Wheat gluten protein in the wa...
Wheat gluten protein is a kind of natural polymers, have good bonding and film properties. Wheat gluten protein in mainly for glutenin and gliadin, the two proteins unique amino acid composition gives gluten protein can form a viscoelastic network structure characteristic, is the other protein without); However the structure also led to in the water, not scattered to dissolve, greatly restricted its in the industry more widely. In order to make the wheat gluten dispersed in water to form the uniform system, must first the modification. Later, can add the appropriate pigments and fillers through the composition such as water preparation of interior wall coatings. This paper aims to study in wheat gluten protein dissolved in water (spread) method and its application in water-based paint of the wall inside.
Wheat gluten protein add can not only enhance the coating performance, and for wheat protein in the food industry application provides a train of thought.
1 wheat gluten preparation Take the quality of certain says flour with right amount water (about 2:1) fully knead, it into the dough, room temperature rest for 20 min, tap water flushing until the wash water carefully knead basic colorless so far, wet gluten to use.
2 the dissolution of the wheat gluten (spread)
2. 1 water dissolve Wheat wet gluten due to its special network structure is not easy to dissolve the scattered in aqueous solution, from room temperature water to nearly 100 ℃ of boiling water no matter how strong mixing, the dissolved or dispersed all is very limited, it cannot preparation into bond performance is good, system even adhesive. In fact, it was in a neutral aqueous solution wheat protein of this not solubility (and form a network structure of the ability), make its and the separation of starch becomes possible, this is industrialized production wheat starch gluten powder in the valley of the foundation.
2. 2 ethanol dissolve Using different concentrations of aqueous and wet gluten in various mixing ratio, in different temperature to stir dissolved, found that the best condition it can only make the one of the gliadin dissolve.
2. 3 alkali dissolve Reference rice protein extraction technology of alkali thoughts and the Stanford, ZhangYuLin test methods, the use of sodium hydroxide solution to dissolve the wet gluten. After many tests found that, in the right sodium hydroxide, water and wet gluten quality than, by agitation can make wet gluten fully dispersed, dissolved form even glue, but the problems are color yellow against preparation white paint.
2. 4 dispersant A dissolve Dispersant A can make wet gluten protein molecules together solution, destroy the original protein molecules of hydrogen bonds, and formed the new hydrogen bond. So, it's A quality than dispersant and wet gluten after mixer can be formed after the mixing and dispersing uniform, sticky glue, and glue colour and lustre is shallow, even light in wet gluten the original color, so can reduce prices expensive pigment especially the dosage of titanium dioxide, be helpful for coating preparation.
The wet gluten and not gluten to preparation coating, mainly is think of it; In addition, save by wet gluten production gluten need air drying, crushing a lot of energy consumption.