The online course, part of the AOCS Continuing Education Program, will be informative and interactive to ensure that you learn, and more importantly, remember what was presented and include live participant Q&A. In addition to the live instruction and Q&A, attendees will have access to a full replay of the course for two weeks following the live course dates.
A certificate will be provided to attendees of the entire course.
Live Broadcast Schedule
(sold as one package/event)
- Monday January 24, 2022- 12:00 Noon -3:00 pm CST (Chicago, USA; UTC-6)
- Thursday January 27, 2022- 12:00-3:00 pm CST (Chicago, USA; UTC-6)
- Friday January 28, 2022- 12:00-3:00 pm CST (Chicago, USA; UTC-6)
Lamellar gel network (LGN) emulsions have a unique bilayer microstructure and viscoelastic properties that find broad application in skin care products, cosmetics, hair conditioners, hair dyes and relaxers.
This three-day AOCS continuing education program course will provide a detailed overview of the science and technology of these commercially important materials. The course will highlight the LGN model developed by our course instructor Ricardo Diez and demonstrate its use to design key aspects of cosmetic and personal care emulsions, from sensorial properties to stability and scale-up, as well as delivery of actives.
The first day will provide an in-depth description of the physical chemistry of the raw materials used to make emulsions. The materials are divided in the categories of emollients, emulsifiers, and structuring agents.
The second day will introduce the LGN model and highlights its key components, and describe the techniques used to build the lamellar structures responsible for the sensorial and stability properties of LGN emulsions. A detailed description of instrumental techniques for characterization of emulsion structure will be provided.
The third day will build on learning from the first two days, presenting formulations with different sensorial properties, as well as the scale-up process. The long-term stability of emulsions, and specifically the rules offered by the model to obtain long term stable products, will be studied in detail.
Day 1: The physical chemistry of the key raw materials used to make emulsions
- Physical chemistry of main categories of emulsifiers
- Discrete, oligomeric and polymeric emulsifiers.
- Crystalline vs. amorphous. Performance differences
The Water Phase
- Free vs trapped water. Differences and practical implications
The Oil Phase
- Carbon and silicone-based emollients
Day 2: Introduction to the LGN model
- Overall description of the LGN Model. What it is, and what it is not.
- Application of the model to formulation, including design of sensory properties, stability and scale-up of emulsions
- The LGN model vs the HLB Griffin model.
- The LGN Model vs. emulsions with ‘liquid crystals”
Seeing and Feeling the LGN
- Experimental techniques to build networks with different properties
- Instrumental techniques for characterization: XRD, DSC, Microscopy, TGA, Polarimetry
Day 3: Formulations - controlling the sensorial aspects of emulsions
- Gel vs crystalline formulations.
- Model formulations
- Intermediate formulations
- Advanced formulations for multiple performance attributes
Formulations for Delivery of Actives
- The delivery of water vs non-water-soluble actives
- How to deposit the active on the right spot of the skin
- Quantifying the delivery of the active
- From lab to pilot plan to production under the guidance of the LGN model
- Avoiding product differences in the scale-up process
- How the LGN model predicts product stability
- Stability testing results vs. actual long-term stability
- Physical vs chemical stability.
- Monitoring stability with instrumental techniques
AOCS Members: $289
AOCS Student Members: $169
One connection per registration please.
About the Instructor
Ricardo Diez, Ph.D
Ricardo Diez, Ph.D. is currently an Adjunct Professor at Rutgers University where he teaches two cosmetic science courses in the Master of Business and Science.
He has more than four decades of experience in consumer product companies and raw material manufacturers in the cosmetic industry. (Procter and Gamble, Chanel, Miranol, Stepan and Witco.) He has direct, hands-on experience in the synthesis, identification, and manufacturing of many of the materials used to make emulsions.
He has spent many years developing and investigating emulsion using the Lamellar Gel Network Model with a variety of identification techniques. He also has practical experience in the development and use of nano and microemulsions.
Policies and System Requirements