我们为什么发展航天?先从一片纸尿裤说起

太空精酿,著有《啤博士的啤酒札记》

今天是#2019 中国航天日# 关于我们为什么搞航天,其实没必要总是谈星辰大海、探索宇宙奥秘、人类起源这些宏大的,就谈个小的,婴儿纸尿裤。

我最近在带新生儿,相信很多带过娃的新手爸妈、甚至很多没有娃但可以脑补的朋友,都知道这个小东西真是太重要了!太重要了!太重要了!

新生儿一天要换纸尿裤十几次,如果还是洗尿布,现代人会崩溃的,而纸尿裤就是航天反馈人类的一个小细节。

早期的载人航天中,远不像今天的飞船那么豪华酷炫空间大,宇航员基本都是“大象塞进冰箱”的状态,极其拥挤,很难自由活动。而无论是地面测试还是在轨飞行任务,都面临着一个很大的问题:宇航员毕竟是人,需要吃喝拉撒,吃喝好说,最难解决的就是拉撒问题。

飞船要进入真空,测试都是需要完全密封的,操作一次很麻烦。宇航员好不容易进去了,再随意出来上个厕所,很不现实。在太空环境中,更不现实。

阿波罗登月时代,一套登月服就 120 公斤左右,穿上和脱下它需要以小时计,极其麻烦。中间回去上个厕所,是不可能的。后来的航天飞机和空间站时代的各种出舱行走,动辄持续数小时,也不可能憋着或上厕所。

其实如果有了宇航员纸尿裤,一切就迎刃而解了。这个逻辑很简单,但在航天发展早期时却并不存在这种产品。美国航天第一人阿兰谢帕德执行任务时就面临尴尬,由于在地面准备和等待时间过长,根本没机会上厕所,他进入太空之后真的憋不住尿裤子 / 宇航服了。

1963 年,NASA 花重金研制出了太空收集尿液装置,俗称尿袋,算是纸尿裤的前身。后来开始逐渐升级。阿波罗登月时,为减轻飞船返回重量,在月球上扔下了近百个这种“屎尿垃圾”。里面的微生物,从理论上讲,通过人类而也“征服了月球”。

有个著名的华裔工程师叫唐鑫源,他加入 NASA 后的一个重要贡献,就是研制出了今天版本的宇航员纸尿裤,在 80 年代就能轻松吸水 1.4 升以上,足够宇航员执行 10 小时任务。

随着 NASA 大规模推广这项应用,且无专利或版权保护啥的,很多商家也看到了商机。这种产品迅速在大众中推广开来,最重要的应用场景莫过于婴儿纸尿裤了。

其实还有很多应用亦是如此。养娃中常用的耳温计、各种快速测量血压 / 血糖装置、记忆枕,都是被航天需求推动下变得成熟而进入大众生活。

航天,真的在让生活变得更美好。

发帖时间: news

关于 “我们为什么发展航天?先从一片纸尿裤说起” 的 93 个意见

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