Vipin K. Chawla , Ranjana Yadav , C. N. Pandey , R. K. Jain , A. K. Dixit

Abstract

Lignin-phenol-formaldehyde (LPF) resins were produced by substituting phenol with rice straw lignin in various percentages. Wood adhesive is certainly the most widely explored avenue of lignin utilization. Phenol was replaced by various percentages of lignin to keep the phenolic to formalin weight ratio constant to 1:1.8. 10%, 20% and 30% replacement of phenol by lignin were adopted in making lignin phenol formaldehyde resin (LPF Resin). The plywood panels of 4 mm thick, 30 × 30cm were made and the panels were subjected to test as per IS: 848:2006, specification for synthetic resin adhesives for plywood (Phenolic and Amino plastics). The results indicated that rice straw lignin was a feasible replacement for up to 30% of the phenol in PF resins.

Keywords

Rice Straw Lignin, Adhesive, Plywood

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Ranjana Yadav ¹

Affiliations
1 Department of Chemistry, IPIRTI Centre Mohali, IN

Abstract

The aim of this work was to develop a Modified Phenol-formaldehyde (PF) resin by partially replacing phenol with starch. Starch-phenol-formaldehyde (SPF) resins were produced by substituting phenol with starch in various percentages. Phenol was replaced by various percentages of starch to keep the phenolic to formalin weight ratio constant to 1:1.6. In the present study 10%, 20% and 30% replacement of phenol by starch were adopted in making SPF. The plywood panels of 4 mm thick, 30cm × 30cm were made and the panels were subjected to test for BWP grade as per IS: 848-2006, Specification of synthetic resin and adhesive for plywood (phenolic and amino plastic resin). The results indicated that the starch was a feasible replacement for up to 30% of the phenol in PF resins for poplar and silver oak species.

Keywords

Starch, Knife Test, Adhesive, Plywood.

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