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| 1 | THE STUDY OF MODIFIED TALC POWDER ON FILLER RETENTION IN PAPERMAKING显示文摘This paper reports the study of modified filler grade talc powder on filler retention. Al2O3·3H2O alone or Al2O3·3H2O and P2O5 in combination have been used to modify talc powder. It is concluded that the optimum retention effect of talc can be achieved by covering it with 5% Al2O3·3H2O. Adding 30% filler, the retention from 2.5% P2O5, 2.5% Al2O3·3H2O covered talc powder is higher than that of 5% Al2O3·3H2O covered talc powder, which are 29.76% and 11.35% higher than that of the unmodified talc powder respectively. | HaitaoZhang YunzhanZhang RunanYang | 2004 | 天津科技大学学报2004，19，A01： | 4 |
| 2 | HYDROLYSIS OF PAPER-DISHWARE WASTES BY CELLULASE显示文摘The optimum conditions of hydrolysis of cellulosic wastes by cellulase were studied. The results show that the optimum conditions of sulfuric acid pretreatment were sulfuric acid consistency 0.3M,pretreatment temperature 100℃, pretreatment time 4hours. After sulfuric acid pretreatment, the optimum conditions of hydrolysis by cellulase were enzymatic temperature 50℃,enzymatic time 48hours,pH4.8,the charge of cellulase 100IU/g and the substraste consistency 60g/l. Meanwhile this paper studies that the structural change of cellulose during sulfuric acid pretreatment and cellulase hydrolysis by analyzing the infrared spectra. | JieLu ShulanShi RunanYang FuzhengLiang | 2004 | 天津科技大学学报2004，19，A02： | 0 |
| 3 | INFLUENCES OF BLAECHING ADDITIVES ON REED PULP FAST BLEACHING显示文摘The influences of bleaching additives on hypochlorite single-stage high temperature fast bleaching of neutral-sulfite reed pulp were studied. The influencing factors of bleaching velocity and result were as follows: the order and time of adding imide type additives, additives dosage, the dosage of NaOH and MgO used as buffer to turn up pH. | YanjunTang BingyueLiu RunanYang ZhengLu | 2004 | 天津科技大学学报2004，19，A01： | 0 |
| 4 | THE OXYGEN-ALKALI BLEACHING OF THE STRAW PULP显示文摘The influences on the brightness, viscosity and Kappa of the straw pulp under the different oxygen-alkali bleaching conditions have been studied in this paper. | LijuanWang RunanYang ZhonghaiLiu | 2004 | 天津科技大学学报2004，19，A01： | 0 |
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