【作者】 李广胜；

【导师】 李友明； 陈洋；

【作者基本信息】 华南理工大学 ， 轻工技术与工程， 2014， 硕士

【摘要】 近年来，开发和生产防潮性能好的包装用纸已逐渐受到国内外造纸行业的广泛关注。随着造纸厂以废纸为原料的趋势的逐渐增大，出现了不少质量问题，所以需要通过表面施胶等手段提高纸张质量。采用表面施胶技术，较好解决了二次纤维重复使用造成的品质低劣问题，这对造纸工业可持续发展及发展循环经济具有极其重要的意义。本文主要开发了一种新型（AKD/石蜡）阳离子复合表面施胶剂，提供一种复配阳离子表面施胶剂的新工艺。解决经常用施胶剂施胶后纸张熟化时间长、存放一段时间后易还潮等问题。结果表明：此种（AKD/石蜡）阳离子复合施胶剂的制备工艺简单，成本低，更适合于工厂规模化生产。经过对（AKD/石蜡）表面施胶剂和阳离子SAE的物理性能对比，结果显示（AKD/石蜡）表面施胶剂更适宜于表面施胶。通过对瓦楞原纸进行表面施胶和电子扫描观察等实验室研究，结果表明：经两种表面施胶剂施胶后纸张纤维间结合的更加紧密，在纸张的表面形成连续的膜。阳离子SAE表面施胶剂施胶后的纸张表面成膜性能比（AKD/石蜡）阳离子复合表胶成膜性能稍好。综合成本考虑，当阳离子复合施胶剂量按每吨纸2kg，淀粉40kg时，各项指标均衡，综合性价比最高，是优选方案。采用（AKD/石蜡）施胶剂施胶比采用阳离子SAE表面施胶剂施胶，吨纸可降低成本4元，经济效益非常可观，表明了此种阳离子复合施胶剂的应用可行性。本课题还探讨了两种表面施胶剂在工厂实践中的应用效果，在两工厂的上机试验中，二者的抗水性相同。但是经（AKD/石蜡）阳离子表面施胶剂施胶后的纸张的强度性能优于阳离子SAE施胶后的强度性能，尤其是耐折度，提高了35.9%，撕裂度提高了12.1%。由回潮结果可以看出，经（AKD/石蜡）阳离子表面施胶剂施胶后纸张的回潮率比经阳离子SAE施胶后纸张的回潮率低，分别为32.61%和34.74%。综上所述，采用AKD和石蜡复配的阳离子复合表面施胶剂，复配工艺简单且成本低，能够提高纸张的抗水性和强度性能，作为新型表面施胶剂用于纸张的表面施胶是可行的，可以达到开发应用新型造纸化学品的目的，实现了资源的超值利用及环保节能。更多还原

【Abstract】 In recent years, development and production of moisture-proof packaging paper haveobtained widespread attention from paper industry at home and abroad. When waste paper isused as the main raw material to produce moisture-proof packaging paper, some problemswith the quality of the products occur. Application of surface sizing could solve the problemscaused by repeated use of secondary fiber and improve quality of the products. As a result,surface sizing technology is extremely important for sustainable development of paperindustry and development of recycling economy.A new kind of cationic complex formulation surface sizing agent synthesized by AKDand paraffin is developed and the process for the synthesis of this cationic surface sizing agentis provided. The purpose of the research is to shorten the aging time and enhance humidityresistance of the paper with surface sizing. The results showed that preparation process of thiskind of AKD/paraffin cationic complex surface sizing agent is simple, low cost and suitablefor large-scale production in the factory.Comparison of the physical performance of this AKD/paraffin surface sizing agent andthe cationic SAE surface sizing agent indicated that this AKD/paraffin surface sizing agent ismore suitable for surface sizing. SEM analysis indicated that fibers in the corrugated paperafter surface sizing by these two kinds of surface sizing agent bound more closely and a layerof continuous film was formed on the surface of the paper. Film-forming property of the paperwith surface sizing by cationic SAE surface sizing agent was slightly better than the AKD/paraffin surface sizing agent. Considering the cost of production, when2Kg/t of the cationiccomplex surface sizing agent and40Kg/t of the starch were used for surface sizing,satisfactory sizing efficiency was achieved, which is cost-effective when compared withapplication of other surface sizing agents. The production cost was reduced by4RMB foreach ton of paper produced by using AKD/paraffin sizing agent, compared with cationic SAEsurface sizing agent, indicating the practical application feasibility of such a cationic complexsizing agent.The practical application efficiency of the two kinds of surface sizing agent in factorywas also discussed in the paper. The water resistance performance of these two surface sizingagents was the same based on the results of machine test in two factories. However, strengthproperties of the corrugated paper after surface sizing by AKD/paraffin cationic complexsurface sizing agent were better than the paper after surface sizing by cationic SAE surfacesizing agent. Especially, the folding strength improved by35.9%and tearing strength improved by12.1%after surface sizing by AKD/paraffin cationic complex surface sizingagent. On the other hand, results showed that the moisture regain rate of the paper aftersurface sizing by AKD/paraffin cationic complex surface sizing agent was32.61%, whichwas lower than the moisture regain rate of34.74%after surface sizing by and cationic SAEsurface sizing agent.In summary, the cationic complex formulation surface sizing agent which is synthesizedby AKD and paraffin with simple and low cost process can improve the water resistanceperformance and strength properties of the paper and is feasible for use as a new surfacesizing agent of paper. Practical application of this surface sizing agent in paper industry is infavor of developing new paper chemicals, realizing high value utilization of resources andenvironmental protection and energy saving.更多还原