纤维尺寸对漂白硫酸盐木浆悬浮液屈服应力的影响

doi:10.3969/j.issn.0253-2417.2017.03.012

林产化学与工业 ›› 2017, Vol. 37 ›› Issue (3): 89-94.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

王晨^1,2, 郑学梅^1,2, 张辉^1,2, 沙九龙^1,2, 程金兰^1,2

1. 南京林业大学江苏省制浆造纸科学与技术重点实验室, 江苏南京 210037;
2. 南京林业大学江苏省林业资源高效加工利用协同创新中心, 江苏南京 210037

收稿日期:2016-05-13 出版日期:2017-06-25 发布日期:2017-07-03
通讯作者: 张辉(1962-),男,江苏启东人,教授,博士,主要从事制浆造纸装备研究;E-mail:zhnjfu@163.com E-mail:zhnjfu@163.com
作者简介:王晨(1981-),男,江苏南京人,讲师,博士,主要从事制浆造纸装备研究;E-mail:chenwang8102@163.com
基金资助:
江苏省高校优势学科建设工程（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）

Influence of Fiber Size on Yield Stress of Bleached Kraft Wood Pulp Fiber Suspension

WANG Chen^1,2, ZHENG Xuemei^1,2, ZHANG Hui^1,2, SHA Jiulong^1,2, CHENG Jinlan^1,2

1. Jiangsu Provincial Key Lab of Pulp and Paper Science and Technology, Nanjing Forestry University, Nanjing 210037, China;
2. Jiangsu Co-Innovation Center for Efficient Processing and Utilization of Forest Resources, Nanjing Forestry University, Nanjing 210037, China

Received:2016-05-13 Online:2017-06-25 Published:2017-07-03

摘要/Abstract

摘要： 以漂白硫酸盐针叶木和阔叶木两种浆板为原料，在相同质量分数和集聚因子的条件下，考察了单一浆料的纤维尺寸对其纤维悬浮液屈服应力的影响，并进一步将两种浆料按不同质量比例混合，分析了纤维尺寸对混合浆料纤维悬浮液屈服应力的影响。结果表明：在相同质量分数范围内，纤维尺寸较大的针叶木浆料其屈服应力较大，并且随着纤维尺寸的增加，屈服应力与质量分数的幂率关系中乘数项系数增加而指数项系数减小；屈服应力不能由单一集聚因子的函数来表示，而同时与形状系数的指数函数成反比，即τ≈0.003·N^2.2/β^0.6。因此在相同集聚因子范围内，形状参数较小的阔叶木浆料具有更高的屈服应力；由于两种浆料混合后形状系数的常数次乘方值随着质量分数的增加基本呈线性关系，即β_AB^1.6≈β_B^1.6+（β_A^1.6-β_B^1.6）/100·x，所以混合浆料的屈服应力也呈现出如τ_y（AB）≈τ_y（B）+（τ_y（A）-τ_y（B））/100·x的近似线性变化。

关键词: 漂白硫酸盐木浆, 纤维悬浮液, 屈服应力, 集聚因子

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, τ_y≈0.003·N^2.2/β^0.6. 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, β_AB^1.6≈β_B^1.6+(β_A^1.6-β_B^1.6)/100·x, so the yield stresses of the mixed pulps also presented the similar rule with the mixing ratio changed as the formula, τ_y(AB)≈τ_y(B)+(τ_y(A)-τ_y(B))/100·x.

Key words: bleached kraft wood pulp, fiber suspension, yield stress, crowding number

中图分类号:

TQ35
TS71

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.

WANG Chen, ZHENG Xuemei, ZHANG Hui, SHA Jiulong, CHENG Jinlan. Influence of Fiber Size on Yield Stress of Bleached Kraft Wood Pulp Fiber Suspension[J]. Chemistry and Industry of Forest Products, 2017, 37(3): 89-94.

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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

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