Preparation Of Feather Keratin Compound Film And Its Applications

With the development of social progress and technological, and people's growing environmental awareness, recycling materials have been caught much attention by the scientific community. The research of the recycling of synthetic polymers has been carried out, and some has been recycled. The recycling waste natural polymer would be to protect the human environment, and be important for achieving the all use of resources. That can not only reduce the cost of materials, but also ease the threat of depletion of oil resources to better alleviate the oppression of human beings on the environment. It contains a lot of feather keratin in Waste. Feather keratin has been attracted much attention because of its striking features, such as biodegradable, environmentally friendly, high nutritional value, nonpoisonous, readily available from an abundant renewable resource, and so on, and the substitution of conventional synthetic polymer materials with biopolymers. However, the feather keratin is major waste product currently in the poultry industry, causing an environmentally difficult disposal problem as it is not efficiently extracted and applied. The aim of this paper was to study that keratin take as additives in the biodegradable packaging application.Firstly, on the basis of introducing the research progress of the extracted methods of keratins and their applications in all aspects of life were reviewed; and the preparation of edible packaging films and their use were reviewed, and put forward the shortcomings of it.Secondly, the pretreatment with double alkyd-reduction method was used in this part. The red and white feather was used as raw material. Meanwhile, in order to study the diversity of feather colour and keratin structure, the extracted feather keratin was characterized using FT-IR Spectroscopy, Circular Dichroism (CD), MALDI–TOF MS, TG measurement, Elemental Analysis and Amino Acid Analysis.. These results suggested that increasing the feather colour caused an increase in keratin colour and keratin solution colour. The diversity may lie in the difference of amino acids containing the element of S (cystine). The more of cystine contained the darker of the colour of protein solution.Thirdly, the objective of this paper was to prepare compound films based on potato starch and RFK by a simple solvent casting method. The properties of film-forming solution were investigated. The optimized process and formula were obtained. The RFK/potato starch compound film (RFK/PSt-F) as a packaging film has good oil resistance. The study of the release of drug molecules for RFK/PSt-F that it as a carrier and a small molecule compounds RB as a model drug molecules. The results suggested that containing membrane showed a good performance of controlling release in buffer at different pH. The maximum emission of RFK/PSt-F was by 85% in acidic conditions. The maximum emission of PSt-F was by 80% in alkaline conditions. This showed that the addition of keratin increasing the drug release of compound film.In finally, the objective of this paper was to prepare compound films based on SPI and RFK by a simple solvent casting method. The properties of film-forming solution were investigated. The optimized process and formula were obtained. The RFK/SPI compound film (RFK/SPI-F) as a packaging film has good oil resistance. The study of the release of drug molecules for RFK/SPI-F that it as a carrier and a small molecule compounds RB as a model drug molecules. The results suggested that containing membrane of SPI-F and RFK/SPI-F showed a good performance of controlling release in buffer at different pH. However, the RFK/SPI-F showed the slow release rate, which helped make full use of the drug absorbed.In short, the RFK/PSt-F and RFK/SPI-F which has good mechanical properties and biodegradability was pH-responsive and showed controllable drug-release behavior was used in the field of medicine.