Dissolution and regeneration of hide powder/cellulose composite in Gemini imidazolium ionic liquid

Wang, Guowei; Guo, Jia-rong; Zhuang, Linghua; Wang, Yan; Xu, Bin

doi:10.1016/j.ijbiomac.2015.02.029

Cited by 14 publications

(3 citation statements)

References 63 publications

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“…The applications of ILs in related collagen research have focused mainly on a solvent medium of blend [16][17][18], pretreatment solvent of collagen extraction [10,19], or conditions of collagen dissolution and changes in regenerated-collagen properties [20][21][22]. Wang et al [16] studied the dissolution performance of white-hidepowder from leather-making in [C 6 O 2 (mim) 2 ][Br] 2 , and found that when the white hide powder solubility reached 8%, the dissolving time was 55 min at 120°C. The triple helix structure of white-hide-powder was destroyed partially during [C 6 O 2 (mim) 2 ][Br] 2 dissolution.…”

Section: Introductionmentioning

confidence: 99%

Investigation of the solubility and dispersion degree of calf skin collagen in ionic liquids

2019

J Leather Sci Eng

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The dissolution of collagen in ionic liquids (ILs) was highly dependent on the polarity of ILs, which was influenced by their sorts and concentrations. Herein, the solubility and dispersion degree of collagen in two sorts of ILs, namely 1-ethyl-methylimidazolium tetrafluoroborate ([EMIM][BF 4 ]) with low polarity and 1-ethyl-3methylimidazolium acetate ([EMIM][Ac]) with high polarity in a concentration range from 10% to 70% at 10°C were investigated. When 150 mg of collagen was added to 30 mg of ILs, the minimum soluble collagen concentration was 0.02 mg/mL in 70% [EMIM][BF 4 ] with lowest polarity and the maximum was 3.57 mg/mL in 70% [EMIM][Ac] with highest polarity, which indicates that soluble collagen and insoluble collagen fibers were both present. For insoluble collagens, differential scanning calorimetry showed that the thermal-stability was weakened when increasing the ILs concentration and polarity, and the fiber arrangement was looser with a more uniform lyophilized structure, observed by atomic force microscopy and scanning electron microscopy. For soluble collagens, electrophoresis patterns and Fourier transform infrared spectroscopy showed that no polypeptide chain degradation occurred during dissolution, but the thermal denaturation temperature decreased by 0.26°C~7.63°C with the increase of ILs concentrations, measured by ultra-sensitive differential scanning calorimetry. Moreover, the aggregation of collagen molecules was reduced when ILs polarity was increased as determined by fluorescence measurements and dynamic light scattering, which resulted in an increased loose fiber arrangement observed by atomic force microscopy. If the structural integrity of collagen needs to be retained, then the ILs sorts and concentrations should be considered.

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Section: Introductionmentioning

confidence: 99%

Investigation of the solubility and dispersion degree of calf skin collagen in ionic liquids

2019

J Leather Sci Eng

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“…Presently, the study on ionic liquids has extended to the treatment of CTSWs and their derivatives (Han et al, 2014; Liu et al, 2015; Wang et al, 2015; Zhou et al, 2010), which aims to obtain high-value-added products from the CTSWs. Zhou et al (2010) studied the dissolution characteristics of collagen fibre in ionic liquids.…”

Section: New Indirect Dechroming Techniquesmentioning

confidence: 99%

The status and developments of leather solid waste treatment: A mini-review

2016

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Leather making is one of the most widespread industries in the world. The production of leather goods generates different types of solid wastes and wastewater. These wastes will pollute the environment and threat the health of human beings if they are not well treated. Consequently, the treatment of pollution caused by the wastes from leather tanning is really important. In comparison with the disposal of leather wastewater, the treatment of leather solid wastes is more intractable. Hence, the treatment of leather solid wastes needs more innovations. To keep up with the rapid development of the modern leather industry, various innovative techniques have been newly developed. In this mini-review article, the major achievements in the treatment of leather solid wastes are highlighted. Emphasis will be placed on the treatment of chromium-tanned solid wastes; some new approaches are also discussed. We hope that this mini-review can provide some valuable information to promote the broad understanding and effective treatment of leather solid wastes in the leather industry.

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“…Lignocellulosic biomass is composed of cellulose (30-50%), hemicellulose (15-35%), and lignin (10-30%) (Dadi et al, 2006;Pronyk and Mazza, 2016) in addition to a signi cant amount of silicon (Ndazi et al, 2007). Cellulose is the most abundant biopolymer on Earth, it is composed of glucose monomers connected by β-1,4-glycosidics bonds (Chen et al, 2017;Dadi et al, 2006;Ibrahim et al, 2015;Meenatchi et al, 2017;Nemestóthy et al, 2017), and it has interesting characteristics such as biodegradability, biocompatibility, hydrophilicity, thermal and chemical stability, and renewability (Jiang et al, 2011;Wang et al, 2015). Hemicellulose is a complex polysaccharide, composed predominantly of xylose (pentoses sugars) and other sugars (hexoses).…”

Section: Introductionmentioning

confidence: 99%

Conversion of rice husk biomass into reducing sugars: influence of pretreatment with water and [C16MIM][Br-] ionic liquid

Bohn¹,

Anchieta²,

Kuhn³

et al. 2021

Preprint

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Rice husk is an agricultural lignocellulosic-rich waste which can be used in the production of second-generation ethanol. A biomass pretreatment is necessary to release structural sugars because of the recalcitrance-related properties of lignin and silicon. The use of a long chain imidazolium ionic liquid (IL), 1-hexadecyl-3-methylimidazolium bromide ([C16MIM][Br−]), for rice husk pretreatment is reported for the first time. The influence of the [C16MIM][Br−]:water ratio and temperature on reducing sugars yield was investigated using an experimental design. Structural, chemical, and morphological modifications were observed by Scanning Electron Microscopy (SEM), X-Ray Diffraction (XRD), Fourier Transform Infrared Spectroscopy (FTIR) and Thermogravimetric Analysis (TGA). Higher temperature (160°C) and lower water content (1:5, IL:water) improved sugar yield. The validation assay (180°C, 1:20 IL:water ratio, 10% (w/v) of biomass, 12 h) resulted in 38% yield of reducing sugars and 60% dissolution of biomass, whereas untreated biomass showed only 0.18% yield of reducing sugars. The characterization analysis confirmed the changes in rice husk structure and morphology after pretreatment with IL. Rice husk pretreatment with [C16MIM][Br−] resulted in a higher concentration of reducing sugars compared to untreated biomass. Therefore, solid ionic liquids combined with water could be used as an alternative solvent for lignocellulosic biomass pretreatment.

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Dissolution and regeneration of hide powder/cellulose composite in Gemini imidazolium ionic liquid

Cited by 14 publications

References 63 publications

Investigation of the solubility and dispersion degree of calf skin collagen in ionic liquids

Investigation of the solubility and dispersion degree of calf skin collagen in ionic liquids

The status and developments of leather solid waste treatment: A mini-review

Conversion of rice husk biomass into reducing sugars: influence of pretreatment with water and [C16MIM][Br-] ionic liquid

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