Biobased-interlayer glass composite with improved mechanical properties and ultraviolet radiation shielding

This paper reports a biobased-interlayer glass composite that augments the flexural strength and stiffness of glass and Ultraviolet protection. The benign interlayer consists of polyvinyl alcohol, lignin, and citric acid as a crosslinker. The interlayer was doctor bladed on soda-lime glass, encrusted by a second glass, dried, then heat-treated to warrant its strength and durability. Three-point bending tests disclosed an improvement in flexural strength (53.1%), flexural strain (43.1%), and flexural stiffness (9.4%) in contrast to the pristine glass. Furthermore, the laminated glass effectively shields broadband Ultraviolet radiation and concurrently displays outstanding transparency over 75% in the visible range. This research offers an innovative design approach for robust Ultraviolet shielding and strengthening of glass in a facile and cost-effective manner. Future applications of this novel composite include greenhouse cover, automobile windshields, security, and museum artwork.