AKD预絮聚工艺对纸张施胶效果的影响

doi:10.3969/j.issn.0253-2417.2022.05.010

林产化学与工业 ›› 2022, Vol. 42 ›› Issue (5): 69-75.doi: 10.3969/j.issn.0253-2417.2022.05.010

AKD预絮聚工艺对纸张施胶效果的影响

赵丽红¹^,²(), 柯珣², 吴敏¹, 王志伟¹, 钱丽颖², 任俊莉²^,*()

1. 广西大学广西清洁化制浆造纸与污染控制重点实验室，广西南宁 530004
2. 华南理工大学制浆造纸工程国家重点实验室，广东广州 510640

收稿日期:2021-12-06 出版日期:2022-10-28 发布日期:2022-11-02
通讯作者: 任俊莉 E-mail:zhaolh@scut.edu.cn;renjunli@scut.edu.cn
作者简介:任俊莉，研究员，博士生导师，从事木质纤维高效利用的基础研究；E-mail: renjunli@scut.edu.cn
赵丽红(1978—)，女，黑龙江齐齐哈尔人，副研究员，主要从事纸基功能材料和造纸湿部化学方面的研究；E-mail: zhaolh@scut.edu.cn
基金资助:
广西清洁化制浆造纸与污染控制重点实验室开放基金资助项目(2021KF24)

Effect of the Pre-flocculation of AKD on Paper Sizing Effeciency

Lihong ZHAO¹^,²(), Xun KE², Min WU¹, Zhiwei WANG¹, Liying QIAN², Junli REN²^,*()

1. Guangxi Key Laboratory of Clean Pulp & Papermaking and Pollution Control, Guangxi University, Nanning 530004, China
2. State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510640, China

Received:2021-12-06 Online:2022-10-28 Published:2022-11-02
Contact: Junli REN E-mail:zhaolh@scut.edu.cn;renjunli@scut.edu.cn

摘要/Abstract

摘要：

为了促使施胶剂烷基烯酮二聚体(AKD)在浆料系统中获得更高的留着率，提高与纤维发生反应的几率，采用造纸系统中常用的助留剂组分阳离子聚丙烯酰胺(CPAM)、阳离子淀粉(CS)以及膨润土(BN)对AKD进行预絮聚，以达到提高施胶效率的目标。通过改变3种助留剂的添加顺序，得到3种AKD预絮聚工艺(E、F、G)，考察了不同预絮聚工艺对AKD絮聚体粒径、比表面积、体系浊度、Zeta电位，以及纸张施胶效果的影响。实验结果表明：预絮聚使AKD胶粒尺寸显著增大，工艺E、F、G所得AKD絮聚体的中值粒径分别为223.144、310.461和263.026 μm，体系浊度明显降低。3种AKD预絮聚工艺中，工艺浆料-E-PCC中先加膨润土和CS进行静电吸附，再进行CPAM的架桥作用，AKD絮聚体与纤维的结合作用更强，吸附10 min时，纤维对AKD的吸附量达到2.151 mg/g。工艺E所得AKD絮聚体与PCC共混施胶加填时，纸张可勃值(Cobb₆₀)降低到20.15 g/m²，填料留着率达90.51%，40天施胶逆转率降低到5.49%。

关键词: 施胶, 预絮聚, AKD, 粒径

Abstract:

In order to obtain higher retention rate of alkyl ketene dimer(AKD) in the slurry system and improve the reaction between AKD and the cellulosic fibers, common of cationic polyacrylamides(CPAM), cationic starch(CS), and bentonite(BN), which are the common retention aids in papermaking systems were chosen to pre-flocculate AKD and thus improved its sizing efficiency. Three AKD pre-flocculation processes(E, F, G) were obtained by changing the addition sequence of the three retention aids. The effects of three pre-flocculate processes on AKD floc particle size, specific surface area, system turbidity, zeta potential, and paper sizing were investigated. The results showed that the pre-flocculation process significantly increased the size of the AKD colloidal particles. The median particle sizes of AKD flocs obtained from processes E, F, and G were 223.144, 310.461 and 263.026 μm, respectively, and the turbidity of the pulp suspension was effectively reduced. Among the three pre-flocculation processes, the pulp-E-PCC, in which the negatively charged bentonite and positively charged CS were attracted with AKD by electrostatic force, followed by the bridging effect from CPAM, generated AKD floc with a stronger binding to fibers. The adsorption of AKD by the fiber reached 2.151 mg/g at 10 min of adsorption. When AKD flocs from process E were blended with PCC for sizing and filling, the Cobb₆₀ value of the paper sheets reduced to 20.15 g/m², filler retention reached 90.51%, and the sizing reversal rate in 40 days decreased to 5.49%.

Key words: sizing, pre-flocculation, AKD, particle size

中图分类号:

TQ35
TS7

赵丽红, 柯珣, 吴敏, 王志伟, 钱丽颖, 任俊莉. AKD预絮聚工艺对纸张施胶效果的影响[J]. 林产化学与工业, 2022, 42(5): 69-75.

Lihong ZHAO, Xun KE, Min WU, Zhiwei WANG, Liying QIAN, Junli REN. Effect of the Pre-flocculation of AKD on Paper Sizing Effeciency[J]. Chemistry and Industry of Forest Products, 2022, 42(5): 69-75.

图/表 7

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参考文献 20

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预絮聚工艺 pre flocculation process	浊度/NTU turbidity	中值粒径/μm median particle size
AKD-BN	22.80	47.545
AKD-[BN-CS]	7.36	46.790
E	1.36	223.144
E-PCC	46.05	69.917
AKD-[CS]	42.90	41.119
AKD-[CS-BN]	3.42	76.840
F	1.26	310.461
F-PCC	46.05	80.190
AKD-[BN-CPAM]	3.35	239.920
G	3.33	263.026
G-PCC	41.05	77.394

工艺 process	Cobb₆₀值/(g·m^-2) Cobb₆₀ value	接触角/° contact angle
浆料-E pulp-E	19.65	141.4
浆料-F pulp-F	19.15	142.2
浆料-G pulp-G	19.15	142.1

工艺 process	Cobb₆₀值/(g·m^-2) Cobb₆₀ value	填料留着率/% filler retention	烘干纸页含水量/% moisture content of dried paper	不同时间后接触角/° contact angle after different time
工艺 process	Cobb₆₀值/(g·m^-2) Cobb₆₀ value	填料留着率/% filler retention	烘干纸页含水量/% moisture content of dried paper	1 d	20 d	40 d
传统工艺 traditional technology	32.20	87.43		117.2
浆料-E-PCC pulp-E-PCC	20.15	90.51	8.79	134.8	128.0	127.4
浆料-F-PCC pulp-F-PCC	20.45	86.55	11.90	133.5	124.4	122.9
浆料-G-PCC pulp-G-PCC	37.60	87.63	16.18	113.1	94.0	85.8

絮聚时间/min flocculation time	中值粒径/μm median particle size	Cobb₆₀值/(g·m^-2) Cobb₆₀ value	填料留着率/% filler retention
0.5	168.089	19.90	88.98
1.0	223.144	20.15	90.51
1.5	257.526	21.40	91.57
2.0	277.836	23.50	92.21
3.0	275.056	34.55	91.16

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AKD预絮聚工艺对纸张施胶效果的影响

Effect of the Pre-flocculation of AKD on Paper Sizing Effeciency

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