Valorization of Corn Husk Waste for Textile Applications

Agriculture biomass is a widely known renewable source that has a high possibility of recycling. The present investigation deals with the extraction, pre-treatment, dyeing, and characterization of natural fiber obtained from agricultural residues of corn husk. Water retted corn husk fibers were subjected to two steps of scouring and bleaching with hydrogen peroxide. The process effectively reduced non-cellulosic impurities, increased cellulose content to almost 79%, enhanced water absorption (431.5%), and increased fiber whiteness (54) with minimal impact on breaking tenacity (17.17 CN/tex). Natural dyeing was performed by using dye extracted from Sappan wood, and it was observed that fiber dyed without mordant exhibits a good color strength (K/S) of 13.21. Optimum dyeing conditions were determined by the response surface methodology, where K/S was kept as the main response. Modern spectroscopic characterization techniques were used for confirmatory analysis. The optimized recipe for natural dyeing is a 20% liquid dye concentration at 70 degrees C for 1 hour, which achieved a K/S of 10.2-10.5 with adequate wash and light fastness properties in the range of 3-4 and 7-8, respectively. The current study will pave the way for the efficient textile application of this abundant but unnecessarily wasted biomass.