摘要
采用超声波对纳米SiO2进行分散,为探讨纳米SiO2的分散情况对大豆蛋白/PVA复合薄膜性能的影响,通过单因素试验和正交试验,对复合薄膜的性能进行了系统研究。试验结果表明:纳米SiO2的超声时间,超声温度和超声功率对复合薄膜的性能均有影响;当超声温度为45℃,超声功率为160W,超声时间为40min时得到的复合膜性能最佳,其中超声温度对薄膜的性能影响最大,其次是超声功率和超声时间;在最佳条件下,薄膜的抗张强度为9.33MPa,伸长率为76.13%,透光率为21.85%,吸水率为47.77%。
In order to investigate the effect of dispersibility of Si02 nanoparticle on the properties of SiO2 nanoparticles/soy protein/PVA film, the aqueous suspension of the SiO2 nanoparticles was obtained by the ul- trasonic technique and the filming property of the composite film was studied through single-factor experiments and orthogonal experiment. The results showed that there were significant effects on properties of the composite films under different ultrasonic time, ultrasonic temperature and ultrasonic power. And the optimum film-form- ing condition was ultrasonic treating for 40min at 45℃ and 160W, among which the most important factor was ultrasonic temperature, and sequentially followed by ultrasonic power and ultrasonic time. Then the tensile strength, breaking elongation, transmittance and water absorption were 9. 33MPa, 76. 13%, 21. 85% and 47.77 %, respectively.
出处
《包装与食品机械》
CAS
2015年第3期5-9,共5页
Packaging and Food Machinery
关键词
纳米SIO2
分散性
大豆蛋白
薄膜
性能
SiO2 nano-particles
agglomeration
soy protein
film
properties
