林产化学与工业2017，Vol.37Issue(3)：89-94,6.DOI:10.3969/j.issn.0253-2417.2017.03.012
纤维尺寸对漂白硫酸盐木浆悬浮液屈服应力的影响
Influence of Fiber Size on Yield Stress of Bleached Kraft Wood Pulp Fiber Suspension
摘要
Abstract
The influence of fiber size on the yield stresses of fiber suspensions was discussed in same ranges of mass fraction and crowding number with the bleached softwood and hardwood kraft pulp as raw materials,respectively.Then these two pulp suspensions were mixed with different mass ratio,and the relationships between the fiber size and the yield stress of the mixed suspension were analyzed.The results showed that the suspension of the softwood pulp showed high yield stress because of its large size on the same mass fraction range.And with the increase of fiber size,the multiplier term coefficient of the power law relationship between the yield stress and the mass fraction increased,but the corresponding exponential term coefficient decreased.The yield stress cannot be expressed by the function only with the crowding number,and it is inverse proportional to the exponential function of the shape factor as the formula,τy ≈ 0.003 · N2.2/β0.6 Therefore,in the same crowding number range,the suspension of the hardwood pulp with the low shape factor showed the high yield stress.The values of the shape factors' power with the constant exponent followed the linear rule as the formula,β1.6AB ≈ β1.6B + (β1.6A-1.6B)/100 · x,so the yield stresses of the mixed pulps also presented the similar rule with the mixing ratio changed as the formula,τy(AB) ≈ τy(B) + (τy(A)-τy(B))/100 · x.关键词
漂白硫酸盐木浆/纤维悬浮液/屈服应力/集聚因子Key words
bleached kraft wood pulp/fiber suspension/yield stress/crowding number分类
化学化工引用本文复制引用
王晨,郑学梅,张辉,沙九龙,程金兰..纤维尺寸对漂白硫酸盐木浆悬浮液屈服应力的影响[J].林产化学与工业,2017,37(3):89-94,6.基金项目
江苏省高校优势学科建设工程(无编号) （无编号）
江苏省制浆造纸科学与技术重点实验室开放基金资助(201317) （201317）
