By Yebo Li, Xiaolan Luo, Shengjun Hu
This short outlines the latest advances within the creation of polyols and polyurethanes from renewable assets, almost always vegetable oils, lignocellulosic biomass, starch, and protein. the common techniques for the creation of polyols from all the above pointed out feedstocks are brought and the homes of the ensuing polyols and polyurethanes also are mentioned.
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Additional resources for Bio-based Polyols and Polyurethanes (SpringerBriefs in Molecular Science)
Because of their high versatility, polyols from vegetable oils and their derivatives have been used to produce various PU materials such as foams, elastomers, rigid plastics, and coatings, which have shown properties mostly comparable to those of their petroleum-based analogs. In spite of their promise, vegetable oils and their derivatives still face challenges such as technical and/or cost barriers to production of high resilient flexible foams. Future efforts in this ﬁeld will be of high interest.
Dai H, Yang L, Lin B, Wang C, Shi G (2009) Synthesis and characterization of the different soy-based polyols by ring-opening of epoxidized soybean oil with methanol, 1, 2-ethanediol and 1,2-propanediol. J Am Oil Chem Soc 86:261–267 23. Guo A, Cho Y, Petrović ZS (2000) Structure and properties of halogenated and nonhalogenated soy-based polyols. J Polym Sci Polym Chem 38:3900–3910 40 2 Polyols and Polyurethanes from Vegetable Oils … 24. Kiatsimkul PP, Suppes GJ, Hsieh Fh, Lozada Z, Tu YC (2008) Preparation of high hydroxyl equivalent weight polyols from vegetable oils.
1). Hemicellulose is a branched heteropolymer containing both pentose and hexose units, such as xylose, arabinose, glucose, mannose, and galactose. Xylan is a major component of hemicellulose and has diverse structures depending on the botanic source. The general structure of xylan is a linear backbone © The Author(s) 2015 Y. 1007/978-3-319-21539-6_3 45 3 Lignocellulosic Biomass-Based Polyols for … 46 4 CH2OH O HO O 4' 1 CH2OH O 1' HO OH CH2OH O O O O HO OH OH Fig. 1 Chemical structure of cellulose 4 O O HO 4' 1 O O O 1' HO OH O O HO OH OH Fig.