Nur Hanani Z A, Roos Y H, Kerry J P
Department of Food Technology, Faculty of Food Science & Technology, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia.
School of Food and Nutritional Sciences, University College Cork, National University of Ireland, Cork, Ireland.
Int J Biol Macromol. 2014 Nov;71:94-102. doi: 10.1016/j.ijbiomac.2014.04.027. Epub 2014 Apr 24.
The manufacture and potential application of biodegradable films for food application has gained increased interest as alternatives to conventional food packaging polymers due to the sustainable nature associated with their availability, broad and abundant source range, compostability, environmentally-friendly image, compatibility with foodstuffs and food application, etc. Gelatin is one such material and is a unique and popularly used hydrocolloid by the food industry today due to its inherent characteristics, thereby potentially offering a wide range of further and unique industrial applications. Gelatin from different sources have different physical and chemical properties as they contain different amino acid contents which are responsible for the varying characteristics observed upon utilization in food systems and when being utilized more specifically, in the manufacture of films. Packaging films can be successfully produced from all gelatin sources and the behaviour and characteristics of gelatin-based films can be altered through the incorporation of other food ingredients to produce composite films possessing enhanced physical and mechanical properties. This review will present the current situation with respect to gelatin usage as a packaging source material and the challenges that remain in order to move the manufacture of gelatin-based films nearer to commercial reality.
由于可生物降解薄膜在食品应用中的可持续性，包括其来源广泛且丰富、可堆肥性、环保形象、与食品及食品应用的兼容性等，其作为传统食品包装聚合物的替代品，在食品应用中的制造和潜在应用已引起越来越多的关注。明胶就是这样一种材料，由于其固有特性，它是当今食品工业中一种独特且广泛使用的水胶体，因此可能具有广泛的进一步独特工业应用。不同来源的明胶具有不同的物理和化学性质，因为它们含有不同的氨基酸含量，这些氨基酸含量决定了在食品系统中使用时以及更具体地在薄膜制造中观察到的不同特性。所有明胶来源都可以成功生产包装薄膜，通过加入其他食品成分可以改变明胶基薄膜的行为和特性，以生产具有增强物理和机械性能的复合薄膜。本综述将介绍明胶作为包装原料的使用现状以及为使明胶基薄膜制造更接近商业现实仍存在的挑战。
