烷基烯二聚体乳剂和改性树脂酸在纤维素和废悬浮液中的应用特点,以获得高质量的纸张和纸板

Q4 Chemistry
V. Fleisher, N. Chornaya, Z. Shashok
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引用次数: 2

摘要

用烷基烯二聚体(AKD)和马来酸单乙基纤维素溶液(TM)和单乙醇胺(TMAS-3N)改性的树脂酸浆料乳液的特点,用于含针叶和硬木的初级(硫酸盐纤维素(未漂白和漂白))和次级(废纸)半成品的纤维悬浮液的疏水性,这些纤维悬浮液的分数组成和研磨程度(25-70°SR)不同。AKD乳液的分散相颗粒含量为0.08% ~ 0.30%,TM和TMAS-3N的分散相颗粒含量为0.20% ~ 2.00%。结果表明,AKD、TM和TMAS-3N乳液的疏水效果随着二次纤维半成品的替换而增强;它取决于纤维悬浮液的研磨程度及其分数组成。烷基烯二聚体乳液的一个特点是其颗粒能够与纤维的羟基形成疏水β-酮醚键,当使用纤维素纤维而不是再生纤维时,这种键的数量显著增加。使用TM和TMAS-3N松香乳液的一个特点是它们在电解质存在下形成上浆复合物的能力,这使得它们有可能确保与纤维(纤维素和废纸)表面的静电相互作用。与TM相比,TMAS-3N乳液的优点是可以将分散相颗粒含量降低1.8-6.6倍,同时实现高疏水性(单侧湿润吸收不超过21 g/m2),并保持纸张和纸板的原始强度。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Features of application of alkylketene dimer emulsions and modified resin acids in cellulosic and waste suspensions for obtaining high-quality types of paper and cardboard
The features of the use of sizing emulsions of alkyl ketene dimers (AKD) and resin acids modified with monoethyl cellosolve maleate (TM) and monoethanolamine (TMAS-3N) for hydrophobization of fibrous suspensions containing primary (sulphate cellulose (unbleached and bleached) from coniferous and hardwood) and secondary (waste paper) semi-finished products, differing in fractional composition and degree of grinding (25-70 °SR). The content of particles of the dispersed phase of the emulsions varied from 0.08 to 0.30 % for the AKD emulsion and from 0.20 to 2.00 % for TM and TMAS-3N. It has been established that the hydrophobic effect of AKD, TM and TMAS-3N emulsions increases when secondary fibrous semi-finished products are replaced with primary ones; it depends on the grinding degree of the fibrous suspension and its fractional composition. A feature of the use of alkyl ketene dimers emulsion lies in the ability of its particles to form hydrophobic β-ketoether bonds with hydroxyl groups of fibers, the number of which increases singnificantly when cellulose fibers are used instead of recycled ones. A feature of the use of TM and TMAS-3N rosin emulsions is their ability to form sizing complexes in the presence of electrolyte, which makes it possible to ensure their electrostatic interaction with the surface of fibers (cellulose and waste paper). The advantage of the TMAS-3N emulsion as compared to TM is the possibility of reducing the content of particles of the dispersed phase by 1.8-6.6 times while achieving high hydrophobicity (absorption with one-sided wetting does not exceed 21 g/m2) and maintaining the original strength of paper and cardboard.
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来源期刊
CiteScore
0.30
自引率
0.00%
发文量
38
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