What you’ll learn:
- 液体保护对消毒剂的重要性。
- The flaws of traditional coating types such as conformal coatings.
- 通过纳米涂层技术保护液体保护的未来。
持续的共同199大流行意味着我们越来越成为一个更加健康意识的社会。结果，我们比以前更频繁地清洁个人设备，包括手机，电视遥控器和游戏机控制器。In fact, one recentstudyrevealed a staggering 92% of participants’ phones were contaminated with different types of bacteria.
额外的学习have shown that coronaviruses can persist on surfaces like metal, glass, or plastic for up to nine days. What’s more, 26% ofU.S. consumersnow clean their mobile phones daily, with a further 22% doing so at least once a week.
但是，除非采用适当的液体保护，否则用酒精和酸的消毒剂重复清洁设备可能会损坏设备。在P2I的一项研究中，有83％的电子产品设计师表示，任何没有液体保护的设备都将在一年内发生故障。那么，哪些可用的液体保护选项，哪些最适合电子设备？
液体保护对消毒剂的重要性
Alcohol- and acid-based products are the two main types of typical domestic disinfectant, making them the most likely to be used on household electronic devices. It’s important to understand how the composition of these disinfectants can lead to damage within devices that don’t benefit from liquid protection.
In alcohol-based disinfectants, ethanol or isopropyl alcohol (IPA) typically make up 70% to 90% of the product along with a quantity of water to slow their evaporation. Both alcohols are strong wetting agents with high polarity; thus, they have an increased ability to bond to other molecules, such as water. Water contains minerals and salts that create high water conductivity within the disinfectant. This, combined with the alcohol properties, can lead to damage in unprotected electronic products.
在家庭中发现的基于酸的常见消毒剂通常包含两种类型的酸之一：过氧化氢（H2O2) or hypochlorous acid (HCIO). H2O2and HCIO are both oxidizers, meaning contact with components within electronic devices will lead to corrosion and dendrite formation.
Acid-based disinfectants also typically contain much larger proportions of water than alcohol-based products to stabilize and dilate the corrosive properties of the product’s composition. Adding water to the disinfectant won’t completely cancel out the corrosive properties of the acid, though, it will only slow it down.
In all disinfectant types, residual water can penetrate device openings and short-circuit internal components. However, there are a number of device protection options to prevent damage from disinfectants.
The Flaws of Traditional Coating Types
一种传统的液体保护方法是设备内部组件上的共形涂层。共形涂料选项包括丙烯酸树脂，硅树脂，聚氨酯树脂和环氧涂层。虽然有益于保护设备免受不利环境条件的影响，但由于这些涂层被应用于厚度和质量不同的液态状态，因此组成和有效性可能会有所不同。
共形涂层的过度掩盖要求也使它们不适合用复杂的几何形状保护电子电路。此外，它们容易出现分层，并且需要持续维修。
机械密封是另一种传统的液体保护方法。选项包括铂治疗有机硅，氯丁橡胶，硅橡胶和EPDM橡胶。虽然广泛用于电子产品，但一些橡胶会散发出可能损坏电子电路的硫化蒸气。它们还捕获了微处理器和操作组件需要冷却的热量。最重要的是，他们可以随着时间的推移移动位置，从而降低其有效性。在回收设备时，将机械密封与主要零件分开可能是有问题的。
The Future of Liquid Coating
通过纳米涂层技术进行液体保护是科学驱动的创新。这项技术的范围从防溅剂应用到防止在水中完全淹没的设备。
Unique to only certain nano-coating applications, specifically those associated with pulsed plasma technology, is their ability to prevent liquids from wetting the surface or penetrating an enclosure via capillary action, ensuring they’re truly liquid repellent. Stripboards protected with this type of nano-coating technology also show a significant improvement in electrical resistance compared to uncoated stripboards in personal devices.
While conformal coatings and mechanical seals can be potentially unreliable over time, nano coatings are not only beneficial to the end user, but also for stakeholders across the value chain. By allowing the life of a device to be extended, nano coatings help reduce e-waste and meetincreased consumer demandfor sustainable products.
