# Presentation: 855017

## Particulate and Multiphase Processes (PMP) ProgramMarc Ingber, Program Director

**Particulate and ****Multiphase Processes **(**PMP**)** ****Program****Marc Ingber, Program Director**

**Notes:**
a.
b.  Includes particles, tubes, thin layers, other structures

## Current  Research  Focus

**Current****  Research  Focus**

**Fundamental research on transport phenomena **
**in dispersed and microstructured  systems**** **
****** ****MULTIPHASE FLOW PHENOMENA & MICROSTRUCTURED FLUIDS ****(20%)**
**     ******** ****bubble/droplet dynamics; particle-laden flows; multiphase flows **
**        **** ****in microfluidic devices;**
** **
**     ******** ****colloids, self and directed assembly**
****** ****PARTICLE TECHNOLOGY ****(25%)**
**     ******** ****Production of particles with engineered characteristics, unique composition, and **
**        **** ****surface properties; particle assembly into functional structures and devices**
****** ****GRANULAR SYSTEMS**** (25%)**
**                                         **
**     ******** ****Separation processes, force chains, modeling, DEM simulations, lubrication**
****** ****ENVIRONMENTAL****   (10%)**
**                                           **
**     ******** ****Processes leading to new technologies for environmental sustainability **
****** ****MULTIPHASE TRANSPORT IN BIOLOGICAL SYSTEMS  ****(20%)**
**  **
**     ******** ****Multiphase transport in biological systems with applications to clinical**
**        **** ****diagnostics and therapeutics**

**The following slides depict some typical PMP research efforts**

**Notes:**
a.
b.  Includes particles, tubes, thin layers, other structures

##  CAREER: Development of A Scalable Spin-Coating

** ****Technological Platform for Colloidal Self-Assembly **
** ****and Templating Nanofabrication**

**Shear-aligned **
**Colloidal crystalization**

**Peng Jiang – **
**University of Florida**

## Exploring the Fundamentals and 

**Applications of Pickering Emulsions**
**Lenore Dai  -  Texas Tech University**

****** ****Background**
**    **** ******** ****In contrast to conventional emulsions using surfactants**
**         ****as stabilizers, Pickering emulsions use solid particles**
**     **** ******** ****Provide a novel method to synthesize core-shell latexes**
**        **** ****through one-step Pickering emulsion polymerization**
****** ****Results**
**     **** ******** ****Successfully synthesized silica-polystryrene composite**
**        **** ****latexes using Pickering emulsions as a template**
**     **** ******** ****Inclusion of nanoparticles has a strong effect on the **
**        **** ****size distribution of the composite-latexes**
**     **** ******** ****Additional surfactants either inhibit nanoparticle **
**        **** ****interfacial assembly or even latex formation**
****** ****Impact**
**     **** ******** ****Noval and simple methods to synthesize functional **
**        **** ****particulates**
**     ******** ****Unique class of materials that have wide potential **
**        **** ****applications**

** ****SEM Images with X-ray Microanalysis**

## Controlling Segregation in Granular FlowsJoseph McCarthy – University of Pittsburgh

****** ****Segregation = Un-mixing**
**    **** ****  ****Industrial problems**
****** ****Uniformity issues**
****** ****Product failure/rejection**
****** ****Cohesion (top)**
****** ****Predict behavior (R, G, r)**
****** ****Dsurface: mix ->**
**   **** ****segregate**
****** ****Perturbations (bottom)**
****** ****Invert flow f>f****crit**
****** ****Design new**
**   **** ****mixers/equipment**
****** ****Impact: limit segregation **
**    **** **** ****in both cohesive and free-**
**    **** **** ****flowing systems **

** ****Cohesion**

** **
** ****Flow Perturbations**

## CAREER: Molecularly Directed Assembly of “Patchy” Particles

**Ilona Kretzschmar  -  The City College of New York**** **

**Background:**** Molecularly Directed Assembly**
** **
****** ****development of site-specific particle surface modification methods **
****** “****patchy” particles for molecularly directed assembly **
****** ****guidelines for binding energies, particle concentrations, and patch sizes**

**Results:**** Glancing Angle Metal Evaporation**
****** ****patch sizes as small as 3.7% of surface**
****** ****uses shadow effect of particles within layer**
** **
****** ****patches of different geometry obtainable**

**Impact:**
****** ****simple and reproducible method for patch **
**    ****generation**
****** ****geometry predicted by mathematical model **
****** ****minimum patch size - important input**
**    ****parameter for MD simulations**

**      ****Figure Caption:*****  *****a**)*** cross sectional view of evaporation set ***
***      ******up (Q = 2******o)******,  *****b**)*** experimental patches,  *****c**)*** computational ***
***      ******prediction of patch,  *****d**)*** particles responsible for patch***
***      ******formation, and  *****e**)*** view of patch from source position. ***