STUDY ON THE DISSOLUTION OF CELLULOSE IN &lt;I&gt;N&lt;/I&gt;-ALLYLPYRIDINIUM CHLORIDE IONIC LIQUID AND CO-SOLVENT COMPOSITES

Zhao, Dan; Fu, Linlin; Zhang, Juan; Li, He; Liu, Mengshuai; Fu, Jiangtao; Wang, Wei

doi:10.3724/sp.j.1105.2012.11407

Cited by 5 publications

(6 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It was found that a further increase in the loading concentration of CNHs could not provide structural integrity to fabricate thin films of less than 100 μm in thickness, which could be related to the upper limit of doping, possibly for pristine CNHs to cellulose ratios. However, functionalization of the CNHs and dissolving the cellulose in ionic liquids [ 36 ] could increase the endurance of Cnh-cel composite sheets, while compromising other properties. A typical setup of the tensile strength measurement of a Cnh-cel sheet is shown in Fig.…”

Section: Discussionmentioning

confidence: 99%

Synthesis and characterization of conductive flexible cellulose carbon nanohorn sheets for human tissue applications

et al. 2020

View full text Add to dashboard Cite

Background Conductive sheets of cellulose and carbon nanomaterials and its human skin applications are an interesting research aspect as they have potential for applications for skin compatibility. Hence it is needed to explore the effects and shed light on these applications. Method To fabricate wearable, portable, flexible, lightweight, inexpensive, and biocompatible composite materials, carbon nanohorns (CNHs) and hydroxyethylcellulose (HEC) were used as precursors to prepare CNH-HEC (Cnh-cel) composite sheets. Cnh-cel sheets were prepared with different loading concentrations of CNHs (10, 20 50,100 mg) in 200 mg cellulose. To fabricate the bio-compatible sheets, a pristine composite of CNHs and HEC was prepared without any pretreatment of the materials. Results The obtained sheets possess a conductivity of 1.83 × 10− 10 S/m and bio-compatible with human skin. Analysis for skin-compatibility was performed for Cnh-cel sheets by h-CLAT in vitro skin sensitization tests to evaluate the activation of THP-1 cells. It was found that THP-1 cells were not activated by Cnh-cel; hence Cnh-cel is a safe biomaterial for human skin. It was also found that the composite allowed only a maximum loading of 100 mg to retain the consistent geometry of free-standing sheets of < 100 μm thickness. Since CNHs have a unique arrangement of aggregates (dahlia structure), the composite is homogeneous, as verified by transmission electron microscopy (TEM) and, scanning electron microscopy (SEM), and other functional properties investigated by Raman spectroscopy, Fourier transform infrared spectroscopy (FT-IR), conductivity measurement, tensile strength measurement, and skin sensitization. Conclusion It can be concluded that cellulose and CNHs sheets are conductive and compatible to human skin applications.

show abstract

Section: Discussionmentioning

confidence: 99%

Synthesis and characterization of conductive flexible cellulose carbon nanohorn sheets for human tissue applications

et al. 2020

View full text Add to dashboard Cite

show abstract

“…It was found that a further increase in the loading concentration of CNHs could not provide structural integrity to fabricate thin lms of less than 100 µm in thickness, which could be related to the upper limit of doping, possibly for pristine CNHs to cellulose ratios. However, functionalization of the CNHs and dissolving the cellulose in ionic liquids (38) could increase the endurance of Cnh-cel composite sheets, while compromising other properties. A typical setup of the tensile strength measurement of a Cnh-cel sheet is shown in Figure 7.…”

Section: Discussionmentioning

confidence: 99%

Synthesis and characterization of conductive flexible cellulose carbon nanohorn sheets for human tissue applications

Selvam

Nagahata

Kato

et al. 2020

Preprint

View full text Add to dashboard Cite

Background: Conductive sheets of cellulose and carbon nanomaterials and its human skin applications are an interesting research aspect as they have potential for applications for skin compatibility. Hence it is needed to explore the effects and shed light on these applications.Method: To fabricate wearable, portable, flexible, lightweight, inexpensive, and biocompatible composite materials, carbon nanohorns (CNHs) and hydroxyethylcellulose (HEC) were used as precursors to prepare CNH-HEC (Cnh-cel) composite sheets. Cnh-cel sheets were prepared with different loading concentrations of CNHs (10, 20 50,100 mg) in 200 mg cellulose. To fabricate the bio-compatible sheets, a pristine composite of CNHs and HEC was prepared without any pretreatment of the materials. Results: The obtained sheets possess a conductivity of 1.83×10-10 S/m and bio-compatible with human skin. Analysis for skin-compatibility was performed for Cnh-cel sheets by h-CLAT in vitro skin sensitization tests to evaluate the activation of THP-1 cells. It was found that THP-1 cells were not activated by Cnh-cel; hence Cnh-cel is a safe biomaterial for human skin. It was also found that the composite allowed only a maximum loading of 100 mg to retain the consistent geometry of free-standing sheets of < 100 µm thickness. Since CNHs have a unique arrangement of aggregates (dahlia structure), the composite is homogeneous, as verified by transmission electron microscopy (TEM) and, scanning electron microscopy (SEM), and other functional properties investigated by Raman spectroscopy, Fourier transform infrared spectroscopy (FT-IR), conductivity measurement, tensile strength measurement, and skin sensitization.Conclusion: It can be concluded that cellulose and CNHs sheets are conductive and compatible to human skin applications.

show abstract

“…[APy]Cl and [EMIM]DEP were synthesized as described in previous work. 22 , 23 [APy]Cl was synthesized by the following process. Pyridine and chloropropylene were mixed in a three-mouth flask at a molar ratio of 1:1.1.…”

Section: Methodsmentioning

confidence: 99%

“…Several drops of concentrated nitric acid were used to remove the oxide film on the surfaces of copper grains (20)(21)(22)(23)(24)(25) in a beaker. The copper grains were soaked with ethylene diamine solution and repeatedly washed with distilled water.…”

Section: Measurements Of the Dpsmentioning

confidence: 99%

“…N -allylpyridinium chloride IL ([APy]Cl) and 1-ethyl-3-methylimidazolium diethylphosphonate IL ([EMIM]DEP) were also used as the solvent for the dissolution of cellulose, which have low viscosity. 22 , 23 However, there are still some limitations to the application of ILs, such as their relatively high viscosity, which slows down the dissolution of cellulose. 24 To improve the disadvantages of ILs, some solvents have been added to ILs as co-solvents.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Dissolution and recovery of cellulose from pine wood bits in ionic liquids and a co-solvent component mixed system

Liu

Zhang

Sun

et al. 2019

Journal of Engineered Fibers and Fabrics

Self Cite

View full text Add to dashboard Cite

The dissolution and recovery of cellulose from pine wood bits with two types of ionic liquids and co-solvents were explored. The results revealed that 1-ethyl-3-methylimidazolium diethylphosphonate ionic liquid/dimethylsulfoxide (mass ratio 1:0.5) could dissolve pine cellulose within 8 min at 105°C. Moreover, the degree of polymerization of the regenerated cellulose reached 244. The dissolved cellulose could be regenerated from the component solution when water was added. Then, the regenerated cellulose was characterized by X-ray powder diffraction, Fouriertransform infrared spectroscopy, and thermal gravimetric analysis measurements. The results revealed that there was no derivatization of the reaction in the process of dissolution and that dissolving the pine cellulose was a direct process. The crystalline structure of the cellulose was converted from cellulose I to cellulose II after regeneration. The regenerated cellulose was also found to have good thermal stability.

show abstract

STUDY ON THE DISSOLUTION OF CELLULOSE IN <I>N</I>-ALLYLPYRIDINIUM CHLORIDE IONIC LIQUID AND CO-SOLVENT COMPOSITES

Cited by 5 publications

References 8 publications

Synthesis and characterization of conductive flexible cellulose carbon nanohorn sheets for human tissue applications

Synthesis and characterization of conductive flexible cellulose carbon nanohorn sheets for human tissue applications

Synthesis and characterization of conductive flexible cellulose carbon nanohorn sheets for human tissue applications

Dissolution and recovery of cellulose from pine wood bits in ionic liquids and a co-solvent component mixed system

Contact Info

Product

Resources

About