CAJ | 학술논문

对不同浓度、温度、打浆度、剪切速率对低浓杉木间伐材机械浆流变特性的影响进行了实验研究,并对不同因素引起浆料表观粘度变化的机理进行了分析.结果表明:浆料浓度、打浆度、温度及剪切速率都会对浆料的表观粘度产生影响.随着浆料浓度的增加,浆料表观粘度呈指数式增加;随温度的升高,浆料表观粘度则缓慢下降;打浆度影响浆料的微观结构,随着打浆度的升高,纸浆的表观粘度呈下降趋势;低浓纸浆的表观粘度则随剪切速率提高而递减.在实验测量范围内,杉木间伐材低浓纸浆为满足幂律关系的非牛顿流体,拟合的本构方程的流变特性指数n《1,因此其在测量范围内为假塑性流体.低浓纸浆流变特性的研究纸浆模塑生产线流送系统设计提供了依据.
대불동농도、온도、타장도、전절속솔대저농삼목간벌재궤계장류변특성적영향진행료실험연구,병대불동인소인기장료표관점도변화적궤리진행료분석.결과표명:장료농도、타장도、온도급전절속솔도회대장료적표관점도산생영향.수착장료농도적증가,장료표관점도정지수식증가;수온도적승고,장료표관점도칙완만하강;타장도영향장료적미관결구,수착타장도적승고,지장적표관점도정하강추세;저농지장적표관점도칙수전절속솔제고이체감.재실험측량범위내,삼목간벌재저농지장위만족멱률관계적비우돈류체,의합적본구방정적류변특성지수n《1,인차기재측량범위내위가소성류체.저농지장류변특성적연구지장모소생산선류송계통설계제공료의거.
The rheological behavior of low consistency thermomechanical pulp of Chinese fir harvested by intermediate thinning was analyzed. The results show that the apparent viscosity of pulp changed along with the beating degree, pulp consistency and shearing velocity. With the increasing of pulp consistency, the apparent viscosity of pulp increased gradually. Beating degree of pulp had an effect on microstructure of pulp. The apparent viscosity of pulp declined as beating degree of pulp increased, and the apparent viscosity of pulp fell along with the shearing velocity increasing. Based on the results, the rheological models are set up. The models showed that the fluid types of the low consistency pulp could be described as pseudoplastics fluids (non-Newtonian fluids).