producing micro size beads from alginate
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Producing micro-size beads from alginate. Principle and equipment. Principle. Alginate solution + divalent cations (Ca, Ba, etc.) = solidified matrix (gel-like material). If alginate solution is forced into a Micro- droplet shape, the result will be a micro- solid bead (sphere).

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Presentation Transcript
principle
Principle

Alginate solution +divalent cations

(Ca, Ba, etc.)=solidified matrix(gel-like material).

If alginate solution is forced into a

Micro-droplet shape, the result will

be a micro-solid bead (sphere).

if your experiment requires quantities of micro beads

…If your experiment requires quantities of micro-beads…

You will find production by hand very tiresome, especially when hard beads are needed when using highly viscous alginate solutions.

Some equipment is needed

equipment for producing micro beads 100 200 m m dia
Equipment for producing micro-beads (100-200 mm dia.)
  • This is essentially a metal sprayer with a very small nozzle.
  • Droplets form from the internal pressure and are solidified by the calcium solution.
in reality the device looks like this
In reality, the device looks like this.

Cartridge

Microbe filter

Bacteria culture +

alginate solution

Stirred plate

Air

compressor

Air filter

a look at the parts cartridge the heart of the system
A look at the parts; Cartridge, the “heart” of the system

Air inlet

Exit nuzzle

Copper tube

Bacteria culture +

alginate solution

filters keeps everything clean and non contaminated
Filters, keeps everything clean and non-contaminated

Standard microbe filter

Air flow

Metal tube filled with glass wool

Air flow

nozzle forms the microbeads
Nozzle forms the microbeads.

Micro-drop formation

Compressed air

formation of microbeads step by step
Formation of microbeads, step by step…
  • Clean, pressurized air stream sucks liquid from flask.
  • Micro-droplets exit from the narrow nozzle.
  • Micro-droplets are formed separately during trajectory into collection pan.

Stream of droplets

Bacteria culture +

alginate solution

and again from a different angle
And again from a different angle

Bacteria culture +

alginate solution

To the container

Stream of droplets

as the micro droplets hit the calcium chloride solution they immediately form micro beads
As the micro-droplets hit the calcium chloride solution, they immediately form micro-beads.

Rotary shaker (not shown) shakes container.

Stream of droplets

CaCl2

Micro-beads are formed instantly.

The usually transparent micro-beads were colored for this demonstration.

micro beads after formation
Micro-beads after formation

And, if you look at the circle close enough …

microphoto of micro beads attached to wheat seeds before sowing
Microphoto of micro-beads attached to wheat seeds before sowing.

Micro-beads

Wheat seed

Natural color

Artificially colored for demonstration

other applications

Other applications?

“The sky is the limit.”

Use your imagination.

some unexpected benefits
Some unexpected benefits:
  • Procedure requires very little human or electrical energy.
  • This is a new technology and described in respected scientific journals, so your “brilliant” paper will not be rejected for using an untried method.
  • As an environmentally-friendly technology, it will make you look good.
  • Production is fast, which gives you time for an evening at the movies or lounging in front of the TV.
  • Have fun…..
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