| Autor: |
Li, Qinglei, Dai, Zhengguan, Shang, Dengkui, Yin, Chong, Du, Piyi, Wang, Zongrong, Zhou, Chunhua, Yin, Cailiu |
| Předmět: |
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| Zdroj: |
CrystEngComm; 10/14/2020, Vol. 22 Issue 38, p6407-6414, 8p |
| Abstrakt: |
A larger liquid–gas interface area during the carbonation process for preparing high-purity aragonite CaCO3 whiskers by using porous quartz stones was developed. The presence of plenty of open pores ranging from 0.02 to 0.20 mm inside the porous quartz stones could disperse CO2 gas in Ca(OH)2 suspension into tiny bubbles, with an average diameter ranging from 0.28 to 3.05 mm and a large liquid–gas interface area ranging from 3571.4 to 327.9 mm2, respectively, which could enhance the diffusion effect of CO2 molecules and the uniformity of carbonate ions in the system. Thus, a uniform and low supersaturation was obtained, improving the growth of CaCO3 whiskers. The prepared CaCO3 whiskers showed the highest purity of 99.7%. The formation mechanism of ultrahigh purity CaCO3 whiskers was also studied in detail. Then, the prepared CaCO3 whiskers were introduced into a PVC matrix to study their effect on the tensile strength of PVC, and the results showed that the tensile strength was enhanced by 46.4% with 5 wt% whiskers. This method provides an effective way to enhance the performance of inorganic crystals. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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