Engineering

Dutta

Patel

Seo

et al. 2019

Journal of Nanomaterials

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Cellulose nanocrystals (CNCs) have emerged as promising materials for the fabrication of micro/nanoplatforms that can replace tissues more effectively. CNCs offer interesting properties that facilitate the enhancement of polymer properties. Cytotoxicity of rice husk-derived CNCs was evaluated through WST-1 assay in the presence of human mesenchymal stem cells. Electrospinning technique was used to fabricate nanofibers of poly-ε-caprolactone and its composites. Significant improvement in the mechanical property was observed in the composites relative to the pure polymer. This improvement was attributed to the better interfacial interactions between the polymer matrix and CNCs. Notably, better cell viability and differentiation were observed with the composite nanofibers than with the pure polymers. The osteogenic potential of the fabricated nanofibers was assessed by alizarin red S staining and real-time PCR. Enhanced mineralization occurred in the presence of the composite rather than pure polymer nanofibers. Furthermore, the higher levels of osteogenic markers observed with the media containing the composites clearly indicated their osteogenic potential. These results suggested that fabricated composites have the potential to be used as a biomaterial for tissue engineering applications.

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Section: Resultsmentioning

confidence: 98%

In Vitro Biocompatibility of Electrospun Poly(ε-Caprolactone)/Cellulose Nanocrystals-Nanofibers for Tissue Engineering

Dutta

Patel

Seo

et al. 2019

Journal of Nanomaterials

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“…The XRD patterns of cellulose regenerated using [Emim][Ac] showed that the main diffraction peak was shifted and widened at 2θ = 20.7° ( Figure 2 b). The existence of peaks at approximately 2θ = 20° suggested the conversion of crystal structure into amorphous state [ 41 , 43 , 44 ]. In contrast, the cellulose regenerated using alkali solutions including NaTU, TBAH, and TBPH displayed diffraction peaks at 2θ = 12.3°, 14–18°, 20.4°, and 22.3° corresponding to the cellulose II crystal structure [ 45 ].…”

Section: Resultsmentioning

confidence: 99%

Effect of Cellulose Solvents on the Characteristics of Cellulose/Fe2O3 Hydrogel Microspheres as Enzyme Supports

Park

Jung

et al. 2020

Polymers

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Cellulose hydrogels are considered useful biocompatible and biodegradable materials. However, as few cellulose-dissolving solvents can be used to prepare cellulose hydrogel microspheres, the use of unmodified cellulose-based hydrogel microspheres for enzyme immobilization remains limited. Here, we prepared cellulose/Fe2O3 hydrogel microspheres as enzyme supports through sol-gel transition using a solvent-in-oil emulsion. Cellulose-dissolving solvents including 1-ethyl-3-methylimidazolium ([Emim][Ac]), an aqueous mixture of NaOH and thiourea, tetrabutylammonium hydroxide, and tetrabutylphosphonium hydroxide were used to prepare regular shaped cellulose/Fe2O3 microspheres. The solvent affected microsphere characteristics like crystallinity, hydrophobicity, surface morphology, size distribution, and swelling properties. The immobilization efficiency of the microspheres for lipase was also significantly influenced by the type of cellulose solvent used. In particular, the lipase immobilized on cellulose/Fe2O3 microspheres prepared using [Emim][Ac] showed the highest protein loading, and its specific activity was 3.1-fold higher than that of free lipase. The immobilized lipase could be simply recovered by a magnet and continuously reused.

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“…Solvent‐based processes using milder conditions and focusing on the lignin removal are inter alia the organosolv and organocell process. Another possibility for cellulose dissolution directly from biomass could be the use of ionic liquids (IL), having been widely used for cellulose dissolution in recent years . In particular, ILs with strong hydrogen‐bond acceptors with anions such as chloride or acetate have shown the ability to dissolve cellulose under relatively mild conditions …”

Section: Lignocellulosic Biomassmentioning

confidence: 99%

Natural Polymers from Biomass Resources as Feedstocks for Thermoplastic Materials

Müller

Zollfrank

Schmid

2019

Macro Materials & Eng

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With the objective of a more sustainable circular economy, one long‐term goal is the utilization of renewable resources as feedstock for the production of polymer‐based materials. In order to successfully process such materials using existing industrial‐scale technologies or even recycling processes, the natural polymers must have thermoplastic properties. With only a few exceptions, natural polymers are not thermoplastic. However, chemical and physical modification techniques are able to induce thermoplasticity in natural polymers from biomass resources such as cellulose, lignin, and chitin. Modification techniques focus on masking the hydroxyl groups to disrupt dense hydrogen bonding and so enable polymer chain mobility upon heating. The introduction of long alkyl chains into the polymer backbone effectively improves the thermoplastic processing of natural polymers. With regard to polymer blending, chemical grafting and graft copolymerization are powerful tools for enhancing compatibility. For both chemical and physical modification, solvents such as ionic liquids and deep eutectic solvents are currently being explored for biomass and fiber processing and show promise for the future development of thermoplastic biopolymers. This review describes possible modifications, potential processing difficulties, and gives a summary of relevant studies described in the scientific literature.

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Facile Cellulose Dissolution and Characterization in the Newly Synthesized 1,3-Diallyl-2-ethylimidazolium Acetate Ionic Liquid

Cited by 34 publications

References 43 publications

In Vitro Biocompatibility of Electrospun Poly(ε-Caprolactone)/Cellulose Nanocrystals-Nanofibers for Tissue Engineering

In Vitro Biocompatibility of Electrospun Poly(ε-Caprolactone)/Cellulose Nanocrystals-Nanofibers for Tissue Engineering

Effect of Cellulose Solvents on the Characteristics of Cellulose/Fe2O3 Hydrogel Microspheres as Enzyme Supports

Natural Polymers from Biomass Resources as Feedstocks for Thermoplastic Materials

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