There is a common saying that paper can't hold fire. It can be seen that paper is flammable. However, Shanghai scientists invented a kind of “fire-resistant paperâ€. Experiments have confirmed that such paper can withstand high temperatures of over a thousand degrees Celsius. According to reports, this “fire-resistant paper†was successfully developed by the Shanghai Institute of Ceramics, Chinese Academy of Sciences, which took six years to complete. The result was also published in “European Chemistryâ€.
Fireproof paper has many uses Compared with ordinary paper, the production principle of "refractory paper" is similar, but the production materials are different. It not only can be used as a permanent and secure information storage medium to store important texts, documents, files, etc. for a long time, but also can be used as a regenerable adsorbent, controlled-release carrier, bone defect repair material, and medical treatment for effective removal of organic pollutants from wastewater. Paper, fire-retardant materials and high-temperature materials.
Zhu Yingjie, a researcher at the Shanghai Institute of Ceramics, said: "Hydroxyapatite is a natural mineral. It is the main inorganic component of vertebrate bones and teeth. It has excellent biocompatibility and environmental friendliness. The white color, which has the excellent characteristics of long-term storage and easy discoloration, is conducive to the long-term preservation of paper documents. However, hydroxyapatite also has its drawbacks - high brittleness and low toughness.
Through repeated experiments, Zhu Yingjie’s research team finally found a new method of preparation: using calcium oleate as a precursor to prepare ultra-long hydroxyapatite nanowires that can be precisely regulated, and used it as a building material for new types of paper. The hydroxyapatite "fire-resistant paper" was prepared using a simple vacuum filtration technique.
At present, this kind of highly flexible hydroxyapatite "refractory paper" is still limited to laboratory-scale preparation, but in the future if it can achieve large-scale production and use, Zhu Yingjie believes that it can not only drastically reduce human to traditional plant fibers. The dependence of plain paper can also reduce environmental pollution to a certain extent, so as to benefit future generations.
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