CAJ | 학술논문

以甘油和尿素作为混合塑化剂、废纸浆为增强体,玉米淀粉、聚乙烯醇为基体,利用熔融共混法制备了废纸浆增强玉米淀粉复合材料。研究了混合增塑剂、废纸浆、水含量、氢氧化钠浓度对复合材料力学性能的影响。力学性能测试结果表明,甘油和尿素混合塑化剂对复合材料有反增塑作用,当甘油/尿素含量分别为10/20份时,拉伸强度最佳为10.26MPa;氢氧化钠浓度为4%时,复合材料综合力学性能最好;废纸浆对复合材料有增强作用,当含量为35份时,拉伸强度最佳为11.35MPa;随着含水率的增加,材料的拉伸强度降低,断裂伸长率先增加后降低;扫描电镜观察发现,甘油和尿素混合塑化剂能够增塑淀粉,很好的改善废纸浆和玉米淀粉之间的相容性。
이감유화뇨소작위혼합소화제、폐지장위증강체,옥미정분、취을희순위기체,이용용융공혼법제비료폐지장증강옥미정분복합재료。연구료혼합증소제、폐지장、수함량、경양화납농도대복합재료역학성능적영향。역학성능측시결과표명,감유화뇨소혼합소화제대복합재료유반증소작용,당감유/뇨소함량분별위10/20빈시,랍신강도최가위10.26MPa;경양화납농도위4%시,복합재료종합역학성능최호;폐지장대복합재료유증강작용,당함량위35빈시,랍신강도최가위11.35MPa;수착함수솔적증가,재료적랍신강도강저,단렬신장솔선증가후강저;소묘전경관찰발현,감유화뇨소혼합소화제능구증소정분,흔호적개선폐지장화옥미정분지간적상용성。
The waste paper pulp /cornstarch-based composites plasticized by a mixed plasticizer of glycerol and urea, strengthened by waste paper pulp were obtained from cornstarch and PVA by means of the melting pro- cessing method. The influence of mixed plasticizer content, NaOH concentration, waste paper pulp and water content in the mechanical properties of composites were studied. The results show that mixed plasticizer has an antiplastic effect on the composites. When the glycerol and urea content is respectivelyl5phr, mechanical prop- erties of composites could get a good performance. Waste paper pulp do improve the mechanical properties of composites, tensile strength of composites has the highest value when waste paper pulp content is 35phr. Ten- sile strength of composites is increased with the increasing water content, then it decreased. While, the behav- ior of elongation at break of composites is contrary. The SEM micrographs of the cornstarch granule, thermo- plastic cornstarch plasticized by the mixed plasticizer were observed. The results reveal that the mixed plastici- zer could plasticize the cornstarch and the compatibility between cornstarch and waste paper pulp is obviously improved.