Pretreatment to improve adsorption and effectiveness of wet end chemicals for a bleached chemithermomechanical pulp
Source abstract
Abstract
Bleached chemithermomechanical pulp (BCTMP) contains high amounts of anionic trashes that can seriously reduce the efficiency of many wet end functional and process chemicals. Fixing agents have been used to offset this negative effect, with varying success. In this study, we used a specially designed, starch-based fixing agent, namely, a low molecular weight, highly cationic starch (LHCS) to pretreat a BCTMP. We used ultraviolet (UV)-visible spectroscopic methods to investigate the effectiveness of LHCS use on the adsorption of some typical wet end chemicals, such as fluorescent whitening agent, tinting dye, wet strengthening agent, dry strengthening agent, neutral sizing agent, and retention agent onto the BCTMP. The results show that the adsorbed amounts and the adsorption efficiencies of these chemicals can be improved by LHCS pretreatment, variously resulting in higher brightness, better tinting, higher wet and dry strengths, better sizing, and higher retention and drainage.
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Research context
OpenAlex topics: Lignin and Wood Chemistry · Advanced Cellulose Research Studies · Pickering emulsions and particle stabilization
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (30)
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