第八百五十八章 自行车
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李植在亲兵手持的火把上方拉了拉手上的自行车橡胶轮胎，欣喜地点了点头。更多小说ltxsba.com
这个橡胶轮胎外皮弹性很好，即便是经受火把的烘烤，也依旧保持弹性，算得上是合格的硫化橡胶。
天然的橡胶受热变软，遇冷变硬、发脆，不易成型，容易磨损，易溶于汽油等有机溶剂，分子内具有双键，易起加成反应，容易老化。要使橡胶具有实用价值，必须对橡胶进行硫化。
李植得到天然橡胶后，立即组建了橡胶实验室，进行硫化实验。
为了生产这硫化橡胶，李植当真是花费了一番工夫。
难点在于硫化剂“二硫化碳”的制备。
这二硫化碳的制备需要甲烷和硫磺，反应温度500～700摄氏度。甲烷和硫磺倒是易得，李植专门造了一个沼气池收集甲烷，便得到了所需的原材料。关键是催化剂硅酸，花费了李植很大的功夫。
硅酸的制备需要硅酸钠和盐酸，盐酸李植有。不过这硅酸钠需要另外生产。李植又开了一个生产车间，专门用河沙和纯碱混合在一起，加热到1400度生产硅酸钠。
得到了硅酸后，李植才用硅酸做催化剂，生产出了二硫化碳。然后再用二硫化碳做硫化剂，生产出了硫化橡胶。
李植作为一个工业设计师，当然知道橡胶硫化的理论程序。但是真的实践起来也没有那么简单。李植在橡胶实验室中雇佣了几十个理工学院的毕业生反复做实验，花了三个月才真正掌握了可行的硫化程序。
不过当拿起这个合格的硫化橡胶后，李植立即觉得一切的折腾和摸索都是十分值得的。
橡胶是现代工业不可或缺的原材料，可以说是一种战略物资。
橡胶可以做电线外皮，可以做医疗用的输液软管，可以作为密封材料和缓冲材料用于各种机械中。而最直接的用途，就是生产轮胎。
马车因为结构简单，还可以使用木头轮胎。反正怎么颠也不会把马车的车体结构颠坏。但是如果是汽车、自行车，就无法承受木头轮胎的颠簸了。钢铁结构的机械会在颠簸中震坏，失去本来的功能。
李植此前就试制过自行车。
以如今范家庄的工业水平，生产自行车是绰绰有余了。无论是铸造钢柱外壳还是生产坐垫弹簧，无论是生产轮子轴承还是传动链条，范家庄的车床都能驾轻就熟，轻松完成。
然而使用木壳轮子的自行车太颠簸，根本没法用。且不说这种颠簸人受不了，自行车本身也受不了。骑上百余次，自行车的脆弱关节就会因为颠簸散架。
所以李植早就造出了自行车，却因为没有橡胶轮胎，只能把生产出来的木轮子自行车束之高阁。
而现在，经过海军越过半个地球的运输，经过橡胶实验室的努力，李植终于得到了硫化橡胶，用这硫化橡胶制出了轮胎。
李植一挥手，说道：“好，把轮胎装上去吧！”
工匠们大喊得令，将橡胶轮胎装到了自行车上。
一台现代意义的自行车出现在李植的面前。
几十名文武官员面前，李植跨上了自行车，然后脚一踩踏板，在水泥校场上骑着自行车打起转。
李植哈哈大笑，越骑越快。
看着李植在自行车上轻松骑行，几十名官员惊得目瞪口呆。他们惊得是这两个轮子的自行车居然骑起来不会倒下来，瞪的是这自行车居然能骑这么快，呆的是骑在自行车上的大王骑得轻松惬意，似乎毫不费力的样子。
官员们仿佛看到了一场精彩的特技表演，一个个大声叫好起来。
“好！”
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