【作者】 刘洋；

【导师】 张力平；

【作者基本信息】 北京林业大学 ， 林产化学加工工程， 2018， 硕士

【摘要】 本论文主要围绕阻燃/荧光复合功能再生纤维素材料的制备展开研究,使其能在消防服装和家用壁纸等领域得到应用,从而拓宽纤维素制品的利用空间。本文分别采用阻燃后整理改性和共混改性的方法,在双组分离子液体体系中对再生纤维素纤维进行了阻燃和荧光改性研究;并基于此,采用共混与后整理两种改性联用的方法制备阻燃/荧光复合功能再生纤维,探究制备工艺对该纤维性能的影响机制,并对其耐水洗性能进行了研究。利用不同的阻燃改性方法对纤维素进行改性,并考察不同阻燃改性方法对纤维性能的影响机制,优化阻燃改性方法。试验结果表明阻燃后整理改性的纤维素纤维的极限氧指数能达到35,表现出优良的阻燃性能。同时通过观察不同阻燃纤维的结构形貌、TGA和DSC分析可以得出,阻燃后整理纤维的纤维结构要优于共混阻燃纤维,且具有较高的热稳定性能;此外,该纤维的阻燃机理主要以凝聚相阻燃机理为主;相比其他阻燃纤维,机械性能略有下降。采用共混改性方法制备荧光再生纤维素纤维。通过调控荧光剂与纤维素之间的浓度配比,研究不同荧光添加剂的浓度对纤维性能的影响。研究结果表明:当ZnS:Cu的含量达到0.56wt%时,纤维表现出良好的荧光性能。同时从XRD分析中得知当荧光剂的浓度增加会使结晶度逐渐降低,引起纤维的机械性能的降低;此外,荧光剂的浓度对荧光再生纤维素纤维的热稳定性能影响不大。采用共混与阻燃后整理两种改性联用方式制备阻燃/荧光复合功能再生纤维,探究该制备工艺下对其纤维的性能影响。研究发现:复合功能纤维与阻燃纤维的极限氧指数相差不是很大,阻燃/荧光复合功能纤维仍然具有良好的阻燃性能和热稳定性能;即使荧光强度低于荧光纤维,但是复合功能纤维仍然保持着良好的荧光性能。水洗测试发现:水洗实验对复合纤维的阻燃性能具有一定的影响,且水洗后阻燃性仍能优于阻燃共混纤维,但是需要通过优化条件来提高其阻燃的耐水性能;而水洗实验对复合材料的荧光性能基本没有影响。研究和制备复合功能纤维材料不仅可以提升再生纤维素纤维的性能与市场价值,同时可以拓宽林木生物质资源的应用领域。更多还原

【Abstract】 This paper mainly focuses on preparing a kind offlame-retardant/fluorescent compound functional regenerated cellulose material,and it can be applied in the fields of fire-fighting clothing and household wallpapers,and so on.In order to broad the utilization space of the cellulose products.In this paper,flame retardant and fluorescence modification of regenerated cellulose fibers were studied in the two-component ionic liquid system using flame retardant finishing modification and blending modification methods.Based on this,the flame-retardant/fluorescent composite functional regenerated fibers were preparedby a combination of two methods of blending and finishing,and the effect of the preparation process on the properties of the fiber was explored.Furthermore,the resistance of the composite functional fiber was also investigated by using water washing.The cellulose was modified by different flame retardant modification methods,and the influence mechanism of different flame retardant modification methods on the fiber properties was investigated,and the flame retardant modification method was optimized.The test results show that the limiting oxygen index of the flame-retardant finishing cellulose fiber can reach 35,showing excellent flame retardancy.At the same time,by observing the structure and morphology of different flame-retardant fibers,TGA and DSC analysis,it can be concluded that the flame-retardantfinishing fiber structure is superior to the blended flame-retardant fiber and has higher thermal stability;The flame-retardant mechanism of the fiber is mainly based on the cohesive phase flame-retardant mechanism;compared with other flame-retardant fibers,the mechanical properties slightly decrease.Fluorescence regenerated cellulose fiber was prepared by blending modification method.When the content of ZnS:Cu reaches 0.56wt%,the fluorescent particles begin to disperse uniformly in the fiber,exhibiting good fluorescence performance;at the same time,when the concentration of the fluorescent agent increases,the crystallinity gradually decreases,and due to the decrease of crystallinity,the fiber The mechanical properties also have an influence;and the concentration of the fluorescent agent has little effect on the thermal stability of the fluorescent regenerated cellulose fiber.Flame-retardant/fluorescent composite functional regenerated fibers were prepared by a combination of two methods of blending and finishing,,and the effects of the preparation process on the properties of the fibers were investigated.The study found that the limiting oxygen index of the composite functional fiber and the flame-retardant fiber is not significantly different,and the flame-retardant/fluorescent composite functional fiber still has good flame retardancy and thermal stability;even if the fluorescence intensity is lower than that of the fluorescent fibers,the composite function still maintains good fluorescence properties.The water washing test found that the experiment has a certain influence on the flame retardancy of the composite fibers,and the flame retardancy after water washing can still be better than the flame retardant blended fibers,but still need to be improved;while the experiment basically had no effect on the fluorescence properties of the composite material.The prepared composite functional fiber material not only can improve the performance and market value of the regenerated cellulose fiberbut also can broaden the application field of the forest biomass resource.更多还原