目的 在包装材料内表面有效构建超疏水性,提升材料超疏水性的机械耐久性,实现高稳定超疏水状态。方法 分析研究低压喷涂参数对微观结构以及材料疏水性能的影响,采用辊涂、低压喷涂以及不同参数设置,对比复合涂层液在包装材料内表面形成的疏水性能表现。结果 通过工艺参数调节,最终确定有效构建超疏水包装内表面的工艺参数：喷涂气压为1.6 bar（1 bar=100 kPa）、液压为1.2 bar,基材预热温度为60 ℃、加热板温度为100 ℃,喷涂距离为120 mm,在此条件下制备的超疏水表面水接触角稳定达 175 ° 以上,超疏水内表面耐冲击测试可达85滴,机械耐久性提升了15 倍。结论 气压高于液压可使涂层雾化与成膜效果最优,辅以加热调控可形成稳定微纳分级结构;低压喷涂较辊涂更适合超疏水包装内表面的高效构建,本研究成功实现高耐久、高稳定超疏水界面,达到提升包装抗黏附性能的研究目的 。
Abstract
The work aims to effectively construct superhydrophobicity on the inner surface of packaging materials, enhance the mechanical durability of material superhydrophobicity, and achieve a highly stable superhydrophobic state. The effects of low-pressure spray parameters on the microstructure and material hydrophobicity were investigated. Roll coating, low-pressure spraying, and different parameter settings were adopted to compare the hydrophobic performance of the composite coating solution formed on the inner surface of packaging materials. Through process parameter adjustment, the optimal process parameters for effectively constructing a superhydrophobic packaging inner surface were determined as follows: spray pressure of 1.6 bar (1 bar=100 kPa), hydraulic pressure of 1.2 bar, substrate preheating temperature of 60 ℃, hot plate temperature of 100 ℃, and spray distance of 120 mm. Under these conditions, the water contact angle of the prepared superhydrophobic surface stably reached above 175°, the impact resistance of the superhydrophobic inner surface reached 85 drops, and the mechanical durability was increased by 15 times. In conclusion, higher gas pressure than hydraulic pressure contributes to the optimal atomization and film-forming performance of the coating. With the assistance of heating regulation, a stable micro-nano hierarchical structure can be fabricated. Low-pressure spraying is more suitable for the efficient construction of superhydrophobic packaging inner surfaces compared with roll coating. This study successfully achieves a highly durable and stable superhydrophobic interface, meeting the research objective of improving the anti-adhesion performance of packaging.
关键词
超疏水 /
低压喷涂 /
表面微观结构 /
微纳结构 /
机械耐久性
Key words
superhydrophobic /
low-pressure spraying /
surface microstructure /
micro-nano structure /
mechanical durability
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