Can Electrostatic Charge Attract Dust in a Household Environment?

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Discussion Overview

The discussion centers on the feasibility of using electrostatic charge to manipulate dust in a household environment, specifically focusing on two contrasting applications: repelling dust from a hand-held tool and attracting dust to a charged surface. The conversation includes technical challenges, potential methods, and the practicality of these approaches.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested

Main Points Raised

  • One participant proposes the need for a small hand-held tool that can discharge electrostatic energy to dislodge dust from a filter screen, questioning the feasibility of such a design.
  • Another participant expresses skepticism about the practicality of dislodging dust that has already adhered to a surface, noting that the energy required to unstick it is significantly greater than that needed to attract floating dust.
  • A follow-up question seeks clarification on whether achieving this functionality would require large capacitors or if it could be feasible in a compact form.
  • One participant suggests that charging a surface could potentially repel dust that has gained the same charge, but acknowledges the difficulty depends on how the dust has adhered to the surface, mentioning factors like moisture and chemical bonding.
  • A different participant shares their interest in attracting dust particles to a constantly charged surface, expressing a lack of technical background and seeking guidance on how to achieve this.

Areas of Agreement / Disagreement

Participants express differing views on the feasibility of using electrostatic charge to manipulate dust, with some emphasizing the challenges of dislodging adhered dust while others explore the potential for attracting dust to charged surfaces. The discussion remains unresolved with no consensus on the effectiveness of the proposed methods.

Contextual Notes

Participants mention various factors affecting the effectiveness of electrostatic manipulation, such as the state of the dust (dry vs. wet) and the nature of its adhesion to surfaces. These factors introduce limitations and dependencies that are not fully resolved in the discussion.

Air2air
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What a great forum.

I'm prototyping a small hand-held 110V tool. I need to add an electrostatic discharge function to it. We have all seen the "Ionic filter" devices at Sharper Image, where the plates will charge and attract dust. This is the opposite functionality - I need to push dust away.

The discharge is needed to dislodge dust and other non-conductive debris that embeds in a filter screen. Just enough of a charge to kick dust and debris off of the surface of the screen. Can't use vacuum or any other method.

- Is it possible to get this functionality in a small enough size for a hand-held power tool?

- What are the best sources for electrostatic components?

Thanking you in advance!
 
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Sounds difficult, once the dust has stuck to a surface the energy needed to unstick it is much greater than the very small energy needed to attract randomly floating dust in the air.
 
mgb_phys said:
Sounds difficult, once the dust has stuck to a surface the energy needed to unstick it is much greater than the very small energy needed to attract randomly floating dust in the air.

Thanks mgb_phys. By difficult do you mean needing a gigantic bank of capacitors, or possibly small and hand-held? Or impossible?
 
Don't know - to charge something floating in the air you only need to induce a very small charge in something that is well insulated.
If you charge a suface then presumably any dust on the surface will gain the same charge and should be repelled, the difficulty is in how it has stuck on.
If it is dry and has no chemical affinity ( so it could be blown off with say a gentle breath) then it might be fairly easy, if it wet or has chemically bonded on then it might be impossible.

Surfaces are sometimes charged to prvent dust landing but I haven't heard of a surface being cleaned by being charged.
 
hi,
I've been reading the thread of your conversation around electrostatic dust and I'm actually trying to find a way to attract small dust particles in a household environment.
i have no physics and no engineering skills whatsoever so this is all new to me, but what i am wanting to do is have a surface with a constant charge (in order that it always collect and continue to collect), so that small particles that come within its field will stay stuck to it.
how do i do this??
any help would be much appreciated.
thanks
dane
 

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