Combined effect of cassava starch nanoparticles and protein isolate in properties of starch‐based nanocomposite films

Abstract

This study aimed to evaluate the effects of incorporation of cowpea protein isolate and cassava starch nanoparticles obtained by ultrasound on the properties of cassava starch:glycerol films. The cowpea bean protein isolate was successfully obtained with 72.5% of protein and solubility about 90%. The cassava starch nanoparticles yielded 97.85%. Increasing protein isolate concentration in starch:glycerol films resulted in a progressive reduction of water vapor permeability up to 27.0%. The cassava starch nanoparticles added films presented expressive increments in tensile strength (283.83%) as well as modulus of elasticity (204.31%), accompanied by decreasing in elongation at break (24.28%). The thermal stabilities of cassava starch films were affected by the addition of both protein isolate and cassava starch nanoparticles. The cassava starch nanoparticles obtained by ultrasound ensured the maintenance of film properties, optimizing the production time, with a higher yield, and without the need for chemical reagents. Thus, it could be useful for substitution of those obtained by acid hydrolysis. Therefore, giving rise to a trend of production of nanocomposite films suitable for reinforced packaging applications.

Structural and Physicomechanical Properties of an Active Film Based on Potato Starch, Silver Nanoparticles, and Rose Apple (Syzygium samarangense) Extract

“…The FTIR outcomes were similar for both PS films with and without AgNP solution which shows that the chemical structure of the PS did not vary by the addition of AgNP solution. Changes in the peak intensity of PS-based films could be due to physical interactions in hydrogen bonding or van der Waals force among AgNP solution and the PS matrix [46].…”

Research progress of starch from characteristic tropical crops

“…木薯淀粉制作薄膜的制作方法主要有流延法 [234] 、热熔 挤出法 [235] 、溶剂浇铸法 [236] 和溶剂置换法 [237] , 所用原料的相关技术主要有共混技术和淀粉改性技术. 混合 材料主要包括纤维类(如木薯渣 [236,238] 、蓝莓渣 [239] 、南瓜皮 [240] 、羧甲基纤维素 [241] 、纳米纤维素 [234,242] 等)、 天然橡胶 [243] 、蛋白类(发酵乳清 [244] 、明胶 [245,246] 、玉米醇溶蛋白 [247] 、燕麦麸 [240] 等)、土类(如蒙脱土 [248] 、 膨润土 [249] 、纳米粘土 [250] 等)、精油类 [251,252] 、多酚 [253,254] 、多糖 [235,246,251] 、纳米粒子 [255][256][257] 和离子液体 [258] 等; 淀粉改性主要涉及化学改性和物理改性, 如交联改性 [259] 、氧化改性 [260] 、酯化改性 [259] 、预糊化 [261] 、辐 照改性 [262,263] 、超声改性 [264] 等. 目前, 木薯淀粉膜也在向智能化发展, 如 pH 响应型膜 [257,265] 的开发.…”