High flowability and dispersibility fillers for compounds. Application of nano silica (ADMANANO)

Transcription

1 213/9/4 Admatechs Co., Ltd R&D Division High flowability and dispersibility fillers for compounds Application of nano silica (ADMANANO) Admatechs Co., Ltd.

2 Features of uniformly dispersible nano silica, ADMANANO Features 1. Nano silica which has 1nm average diameter 2. Perfect dispersion for primary particles with simple mixing 3. Controlled surface by special treatment Particle size distribution/sem image ADMANANO dispersion to glass fiber 5μ m 1nm ADMANANO dispersion to organic substance Solvent: MEK Silica loading: 5wt% ADMANANO powder + Solvent Simple shaking Excellent dispersion without dispersant 1

3 Effect of ADMANANO Effect for other fillers Powder flowability is improved by small adding of ADMANANO. ADMANANO acts like a ball bearing between main particles. ADMANANO blocks contacts of each particles and reduces agglomerations. Powder ADMANANO 2

4 Total Energy mj Feed rate g/min Effect for spherical filler Application for submicron silica ADMAFINE Silica is spherical silica which has submicron particle size. Submicron fillers have high aggregability and difficulty of stable feeding. Nano Silica can improve the flowability and feedability of fillers. Powder flowability Equipment : Powder Rheometer FT4 (Malvern Instruments) ADMAFINE Silica Torque ADMAFINE Average particle size :.5um Feedability ADMAFINE with Nano silica Product number : SC2G-SQV (includes.6wt% of Nano silica) with Nano silica with Nano silica Powder Tip Speed mm/s Flowability is improved by Nano Silica. Force 8 ADMAFINE Silica 4 Equipment: Screw feeder Time Flowability is improved by Nano Silica. 3

5 Viscosity Pa.s Effect for organic filler/ Improvement of flowability in resin Application for PTFE powder PTFE powder is used for molding compound, sliding material, flame retardant and additive for paint, but to disperse to resin is quite difficult. Nano silica can improve the flowability of PTFE and the viscosity of compound is decreased. Viscosity of PTFE dispersed resin PTFE 2nm PTFE with Nano silica 2nm PTFE:3μ m diameter Resin:Epoxy Filler content:3wt% Addition of Nano silica:.5wt% against PTFE with Nano silica PTFE Shear Rate 1/s Compound viscosity is decreased dramatically. 4

6 Total Energy mj Shear Stress kpa Effect for organic filler/improvement of powder flowability Application for PTFE powder Powder Flowability Shear stress 3 25 Equipment: Powder Rheometer FT4 (Malvern Instruments) PTFE:3μ m diameter Addition of Nano silica:.5wt% 1 8 Equipment: Powder Rheometer FT4 (Malvern Instruments) PTFE:3μ m diameter Addition of Nano silica:.5wt% 2 15 PTFE Torque 1 Force with Nano silica 5 Powder PTFE with Nano silica Share Stress Powder Normal Stress Tip speed mm/s Applied Normal Stress kpa Flowability is improved by Nano silica Frictional force is decreased by Nano silica 5

7 Viscosity Pa.s Viscosity Pa.s Effect for fiber/improvement of flowability in resin Application for Glass fiber Resin rheology (fiber length is 7μ m) Resin rheology (fiber length is 3μ m) GF Resin: Epoxy Filler content: 5wt% Nano silica ratio:.2wt%(against GF) 2 GF+Nano silica 2 GF 1 Resin: Epoxy Filler content: 5wt% Nano silica ratio:.2wt%(against GF) Shear rate 1/s 1 GF+Nano silica Shear rate 1/s Nano silica can reduce the viscosity of resin compound with GF. 6

8 Effect for fiber/improvement of defiberization of chopped strand Application for chopped strand GF GF or GF+Nano silica GF+Nano silica + + Mixing in kneader GF:Fiber length 3mm Rotation of blade:5rpm Mixing time:1min Addition of Nano silica:.2wt% Sample weight: 5g Nano silica can control the electric statics Charge potential GF : 2kV GF+Nano silica :.8kV Nano silica can improve the defiberization 7

9 Total Energy, mj Viscosity Pa s Effect for fiber/improvement of powder flowability and resin rheology Application for Carbon fiber Powder Flowability Resin rheology Equipment: Powder Rheometer FT4 (Malvern Instruments) Fiber length: 4μ m Nano silica ratio:.5wt%(against CF) Torque Powder Fiber length: 4μ m Resin: Epoxy Filler content: 45wt% Nano silica ratio:.5wt% (against CF) CF 3 CF CF+Nano silica Air Air Velocity, mm/s The powder flowability is improved 1 5 CF+Nano silica Shear rate 1/s The resin viscosity is decreased dramatically. High filler loading is possible. 8

10 Viscosity Pa s Viscosity Pa s Effect for pigment Application for TiO2 Rheology of resin compound Application for modified TiO TiO 2 TiO2:.25um Resin: Liquid epoxy Filler content: 55wt% Nano silica ratio:.5wt% (against TiO 2 ) TiO2:.25um Resin: Liquid epoxy Filler content: 6wt% Nano silica ratio:.5wt% (against TiO 2 ) TiO 2 +Nano silica Shear Rate 1/s 4 Modified TiO 2 2 Modified TiO 2 +Nano silica Shear Rate 1/s Nano silica can control the resin viscosity increase and improve the filler content. Nano silica can be applied to modified TiO2. Compound viscosity would be decrease. 9

11 Effect of submicron silica with nano silica Submicron Silica has an improvement in warpage, filler orientation and filler content of fiber. Submicron Silica added ADMANANO has high flowability and easy to mix with fiber. ADMANANO can control the viscosity increase in resin. Submicron Silica ADMANANO Fiber 1

12 Viscosity Pa.s Viscosity Pa.s Effect of submicron silica with nano silica for fiber Application for fiber ADMAFINE with Nano silica Resin rheology with GF Fiber length: 3μ m Resin: Epoxy GF content: 3wt% Resin rheology with CF 4 3 Fiber length: 4μ m Resin: Epoxy CF content: 45wt% Product number : SC2G-SQV 15 GF 2 CF 1 5 GF+1% SC2G-SQV (against GF) Shear rate, 1/s Total filler content is 32wt% 1 CF+.5% Nano silica (against CF) CF+1% SC2G-SQV (against CF) Shear rate 1/s Total filler content is 47wt% Submicron Silica also can decrease viscosity of resin compound dramatically. High filler loading is possible and that delivers improvement of mechanical strength of resin compound. 11

13 Product line for compounds Product name Product number Form D5 Surface treatment Application ADMANANO SILICA YM1B-SP3 Powder 1nm Phenyl silane GF, CF, CB, PTFE, etc. YM1B-SM1 Powder 1nm Methacryl silane UV cure.resin ADMAFINE with ADMANANO SC2G-SQV Powder.5μ m SQ GF, CF, etc. It is possible to use SC2G-SQV separately and the high formability like to be needed in optical components would be gained. 12