Development of gas selective membranes for intra-ruminal capsules

Prof. Kourosh Kalantar-zadeh RMIT University - Meat & Livestock Australia

Type: Research Paper
Knowledge level: Advanced

Farm Table says:

The outcomes of this project are significant for the Australian agriculture and farming industries as measuring farming gas species are instrumental in assessing  productivity and greenhouse emissions

What is the problem?

The first step in addressing methane emission from ruminants is to develop an accurate, selective and reliable procedure for measurement of the gas, especially in animals under normal grazing conditions.

This project is designed to develop membranes for an intra-ruminal capsule used to measure changes over time in the concentrations of gases released from the stomach of animals.


What were the key findings?

The incorporation of nanomaterials into membranes were shown to be important due to the following
aspects :

(1) They can block selected harmful gas species such as H2S that naturally reduce the lifetime of sensors by corroding their components;

(2) They can tune the permeation of gas towards the desired gas species and hence more accurate sensing with the transducers can be obtained and

(3) The antibacterial functionality of the nanomaterials can keep the surface of the membranes clean to allow the
accurate and consistent passage of the gasses through the membranes for a longer period.

This project achieved all its milestones in producing nanostructured membranes and assessing them.

It was demonstrated that incorporating nanomaterials allowed the permeation tuning for different gas
species while keeping the surface of membranes clean for a long time. This helped in establishing both in
vivo and in vitro gas sensing systems for more accurate performance and longer lifetime.

Final comment

More work should be done regarding the test of the capsules with their incorporated membranes

2015 - Australia - Prof. Kourosh Kalantar-zadeh RMIT University - Meat & Livestock Australia
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