Enhanced mechanical and hydrophobic properties of composite cassava starch films with stearic acid modified MCC (microcrystalline cellulose)/NCC (nanocellulose) as strength agent

编号 020021904

推送时间 20191230

研究领域 林产化工 

年份 2019 

类型 期刊 

语种 英语

标题 Enhanced mechanical and hydrophobic properties of composite cassava starch films with stearic acid modified MCC (microcrystalline cellulose)/NCC (nanocellulose) as strength agent

来源期刊 International Journal of Biological Macromolecules

期 第219期

发表时间 20191014

关键词 Microcrystalline cellulose;  Nanocellulose;  Stearic acid modification;  Cassava starch film;  Hydrophobicity;  Mechanical properties; 

摘要 The green composite cassava starch films were prepared using stearic acid modified microcrystalline cellulose (M-MCC)/nanocellulose (M-NCC) as strength agent, which shows good mechanical and hydrophobic properties and is a candidate for food package in this work. Microcrystalline cellulose (MCC) was prepared with 98% phosphoric acid hydrolysis and mechanical stirring at 600?r/min and nanocellulose (NCC) was prepared with 65% sulfuric acid hydrolysis. After using stearic acid to modify MCC and NCC, the casting method was used to prepare the M-MCC/cassava starch composite films and M-NCC/cassava starch films. Physical, mechanical, hydrophobic and thermal properties were characterized using SEM, electronic universal testing machine, contact angle meter and TGA. The results showed that: M-MCC and M-NCC can lead to the enhancement of mechanical and hydrophobic properties of composite films; 0.5% M-MCC and 1.5% M-NCC had the highest enhancement effect on mechanical properties, leading the tensile strength of cassava starch film increased by 484.5% and 327.7% respectively; As to hydrophobic property, when 2% M-MCC and 0.5% M-NCC added, the hydrophobicity of the film increased by 65.0% and 30.3% respectively. Overall, the enhancement effect of M-MCC was better than M-NCC. But when M-MCC/M-NCC was added, the thermal stability of films reduced.

服务人员 尚玮姣

PDF文件 浏览全文