نوع مقاله : تالیفی
نویسندگان
1 گروه علوم و مهندسی کاغذ، دانشگاه علوم کشاورزی و منابع طبیعی گرگان
2 گروه علوم و مهندسی کاغذ، دانشکده مهندسی چوب و کاغذ، دانشگاه علوم کشاورزی و منابع طبیعی گرگان
چکیده
کلیدواژه‌ها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
Lignin is a natural, non-toxic, aromatic polymer rich in various functional groups and is obtained from the wood and stems of lignocellulosic trees and plants. Currently, the pulp industry produces a large amount of industrial lignin every year, which are usually burned only to recover energy without creating a suitable added value. One of the ways to create value for lignin is to use it to produce polyurethanes. Polyurethanes (PU) have many applications and are one of the most important materials that are currently obtained on the basis of oil and from fossil sources. For this reason, lignin-based polyurethanes as a sustainable alternative to petroleum-based polyurethanes are the focus of researchers and industries for the development of polymer materials. In this article, some types of industrial lignins are being produced in pulping processes, the main methods of producing liquid polyol from solid lignin for the production of bio-based polyurethanes, the difference between lignin-based and petroleum-based polyurethane, and technology evaluation are examined. Polyurethanes produced from biological polyols such as lignin contribute to the economic cycle. The use of common isocyanates (synthesis with highly toxic phosgene gas) in the production of polyurethane is considered an important environmental problem. In this research, the production of non-isocyanate polyurethanes (NIPU) based on lignin is also discussed.
کلیدواژه‌ها [English]
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