Title:

Study on triple polyelectrolytes-modified GCC and its application in papermaking

作者：

陈南男¹, 王立军^1,2,3, 黄珏³, 田清泉³, 姚献平³

陈南男¹,王立军^1,2,3,黄珏³,田清泉³,姚献平³

Author(s):

CHEN Nannan¹, WANG Lijun^1,2,3, HUANG Jue³, TIAN Qingquan³, YAO Xianping³

CHEN Nannan¹, WANG Lijun^1,2,3, HUANG Jue³, TIAN Qingquan³, YAO Xianping³

单位:

1.浙江科技学院 生物与化学工程学院,杭州 310023; 2.浙江省废弃生物质循环利用与生态处理技术重点实验室,杭州 310023; 3.国家造纸化学品工程技术研究中心,杭州 311305

Unit:

1.School of Biological and Chemical Engineering, Zhejiang University of Science and Technology, Hangzhou 310023, Zhejiang, China; 2.Key Laboratory of Recycling and Eco-treatment of Waste Biomass of Zhejiang Province, Hangzhou 310023, Zhejiang, China; 3.National Engineering and Technology Research Center for Paper Chemicals, Hangzhou 311305, Zhejiang, China

关键词:

碳酸钙; 聚合电解质复合物; 灰分; 强度性能

碳酸钙; 聚合电解质复合物; 灰分; 强度性能

Keywords:

calcium carbonate; polyelectrolyte complex; ash; strength properties纤维和填料是造纸的主要原料。造纸过程中采用更多的填料替代纤维可以有效降低成本; 同时有望改善纸张的表面性能、印刷效果等品质。但是采用传统的加填工艺增加填料含量; 由于常用无机填料不能与纸浆纤维产生有效氢键结合; 从而导致成纸强度性能的下降; 纸品也因此容易产生掉毛掉粉等问题^[1-3]。为了既提高纸张的灰分含量又避免高加填对纸张物理性能造成不良影响; 造纸工作者提出了多种填料改性技术; 如淀粉^[4-8]、阳离子聚丙烯酰胺^[9-10]等物质被用于填料改性。淀粉或其改性产物如被有效吸附在填料表面并形成包覆体; 可依赖分子中含有的大量羟基与纸浆纤维产生氢键结合; 从而降低加填带来的负面影响; 阳离子聚丙烯酰胺则可通过与填料表面发生电荷中和、架桥等相互作用; 使填料粒子发生聚集; 从而大幅降低填料的总体比表面积; 即降低填料与纤维间的总体接触面积; 由此有效改善加填纸的强度性能^[11-12]。通常改性淀粉和聚丙烯酰胺等助剂都以一元的形式应用于填料改性。部分研究者也提出了双元聚合物体系改性填料的方法^[13-14]; 其原理是利用相反电荷的聚合电解质接触时; 通过静电、氢键、配位等作用形成聚合电解质复合物可自发沉积甚至包裹在填料粒子表面; 与填料之间形成稳定的壳-核结构; 从而改善填料粒子或其聚集体与纤维的接触^[15-17]。本试验尝试采用APAM/CSt/CPAM三元聚合物体系对研磨碳酸钙(GCC)进行改性; 目的是更好地利用聚合电解质形成复合物的原理。同时; 鉴于以往的改性技术实施时; 对改性产物颗粒大小的实时监控存在不足; 本试验利用聚焦光束反射测定仪监测了填料改性过程中填料及其聚集体尺度的变化; 再将改性后的填料用于加填抄纸并考察改性填料对纸张性能的影响。

分类号:

TS727.2

DOI:

10.3969/j.issn.1671-8798.2017.05.006

文献标识码:

A

摘要:

利用阴离子聚丙烯酰胺(APAM)、阳离子淀粉(CSt)和阳离子聚丙烯酰胺(CPAM)形成聚合电解质复合物并自发沉积包覆在造纸用研磨碳酸钙(GCC)表面,同时引起填料预絮聚从而完成填料的改性; 将改性后的填料用于纸张加填并探究其对纸张物理性能的影响。结果表明:相比于未改性的碳酸钙,经APAM/CSt/CPAM三元体系改性的碳酸钙,平均弦长增大为初始填料的9倍,其加填纸的成纸灰分提高了2.2倍(灰分含量达到16.32%),且纸张的抗张强度维持不变。

Abstract:

The polyelectrolyte complex(PEC), formed by combining anionic polyacrylamide(APAM), cationic starch(CSt)and cationic polyacrylamide(CPAM), coated and modified the ground calcium carbonate(GCC)with a dual mechanism of spontaneous deposition and filler flocculation. Subsequently, the modified filler was employed for paper filling to probe into its effect on the physical properties of paper. The results indicated that compared to the untreated calcium carbonate, the mean chord length of the calcium carbonate modified by APAM/CSt/CPAM was 9 times that of the original filler, and the ash content of filled hand sheet up to 16.32% increased 2.2 times, while the tensile strength of the paper remained unchanged.

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备注/Memo:

收稿日期: 2017-05-26
通信作者: 王立军(1971— ),男,浙江省诸暨人,教授,博士,主要从事纸机湿部化学与应用研究。E-mail:wanglijun@zust.edu.cn。