Abstract
The global energy crisis and overconsumption of non-renewable resources have depleted natural resources, climatic changes with global warming, and rise in sea level. The research on alternate sources and chemicals has resulted in the usage of green materials. These biomaterials are sustainable sources, biodegradable, and are abundant in nature. The replacement of petrochemicals with biopolymers has gained much importance in this aspect. Conventionally, polyvinyl alcohol is employed as a protective colloid in polyvinyl acetate adhesive. Polyvinyl alcohol has the limitation of petroleum origin, is replaced by biopolymers. Starch being a biopolymer, has gained interest in replacing polyvinyl alcohol as a stabilizer. Cellulose has a low cost, and the most abundant biomaterial finds application as a reinforcing agent in conventional adhesives. Exploring cellulose as a stabilizer for polyvinyl acetate emulsion polymerization with reinforcement has created potential applicability of cellulose in adhesives. Surface hydroxyl groups in cellulose act as sites for functionalization, making it material for the adhesive sector. This review paper aims to showcase biomaterials, namely starch, and cellulose, in the adhesive field. A detailed review of cellulose as functional filler for polyvinyl acetate emulsion adhesives has been explained.
Highlights
The adhesives industry is one of the most important applications for poly (PVAc) emulsions, especially for wood product manufacture
Polyvinyl alcohol is employed as a protective colloid in polyvinyl acetate adhesive
1) Polyvinyl alcohol stabilized polyvinyl acetate emulsion Water-soluble polymers have attracted coating industries and adhesive market as the demand for solvent-free adhesives increased, which have the advantage of the absence of volatile organic compounds (VOC)
Summary
The adhesives industry is one of the most important applications for poly (vinyl acetate) (PVAc) emulsions, especially for wood product manufacture It has many advantages as an adhesive, e.g., low cost, ease of use, and simplicity of ap-. 1) Polyvinyl alcohol stabilized polyvinyl acetate emulsion Water-soluble polymers have attracted coating industries and adhesive market as the demand for solvent-free adhesives increased, which have the advantage of the absence of volatile organic compounds (VOC). In this view polyvinyl alcohol (PVA) is highly important in developing organic solvent free adhesives. Improvements in thermal stability with bonding strength and water resistance are shown by graft polymerization of vinyl acetate on corn starch [47]
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