NDLI: Sensitivity Testing Revisited: The Case of Sol-Gel Transition

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Omegna, Federica Genta, Gianfranco Emanuele, M. Barini Daniele, L. Marchisio Levi, Raffaello
Copyright Year	2008
Abstract	Classical sensitivity testing addresses mainly problems where the level of one stimulus only governs an abrupt transition in output, or response. Both parametric and nonparametric methods developed, and successfully applied over last century to tackle such problems, provide estimates of critical levels beyond which an item will either respond, or not, to a single stimulus, and of related statistics. However classical methods sometimes may not readily provide an answer, namely when more than one stimulus may reach critical level, and either singularly or jointly trigger transition. Factorial and response surface designs, adequate when dealing with continuous responses, may not perform as well for transition threshold estimation. A practical case at hand in chemical engineering concerns the production, through hydrolysis of a specific precursor, of titania sols and gels that find industrial use as additive for paints, concrete and other building materials due to its optical, photo-catalytic and super-hydrophilic properties. Particles formation and aggregation — controlled by varying the primary process parameters, namely initial alkoxide concentration, water to alkoxide and acid to alkoxide ratios, mixing conditions — may yield either stable, transparent nanometric sols, or monolithic gels, where aggregation of nanometric particles produces a final ceramic object. Depending on the application, one of the two products may be desirable, and therefore it is crucial to control the final product properties. Aggregation kinetics and physical properties of sols, and sol to gel transition, were found to depend strongly upon several factors, that is water to alkoxide initial concentration ratio, acid to alkoxide initial concentration ratio, and their interaction. The approach developed in order to estimate parameters pertaining to transition, and related uncertainty, is presented in the paper, and discussed in the light of experimental results.
Sponsorship	International
Starting Page	555
Ending Page	561
Page Count	7
File Format	PDF
ISBN	9780791848388
DOI	10.1115/ESDA2008-59091
e-ISBN	0791838277
Volume Number	Volume 4: Fatigue and Fracture; Fluids Engineering; Heat Transfer; Mechatronics; Micro and Nano Technology; Optical Engineering; Robotics; Systems Engineering; Industrial Applications
Conference Proceedings	ASME 2008 9th Biennial Conference on Engineering Systems Design and Analysis
Language	English
Publisher Date	2008-07-07
Publisher Place	Haifa, Israel
Access Restriction	Subscribed
Subject Keyword	Water Transparency Uncertainty Sensitivity analysis Building materials Chemical engineering Statistics as topic Ceramics Response surface methodology Sol-gel processing Concretes Particulate matter Paints
Content Type	Text
Resource Type	Article

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

Application of response surface methodology for optimization of nano-TiO$_{2}$ preparation using modified sol–gel method

Sol-gel synthesis of oxide particulate ceramics

Hydrophobicity optimization of polypropylene hollow fiber membrane by sol–gel process for CO$_{2}$ absorption in gas–liquid membrane contactor using response surface methodology

Modeling and optimization of densification of nanocrystalline Al$_{2}$O$_{3}$ powder prepared by a sol–gel method using response surface methodology

Platinum Supported Mesoporous Silica Spheres by Optimized Microfluidic Sol-Gel Synthesis Scheme

Synthesis of high surface area nanocrystalline anatase-TiO$_{2}$ powders derived from particulate sol-gel route by tailoring processing parameters

High water solubility and sol–gel transition behavior of titania nanoparticles obtained by an in situ functionalization sol–gel process

The effects of processing parameters on structure of mesoporous γ-alumina granules synthesized by sol-gel/oil-drop method: Modelling via response surface methodology

Sol-Gel Processing for Optical Communication Technology

Sensitivity Testing Revisited: The Case of Sol-Gel Transition

Similar Documents

Application of response surface methodology for optimization of nano-TiO$_{2}$ preparation using modified sol–gel method

Sol-gel synthesis of oxide particulate ceramics

Hydrophobicity optimization of polypropylene hollow fiber membrane by sol–gel process for CO$_{2}$ absorption in gas–liquid membrane contactor using response surface methodology

Modeling and optimization of densification of nanocrystalline Al$_{2}$O$_{3}$ powder prepared by a sol–gel method using response surface methodology

Platinum Supported Mesoporous Silica Spheres by Optimized Microfluidic Sol-Gel Synthesis Scheme

Synthesis of high surface area nanocrystalline anatase-TiO$_{2}$ powders derived from particulate sol-gel route by tailoring processing parameters

High water solubility and sol–gel transition behavior of titania nanoparticles obtained by an in situ functionalization sol–gel process

The effects of processing parameters on structure of mesoporous γ-alumina granules synthesized by sol-gel/oil-drop method: Modelling via response surface methodology

Sol-Gel Processing for Optical Communication Technology

Sensitivity Testing Revisited: The Case of Sol-Gel Transition