杨梅单宁泡沫的制备工艺研究

Study on preparation process of bayberry tannin foam

研究利用化学方法分析了杨梅单宁的主要结构,并利用杨梅单宁和糠醇等生物质原料来制备单宁泡沫塑料。系统对泡沫的表观密度、粉化程度、吸水率、压缩性能、阻燃性能和泡孔形态进行表征。研究得出,在该工艺下制备的泡沫,孔径和形态均匀分布,密度可控,最大压缩强度为0.23MPa,氧指数为34.71%,属于难燃材料;24h吸水率高达842.07%,有在鲜花保湿领域应用的巨大潜力。

In this work,the bayberry tannin was analyzed using conventional chemical structure methods,and then this tannin was used to mix the furfuryl alcohol and other additives to prepare tannin foams.The apparent density,powdering degree,water absorption,compression strength,flame retardancy and foam cell morphology of these foams were characterized.The obtained results revealed that the as-prepared tannin foams are uniformly distributed in pore size and morphology with a controllable density.The highest compressive strength of the foam is 0.23 MPa parallel to the foam rising direction.As a flame-retardant material,the foam’s oxygen index is 34.71%.The 24 h water absorption rate is as high as 842.07%.Thus,the foam has a great potential in the field of flowers moisturizer.