Structure-properties relationships of cellular materials from biobased polyurethane foams

编号 020029802

推送时间 20210705

研究领域 林产化工 

年份 2021 

类型 期刊 

语种 英语

标题 Structure-properties relationships of cellular materials from biobased polyurethane foams

来源期刊 Materials Science and Engineering: R: Reports

期 第298期

发表时间 20210310

关键词 Polyurethane;  Foams;  Biobased;  Structure-properties;  Sustainable; 

摘要 The polyurethanes (PU) are a very versatile family of materials mainly obtained by combinations of polyols and polyisocyanates. Based on their annual worldwide production of around 20 million tons and a global market of $50 billion (2016), PUs rank 6th among all polymers. Through their value chain, PUs involve different players: (i) the chemists producing most of PUs raw materials, (ii) the PUs producers from the raw materials, (iii) the compounders/assemblers who formulate PUs into their final products, and finally (iv) the end-users. Due to the multiplicity of their structures, PUs can be used in various forms and applications. Cellular materials are the largest part of this market (more than 60 %) with segments including the furniture, automotive, bedding, insulation, building or construction markets. Two main types of foam can be fabricated: (i) flexible with open cells, stress and?tensile properties, e.g., furniture or bedding, and (ii) rigid with closed cells, low?thermal conductivity, low density and high dimensional stability mainly for?thermal insulation, e.g., building industries. The formulation step significantly influences the microstructure or morphology of these cellular materials and impacts the final foam properties. Even if some partially biobased compounds (polyols) can be used, commercial PU cellular materials are till now mainly based on fossil resources. However, future materials will combine high performance with low environmental impact in order to fulfill societal expectations. In this way, new biobased compounds combining different fields such as biotech, chemistry, science and materials engineering are more and more used in complex formulations for renewable foams, leading to specific renewable macromolecular architectures.

服务人员 尚玮姣

服务院士 宋湛谦

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