Graphene nanotubes for anti-static silicones: maintained color and mechanical performance

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TUBALL™ nanotubes provide stable anti-static performance to silicone compounds while retaining mechanical properties and minimally impacting the host matrix.

TUBALL™ graphene nanotubes are applied via the easy-to-use additive TUBALL™ MATRIX, which is a line of concentrates based on polymer carriers and pre-dispersed TUBALL™ graphene nanotubes.


TUBALL™ graphene nanotubes: Good performance on all key parameters

In contrast to other conductive agents, TUBALL™ graphene nanotubes are a versatile conductive agent offering good performance on all key parameters.

Parameter

Carbon black

Metallic
(paste form)

MWCNT

TUBALL™ MATRIX

Working dosage

10 wt.%

10 wt.%

3 wt.%

2 wt.%

Resistance requirements (Volume Resistivity)

105–107 Ω•сm

Resistance result (Volume Resistivity)

106–109 Ω•сm

105–107 Ω•сm

105–107 Ω•сm

105–107 Ω•сm

Black dots on surface

only black available

none

only black available

none

Available color range

none

limited

none

wide

Resistance remains stable after abrasion on surface

no

yes

yes

yes

Influence on mechanical performance

strong negative

strong negative

strong negative

none

Influence to rheology

strong negative*

negative*

strong negative*

none

Dust formation during production

yes

yes

yes/none
(in case of masterbatch)

none

‘Hot spots’
(resistance varies on surface)

yes

possible

possible

none

Stable resistance over time

no

yes

yes

yes

Longer life cycle of compound and moulded parts

no

no

no

yes

Carbon release on surface

yes

none

none

none

Cost of anti-static property

comparable

high

comparable

comparable

* Formulation design required (adjustment of curing system).

Key benefit 1: Colored anti-static compounds

The wide range of color options makes it possible to provide various parts to the market where anti-static properties are required.

Colored anti-static silicone rubber

Volume resistivity 103–105 Ω•cm. TUBALL™ loading 0.2–0.05%

Key benefit 2: Maintained mechanical and anti-static properties

TUBALL™ nanotubes, in contrast to traditional conductive agents, minimize the impact on compound elasticity and on tensile parameters, viscosity and rheological properties.

Mechanical properties of anti-static LSR with 4 wt.% TUBALL™ MATRIX 601


When using carbon black, because of the high concentration required (10% or more) and the spherical shape of the particles, a phenomenon known in the industry as “carbon release” takes place, where the conductive additive is present on the surface of the sample.

In contrast, graphene nanotubes, owing to their greater length-to-diameter ratio, are not released to the surface.

If materials will be used under conditions of deformation, it is important that stable resistivity is maintained. With TUBALL™ MATRIX, the resistivity is maintained below the target value even after stress-strain.

High dynamic pressure applications – Anti-static LSR with 1 wt.% TUBALL™ MATRIX 601

Key benefit 3: standard processing and mixing equipment

TUBALL™ MATRIX can be diluted into compounds through the use of standard silicone compounding equipment (2-roll mill, kneader). Other approaches for masterbatch dilution may be used provided that their mixing efficiency is sufficient.

More information about the key parameters for masterbatch dilution and compound processing can be found in the processing guidelines.


OTHER BENEFITS

  • Extremely low loadings of TUBALL™ that preserve properties
  • Ensure permanent and uniform electrical conductivity without “hot spots”
  • Maintain rheology of the uncured compound
  • Minimal influence on mechanical properties including softness

      TUBALL MATRIX for LSR, RTV

      601
      Tuball
      MATRIX 601
      Non-crosslinkable conductive additive for liquid silicones

      Application

      Elastomers

      Materials

      Silicones, LSR, RTV

      Carrier Media

      Polydimethylsiloxane

      MATRIX 601
      602
      Tuball
      MATRIX 602
      Crosslinkable conductive additive for liquid silicones

      Application

      Elastomers

      Materials

      Silicones, HCR, LSR, RTV

      Carrier Media

      Vinyl-terminated polydimethylsiloxane

      MATRIX 602

      TUBALL MATRIX for HCR

      602
      Tuball
      MATRIX 602
      Crosslinkable conductive additive for liquid silicones

      Application

      Elastomers

      Materials

      Silicones, HCR, LSR, RTV

      Carrier Media

      Vinyl-terminated polydimethylsiloxane

      MATRIX 602
      605
      Tuball
      MATRIX 605
      Crosslinkable conductive additive for HCR silicones

      Application

      Elastomers

      Materials

      Silicones, HCR

      Carrier Media

      Vinyl-terminated polydimethylsiloxane

      MATRIX 605

      Please pay close attention to processing guidelines for TUBALL™ MATRIX 601/602 for liquid silicones and processing guidelines for TUBALL™ MATRIX 605 for high consistency silicones


      Download PDF versions:
      PROCESSING GUIDELINES TUBALL MATRIX 601 602 ENG
      pdf
      6.39 MB
      PROCESSING GUIDELINES TUBALL MATRIX 605 ENG
      pdf
      3.65 MB

      Or watch video instruction:

      Conductive colored HCR: Processing guidelines for TUBALL™ MATRIX 605


      Application case

      Printing Rollers, Hoses, Jacketing
      click to view case
      Printing Rollers, Hoses, Jacketing

      Additional resources:

      Conductive Silicones - LSR, RTV, HCR and PSA

      Electrical resistivity guideline: measurement, standards & troubleshooting


      High-performance Rubbers and Silicones with Graphene Nanotubes


      A new era?


      Review of NAUM Nanoaugmented Materials Industry Summit 2018 in Shanghai



      Contact us to discuss your project specifications or to request a TUBALL MATRIX sample

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