Study on DDSA Modified Guar Gum Used as the Retention and Drainage Did in Reconstituted Tobacco Pulp

Recently, reconstituted tobacco sheets (RTS) have played an increasingly significant role in treat and reuse tobacco waste in industry. In this paper, dodecenyl succinic anhydride (DDSA) and catalyst tetramethylammonium hydroxide (TMAH) was used to modify guar gum in ionic liquid 1-butyl-3-methylimidazolium chloride ([Bmin]Cl). The modified guar gum exhibited good retention and drainage properties in reconstituted tobacco pulp. The characterization analysis of the modified guar gum was performed using Fourier Transform infrared (FT-IR) spectroscopy. While keeping other factors the same, the effects of the shear rate, amounts of guar gum dodecenyl succinate and pH on the first-pass retention (FPR) of reconstituted tobacco pulp were evaluated. It was found that, the optimal shear rate condition is 500–750 r/min and the FPR of tobacco reconstituted pulp could reach the maximum improvement of 74% when the dosage of guar gum succinate (GGS) was 0.6 mg per g oven dry pulp. In addition, excellent retention performance could be observed between pH 7 and 8. The results of this study showed that the modified guar gum could be used as a useful retention and drainage aid in reconstituted tobacco pulp.