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PAE-SA二元体系对混合废纸增强效果及机理探究

类延豪 白媛媛 姚春丽

类延豪, 白媛媛, 姚春丽. PAE-SA二元体系对混合废纸增强效果及机理探究[J]. 北京林业大学学报, 2017, 39(6): 123-130. doi: 10.13332/j.1000-1522.20170079
引用本文: 类延豪, 白媛媛, 姚春丽. PAE-SA二元体系对混合废纸增强效果及机理探究[J]. 北京林业大学学报, 2017, 39(6): 123-130. doi: 10.13332/j.1000-1522.20170079
LEI Yan-hao, BAI Yuan-yuan, YAO Chun-li. Strengthening effect and mechanism of PAE-SAbinary system on mixed wastepaper[J]. Journal of Beijing Forestry University, 2017, 39(6): 123-130. doi: 10.13332/j.1000-1522.20170079
Citation: LEI Yan-hao, BAI Yuan-yuan, YAO Chun-li. Strengthening effect and mechanism of PAE-SAbinary system on mixed wastepaper[J]. Journal of Beijing Forestry University, 2017, 39(6): 123-130. doi: 10.13332/j.1000-1522.20170079

PAE-SA二元体系对混合废纸增强效果及机理探究

doi: 10.13332/j.1000-1522.20170079
基金项目: 

国家林业局引进项目 20140436

国家自然科学基金项目 31470605

详细信息
    作者简介:

    类延豪。主要研究方向:二次纤维利用和造纸化学品。Email:leiyanhao@126.com  地址: 100083 北京市海淀区清华东路35号北京林业大学材料科学与技术学院

    责任作者:

    姚春丽, 博士, 教授。主要研究方向:生物质材料、二次纤维利用和造纸化学品。Email:chunliyao2006@163.com  地址:同上

  • 中图分类号: TS753.9

Strengthening effect and mechanism of PAE-SAbinary system on mixed wastepaper

  • 摘要: 选用海藻酸钠(SA)作为废纸纤维增强助剂与聚酰胺多胺环氧氯丙烷(PAE)组成二元体系,研究PAE及PAE-SA二元体系对废纸的增强效果,发现PAE-SA二元体系对废纸增强效果显著,明显优于PAE,且可降低PAE的用量,起到环保作用。通过PAE、SA、PAE-SA二元体系的膜红外谱图分析,扫描电镜和原子力显微镜对废纸表面微观形态的观察,元素含量分析以及纸浆细小组分留着率的测定,探究PAE-SA二元体系的增强机理。结果表明:单独添加PAE时,0.8%PAE对废纸增强效果最佳,干强指数比空白增加17.11%,湿强指数比空白增加1 500.00%;添加0.8%PAE+0.4%SA时,干强指数、湿强指数相对于单加0.8%PAE依次增加26.65%、81.25%,且耐破度、撕裂度均有显著增强。通过机理探究发现:PAE与SA两者之间不发生反应,在协同作用过程中主要依靠静电吸附和膜包覆,通过增加纤维对PAE的吸附,增加PAE的自交联及与纤维的共交联,从而增加纤维对细小组分的吸附及纤维间的结合面积,进而增强废纸的性能。

     

  • 图  1  PAE(a)、SA(b)与PAE-SA(c)的膜红外谱图

    Figure  1.  FT-IR spectra of PAE(a), SA(b) and PAE-SA (c) film

    图  2  空白、添加PAE以及PAE-SA的废纸纤维表面和纤维断面电镜图

    Figure  2.  Surface and cross section SEM images of the fibers in wastepaper added with none, PAE and PAE-SA

    图  3  空白、添加PAE以及PAE-SA二元体系的废纸AFM图

    Figure  3.  AFM images of wastepaper added with none, PAE and PAE-SA

    表  1  PAE(a)、SA(b)与 PAE-SA(c)的膜红外谱图

    Table  1.   FT-IR spectra of PAE(a), SA(b) and PAE-SA (c) film

    PAE添加量
    Dosage of PAE
    干抗张指数
    Dry tensile
    index/
    (N·m·g-1)
    湿抗张指数
    Wet tensile
    index/
    (N·m·g-1)
    湿干抗张指数比
    Wet to dry tensile
    strength ratio/%
    0 29.8 0.5 1.7
    0.2% 30.0 5.1 17.0
    0.4% 32.6 5.7 17.5
    0.6% 33.9 6.6 19.5
    0.8% 34.9 8.0 23.0
    1.0% 33.7 7.1 21.1
    1.2% 34.0 7.2 21.2
    注:添加量均为相对手抄片绝干浆的质量分数。下同。Notes: dosage in the study means the mass fraction to bone dry pulp. The same as below.
    下载: 导出CSV

    表  2  PAE-SA二元体系SA加入量对废纸强度性能的影响

    Table  2.   Effects of SA addition on the strength of wastepaper in PAE-SA binary system

    PAE加入量
    Dosage of
    PAE
    SA加入量
    Dosage of
    SA
    干抗张指数
    Dry tensile index/
    (N·m·g-1)
    湿抗张指数
    Wet tensile index/
    (N·m·g-1)
    撕裂指数
    Tear index/
    (mN·m2·g-1)
    耐破指数
    Burst index/
    (kPa·m2·g-1)
    耐折度(双折)/次
    Folding endurance
    (double folds)/time
    0.8% 0 34.9 8.0 9.0 3.4 28
    0.8% 0.2% 42.7 10.2 10.0 3.9 40
    0.8% 0.4% 44.2 14.5 11.5 4.0 55
    0.8% 0.6% 43.4 9.8 9.0 4.1 52
    0.8% 0.8% 40.8 9.5 11.0 4.4 44
    0.8% 1.0% 39.6 8.6 9.1 4.1 42
    下载: 导出CSV

    表  3  SA、PAE、PAE-SA二元体系对废纸的性能增强对比

    Table  3.   Comparison of SA, PAE, PAE-SA binary system on the improved performance of wastepaper

    PAE加入量
    Dosage of
    PAE
    SA加入量
    Dosage of
    SA
    干抗张指数
    Dry tensile index/
    (N·m·g-1)
    湿抗张指数
    Wet tensile index/
    (N·m·g-1)
    撕裂指数
    Tear index/
    (mN·m2·g-1)
    耐破指数
    Burst index/
    (kPa·m2·g-1)
    耐折度(双折)/次
    Folding endurance
    (double folds)/time
    0 0 29.8 0.5 6.3 3.2 17
    0 0.3% 30.2 0.5 6.8 3.3 18
    0 0.9% 32.0 0.6 6.8 3.3 20
    0.4% 0 32.6 5.7 9.2 3.8 27
    0.8% 0 34.9 8.0 9.0 3.4 28
    0.8% 0.2% 42.7 10.2 10.0 3.9 40
    0.8% 0.4% 44.2 14.5 11.5 4.0 55
    下载: 导出CSV

    表  4  PAE、PAE-SA二元体系的废纸中元素质量分数对比

    Table  4.   Comparison of the mass fraction of elements in wastepaper added with PAE and PAE-SA

    PAE加入量
    Dosage of PAE
    SA加入量
    Dosage of SA
    N元素质量分数
    Nitrogen mass fraction
    C元素质量分数
    Carbon mass fraction
    H元素质量分数
    Hydrogen mass fraction
    0 0 0.067% 42.550% 6.299%
    0.2% 0 0.119% 42.385% 6.278%
    0.8% 0 0.104% 42.275% 6.321%
    0.8% 0.4% 0.099% 42.155% 6.288%
    0.8% 0.6% 0.102% 42.460% 6.324%
    下载: 导出CSV

    表  5  PAE、PAE-SA二元体系对纸浆细小组分留着率的影响

    Table  5.   Effects of PAE and PAE-SA binary system on theretention rate of fines

    PAE加入量
    Dosage of PAE
    SA加入量
    Dosage of SA
    细小组分留着率
    Retention rate of fine/%
    0 0 45.39
    0.8% 0 57.40
    0.8% 0.2% 62.75
    0.8% 0.4% 78.96
    0.8% 0.6% 71.44
    0.8% 0.8% 68.68
    0.8% 1.0% 64.73
    下载: 导出CSV
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  • 收稿日期:  2017-03-14
  • 修回日期:  2017-04-24
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