Comparation with performance of bamboo fiber reinforced starch-based foams with different foamer

摘要

The foamed composites could be completely biodegradable which was mainly prepared by corn starch and PVA as matrixes,reinforced by bamboo fiber,separately foamed by water,NH4HCO3 and AC/ZnO,plasticized by the mixed plasticizer of glycerol/urea and other adjuvants using extrusion foaming method.They were respectively called as WPS,NPS,APS.Then,the foamed composites' apparent density,expansion ratio,water absorbtion,rebound rate,thermostability and cell morphology were discussed and compared with.The results showed that the apparent density decreased with increasing foamer content,then increasing; The apparent density of WPS,NPS and APS was respectively 0.24 g.cm-3,0.27 g.cm-3,0.15 g.cm-3; The expansion ratio increased with increasing foamer content,then decreasing; The expansion ratio of WPS,NPS and APS was respectively 63.8％,69.3％,75.4％; The water absorption increased with increasing foamer content,then decreasing; 1The water absorption of WPS,NPS and APS was respectively 71.3％,64.4％,73.4％; The rebound rate increased with increasing foamer content,then decreasing; The rebound rate of WPS,NPS and APS was respectively 54.3％,46.8％,58.3％; The thermostability of NPS was the best,and APS was the second,and WPS was the third.The number of cells was firstly increased with increasing foamer content,then decreasing and the side of cells became smaller with increasing content of foamer,then becoming larger.