Liquefaction of Peanut Shells with Cation Exchange Resin and Sulfuric Acid as Dual Catalyst for the Subsequent Synthesis of Rigid Polyurethane Foam

• DOI: 10.3390/polym11060993
• Publication Date: 2019-06-05T13:37:58Z
• Authors: Qinqin Zhang; Weisheng Chen; Guojuan Qu; Xiaoqi Lin; Dezhi Han; Xiaofei Yan; Heng Zhang
• Keywords: Hydroxyl value; Petrochemical; Depolymerization

The conversion of lignocellulosic biomass from renewable raw materials to high value-added fine chemicals expanded their application in biodegradable polymers synthesis, such as polyurethanes and phenolic resin, etc. In this work, the strong-acid cation exchange resin sulfuric acid dual catalyst offered an effective way catalyze liquefaction reaction peanut shells. properties liquefied products were characterized by means hydroxyl value, viscosity solubility tests, while shells residue analyzed ATR-FTIR, TG SEM techniques. results indicated that could be completely dissolved deionized water, methanol polyethylene glycol, respectively, they a preferable substitution petrochemical polyols soft segments synthesize rigid polyurethane foams. Moreover, cellulose hemicellulose easily decomposed into smaller molecules via breakage C-O bond besides five-membered hexatomic ring, lignin degraded chemical bonds β-O-4, 4-O-5 dibenzodioxocin units. fabricated (RPU) foam, containing higher percentage open pores with uniform size, can potentially utilized for flower mud sound-absorbing materials.