Thermoformable Conductive Ink: PowerPoint Presentation, PPT - DocSlides

Thermoformable Conductive Ink:Thermoformable Polymer Thick Film Transparent Conductor and its Use in Capacitive Switch Circuits

Brianna EvansJonathan KarkoskaNicholas MinerviniMorgan MostowEmily OlsenJulia SmithVictoria Taibe

ChE-345 Group 3 Final Project

2

The PatentConductive PTF circuits are used as electrical elements, but there are issues with conductivity and compatibility of substancesLayer of conductive ink is printed and dried on a substrate to produce a functioning circuit that is thermoformedCan be used on substrate of choice OR as part of capacitive circuit stack with silverTHERMOFORMING: subject to pressure & heat that deforms the circuit to its desired 3D characteristics

3Example 1

20 wt% Organic Medium 120 wt% Desmocoll 540 polyurethane80 wt% dibasic esters organic solventHeated at 90o C for 1-2 hours50 wt% ITO powder added to OM10.25 wt% printing additive 30 wt% Organic Medium 227 wt% PKHH polyhydroxyether resin73 wt% dibasic estersHeated & mixedCombined & heated 30 minutes on a planetary mixer; several passes on three-roll mill

Lines printed, dried, and thermoformed

4Overall Schematic

Resin 1

Resin 2

Solvent 1

Solvent 2

Organic Medium 2

Organic Medium 1

Conductive Powder

Product

A

B

C

D

E

5Model Specifications/Parameters

We assumed:steady stateConstant volume and density (overfill line)Incompressible liquids

Perfect mixingConstant specific heatMixing: observe how the flow rate affects the final concentration of the resin that was created while mixingHeating: the heat input will affect the final temperature of the final solutionUsing heat and mass balances we were able to derive a 1st order transfer function for the mixing and heating systems in the simulink modelTransfer Functions6

7Transfer Functions: Mixing

Mass Balance:Mole Balance:Linearized differential equation:Final Transfer Function:

8Transfer Functions: Heating

Steady State:1st LaPlace Transform:2nd LaPlace Transform:Input Temperature Constant:Final Transfer Function:

9

Model

10

Model - Mixing ProcessDisturbance

11Tuning

Controller Gain Delay Trials Displayed:1 5 10 20Controller Gain Chosen: 4.1

12Tuning - Integral Time Delay

Integral Time Delay Trials Displayed:.25 .5 1 3Integral Time Delay Chosen: 1.1

13Tuned Model Behavior - Step Disturbance Response

14Tuned Model Behavior- Random Disturbance Response

15

Model - Heating ProcessDisturbance

16Tuning Model Behavior

17Tuned Model Behavior

18Safety Features

Pre Start-Up Safety Review (PSSR)OverheatingSystem shuts down at a certain temperatureOverpressurizingSafety valvesLost power/airFail open/fail close valves

19Conclusions

LearningsExposure to patentsIndustrial applications of process modelingMaking reasonable assumptionsFurther DevelopmentSpecifications for equipment and instrumentsModel process to manufacture ITO powderOptimization and efficiencyQuestions?