Engineer Process

ZHIHUA "JERRY" GUO, Ph. D.

Address: **** ***** **** *****, ********, OH, 43240

Phone: 614-***-****

E-mail: *******@*****.***

PROFILE

Development Engineer with hands-on experience in product innovation,

process optimization, and transition of new products / technologies into

mass production. Extensive and diverse experience in Chemical and Materials

Engineering (Polymers: plastics, polymer processing, extrusion, foams,

rheology; Ceramics: superabrasives; Nanocomposites; Supercritical fluid

technology; Thermodynamic modeling). Special expertise in:

. New Product and Process Design

. Process Consistency Improvement and Control

. Quality, Yield, and Capacity Improvement

. Design of Experiments (DOE) and Data Analysis

. Materials Characterization

. Project Management

. Technical Support to Manufacturing

. Training and Specification Development

TECHNICAL SKILLS

. Processing

Ceramic processing - powder preparation, pressing, sintering; Heat

treatment; Machining; Chemical processing - leaching, etching; Forming -

extrusion, blown film extrusion, molding, thermoforming.

. Characterization

Optical microscopy, SEM/EDS, AFM, XRD, XRF, Rheometry, DSC, TMA, TGA,

Thermal conductivity, Thermal stability, Mechanical property testing, Gas

permeability, Magnetic property testing.

. Analysis

Design of Experiments, ANOVA, Regression, Six Sigma Methodology.

. Computer

JMP, Minitab, Matlab, Origin; Fortran, Gambit, Fluent, SuperPro, Lotus

Notes, Access, Excel, Powerpoint, Frontpage, Word, Photoshop,

Dreamweaver, Flash, Authorware, 3D Max.

PROFESSIONAL EXPERIENCE

3/2008 - present Product and process development engineer, Technology

Department, Diamond Innovations (formerly GE

Superabrasives), Worthington, OH

. Developed a new high-end PCD (polycrystalline diamond) product (for gas

and oil drilling) with the potential to double the current market share.

. Process development, optimization, and control

o Led to transfer three new products from prototype to production to

achieve the desirable yield and performance. The three products

account for >50% revenue for the oil and gas drilling product line.

o Improved ~10% yield for the major product lines by enhancing process

consistency and optimizing design parameters which translated into ~5M

savings for FY2009.

o Solved two yield crises (FY2008 & FY2009) in a timely manner.

o Collaborated with cross-functional team to set key performance metrics

for process control.

o Qualified new processes and instruments for critical manufacturing

steps.

9/2003 - 3/2008 Graduate research associate, William G. Lowrie Department

of Chemical and Biomolecular Engineering, The Ohio State

University, Columbus, OH

. Polymer nanocomposite foaming

o Developed new extruded foam products with environmentally benign

carbon dioxide (CO2). This green technology combined with

nanotechnology showed promises in mass production due to the

obligatory phase-out of freons and their derivatives by 2010.

o Explored and elucidated the effect of different forms of carbon, e.g.

graphite, activated carbon, carbon nanofibers, and carbon nanotubes,

as additives in polymer foaming. These additives are promising

candidates for industrial application due to their unique and

exceptional properties.

o Developed a new process to investigate polymer foaming dynamics and

acquired bubble nucleation and growth rates, the most important

parameters in polymer foaming.

o Made a major breakthrough in understanding the mechanism of polymer

foaming with an innovative approach to solve one of the most complex

problems in foaming process - calculation of nucleation energy.

o Initiated research on gas permeability of polymer nanocomposites and

foams and elucidated the effects of nanoparticles and foam morphology

on permeability.

. High pressure rheology

o Revealed the rheological behavior of polymer nanocomposites under high

pressure CO2 by measuring shear viscosity with a state-of-the-art

setup.

o Predicted temperature, pressure, and concentration shifting factors

successfully from the experimental viscosity data.

. Thermodynamic modeling

o Modeled phase boundaries of polymer-diluent systems by adoption of PC-

SAFT equation of state (EOS).

o Advanced understanding of polymer foaming by bridging classical

nucleation theory (CNT), experimental nucleation data, and phase

diagrams in polymer-diluent systems.

o Predicted important parameters experimentally inaccessible for better

understanding the mechanism of polymer foaming process.

EDUCATION

The Ohio State University, Columbus, OH

Ph.D. in Chemical Engineering (GPA: 3.9/4.0) 3/2008

Thesis: Experimental Analysis of Polymer Nanocomposite Foaming Using

Supercritical Carbon Dioxide

Advisors: David L. Tomasko and L. James Lee

Beijing University of Chemical Technology, Beijing, China

M. S. in Applied Chemistry (GPA: 3.7/4.0) 6/2003

Thesis: Statistical Thermodynamic Modeling and Computer Simulation in Phase

Equilibria of Real Fluids

B. S. in Fine Chemicals (GPA: 3.9/4.0) 6/2000

JOURNAL PAPERS AND BOOK CHAPTERS

. Z Guo, SK Yeh, MJ Wingert, JL Ellis, DL Tomasko, and LJ Lee, "Comparison

of Nanoclay and Carbon Nanofiber Particles on Rheology of Molten

Polystyrene Nanocomposites under Supercritical Carbon Dioxide", Journal

of Applied Polymer Science, 2010, 116 (2), 1068-1076

. Z Guo, J Yang, MJ Wingert, DL Tomasko and LJ Lee, "Comparison of Carbon

Nanofibers and Activated Carbon on Carbon Dioxide Foaming of

Polystyrene", Journal of Cellular Plastics, 2008, Vol. 44, No. 6, 453-468

. Z Guo, LJ Lee, and DL Tomasko, "CO2 Permeability of Polystyrene

Nanocomposites and Nanocomposite Foams", Ind. Eng. Chem. Res., 2008, 47

(23), 9636-9643

. Z Guo, H Yan, and C Zhang, "Computer Simulation of the Motion State of

Unidimensional and Two-dimensional Particles in the Phase Space of

Statistical Thermodynamics", Computers and Applied Chemistry (Jisuanji Yu

Yingyong Huaxue), 2004, 21(2), 309-313

. Z Guo, C Zhang, "MCAI Courseware for the Statistical Thermodynamics of

the Vibration of Polyatomic Molecule", Computers and Applied Chemistry

(Jisuanji Yu Yingyong Huaxue), 2002, 19(6), 789-792

. Z Guo, C Zhang, "MCAI Courseware for the Statistical Thermodynamics of

Polyatomic Molecule---Internal Rotation of Polyatomic Molecule",

Computers and Applied Chemistry (Jisuanji Yu Yingyong Huaxue), 2001,

18(5), 519-522

. DL Tomasko, Z Guo, "Supercritical Fluids", in Kirk-Othmer Encyclopedia of

Chemical Technology (5th Edition); John Wiley & Sons, Inc.: N.Y., N.Y.,

Vol. 24, 1-29, 2007

. J Yang, SK Yeh, NR Chiou, Z Guo, T Daniel and LJ Lee, "Synthesis and

Foaming of Water Expandable Polystyrene-Activated Carbon (WEPSAC)",

Polymer, 2009, 50 (14), 3169-3173

CONFERENCE PROCEEDING PAPERS

. Z Guo, MJ Wingert, SK Yeh, DL Tomasko and LJ Lee, "Comparison of Carbon

Nanofibers and Nanoclay on Rheology of Polystyrene Under Supercritical

Carbon Dioxide", Annual Technical Conference - Society of Plastics

Engineers, 66th, 2008

. Z Guo, J Yang, MJ Wingert, J Shen, DL Tomasko and LJ Lee, "Comparison of

Carbon Nanofibers and Activated Carbon on Carbon Dioxide Foaming of

Polystyrene", Annual Technical Conference - Society of Plastics

Engineers, 65th, 3062-3065, 2007

. Z Guo, MJ Wingert, J Shen, LJ Lee, and DL Tomasko, "Foaming Dynamics of

Immiscible Polymer Blends", Annual Technical Conference - Society of

Plastics Engineers, 65th, 3016-3021, 2007

. Z Guo, LJ Lee, and DL Tomasko, "CO2 and Water Vapor Permeability in

Polymer Nanocomposites and Foams", Annual Technical Conference - Society

of Plastics Engineers, 65th, 3109-3114, 2007

. A Burley, Z Guo, L Feng, DL Tomasko, I Kusaka, KW Koelling, and LJ Lee,

"A Scaling Approach for Understanding Nucleation in Polymer Foaming",

Proceedings of the 9th International Symposium on Supercritical Fluids,

Arcachon, France, 2009

. DL Tomasko, Z Guo, A Phoebe, K Kinsteadt, I Kusaka, KW Koelling, and LJ

Lee, "Analysis of Dynamics in CO2 Foaming of Polymers", proceedings of

SPE's Foams 2008 conference, 2008

. J Yang, SK Yeh, Z Guo, Z Cai, LJ Lee, NR Chiou and T Daniel, "Synthesis

and Foaming of Water Expandable Polystyrene-Activated Carbon Composites",

Annual Technical Conference - Society of Plastics Engineers, 66th, 1013-

1018, 2008

. DL Tomasko, KW Koelling, I Kusaka, LJ Lee, Z Guo, S Kumar and A Burley,

"Scalable Nanomanufacturing of High-performance Polymer Foams", NSF CMMI

(Civil, Mechanical and Manufacturing Innovation) Engineering Research and

Innovation Grantees and Research Conference, Knoxville, TN, 2008

INVITED JOURNAL REVIEWER FOR

. Macromolecules

. Polymer Engineering & Science

. Journal of Cellular Plastics

. Journal of Applied Polymer Science

. Machining Science and Technology

. Journal of Manufacturing Processes

SCHOLARSHIP AND AWARDS

. Award for Significant Contribution to the Society and the Plastic

Industry (2007)

. University Fellowship (2003-2004)

. Excellent Graduate Student (2003)

. Excellent Student Leader (2001-2002)

. Excellent Individual of Social Activities (2001-2002)

. Bayer Scholarship (1997-1998 & 2001-2002)

. Dow Chemical Scholarship (1999-2000)

. Renmin Scholarship (1996-1997 & 1998-1999)

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