Li Zhi tugged on the rubber tire of the bicycle on the top of the torch held by his own soldier and nodded happily. Pen, fun, and www.biquge.info

This rubber tire has a very good elastic skin, even if it is baked by torches, it still retains elasticity, and it can be regarded as a qualified vulcanized rubber.

Natural rubber becomes soft when heated, hardens and brittle when cold, is not easy to form, easy to wear, soluble in organic solvents such as gasoline, has double bonds in the molecule, is easy to add reaction, and is easy to age. For rubber to be of practical value, it must be vulcanized.

After Li Zhi obtained natural rubber, he immediately set up a rubber laboratory to conduct vulcanization experiments.

In order to produce this vulcanized rubber, Li Zhi really spent a lot of work.

The difficulty lies in the preparation of the vulcanizing agent "carbon disulfide".

The preparation of this carbon disulfide requires methane and sulfur, and the reaction temperature is 500~700 degrees Celsius. Methane and sulfur are readily available, so Li Zhi built a biogas digester to collect methane and get the raw materials he needed. The key is the catalyst silicic acid, which took Li Zhi a lot of effort.

The preparation of silicic acid requires sodium silicate and hydrochloric acid, which is planted with hydrochloric acid. However, this sodium silicate needs to be produced separately. Li Zhi opened another production workshop, which specially mixed river sand and soda ash together and heated to 1400 degrees to produce sodium silicate.

After obtaining silicic acid, Li Zhicai used silicic acid as a catalyst to produce carbon disulfide. Then carbon disulfide was used as a vulcanizing agent to produce vulcanized rubber.

As an industrial designer, Li Zhi certainly knows the theoretical procedures of rubber vulcanization. But it's not that simple to put into practice. Li Zhi hired dozens of polytechnic graduates in the rubber lab to do repeated experiments, and it took three months to really master the feasible vulcanization procedure.

However, after picking up this qualified vulcanized rubber, Li Zhi immediately felt that all the tossing and groping were very worthwhile.

Rubber is an indispensable raw material for modern industry and can be said to be a strategic material.

Rubber can be used as wire sheaths, medical infusion hoses, and as sealing materials and cushioning materials in various machinery. The most direct use is the production of tires.

Because of its simple structure, horse-drawn carriages can also be made of wood tires. Anyway, no matter how it is bumped, the body structure of the carriage will not be upside down. But if it's a car or a bicycle, it can't withstand the bumps of a wooden tire. Steel-framed machinery can be shaken out in bumps and lose its original function.

Li Zhi had previously trial-produced bicycles.

With today's industrial level of Fanjiazhuang, the production of bicycles is more than enough. Whether it is the casting of steel column shells or the production of cushion springs, whether it is the production of wheel bearings or transmission chains, Fanjiazhuang's lathes can be easily completed.

However, the bike with wood-hulled wheels was too bumpy to use. Not to mention that people can't stand this kind of bumps, and the bike itself can't stand it. After riding more than 100 times, the fragile joints of the bike will fall apart due to bumps.

Therefore, Li Zhi had already built a bicycle, but because he did not have rubber tires, he could only put the wooden-wheeled bicycles he produced on the shelf.

And now, after the Navy's transportation halfway around the world, and through the efforts of the rubber laboratory, Li Zhi finally obtained vulcanized rubber and made tires from this vulcanized rubber.

Li Zhi waved his hand and said, "Okay, put the tires on!" ”

The craftsmen shouted the order and loaded the rubber tires onto the bikes.

A bicycle in the modern sense appeared in front of Li Zhi.

In front of dozens of civil and military officials, Li Zhi stepped on the bicycle, then stepped on the pedal, and rode the bicycle around on the cement school field.

Li Zhi laughed, and the faster he rode, the faster he rode.

Watching Li Zhi ride easily on the bicycle, dozens of officials were stunned. They were amazed that the two-wheeled bicycle would not fall down when riding, and they were amazed that the bicycle could ride so fast, and that the king riding on the bicycle rode easily and comfortably, and seemed to be effortless.

The officials seemed to have seen a wonderful stunt performance and cheered loudly one by one.

"Good!"

"The king is mighty!"

"Good!"

Li Zhi slammed the brakes and stopped amid the cheers of everyone.

Parking the bicycle on the school grounds, Li Zhi looked at the ministers and asked, "Everyone, how is this bicycle?" ”

"Wonderful! It's wonderful! ”

"Wonderful!"

"The invention of the king, the magic of extreme creation!"

Li Huan, the son of the world, is already a handsome teenager. He stood aside and looked at it for a moment, surprised and delighted. He stared at the bike with a look on his face that wanted to go up and give it a try.

Li Zhi looked at Li Huan and said with a smile: "Okay, Li Huan, you come and give it a try." ”

Li Huan suddenly smiled, bowed to Li Zhi, and stepped on the bicycle.

Li Zhi waved his hand and asked Gao Ligong, director of the Department of Industry, to help Li Xing hold the car and prevent Li Xing from falling.

With the support of Gao Ligong, Li Xing began to spin around the school field non-stop. After riding three laps, Li Xing suddenly accelerated, shook off Gao Ligong, who was supported by him, and rode quickly forward.

The crowd of onlookers suddenly let out an exclamation.

Li Huan got rid of the shackles of Gao Ligong, rode faster and faster, and moved quickly on the school field, as if riding a horse, which attracted the shouts of the onlookers of civil and military officials.

"Be careful!"

"Don't hurt the prince!"

Everyone was shouting, and when Li Xing turned the corner, his hand suddenly shook, and he fell to the ground with a thud.

The officials were dumbfounded, and immediately seven or eight people rushed up to see if the prince had fallen. Gao Ligong, who couldn't catch up behind him, rushed up quickly, his face turned white with fright, and he knelt on the ground with a plop, shouting: "Shizi! Shizi, you didn't get hurt, did you? ”

Li Huan was wearing a spring coat, and the clothes were full of two layers, but he didn't hurt the flesh and skin, patted the dust and got up, and said with a smile: "I'm fine!" This bicycle is really amazing, it can drive so fast, it is almost up to the speed of the war horse. ”

Li Zhi walked up and drank, "Li Huan, how can you ride so fast?" ”

Li Huan arched his hand and said: "Erchen was attracted by this superb bicycle, and he rode fast before he knew it. ”

Li Zhi smiled, turned his head to Gao Ligong and asked, "Gao Ligong, you have been in and out of the South Seas overseas and have the most extensive knowledge, how about this bicycle?" ”

Seeing that Li Huan was not injured, Gao Ligong's worried heart was put down, and he replied: "Your Majesty, this bicycle is exquisite. The minister thought that with this bicycle, the people could ride bicycles to and fro! In the future, from Fanjiazhuang to Tianjin Acropolis, you can ride this kind of car! ”

Gao Ligong waved his hand and said: "This bicycle is not like a horse, it does not need forage and bean feed, and the cost is much lower than raising a horse!" ”

"If the people in the countryside had such a car, it would be very convenient to get in and out of the town, and they would no longer be able to walk for one or two hours as before."

Li Zhi smiled and said, "Not only is it a good thing for the peasants, but it is also a sharp weapon for the soldiers to march and fight!" ”