1. Television?
The birth of television is one of the greatest inventions of mankind in the 20th century. In modern society, life without television is unimaginable. Black-and-white and color TVs of various models and functions are flowing from assembly lines into factories, schools, hospitals and homes around the world, miraculously changing people's lives rapidly. ?
2. Nylon?
American organic chemist Carothers used adipic acid and hexamethylenediamine as raw materials to prepare polymers in 1935. Because these two The components all contained 6 carbon atoms and were called polymer 66 at the time.
He melted the polymer and pressed it out through an injection needle, and stretched it under tension to become a fiber. This fiber is polyamide 66 fiber. It was named Nylon after it was industrialized in 1939. It is the earliest synthetic fiber variety to achieve industrialization.
3. Plastic?
In the 1860s, the United States was short of raw materials for making billiard balls due to insufficient ivory supply. In 1869, the earliest artificially manufactured plastic celluloid was patented. Although celluloid is the earliest artificially made plastic, it is an artificial plastic, not a synthetic plastic. The first synthetic plastic was made by heating and molding phenolic resin. It was made by the Belgian-American chemist Backlund in 1910 at the beginning of the 20th century.
Extended information:
Science and technology in the 20th century also included the following inventions:
1. Airplane
December 17, 1903 , the world's first manned powered aircraft took to the skies in Kitty Hawk, North Carolina, USA. This aircraft is called "Aviator-1", and its inventor is the American Wilbur. Brothers Wright and Orville Wright. ?
2. Penicillin
The famous British bacteriologist Professor Alexander Fleming first invented the world-famous penicillin in 1928. Later, it was invented by the British pathologist Fleming. Further research by Lowry and German biologist Qiann improved it, and it began to be used clinically in 1941, and was gradually promoted in 1943.
Penicillin is recognized as the third major invention in World War II, along with the atomic bomb and radar. Penicillin marked a farewell to the era when humans had no specific drugs for bacteria and was a major breakthrough in the medical field. This also laid the foundation for a protracted war between humans and bacteria.