化工进展 ›› 2021, Vol. 40 ›› Issue (S1): 357-365.DOI: 10.16085/j.issn.1000-6613.2020-2397

• 精细化工 • 上一篇    下一篇

烷基烯酮二聚体施胶体系对挂面再生纸表面不良施胶的成因剖析

李婷1(), 崔锦峰1(), 郭润兰1, 杜少辉2, 于乐2, 王振军2, 李虎林2, 阎银鹏2   

  1. 1.兰州理工大学石油化工学院,甘肃 兰州 730050
    2.甘肃静宁县恒达有限责任公司,甘肃 静宁 743400
  • 收稿日期:2020-11-29 修回日期:2021-01-22 出版日期:2021-10-25 发布日期:2021-11-09
  • 通讯作者: 崔锦峰
  • 作者简介:李婷(1996—),女,硕士研究生,研究方向为本征阻燃聚合物纸张施胶剂。E-mail:2524284872@qq.com

Analysis of the causes of AKD sizing system on adverse sizing of the surface of the recycled paper

LI Ting1(), CUI Jinfeng1(), GUO Runlan1, DU Shaohui2, YU Le2, WANG Zhenjun2, LI Hulin2, YAN Yinpeng2   

  1. 1.College of Petrochemical Engineering, Lanzhou University of Technology, Lanzhou 730050, Gansu, China
    2.Gansu Jingning Hengda Limited Liability Company, Jingning 743400, Gansu, China
  • Received:2020-11-29 Revised:2021-01-22 Online:2021-10-25 Published:2021-11-09
  • Contact: CUI Jinfeng

摘要:

针对某造纸厂再生纸抄造工程实际中,烷基烯酮二聚体(AKD)表面施胶挂面再生纸耐水性能提高不明显的质量问题,采用接触角、红外光谱(FTIR)、热重(TG)、X射线光电子能谱技术(XPS)、扫描电镜(SEM)、能谱(EDS)等研究方法,对纸厂生产的AKD施胶挂面再生纸纸样进行表征研究。结果表明,纸样接触角变化表现两面性差异,施胶纸样正面初期接触角为114.5°,反面初期接触角为118.5°,正面临界润湿接触角(≥90°)时间不足9min,反面临界润湿接触角为9min,纸样不具备长效耐水性,AKD施胶体系对纸张长效耐水性的贡献不明显;施胶后AKD特征官能团β-乙烯基丙内酯消失,施胶纸样和施胶萃取纸样在不同氛围下的失重行为不同,原子组成和原子价态化学环境不同,施胶纸样中含有可被四氢呋喃(THF)抽出的可溶物(AKD水解产物酮),水解产物酮相对含量高于99.0%。AKD不良施胶的主要原因在于施胶体系配伍不当,导致AKD与纤维素酯化接枝反应的具有长效耐水产物的量不足。

关键词: 造纸化学品, 烷基烯酮二聚体施胶剂, 表面施胶, 挂面再生纸, 纸张耐水性, 不良施胶

Abstract:

Aiming at the quality problem that the water resistance of alkyl ketene dimer (AKD) surface sizing recycled paper is not significantly improved in the actual paper making project of a paper mill, the paper samples of AKD sizing produced by paper mill were characterized by contact angle, infrared spectra (FTIR), thermogravimetry (TG), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), energy spectrum (EDS) research methods. The results show that the change in paper-like contact angle shows two-sided difference, the initial contact angle of the positive surface of the sizing paper is 114.5°, and the reverse surface is 118.5°, the positive urban wetting contact angle (≥90°) is less than 9 minutes, and the negative direction is 9 minutes. The paper sample does not have long-lasting water resistance, and the contribution of the AKD sizing system on the long-acting water resistance of paper is not obvious. After the application, the AKD feature functional group β-vinyl propyl lactone disappears, the weight loss behavior of the sizing paper sample and the sizing extraction paper sample were different in different atmosphere, the atomic composition and the atomic valence chemical environment are different. The sizing paper sample contained soluble substance that could be extracted by tetrahydrofuran (THF) (AKD hydrolysate ketone), and the relative content of the hydrolysate ketone was higher than 99%. The main reason for the adverse sizing of AKD is the improper compatibility of sizing system, which leads to the shortage of long-term water-resistant products in the esterification grafting reaction of AKD and cellulose.

Key words: paper chemicals, alkyl ketene dimer sizing agent, surface sizing, recycled paper, water resistance of paper, adverse sizing

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