挤压预处理对杨木APMP浆纤维形态及制浆性能的影响

doi:10.3969/j.issn.0253-2417.2019.06.015

林产化学与工业 ›› 2019, Vol. 39 ›› Issue (6): 109-114.doi: 10.3969/j.issn.0253-2417.2019.06.015

挤压预处理对杨木APMP浆纤维形态及制浆性能的影响

魏录录^1,²,严振宇¹,邓拥军¹,韩善明¹,梁龙^1,³,房桂干^1,^2,^3,*()

1. 中国林业科学研究院林产化学工业研究所; 生物质化学利用国家工程实验室; 国家林业和草原局林产化学工程重点实验室; 江苏省生物质能源与材料重点实验室, 江苏南京 210042
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
3. 中国林业科学研究院林业新技术研究所, 北京 100091

收稿日期:2019-06-26 出版日期:2019-12-28 发布日期:2019-12-21
通讯作者: 房桂干 E-mail:fangguigan@icifp.cn
作者简介:魏录录(1993— ),女,河北石家庄人,硕士生,研究方向为制浆造纸清洁生产
基金资助:
国家重点研发计划资助项目(2017YFD0601005);江苏省生物质能源与材料重点实验室基本科研业务费项目(JSBEM-S-201809)

Effect of Extrusion Pretreatment on Fiber Morphology and Pulping Properties of Poplar APMP Pulp

Lulu WEI^1,²,Zhenyu YAN¹,Yongjun DENG¹,Shanming HAN¹,Long LIANG^1,³,Guigan FANG^1,^2,^3,*()

1. Institute of Chemical Industry of Forest Products, CAF; National Engineering Lab. for Biomass Chemical Utilization; Key Lab. of Chemical Engineering of Forest Products, National Forestry and Grassland Administration; Key Lab. of Biomass Energy and Material, Jiangsu Province, Nanjing 210042, China
2. Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Nanjing Forestry University, Nanjing 210037, China
3. Research Institute of Forestry New Technology, CAF, Beijing 100091, China

Received:2019-06-26 Online:2019-12-28 Published:2019-12-21
Contact: Guigan FANG E-mail:fangguigan@icifp.cn
Supported by:
国家重点研发计划资助项目(2017YFD0601005);江苏省生物质能源与材料重点实验室基本科研业务费项目(JSBEM-S-201809)

摘要/Abstract

摘要：

在相同的APMP制浆工艺条件下，以未挤压木片为对照样，考察了双螺杆挤压（TSE）和单螺旋挤压（MSD）对纸浆纤维形态及制浆性能的影响。研究结果表明：在相同制浆工艺下，挤压程度越高，纸浆的长纤维及纤维束含量越低。当加拿大游离度为250 mL时，TSE挤压所得纸浆含纤维束1.78%，相对MSD挤压降低了76.67%。此外，经TSE挤压所得纸浆的耐破强度和抗张强度均高于对照样和MSD挤压；而TSE挤压所得纸浆因长纤维含量较低，使得其撕裂强度低于对照样和MSD挤压。当加拿大游离度为250 mL时，TSE挤压所得纸浆白度为65.48%（ISO），较MSD挤压提高了9.14%（ISO），较对照样提高12.94%（ISO）。由于TSE挤压后木片浸渍时反应更充分，有更多的物质溶出，因此其所得纸浆得率（84.54%）低于MSD挤压（87.20%）和对照样（87.00%），且制浆过程产生废水的COD和SS值均较高。

关键词: 螺旋挤压, APMP, 纤维形态, 纸浆性能, 杨木

Abstract:

The effects of twin screw extruder (TSE) and model screw device (MSD) on fiber morphology and pulping properties of pulp were investigated under the same APMP pulping process.The result showed that the low contents of fibril bundle and long fibers could be obtained under extrusion degree at the same pulping process. The TSE could result in a fiber bundle content of 1.78% in the Canada freeness of 250 mL. Compared with MSD extrusion, the extrusion decreased by 76.67%. In addition, the bursting strength and tensile strength of the pulp from TSE were higher than that of the untreated poplar and MSD treated poplar. However, the tearing strength of the pulp from TSE was lower than that of the pulp of untreated and MSD treated poplar because of the low content of long fiber. The brightness of pulp from TSE reached 65.48% in the Canada freeness of 250 mL, increased by 9.14% and 12.94% compared with MSD extrusion and the untreated poplar, respectively. The yield of the pulp was 84.54%, which was lower than the pulp yield of the MSD treated (87.20%) and the untreated poplar (87.00%), that because TSE dissolved more poplar compositions during the pulping process. Mean while, the wastewater pollution index was higher.

Key words: screw extrusion, APMP, fiber morphology, pulp property, poplar

中图分类号:

TQ35
TS74

魏录录,严振宇,邓拥军,韩善明,梁龙,房桂干. 挤压预处理对杨木APMP浆纤维形态及制浆性能的影响[J]. 林产化学与工业, 2019, 39(6): 109-114.

Lulu WEI,Zhenyu YAN,Yongjun DENG,Shanming HAN,Long LIANG,Guigan FANG. Effect of Extrusion Pretreatment on Fiber Morphology and Pulping Properties of Poplar APMP Pulp[J]. Chemistry and Industry of Forest Products, 2019, 39(6): 109-114.

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生产阶段 production stage	加入量dosage/%				浆料质量分数/% mass fraction of pulp	温度/ ℃ temperature	时间/min time
生产阶段 production stage	H₂O₂	NaOH	Na₂SiO₃	DTPA	浆料质量分数/% mass fraction of pulp	温度/ ℃ temperature	时间/min time
一段预浸渍 first stage pre-impregnation	2.0	2.5	0.8	0.3	35	90	30
二段浸渍 second stage impregnation	3.0	3.5	1.2	0.3	23	90	30

样品 sample	不同筛分粒径(μm)时的纤维质量分数fiber mass fraction at different screening particle size/%
样品 sample	≥1059.5	529.7~1059.5	296.6~529.7	148.3~296.6	74.2~148.3	≤74.2
TSE	1.29	4.33	24.78	32.60	6.77	30.23
MSD	7.35	6.86	20.80	32.72	6.16	26.11
对照样control	10.05	8.69	21.22	28.98	6.59	24.47

样品 sample	废水发生量/(m³·t^-1) wastewater generation	COD/ (kg·t^-1)	SS/ (kg·t^-1)
TSE	6.83	55.51	43.58
MSD	7.56	29.49	28.62
对照样control	7.47	34.23	33.27

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挤压预处理对杨木APMP浆纤维形态及制浆性能的影响

Effect of Extrusion Pretreatment on Fiber Morphology and Pulping Properties of Poplar APMP Pulp

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