31 Porous materials

Make an object porous or add porous elements (inserts, coatings, etc.).
  • Drill holes in a structure to reduce the weight.

If an object is already porous, use the pores to introduce a useful substance or function.
  • Use a porous metal mesh to wick excess solder away from a joint.
  • Store hydrogen in the pores of a palladium sponge. (Fuel *tank* for the hydrogen car--much safer than storing hydrogen gas)
TRIZ principe 31


Is this principle frequently used?

This principle is rarely used with 47 instances in the matrix.

This principle is proposed to solve the following contradictions:

Click on a contradiction to explore it

1/15 1/19 1/21 1/23 1/26 1/31 8/36 13/21 14/23 15/1 16/26 17/23 17/37 19/1 20/23 20/26 21/1 21/13 21/27 21/30 23/5 23/6 23/8 23/14 23/17 23/20 23/22 23/28 23/29 26/1 26/16 26/20 26/30 27/21 28/23 29/23 30/21 30/26 30/35 31/15 31/36 33/8 34/4 35/30 35/32 37/8 39/5


The colour indicates the ranking of the proposed principle to solve the contradiction: 1st, 2nd, 3rd, 4th.
This ranking reflects the frequency of occurrence of the principle in the analysed patents for this type of contradiction.
When a principle appears in first position, it means that it is statistically the most used in the patents studied for this type of problem.