Thermal insulation/cover for heating water bottle Answered
I am building a water bottle that can heat water inside up to 80 degree Celsius for my engineering project. The design of the bottle is as follows:
1. an aluminium or steel flask
2. heating coil at the bottom of the flask(for heating)
3. battery and circuit for the heating coil is located below the heating coil.
I want to design a cover such that a person can hold the bottle when the water is hot. Also, i want to protect the circuit and battery at the bottom from the heating coil. How can I do this? (As of now, i was thinking to spray polyurethane foam around the bottle and use a plastic cover. Also, using a polystyrene board below the heating coil to separate it from circuit board/battery).
Are there any other insulating materials that can be used? Considerations for cover and insulation: 1. Should be able to hold the bottle 2. Wash the bottle (hence, waterproof)