Processing and properties of rigid polyurethane foams based on bio-oils from microwave-assisted pyrolysis of corn stover  

作　　者：Jianping Wu Yuanhua Wang Yiqin Wan Hanwu Lei Fei Yu Yuhuan Liu Paul Chen Lirong Yang Roger Ruan 

机构地区：[1]Center for Biorefining and Department of Bioproducts and Biosystems Engineering,University of Minnesota,1390 Eckles Ave.,St.Paul,MN 55108,USA [2]College of Material Science and Chemical Engineering,Zhejiang University,Hangzhou 310027,China [3]Du Pont Agricultural Chemicals Ltd.,Shanghai 3055 Pudong Beilu,Shanghai 200137,China [4]MOE Biomass Engineering Center and State Key Laboratory of Food Science and Technology,Nanchang University,Nanchang 330047,China [5]Department of Agricultural and Biosystems Engineering,South Dakota State University,Brookings,SD 57007,USA [6]Department of Forest Products,Mississippi State University,Box 9820,Mississippi State,MS 39762,USA

出　　处：《International Journal of Agricultural and Biological Engineering》2009年第1期40-50,共11页国际农业与生物工程学报（英文）

基　　金：the Initiative for Renewable Energy and the Environment and Center for Biorefining at the University of Minnesota,Minnesota Environment and Natural Resources Trust Fund,US DOT/Sun Grant Initiative,and China Ministry of Education PCSIRT Program(IRT0540)。

摘　　要：A new kind of rigid polyurethane(PU)foam was synthesized from the oil phase of bio-oils from microwave-assisted pyrolysis of corn stover.The recipes for the PU foams consisted of polyol-rich bio-oils,water as blowing agent,polyethylene glycol(PEG)as both polyol donor and plasticizer,diphenylmethane-4,4’-diisocyanate(polymeric MDI)as cross-linking agent,silicon-based surfactant,and tin-based catalyst.The mechanical properties of rigid foams were measured with universal testing machine(Instron4206).The effects of individual ingredients on the physical and mechanical properties of the foams were studied.It was found that water content,bio-oil content,and isocyanate dosage were important variables in making PU foams in terms of mechanical strength,density,and cellular structure Under optimal conditions,the compression strength of the prepared PU foams reached 1130 kPa with a density of 152.9 g/L.The results show that bio-oils are potential renewable polyol sources for making rigid PU foams.

关 键 词：rigid polyurethane foam PU BIO-OIL microwave pyrolysis corn stover physical properties 

分 类 号：O63[理学—高分子化学]