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SUMMARY:Studying the early stages of CaCO3 formation using a microfluidic 
 spray dryer
DTSTART:20180517T164000
DTEND:20180517T170500
DTSTAMP:20260513T020115Z
UID:1224019baf0a4781be20a42ce37359d15f48d3154db3d7434c7baa6c
CATEGORIES:Conferences - Seminars
DESCRIPTION:Huachuan Du - EPFL STI IMX Soft Materials Laboratory (SMAL) 
 \nAbstract  Calcium carbonate (CaCO3) is one of the most abundant biomin
 erals that nature often uses as a structural material because of its excel
 lent mechanical properties. Inspired by nature\, a lot of work has been de
 voted to produce CaCO3-based materials. The key to gain a better control o
 ver the mechanical properties of CaCO3-based materials is to have a better
  understanding of formation mechanism of CaCO3. Here\, we produce amorphou
 s CaCO3 (ACC) particles using a microfluidic spray-drier that quenches th
 e formation of CaCO3 within 100 ms to 10s. This fast quenching enables st
 udying the evolution of the structure and composition of ACC particles tha
 t form during early stages without the need for any external quenching age
 nts. We show that the amount of mobile water of ACC particles increases wi
 th increasing formation time and hence with increasing particle size. As a
  result\, larger particles are less stable than smaller counterparts. Thes
 e insights into the influence of the formation time of ACC on the quantity
  of mobile water contained in them and their stability might open up new o
 pportunities to fabricate biomimetic CaCO3-based materials with tunable st
 ructures.\n\nBio Huachuan Du is studying his PhD in Prof. Esther Amstad
 ’s group where he uses the microfluidic spray-drying technique to study 
 the crystallization process. He obtained his master degree in the Material
 s Science and Engineering section at EPFL in 2015. Prior to that\, he did 
 his bachelor in Chemical Engineering at Harbin Institute of Technology in 
 China and Pohang University of Science and Technology in South Korea.
LOCATION:MED 0 1418 https://plan.epfl.ch/?room==MED%200%201418
STATUS:CONFIRMED
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