Corn grafting starch and preparation method thereof

Abstract

The invention discloses a corn grafting starch and a preparation method thereof. The starch is prepared from the following raw materials in parts by mass: 100 parts of native corn starch, 20-25 parts of acroleic acid, 41-50 parts of butyl methacrylate, 2-8 parts of potassium persulfate, 0.01-0.02 part of dimethyl sulfoxide and 1000 parts of tap water. The preparation method comprises the following steps: (1) native starch pregelatinization; (2) grafting reaction: adding the acroleic acid and the butyl methacrylate into the starch after pregelatinization, uniformly stirring in a reaction kettle, adding the dimethyl sulfoxide and the potassium persulfate, uniformly stirring, filling into a ceramic reaction kettle, and putting the ceramic reaction kettle in a microwave oven field to carry out the graft copolymerization under the microwave power of 160-180 W, wherein the microwave radiation is carried out in an intermittent way; and after the radiation is carried out for 3.5-4.0 minutes each time, taking the ceramic reaction kettle out and stirring for 2-3 minutes, and carrying out the radiation for 4-5 times and the stirring for 3-4 times, thereby completing the grafting reaction; and (3) separating the polymers to obtain the corn grafting starch.

Description

technical field [0001] The invention relates to starch size technology for textile, in particular to a corn grafted starch prepared in a microwave field and a preparation method thereof. Background technique [0002] PVA has the advantages of good film-forming property and strong size film, and has occupied an irreplaceable position in the size formulation of polyester / cotton high-count yarn for a long time. The use of PVA size in the sizing size formula is not only expensive, but also has many disadvantages: from the perspective of technology, the cohesion of PVA size is large, and it is easy to produce secondary hairiness in dry splitting. Easy to skin, and in the process of starting up and starting the machine, due to the unstable temperature and air pressure of the slurry tank, the phenomenon of slurry skinning is also very prominent; from an ecological point of view, industrial wastewater containing PVA slurry is difficult to degrade, and the treatment cost is high , e...

AI Technical Summary

Problems solved by technology

The use of PVA size in the sizing size formula is not only expensive, but also has many disadvantages: from the perspective of technology, the cohesion of PVA size is large, and it is easy to produce secondary hairiness in dry splitting. Easy to skin, and in the process of starting up and starting the machine, due to the unstable temperature and air pressure of the slurry tank, the phenomenon of slurry skinning is also very prominent; from an ecological point of view, industrial wastewater containing PVA slurry is difficult to degrade, and the treatment cost is high , energy consumption is large, which brings great pressure on energy conservation and emission reduction; from the perspective of international trade environment, green trade barriers adopted by foreign countries for Chinese textiles are becoming more and more strict, which brings great pressure to the export of Chinese textiles and the survival of the textile industry. big pressure

However, when starch solid-phase grafting is used in a microwave field, the graft monomer volatilizes seriously during the reaction process, which not only causes a waste of raw materials, but also may cause fire or fire in large-scale production due to the flammability of organic monomers. explosion hazard

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