Comparison of the internal functionalization and surface modification methods of chemi-mechanical pulp handsheets using nanocellulose, chitosan, and DTPA

The optical and mechanical properties of paper sheets were compared following treatment with biopolymers using two different methods, i.e., internal functionalization surface modification. Industrial chemi-mechanical pulp was provided, groups handsheets made. first group sheet samples prepared incorporated chitosan in a mixed-in-pulp slurry (at three levels, 0%, 1%, 2%), the second group, untreated spray-coated either 2% chitosan, nanocellulose, 0.5% DTPA, or mixed solution (0.5% DTPA + nanocellulose). Then, analyzed. brightness, opacity, greenness/redness measured spectrophotometrically CIELab system. Additional paper, water absorption, air permeability, tear, tensile, burst resistance, treated also measured. results indicated that treatments had considerable effect on relative parameters, which resulted an increase properties, especially when nano-particles applied to mixed-in-slurry process. Inversely, from spray-coating method better for specifications.