酶解玉米秸秆残渣制备聚氨酯硬质泡沫  

Preparation of Polyurethane Rigid Foams Using Fermentation Residue of Corn Stalk

作　　者：张通 白富栋[1] 李政[1] 薛冬[1] 王领民[1] 乔凯[1] ZHANG Tong;BAI Fu-dong;LI Zheng;XUE Dong;WANG Ling-min;QIAO Kai(Fushun Research Institute of Petroleum and Petrochemicals,SINOPEC,Fushun 113001,Liaoning,China)

机构地区：[1]中国石油化工股份有限公司抚顺石油化工研究院

出　　处：《精细化工》2018年第9期1491-1495,共5页Fine Chemicals

基　　金：中国石油化工集团公司资助项目(SH1402;SH1601)~~

摘　　要：以制备纤维乙醇得到的酶解玉米秸秆残渣为原料，采用碱性乙醇法提取木质素，然后用聚乙二醇／甘油溶液将木质素进行液化得到木质素基多元醇，并以此液化产物代替部分聚醚多元醇用于聚氨酯泡沫的合成。结果表明：碱性乙醇法得到的木质素提取率为93．5％，木质素质量分数达到94．1％；在PEG-400／丙三醇液化体系中，木质素液化率高达99．5％，液化产物羟值为360mgKOH／g；在聚氨酯合成中，木质素液化溶液对聚醚多元醇的替代量可以达质量分数47％，所得聚氨酯泡沫产品的芯密度和压缩强度分别为48．6kg／m3和212kPa，满足工业聚氨酯硬泡的国家标准。Lignin was extracted from fermentation residue of corn stalk by alkaline-ethanol extraction method and then liquefied with polyethylene glycol/glycerol to produce lignin-based polyols for the preparation of rigid polyurethane foams. The results showed that lignin with a yield of 93.5% and a purity of 94.1% was obtained. When PEG-400/glycerol was used as liquefaction solvents, the liquefaction efficiency of lignin was as high as 99.5% and the hydroxyl number of liquefaction product was 360 mg KOH/g. For the preparation of polyurethane rigid foams, the polyether polyols could be replaced by the obtained liquefaction product, and the rate of substitution could reach 47% （mass fraction）. The core density and compression strength of prepared polyurethane foam were 48.6 kg/m3 and 212 kPa, which met the national standards of industrial polyurethane hard foam.

关 键 词：酶解残渣 木质素 聚醚多元醇 聚氨酯泡沫 功能材料 

分 类 号：TQ353.6[化学工程]