Principles of. November 2 3, 2015 Malmö Sweden. Turning Turso, Malmö Sweden

Transcription

1 Principles of WETTING, SPREADING & ADHESION and SOME OF THEIR APPLiCATIONS Malmö Sweden Turning Turso, Malmö Sweden

2 PRINCIPLES OF WETTING, SPREADING & ADHESION AND SOME OF THEIR APPLICATIONS Malmö Sweden This course is held for the 5 th time. Course outline General Introduction to Wetting, Spreading and Adhesion Description of wetting and spreading at equilibrium and dynamic conditions. Industrial examples are given where wetting and spreading are applied. Description of particle deposition and adhesion with industrial examples. The concept of contact angle Equilibrium thermodynamic argument and the Young s equation. Adhesion tension and the work of adhesion and cohesion. Spreading of liquids on surfaces Harkin s concept of spreading coefficient. Contact angle hysteresis and sliding of drops on inclined surfaces. Reasons for hysteresis; surface roughness and surface heterogeneity. Critical surface tension of wetting and the role of surfactants Zisman s approach and its thermodynamic basis. Measurement of the critical surface tension of wetting. The role of surfactant adsorption. Measurement of contact angles The sessile drop method. Wilhelmy plate technique. Liquid rise at a vertical plate. Tilted plate method. Capillary rise method. Dynamic process of adsorption and wetting Adsorption kinetics and the role of Marangoni effects, dilation and compression. Adsorption kinetics from micellar solutions. Experimental techniques for studying adsorption kinetics Drop volume method. Maximum bubble pressure method. Application in spray formulations Agrochemicals, personal care and paints. Interactions at the air/solution interface and their role in droplet formation. Kinetics of surfactant adsorption. Droplet impaction and adhesion. Theory of bouncing and droplet adhesion. Droplet sliding and retention. Wetting and spreading and definition of the spread factor. Deposition of particle on surfaces Role of interparticle interactions: van der Waal s attraction and double layer repulsion (or attraction). Application in hair sprays, hair conditioning, foundation, creams and lotions. Role of polymers and polyelectrolytes on particle deposition Applications in personal care and cosmetics. Effect of nonionic, anionic and cationic polymers on particle/surface deposition. Particle surface adhesion Short range forces and calculation of the force of adhesion. Surface energy approach to adhesion. Experimental methods for measurement of particle deposition and adhesion. Role of particle deposition and adhesion in detergency Definition of detergency: Wetting, removal of dirt and liquid soiling. Prevention of redeposition of dirt. Application of polymers and polyelectrolytes.

3 Course description Wetting is important in many processes both industrial and natural. In many cases, wetting is an essential prerequisite for application, for example in paint films, crop sprays, cosmetics, pharmaceutical tablets and in preparation of suspensions. Both equilibrium and dynamic processes of wetting are important in coatings. The spreading of liquids on substrates is also an important phenomenon as for example in agrochemical applications and in film coatings. The subject of particle/surface adhesion is important in a number of technological and biological applications, e.g. detergency, paper manufacture, water purification, flotation, fibre manufacture, cell adhesion and attachment, cell separation, bacterial adhesion to tooth surfaces, marine fouling and phagocytosis. The two day course addresses the fundamental principles involved in many of the above processes. Several lectures are given on the thermodynamics of wetting and the concept of contact angles and their measurements, the concept of critical surface tension of wetting and the role of surfactants and the dynamics of the wetting process. Application of these concepts in spray formulations such as those encountered in agrochemicals, personal care and paints will be discussed in a separate lecture. The second part of the course deals with particle deposition and particle/surface adhesion. The forces responsible for particle deposition are discussed and some of their applications in hair sprays, hair conditioning, foundation, creams and lotions. The role of polymers and polyelectrolytes on particle deposition is described, with particular emphasis on application in personal care and cosmetics. This is followed by a lecture on particle surface adhesion that is governed by short-range forces. The theories of particle adhesion are discussed and the methods that can be applied to measure particle deposition and adhesion are briefly described. The role of particle deposition and adhesion in detergency is discussed in a separate lecture. The above course is valuable for chemists and chemical engineers involved in the processes of wetting, spreading and adhesion in the following industries: Pharmaceuticals, Agrochemicals, Paints, Paper coatings, Dyestuffs, Cosmetics and Detergents. It will provide the candidate with fundamental understanding of the phenomenon involved and its application.

4 Course lecturer Prof. Tharwat Tadros Tharwat F. Tadros obtained his Ph.D in 1962 at Alexandria University after which he was appointed to a lectureship in Physical Chemistry at that university. Between he spent a sabbatical leave in the Netherlands to continue his research in colloid and interface science. Between he worked at I.C.I. and ZENECA to lead a group of fundamental research in Colloid and Interface Science. He reached the highest scientific appointment of Senior Research Associate. In the mean time he was appointed visiting professor at Imperial College (London), Bristol and Reading Universities. In these 25 years he carried out research in various fields of surfactants, polymer adsorption and stability, emulsions, nanoemulsions, microemulsions, concentrated dispersions and rheology. He supervised many Ph.D students and postdoctoral research fellows. In 1992 he was elected President of the International Association of Colloid Scientists (IACIS). Tharwat Tadros is the author, or a co-author, of around 290 published papers. He has edited nine books, and authored seven other books: Surfactants in Agrochemicals (1994), Applied Surfactants (2005), Colloids in Agrochemicals (2009), Colloids in Paints (2010), Rheology of Dispersions (2010) and Dispersions of Powders in Liquids (2012), Formulation of Disperse Systems (2014). He was editor of two series published by Wiley-VCH: Colloid and Interface Science Series (6 volumes set, published in ) and Topics in Colloid and Interface Science (3 volumes, ), as well as of the book Self-Organized Surfactant Structures (2011). In 2013 he edited the Encyclopaedia of Colloid and Interface Science that was published by Springer in Germany. He has been Editor-in-Chief for Colloid and Surfaces A and for Advances in Colloid and Interface Science (both published by Elsevier). Since leaving ZENECA, Tharwat Tadros worked as a consultant for various industries and has taught several courses in his specialized fields. He is still co-supervising many Ph.D. students at various Universities. Due to his distinguished research he was awarded two medals by the Royal Society of Chemistry (UK).

5 Course Fee and Payment Course Time Table EUR 1680 EUR 1480* * Discounted fee: is valid for two or more enrolments from the same company, at the same time, for the same course. And for enrolments from Universities and.government Institutes. The course fee includes: Tuition, copies of all Power Point presentations, certificate and meals. Two lunches, beverages at breaks and course dinner the first day. VAT (Moms) will be added for applicants domicile in Sweden. The registration will be confirmed with a course schedule and some practical information..we will send an Invoice to the amount of the Course Fee. Accommodation is not included in the course fee. Course Location and Hotel The course is held at Radisson BLU Hotel, Malmö Sweden To obtain the reduced price for accommodation, reservations must be made through Calmia. Weekday nights SEK 1395 (about EUR 150) for a single or double room per night incl. breakfast and VAT. Nights between Saturday/Sunday/Monday SEK 950 (about EUR 103) for a single or double room per night incl. breakfast and VAT. Radisson BLU Hotel Östergatan Malmö, Sweden Tel Transport Information Copenhagen Airport, Kastrup, is the nearest international airport. There are trains running several times each hour (20 min. journey) from Copenhagen Airport to Malmö Central Station. The course location is only 5 10 min. away from the station in Malmö. The airport bus from Malmö Airport, Sturup, stops outside the station in Malmö. Day 1: Registration 08:30 08:45 Day 2: The course ends 16:00 16:30 How to register On-Line registration Mail A Registration Form can be printed from each PDF-file Registration must be made before October 2, 2015 Substitutions are allowed at any time from the same company or institute. Cancellation No refunds will be made for those who do not attend the scheduled course and/or cancel after October 2, Questions General questions contact: Mrs G Tånge-Henderson calmia@calmia.se tel: +46-(0) For Scientific questions please contact: Prof. Tharwat Tadros Tharwat@Tadros.fsnet.co.uk

6 Registration Form Registration before October 2, 2015 Please print! The number of participants is limited. I wish to attend the course: Principle of WETTING, SPREADING & ADHESION and some of their applications Malmö Sweden Reserve on my behalf accommodation at the Radisson BLU Hotel in Malmö From (date) To (date) Number of nights: Single room Double room Late arrival (after 18:00) The hotel bill should be paid directly to Radisson BLU Hotel on the day of departure Surname Given Name Job Title Ms Mr Company/Institute Address Country Tel/fax Purchase Order number (If required by your company) Invoice address if different from the one above: