摘要
通过机械活化法对淀粉和ε-聚赖氨酸的混合物进行球磨处理得到球磨共混物,利用扫描电子显微镜(SEM)、X-射线衍射仪(XRD)、差示扫描量热仪(DSC)、红外光谱仪(FTIR)等对其晶体结构、颗粒形貌、热特性和化学结构进行表征,并初步探讨了它对草鱼的涂膜保鲜效果.结果表明:在机械活化过程中,淀粉和ε-聚赖氨酸的晶体结构和颗粒形貌发生变化、粒径减小、结晶度下降、糊化温度降低,但是其化学结构没有改变.(4±1)℃条件下对草鱼鱼肉进行涂膜处理,结果表明:球磨共混物涂膜处理组的挥发性盐基氮(TVB-N)和丙二醛(TBA)含量显著低于物理混合物涂膜处理组,可减缓pH的变化,并可使菌落总数指标在10d之内不超过5(lg CFU/g).这些结果表明,机械活化法制备抑菌膜材料在保鲜方面有潜在的应用价值.
At the solvent-free and external agents L-lysine （NSP） was mechanically treated by the -free condition, the mixture of starch and ^-Poly- technology of mechanical activation method with a ball mill, and the product was named MASP. The effect of ball milling treatment on the morphology, crystal structure and molecular groups of starch was explored by scanning electron microscopy （SEM）, X-Ray diffraction （XRD）, differential scanning calorimetry （DSC） and fourier transform infrared spectroscopy （FTIR）. The films of MASP were covered on grass carp. The preserving quality of grass carp during cold storage （4± 1） ℃ was assessed. The results indicated that during the preparation process, the particle morphology and crystallization of starch were destroyed, but the chemical structure of starch and a-Poly-L-lysine was almost not changed. The contents of volatile base nitrogen （TVB-N） and malondialdehyde （TBA） of the MASP coating treatment group were significantly lower than those of the NSP coating treatment group, slowed down the rate of change, meanwhile the total number of colonies didn＇t exceed 5 （lg CFU/g） within 10 days. These results indicated that the preparation of antibacterial coating materials by mechanical activation method has potential application value in preservation.
出处
《发酵科技通讯》
CAS
2017年第1期30-35,共6页
Bulletin of Fermentation Science and Technology
基金
浙江省自然科学基金资助项目(LY12H28007)
关键词
淀粉
Ε-聚赖氨酸
机械活化
性能表征
涂膜保鲜
starch
ε-Poly-L-lysine
mechanical activation
performance characterization
film coating preservation
