三、纳米包装材料制备的关键技术１．通常，纳米微粒（膜）的制备方法包括：物理法、化学法和膜模拟法。物理制备方法主要涉及到蒸发、熔融、凝固、形变和粒径缩减等物理变化过程，具体包括：粉碎法、蒸发凝聚法、离子溅射法、冷冻干燥法、电火花放电法、爆炸烧结法等，化学制 Third, the key technology of nano-packaging materials 1. In general, the preparation of nanoparticles (membranes) include: physical, chemical and membrane simulation. The physical preparation method mainly involves physical changes such as evaporation, melting, solidification, deformation and particle size reduction, and includes the following steps: grinding method, evaporative aggregation method, ion sputtering method, freeze drying method, spark discharge method, explosion sintering method Chemical