纤维素纳米晶体对热升华转印纸涂层性能影响研究

Effect of Cellulose Nanocrystal on Coating Properties of Thermal Sublimation Transfer Paper

关键词:  羧甲基纤维素钠  SiO₂  CNC  热升华转印纸  色密度值

Key Words:CMC  SiO₂  CNC  thermal sublimation transfer paper  color density value

摘要:本研究通过酸水解法制备纤维素纳米晶体（CNC）悬浮液，将其加入SiO₂/羧甲基纤维素钠（CMC）涂料中，形成一种热升华转印纸生物基涂层。结果表明，CNC对SiO₂/CMC团聚具有一定的分散作用。与SiO₂/CMC涂层的热升华转印纸相比，CNC添加量为2.0%的SiO₂/CMC/CNC涂层的热升华转印纸纵、横向抗张指数分别提高了9.2%、9.3%，平滑度提高了31.9%，透气度下降了46.0%，油墨吸收值下降了3.4%、干燥速度提高了24.3%，承印物平均色密度值由1.01升高至1.21，油墨转移率由80.1%升高至88.5%。由此可见，CNC添加提高了热升华转印纸的机械和热转印性能。

Abstract:In this paper， cellulose nanocrystal （CNC） suspension was prepared by acid hydrolysis method and added to SiO₂/carboxyl methyl cellulose （CMC ） coating to prepare a bio-based coating for thermal sublimation transfer paper. The results showed that CNC had a certain dispersion effect on SiO₂/CMC agglomeration. Compared with SiO₂/CMC coated thermal sublimation transfer paper， the transverse and longitudinal tensile fingers of SiO₂/CMC/CNC coated thermal sublimation transfer paper with CNC content of 2.0% increased by 9.2% and 9.3% ， the smoothness increased by 31.9%， and the air permeability decreased by 46.0%. The ink absorption value decreased by 3.4% and drying speed increased by 24.3%， the average color density of substrate increased from 1.01 to 1.21， and the ink transfer rate increased from 80.1% to 88.5%. It could be seen that the addition of CNC improved the mechanical and thermal transfer performance of thermal sublimation transfer paper.