ZnCl2/纤维素溶液涂布增强纸基材料的阻隔性能和机械性能研究

Enhancing Barrier and Mechanical Properties of Paper-based Materials Through ZnCl2/Cellulose Solution Coating

关键词:  ZnCl₂/纤维素溶液  再生纤维素涂层  阻隔性能  机械性能

Key Words:ZnCl₂/cellulose solution  regenerated cellulose coating  barrier properties  mechanical properties

摘要:本研究利用与纤维素纸基材料纤维同质同源的天然纤维素对纸基材料进行涂布增强。结果表明，ZnCl₂/纤维素溶液能够在纸基材料表面形成一层致密的再生纤维素薄膜，显著改善了涂布纸内部及表面纤维间的界面结合，降低了涂布纸的孔隙率，促进了涂布纸表面结构的致密化，使涂布纸的阻隔性能和机械性能得到较大提升。与未涂布纸相比，涂布纸的透气度、水蒸气透过率和氧气透过率分别降低了99.8%（涂布量0.8 g/m²）、80.7%（涂布量0.2 g/m²）和86.2%（涂布量1.0 g/m²）；水接触角增大，Cobb值降低，水滴在涂布纸表面停留时间明显延长，表明涂布纸的疏水性能得到改善；同时，与未涂布纸相比，涂布纸（涂布量1.0 g/m²）的干抗张强度、湿抗张强度、耐破指数和内结合强度分别增加了76.9%、1 645.5%、48.7%和81.1%。

Abstract:This study utilized a natural cellulose homologous to paper fibers for coating enhancement of cellulose paper. The results showed that ZnCl₂/cellulose solution could form a dense regenerated cellulose film on the surface of paper， significantly improving the interface bonding between internal and surface fibers of the paper， reducing the porosity of the paper， promoting the densification of the surface structure， and greatly enhancing the barrier and mechanical properties of the coated paper. Compared to uncoated paper， the air permeability， water vapor permeability， and oxygen permeability of the coated paper decreased by 99.8% （coating weight of 0.8 g/m²）， 80.7% （coating weight of 0.2 g/m²）， and 86.2% （coating weight of 1.0 g/m²）， respectively， with the water contact angle increased， Cobb value decreased， and the water droplet stayed on paper surface for a significantly longer time， indicating an improvement in the hydrophobic properties of the coated paper. Furthermore， compared to uncoated paper， the dry and wet tensile strength， bursting index， and internal bond strength of the coated paper increased by 76.9%， 1645.5%， 48.7%， and 81.1%， respectively.