A Review on Bio-resins

Abstract

Bio-resins increases mechanical and structural properties of laminates and also used in systems where structural strength is important. It is made from several sources such as vegetable oils or blends, cashewnut shells, soybean, cotton seed, sugarcane and is cost effective and cause less pollution as it is not synthesized petro-chemically. Resin extraction is the main step in developing a bio-resin as this increases yield of the bio-resin. The solvents used for plant extract are ethanol, methanol, acetone, water chloroform, sulphuric acid, and Dimethyl Sulfoxide (DMSO). Adhesiveness of the bio-resin is increased by utilizing complex polymerization and crosslinking reactions. Graft co-polymerization processes are also used to increase adhesiveness. The key component for a bio-resin development is starch, lignin, flavonoids, that are fibrous in nature. This review studies gives an overview of sources, preparation and the different characterization tests required for a bio-resin.