Enhancement of processability, surface, and mechanical properties of paper based on rice straw pulp using biopolymers for packaging applications

Abstract

Two biopolymers, chitosan and oxidized starch, were used as wet-end additives to improve the strength properties of the paper because of their biodegradable and non-hazardous qualities. The present study reports the improvement in surface and strength properties of packaging-grade paper made with rice straw pulp using biopolymers, chitosan, oxidized starch, and surface sizing added at the wet end of the paper machine. Use of chitosan at all doses from 0.5 to 10 kg/ton enhanced important surface and strength properties of paper. The breaking length, tear index, burst index, ring crush strength, stretch, tensile energy absorption index, and Taber stiffness of the paper with 10 kg/ton of chitosan as a wet-end additive showed 22%, 14%, 20%, 59%, 16%, 44%, and 48% improvement, respectively, in comparison to control, (i.e, without its addition). The Cobb60 was also reduced by 45%, showing better resistance to water in comparison to rice straw paper alone. The effects of chitosan added at the wet end on the paper surface were investigated using Fourier transform infrared spectroscopy (FTIR). The use of 10 kg/ton of chitosan at the wet end reduced the color and total suspended solids in the back water of the papermaking system by 55% and 51%, respectively. Further enhancement in the surface and strength properties of paper was observed following surface sizing with oxidized starch.

A Novel Starch‐Based Synergistic Flame Retardant for the Treatment of Insulating Paper

“…It was mainly because the flame retardant SPBD was attached to the surface of the fiber (subsequent SEM results would further confirm that SPBD was indeed attached to the surface of the fiber), which improved the ring crush strength. [ 60 ]…”

“…It was mainly because the flame retardant SPBD was attached to the surface of the fiber (subsequent SEM results would further confirm that SPBD was indeed attached to the surface of the fiber), which improved the ring crush strength. [60] 3.9. AC Breakdown Strength Figure 13 showed the influence of SPBD concentrations on the AC breakdown strength of FP.…”

Application of polysaccharide based modified ground calcium carbonate in wet‐end of papermaking

“…CH's cationic properties allow for strong interaction with anionic cellulosic fibers, and its interaction with fillers on the surface can enhance the bonding between the filler and cellulosic fibers, ultimately increasing retention. CH application in different processes of paper industry like wet‐end of papermaking, surface sizing, filler modification and paper coating was reported earlier 37,42,51–55 . CH was also found to be effective filler modifier in wet end of papermaking 11,28 .…”

“…CH application in different processes of paper industry like wet-end of papermaking, surface sizing, filler modification and paper coating was reported earlier. 37,42,[51][52][53][54][55] CH was also found to be effective filler modifier in wet end of papermaking. 11,28 Study was also carried out with Chitosan acetate (CH.A) films for Transdermal delivery of Propranolol Hydrochloride.…”

Eco-Friendly Rice Straw Paper Coated with Longan (Dimocarpus longan) Peel Extract as Bio-Based and Antibacterial Packaging

“…Although applications of rice straw cellulose and paper have been reported during recent years [ 15 , 16 ] there are few studies on the antibacterial activity of rice straw paper [ 17 ]. Therefore, we report herein the development of biobased and bioactive material by coating longan peel extract onto rice straw paper.…”