Changes of BCTMP Fibers and Handsheets Properties by the Treatment of LB DES at Different Molar Ratios

Abstract

This study was conducted to investigate the effects of deep eutectic solvent (DES) treatment on BCTMP fibers and handsheets properties. DES was prepared using lactic acid and betaine (LB), and the molar ratio of these two components mixtures was controlled to 2:1 (LB 2:1) and 5:1 (LB 5:1). As results, 2% of BCTMP pulp (o.d. weight) was extracted when it was treated by LB 5:1 at 50℃ for 12 hours, stirring constantly at 120 rpm. In contrast, lignin was not extracted when BCTMP was mildly treated by the LB DES mixed with 50% of distilled water at the reacting condition of temperature 60℃ for 2 hours using water bath. These results indicate that conditioned water content and adequate reaction time are needed to achieve effective extraction of lignin. It was also found that stiffening of cellulose fiber due to the mild treatment of LB DES to BCTMP fiber leads to the increase of paper bulk without the loss of strength.

Deep eutectic solvent pulping from sorghum stalks

“…Choi et al (2016a) reported that the bulk of TMP handsheets decreased with DES treatment. Another study (Choi et al 2016b) noted that the bulk of BCTMP and BKP handsheets increased with DES treatment.…”

“…Choi et al (2016a) investigated the effects of DES (lactic acid and betaine) treatment on the properties of thermomechanical pulp (TMP) fibers and their handsheets. In another study (Choi et al 2016b), they investigated the effects of DES (lactic acid and betaine) treatment on bleached chemi-thermomechanical pulp (BCTMP) and bleached kraft pulp (BKP) fibers and their handsheets properties. Majová et al (2017) described the effect of DES on the delignification of hardwood kraft pulps having different lignin contents.…”

Effect of ternary deep eutectic solvents on delignification of stone pine cone

“…The rising importance of DES can be observed from the increasing publication number in the last decade from the Web of Science (2023) (Figure 1). During the last decade, DESs have been extensively studied in biomass fractionation (Li et al, 2017;Pan et al, 2017;Xu et al, 2018;Lyu et al, 2018;Kwon et al, 2020;Yan et al, 2023) and pulping (Choi et al, 2016a;2016b;Smink et al, 2019;Gülsoy et al, 2022a;2022b;Gülsoy, 2023).…”