带电纳米颗粒对烯基琥珀酸酐乳液形态和施胶机制的调控

项目名称： 带电纳米颗粒对烯基琥珀酸酐乳液形态和施胶机制的调控

项目编号： No.31270625

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 农业科学

项目作者： 刘温霞

作者单位： 齐鲁工业大学

项目金额： 82万元

中文摘要： 纸张施胶是典型的胶体与界面化学过程，施胶剂通过适当乳化与适时铺展于纤维表面才能充分发挥其施胶潜力。反应型施胶剂烯基琥珀酸酐（ASA）常因乳化中引入表面活性物质，使其施胶时发生过早铺展，不仅加速其水解、降低其施胶效率、导致其施胶对铝盐的过分依赖，也引起有关ASA施胶机理的争议。为避免表面活性剂的不利影响，本项目拟以带电纳米颗粒稳定ASA乳液，研究各种带电纳米颗粒及带电纳米颗粒之间、带电纳米颗粒与聚合硫酸铝及与尿素、丙氨酸联合时，对ASA－水界面性质、ASA水解和ASA乳液形态与性质的影响；通过合理设计带电纳米颗粒稳定体系，调整ASA－水界面张力、乳液形态与性质，达到调控ASA液滴在纤维表面铺展的目的；通过分析不同铺展行为的乳液在纤维表面铺展和施胶后化学成分、施胶度的差异，阐明不同界面张力下ASA的施胶机制。这对发展环境友好的高效施胶剂乳液、丰富胶体与界面化学理论具有重要意义。

中文关键词： 烯基琥珀酸酐；乳液；纳米颗粒；改性；施胶

英文摘要： Paper sizing is a typical problem of colloid and interface science. For a paper sizing agent, emulsification to form fine emulsion and spreading on fiber surfaces at a right moment, both of which correlate with the sizing agent and water interfacial properities, are prerequisites for adequate sizing development in paper manufacture. Akenyl succinic anhydride (ASA), a high reacitive sizing agent, would be apt to spread on water-wetted paper surface when the interfacial tension of ASA-water is excessively reduced by surface-active substances in ASA emulsions, resulting in significant hydrolysis and reduction of the sizing performance of ASA. This not only leads to the dependence of ASA sizing efficiency on alum but also causes considerable controversy in its sizing mechanism. In this project, charged nanoparticles are used to stabilize ASA emulsions in order to avoid the adverse effect of surface-active substances. The effects of charged nanoparticles, including Laponite, titania and silica either alone, two of them used together or respectively together with polyaluminum sulfate, urea, and alanine, on the ASA-water interfacial tension, ASA hydrolysis, ASA emulsion morphology and properites are investigated. By designing appropriate nanoparticle stabilizing systems, the ASA-water interfacial tension, ASA emulsion

英文关键词： Alkenyl succinic anhydride；emulsions；nanoparticles；modification；sizing