The aim is to get new information about the main energy consumption in where of refined poplar APMP fiber with CMC pretreatment. In this paper, PFI refining trials on 1% and 2% CMC-pretreated poplar APMP were conducted using a comparable standard process. In this process, the standard energy consumption linearly increased with PFI revolutions, CMC pretreatment changed the linear relationship and a plateau of energy consumption was shown against PFI from 2500 rev and 3000 rev. Moreover, the refined fiber was analyzed by a Fiber Lab Analyzer Kajaani FS300. the conclusion on energy consumption was that the energy consumption was mainly used in fiber straighten within PFI rev. 1000; During PFI rev. from 1000 to 2750, the energy demand was mainly used in fines and vessel increase; PFI rev. from 2750 to 3000, the energy consumption was used for fiber coarseness increase and fiber kink index decrease.
Stearyltrimethyl ammonium bromide(STAB) was used for organic modification of bentonite and then ball milled the modified bentonite. The organically modified bentonite was analyzed by FT-IR and XRD. The results show that the stearyltrimethyl ammonium bromide has been interalated into the layers of bentonite. The layer distance of the bentonite is increased from 1.256nm to 2.694nm. The appropriate experimental conditions of interplanar spacing increasing were the dosage of STAB 40%, reaction time 4h, temperature 75°C. The ball milled organically modified bentonite was analyzed by SEM. The results show that the particle mainly reach submicron to nanometer when ball mill 2h. The particle size distribution range is from 100nm to 500nm. Ball milled organically modified bentonite/ cationic guar gum(CGG) can improve retention rate of paper-process reconstituted tobacco pulp obviously than organically modified bentonite/CGG because of smaller grains and better unigormity of ball milled bentonite.
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