纳米纤维素改性染料溶液及其染色单板耐光色牢度性能  

Nanocellulose Modified Dye Solution and the Light Fastness Performance of Dyed Veneer

作　　者：吕少一[1,2] 程明娟 张龙飞 盛时雄[3] 杨勇 詹先旭 LYU Shaoyi;CHENG Mingjuan;ZHANG Longfei;SHENG Shixiong;YANG Yong;ZHAN Xianxu(Research Institute of Wood Industry,Chinese Academy of Forestry,Beijing 100091,China;Co-Innovation Center of Efficient Processing and Utilization of Forest Resources,Nanjing Forestry University,Nanjing 210037,Jiangsu,China;DeHua TB New Decoration Material Co.,Ltd.,Deqing 313200,Zhejiang,China)

机构地区：[1]中国林业科学研究院木材工业研究所,北京100091 [2]林业资源高效加工利用协同创新中心,南京林业大学,江苏南京210037 [3]德华兔宝宝装饰新材股份有限公司,浙江德清313200

出　　处：《木材科学与技术》2024年第4期28-35,共8页Chinese Journal of Wood Science and Technology

基　　金：青年拔尖人才培养项目“木质衍生发光功能材料”(CAFYBB2023QA005)。

摘　　要：采用纳米纤维素晶体(cellulose nanocrystal,CNC)对红、黄、蓝三种酸性染料进行改性处理得到CNC改性染液,对其粒径分散性、Zeta电位、紫外-可见光吸收性能进行分析,并对染色单板的上染率、耐光色牢度、表面化学结构和微观结构进行研究。结果表明:经过CNC改性处理后的三种染料,分散均匀性和稳定性均得到改善。经CNC-1%改性后的染料,粒径降低,粒径分布均匀性和Zeta电位绝对值提高,紫外-可见光吸收强度下降;染色单板的上染率提高,耐光色牢度达到GB/T 15104—2021《装饰单板贴面人造板》4级要求;染色单板微观结构表面具有纳米纤维素与染料复合形成的纤丝状聚集体。较高添加量(CNC-4%)的CNC会增大对染料的吸附量,导致胶体颗粒增大,团聚情况增加,反而使粒径变大,Zeta电位绝对值降低,从而影响单板的上染率和耐光色牢度。Three acidic dyes were treated with nanocellulose to obtain well-dispersed nano-modified dye solutions.The dye solutions'particle size dispersion,Zeta potential,and UV-visible light absorption performance were analyzed.The dyeing rate,light fastness,surface chemical structure,and microstructure of the dyed veneer were evaluated.The results showed that the dispersion uniformity and stability of the three dyes after nano modification were improved.After CNC-1%modification,the particle size of the dye significantly decreased,the uniformity of particle size distribution and the absolute value of Zeta potential improved,and the UV-visible light absorption intensity decreased.The dyeing rate of the dyed veneer was enhanced,and the light fastness reached level 4 of“Decorative veneered wood-based panel”.The micro surface of the dyed veneer had fibrous aggregates formed by the combination of nanocellulose and dyes.Higher concentrations of CNC(CNC-4%)increase the adsorption capacity of dyes,leading to an increase in colloidal particles and aggregation,which in turn leads to larger particle size and the lower absolute value of Zeta potential,thereby affects the improvement of dye uptake and light fastness.

关 键 词：染料 染色单板 纳米纤维素晶体 分散性 耐光色牢度 

分 类 号：TS653.2[轻工技术与工程] TQ316.6[化学工程—高聚物工业]