鱼皮胶原纤维-淀粉复合膜的制备及性能研究

为明确鱼皮胶原纤维尺寸及其添加量对鱼皮胶原纤维-淀粉复合膜性能的影响,本研究利用醋酸预处理鱼皮(3、6、9、12 h)获得了不同尺寸的胶原纤维(CF3、CF6、CF9、CF12),考察了不同类型胶原纤维及其添加量对共混膜性能的影响。采用傅里叶红外光谱技术、差示扫描量热法及扫描电子显微镜对复合膜进行结构表征。结果表明:添加鱼皮胶原纤维后,复合膜的断裂伸长率和水蒸气透过系数均增加,溶解性降低;当CF3和CF6添加量分别为7.5%和10%时能增强复合膜的抗拉强度,而且以10% CF6制备的复合膜抗拉强度性能最好,添加CF9和CF12时,复合膜的抗拉强度呈降低现象。对添加10% CF6制备的复合膜和纯淀粉膜进行表征,发现胶原纤维与淀粉相容性良好,在成膜过程中,胶原纤维交错在淀粉膜中,两者之间形成了氢键,但复合膜的热稳定性下降。

Preparation and Properties of Fish Skin Collagen Fiber-starch Composite Film

In order to clarify the effect of collagen fiber size and its concentration on the performance of fish skin collagen fiber-starch composite films,fish skin was pretreated by acetate(3,6,9,12 h)to obtain different types of collagen fibers(CF3,CF6,CF9,CF12)with different sizes. The properties of the blend films added with different types and amount of collagen fibers were investigated. Composite films were characterized by Fourier transform infrared spectroscopy,differential scanning calorimetry and scanning electron microscopy. The results showed that the elongation at break and WVP of the composite films increased and the solubility decreased after adding collagen fibers. The tensile strength increased with CF3 7.5% or CF6 10%. The composite films prepared by 10% CF6 had excellent tensile strength. When adding CF9 and CF12,the tensile strength of the composite film decreased. The composite film and pure starch film prepared by adding 10% CF6 were characterized. The results showed that collagen fibers had good compatibility with starch. Collagen fibers were interlaced in the starch film,and the hydrogen bond was formed between the collagen fibers and the starch granules. However,the thermal stability of the composite film was decreasd.