A paper-based packaging material with improved air barrier and water vapor permeability (WVP) properties was synthesized based on layer-by-layer assembly consisted of poly(ethylenimine) (PEI)/graphene oxide (GO) on a filter paper substrate. The effect of the pH of GO suspension on the zeta potential and air permeability (AP) of the modified paper was investigated in detail. The results indicated that the pH of GO suspension resulted in significant difference in the AP of the modified paper. Compare with the pristine paper, the AP of the modified paper with (PEI/GO)₁₀ multilayer films synthesized at pH 2.5 decreased by 99.99 %, while the WVP increased by 15.82 %. The modified paper as packaging material could prolong the shelf-life of oyster mushroom, indicating the modified paper has huge potential application on the preservation of agricultural products.

基于由聚（乙烯亚胺）（PEI）/氧化石墨烯（GO）组成的层层组装，在滤纸基材上合成了具有改善的阻气性和水蒸气透过性（WVP）性能的纸基包装材料。详细研究了GO悬浮液的pH值对改性纸的Zeta电位和透气度（AP）的影响。结果表明GO悬浮液的pH导致改性纸的AP的显着差异。与原始纸相比，修改后的纸的AP（PEI / GO）为₁₀在pH 2.5下合成的多层膜减少了99.99％，而WVP增加了15.82％。改性纸作为包装材料可以延长牡蛎蘑菇的保质期，说明改性纸在农产品保鲜方面具有巨大的潜在应用价值。