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Surface Treatment | Sunstrand Sustainable Materials

Surface Treatment

Surface treatments are a vital step in ensuring our material is compatible with a wide range of composite formulations Natural fibers are derived from plants which are rich in lignin and cellulose. For the fibers to be used as a drop-in replacement for traditionally used glass fibers, they must undergo several types of mechanical and/or chemical processes to be compatible with polymer matrix. The most common and usually the first step is delignification process in which the outer high molecular weight lignin is stripped using chemical process similar to the Kraft pulp process. After delignification, the remaining cellulosic content is exposed on the surface. Cellulose is a macropolymer consisting of linear chain of several D-Glucose molecules. It is a hydrophilic constituent of cell walls of green plants. It is the ability of these chains to hydrogen-bond together (intramolecular) and to water (intermolecular) that gives cellulose its unique fibrous properties, mechanical strength, and chemical stability.