目的 研究液态金属改性氮化硼对无铝内衬纸水蒸气透过性能和导热性能的影响。方法 将氮化硼片通过液态金属改性后与聚乙烯醇复合制备功能涂层，涂敷到基纸表面，研究液态金属改性氮化硼的含量和涂层厚度对内衬纸的水蒸气阻隔性能和导热性的影响。结果 液态金属改性解决了氮化硼片团聚和基体/填料界面缺陷问题，能够进一步延长水蒸气扩散路径，降低水蒸气透过率，涂层厚度增加进一步延长扩散路径和降低了水蒸气透过率。此外，液态金属改性提升了热导率并降低了弹性模量。结论 文中使用功能涂层改善了传统无铝内衬纸的阻隔性和导热性，并降低了模量，有望给兼具柔性、阻隔性和凉感的纸张的制备提供借鉴。

The work aims to study the effects of liquid metal modified boron nitride on water vapor transmission and thermal conductivity of aluminum-free lining paper. The functional coating was prepared by the boron nitride filler nanosheets modified by liquid metal and then combined with polyvinyl alcohol. The effect of the liquid metal modification, the content of boron nitride filler and the coating thickness on the water vapor barrier property and thermal conductivity of the inner lining paper were studied. Liquid metal modification solved the problems of boron nitride filler nanosheet agglomeration and matrix/filler interface defects, and further extended the water vapor diffusion path and reduced the water vapor transmission rate. The increase of coating thickness further extended the water vapor diffusion path and reduced the water vapor transmission rate. In addition, the liquid metal modification increased the thermal conductivity and decreased the elastic modulus. In conclusion, the functional coatings improve the barrier and thermal conductivity of traditional non-aluminum lining paper and reduce the modulus, which is expected to provide reference for the preparation of paper with flexibility, barrier and cool feeling.