1. |
- Mu, Liwen, et al.
(author)
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[N-Methyl-2-pyrrolidone][C1–C4 carboxylic acid] : novel solvent system with exceptional lignin solubility
- 2015
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In: Chemical Communications. - 1359-7345 .- 1364-548X. ; 51:70, s. 13554-13557
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Journal article (peer-reviewed)abstract
- Novel solvent systems composed of N-methyl-2-pyrrolidone and C1–C4 carboxylic acid exhibit unique physicochemical properties, e.g. large polarity, low viscosity and excellent hydrogen bonding capacity, which have demonstrated excellent lignin solubility that outperforms conventional solvents and ionic liquids.
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2. |
- Mu, Liwen, et al.
(author)
-
Non-corrosive green lubricants : strengthened lignin–[choline][amino acid] ionic liquids interaction via reciprocal hydrogen bonding
- 2015
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In: RSC Advances. - 2046-2069. ; 5:81, s. 66067-66072
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Journal article (peer-reviewed)abstract
- A series of novel green lubricants with dissolved lignin in [choline][amino acid] ([CH][AA]) ionic liquids (ILs) have been synthesized in this work. The effect of lignin on the thermal and tribological properties of the lignin/[CH][AA] lubricants was systematically investigated by means of thermogravimetric analysis, differential scanning calorimetry, and a friction and wear tester. The lignin in [CH][AA] has been demonstrated to be an effective additive to improve thermal stability, reduce the wear rates and stabilize the friction coefficients of lignin/[CH][AA] lubricants. Density function theory calculations on the electronic structure of [CH][AA] ILs reveal the atomic natural charge of ILs and their hydrogen bonding capability with lignin. Moreover, these green lubricants show excellent anti-corrosive properties against commercial aluminum and iron boards. The strong physical adsorption of [CH][AA] ILs onto the steel surface and the reciprocal hydrogen bonding between [CH][AA] ILs and lignin synergistically contribute to the enhanced lubrication film strength and thus the tribological properties of these new lubricants. This work provides a new perspective on utilizing complete bio-products in advanced tribological lubrication systems. In addition, this will open a new application venue for lignin to improve product value in lignocellulosic biomass utilization.
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3. |
- Aad, G, et al.
(author)
-
- 2015
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swepub:Mat__t
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