By Richard Wool, X. Susan Sun
Bio-Based Polymers and Composites is the 1st booklet systematically describing the golf green engineering, chemistry and manufacture of biobased polymers and composites derived from crops. This publication supplies an intensive advent to bio-based fabric assets, availability, sustainability, biobased polymer formation, extraction and refining applied sciences, and the necessity for built-in learn and multi-disciplinary operating groups. It offers an in-depth description of adhesives, resins, plastics, and composites derived from plant oils, proteins, starches, and traditional fibers by way of constructions, homes, production, and product functionality. this is often a very good booklet for scientists, engineers, graduate scholars and commercial researchers within the box of bio-based fabrics.
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Extra info for Bio-Based Polymers and Composites
The starch can be purified by passing the starch slurry through a series of cyclonettes, as described for corn starch washing. The protein matrix, after starch washing, is in skeleton form and dewatered. The dewatered protein matrix has a strong viscoelastic property like rubber and is ready for further processing. Starch from other grains, such as rice, is usually produced for special uses because of specific properties, such as small granule size, special gelatinization and rheological behaviors, and other properties.
Particle sizes for grits range from 10 to 80 mesh, and from 100 mesh and above for soy flour. Soy protein concentrates, containing about 70% protein, can be obtained by removing soluble carbohydrate components.
Corn is the most popular raw material for starch processing because the starch yield from sorghum is low due to grain structure issues. First, the protein matrix in sorghum is tightly attached to the starch granules. The steeping process used for corn steeping cannot completely disperse the protein matrix, which results in a low starch recovery. In fact, this is also the reason for low recovery of products related to bioconversion processes. Second, the germ of a sorghum kernel is very small compared to the corn germ, which makes it very difficult to separate it from the sorghum kernel without causing damage.