Preparation and application of dialdehyde nanocellulose reinforced jatropha oil based polymer emulsions as leather fatli
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ORIGINAL RESEARCH
Preparation and application of dialdehyde nanocellulose reinforced jatropha oil based polymer emulsions as leather fatliquors Jianzhong Ma Bin Lyu
. Tiantian Wang . Shuai Yu . Yuehong Zhang .
Received: 19 March 2020 / Accepted: 24 September 2020 Ó Springer Nature B.V. 2020
Abstract Bio-based acrylated epoxidized jatropha oil (AEJO) was developed using a solvent-free synthetic method, and the structure of the resulting product was confirmed by Fourier transform infrared spectroscopy and proton nuclear magnetic resonance (1H NMR) spectra. Subsequently, an amphiphilic polymer emulsion AEJO-AA was prepared by emulsion polymerization using acrylic acid (AA) and AEJO. Moreover, 2, 3-dialdehyde nanocellulose (DNC) was prepared and combined with AEJO-AA emulsion as a fatliquoring agent for goatskin upper leather. The fatliquored leather shows improved mechanical strength and thermal stability. When the
DNC loading is 1.5 wt%, the fatliquored leather exhibits the highest tensile strength of 24.3 MPa, tear strength of 62.2 N/mm and thermal denaturation temperature (Td) of 95.4 °C. The fogging values of the fatliquored leather satisfy the requirements of automobile seat leather. The biochemical oxygen demand (BOD5) and chemical oxygen demand results indicate that the DNC/AEJO-AA emulsion is easily biodegradable. Overall, the developed DNC/AEJOAA emulsion provides a new strategy in the production of bio-based and ecological polymer fatliquor of leather.
Electronic supplementary material The online version of this article (https://doi.org/10.1007/s10570-020-03494-y) contains supplementary material, which is available to authorized users. J. Ma T. Wang S. Yu Y. Zhang B. Lyu College of Bioresources Chemical and Materials Engineering, Shaanxi University of Science and Technology, Xi’an 710021, China J. Ma (&) T. Wang S. Yu Y. Zhang (&) B. Lyu National Demonstration Center for Experimental Light Chemistry Engineering Education (Shaanxi University of Science and Technology), Xi’an 710021, China e-mail: [email protected] Y. Zhang e-mail: [email protected]
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Cellulose
Graphic abstract
Keywords Jatropha oil Dialdehyde nanocellulose Leather fatliquor Mechanical property Fogging value
Introduction Fatliquor is one of the most used leather chemicals in leather industry (Kalyanaraman et al. 2012) since it can penetrate into the collagen fibers of skin and act as a lubricant as well as a plasticizer, thus facilitating the separation and movement of collagen fibers (Ma et al. 2017a, b). Therefore, the fatliquored leather exhibits improved flexibility and softness. Currently, small molecule fatliquors, such as sulfated rapeseed oil, sulfonated castor oil, are widely used due to their advantages of good penetrability and low cost (Lyu et al. 2015). However, these fatliquors exhibit weak interactions with collagen fibers of leather and are susceptible to migrate to the surface of leather (Lyu et al. 2016), leading to shortened service l
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