文献类型：期刊文献

英文题名：Preparation and characterization of self-suspended CaCO3 nanoparticles derived from scallop shells

作者：Wan, Yaochuang[1];Chen, Xuemei[1]

机构：[1]East China Univ Sci & Technol, Natl Engn Res Ctr Ultrafine Powder, Sch Chem Engn, Shanghai 200237, Peoples R China

年份：2023

卷号：44

期号：9

起止页码：1595

外文期刊名：JOURNAL OF DISPERSION SCIENCE AND TECHNOLOGY

收录：;EI(收录号：20220611598401);WOS:【SCI-EXPANDED(收录号:WOS:000747320900001)】；

语种：英文

外文关键词：Self-suspending; CaCO3 nanoparticles; cubic-like shape; scallop shell; calcium supplement

摘要：In this study, self-suspended CaCO3 nanoparticles (M-SCC) derived from thermal activated scallop shells were prepared through the hydration-carbonation reaction and surface modification with sodium hexametaphosphate (SHMP). The characterization results proved the successful synthesis and modification of cubic-like CaCO3 particles. Suspension stability of CaCO3 particles was improved greatly after modification. The effects of additive amount of SHMP, modification temperature and time on degradation of SHMP and interaction between SHMP and CaCO3 were discussed using settling height, particle size distribution, zeta potential and viscosity measurements, and the optimum modification sample (M-SCC-OP) with excellent suspension stability was obtained under the condition of 3.0% of SHMP, 55 degrees C and 40 min. Zeta potential results indicated that surface charge property of CaCO3 was changed from positive to negative, and low viscosity (6.62 mPa center dot s) for the suspension of M-SCC-OP (23.8 wt.%) further proved strong composite forces among particles. Compared with original CaCO3 particles, suspension rate in a dietary calcium simulation system was improved from 14.2% to 67.6%. This study may help to solve the problem of limited application of CaCO3 in granule products for low solubility and poor suspension stability.