The Study Of The Protein Modified Viscose Fiber

Viscose fiber belongs to the regenerated cellulose fiber, as a result the viscose fiber has the same structure as the natural cellulose fiber, the clothing made by viscose is also softness, moisture absorption and moisture penetrability, and biodegradable. With the development of the society and the enhancement of environmental protection consciousness, people have a higher request for viscose fabrics such as skin care, comfortable, cost-effective.Ordinary viscose fiber can’t satisfy people’s needs, thus protein modified viscose fiber has become a trend. This fabric has soft cotton goods, also a sense of natural silks and drapability. So protein modified viscose fiber which has dual advantages exists broad market, developing the protein modified viscose fiber has great significance.Pupa protein is extracted from silkworm pupa, the by-product of sericulture, and the feather protein is extracted from the feathers of poultries. These two kinds of raw materials have wide sources and affordable prices. Viscose fiber is modified with protein which not only solves the burden on the environment due to the large accumulation of these materials, but also reduces the cost of protein fiber. So with this two kinds of protein modified cellulose, functional viscose fiber will become a new method.Currently, pupa protein fiber and feather protein fiber are produced through the blend spinning of the viscose spinning solution and the protein solution. There exist the following deficiencies in the preparation method of the blend spinning: Firstly, the addition of protein can change the normal spinning conditions of viscose fiber, so it is more difficult to control the spinning process; secondly, The mechanical properties of the protein viscose fiber produced by the blend spinning have large lower. thirdly,The process of spinning is complex and its cost is high. In order to solve these problems, this paper, through adopting the chemical crosslinking methods, respectively uses the double epoxy compound and organosilicone crosslinking agent to graft the protein to the viscose fiber. This protein modified viscose has the high protein content and functional wash fastness. This paper will have a systematic study of the modification conditions,and the products will be characterized and tested.The results show that the double epoxy compound as crosslinking agent by using one- step and two- step can get the pupa protein modified viscose fiber, one-step method for effective utilization is above two-step, and the process of one-step is simple and short time-consuming. The optimum reaction conditions of one-step: the concentration of the double epoxy crosslinking agent is 4.0%, the reaction temperature between the double epoxy crosslinking agent with the viscose fiber and protein solution is 140℃, the pupa protein concentration is 9.0%, Under these conditions, the protein content of viscose is2.38% and the utilization rate of protein is 26.44%. Compared with double epoxy compound, organosilicone crosslinking agent has better effect, the protein content and effective utilization of the modified fiber were significantly higher than double epoxy compound crosslinking agent. The optimum reaction conditions of organosilicone crosslinking agent: The hydrolysis time is 2 hour, the concentration of organosilicone is 1.6%, the reaction temperature between organosilicone and viscose fiber and protein solution is 135℃,the reaction time is 2 minutes, pupa protein concentration is 12.0%, feather protein concentration is 9.0%.Under these conditions, the pupa protein content of protein modified viscose is 7.41% and the utilization rate of protein is 61.75%; the feather protein content of protein modified viscose is 5.49% and the utilization rate of protein is 61.00%.In the orthogonal experiment of pupa protein, the most remarkable factor is reaction temperature; In the orthogonal experiment of feather protein, the most remarkable factor is reaction time. The results show that the protein modified viscose fiber has fairly good wash fastness, moisture permeability, air permeability, wet and dry strength, pilling resistance and UV protection properties.