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d-Na2Si2O5∕PVA对无机纤维软化增强及其在造纸上的应用研究
Study on the Enhancement of Inorganic Fiber by d-Na2Si2O5 / PVA and Its Application in Papermaking
收稿日期：2020-06-11  
DOI：10.11980/j.issn.0254-508X.2020.10.004
关键词:  无机纤维  软化增强  配抄  纸张性能
Key Words:inorganic fiber  softening and strengthening  blending  paper properties
基金项目:陕西省教育厅科学研究计划项目（19JK0933）；咸阳市科技计划项目（2018k02-49）；咸阳职业技术学院科研基金项目（2018KYC08）。
作者单位邮编
张婧 咸阳职业技术学院，陕西西安，712000
陕西科技大学，陕西西安，710021 		710021
侯党社 咸阳职业技术学院，陕西西安，712000 712000
辛莹娟 咸阳职业技术学院，陕西西安，712000 712000
鲍艳 陕西科技大学，陕西西安，710021 710021
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摘要:本研究以聚乙烯醇（PVA）、d-Na2Si2O5、甜菜碱为主要原料，对无机纤维（粉煤灰/煤矸石）进行软化增强研究，探索了软化增强较优工艺条件。通过扫描电子显微镜（SEM）等手段对软化增强纤维进行了表征；并将较优工艺下软化增强的无机纤维与漂白硫酸盐针叶木浆进行配抄，测其对纸张性能的影响。结果表明，软化增强较优工艺条件为：d-Na2Si2O5与PVA质量比为1∶1，反应温度60℃，反应时间2 h，pH值为9，冷冻温度-10℃，冷冻时间4 h，冻融5次，甜菜碱溶液质量分数10%；SEM分析表明，d-Na2Si2O5与PVA形成互穿网络并包覆在无机纤维表面，形成一层柔软的膜，使其强度增加，并在甜菜碱的作用下，纤维变得超细分散，从而使纤维柔软度提高；相比未添加无机纤维纸张，当无机纤维添加量为10%～20%时，所配抄纸张的挺度增加5～8 mN·cm、环压指数、抗张指数、耐折度和柔软度与未添加无机纤维纸张相当。
Abstract:This study used polyvinyl alcohol （PVA）， d-Na2Si2O5 and betaine as the main raw materials to softening and strengthening mineral inorganic fiber， and explored the better process of softening and strengthening. The softened reinforced fibers were characterized by scanning electron microscopy （SEM）. The properties of the paper prepared with blending softened and reinforced inorganic fibers and bleached softwood kraft pulp were tested. The results showed that the optimum process was as follows： the mass ratio of d-Na2Si2O5 to PVA was 1∶1， reaction temperature was 60℃， reaction time was 2 h， pH value was 9， freezing temperature was -10℃， freezing time was 4 h. Scanning electron microscope showed that d-Na2Si2O5 and PVA formed interpenetrating network and coated on the surface of inorganic fiber， forming a layer of soft membrane to increase its strength. Under the action of betaine， the fiber became superfine and dispersed， so that the softness of the fiber was improved. Compared with the paper without inorganic fiber，when the dosage of reinforced inorganic fiber was 10%～20%， the stiffness of the mixed paper by 5～8 mN·cm， The ring pressure index， tensile index， folding strength and softness of the paper were similar to those of the pure plant fiber paper.
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