how the removal of starch with an alkali can be performed on soluble starch in alkali. proteins such as starch, PVA dal etc.. Starch can also terhidrolisa by strong alkali (sodium hydroxide), but it takes a long time, which is about 12 hours, split over 2 hours and 10 hours of soaking peram process. NaOH function to convert starch into sugar that dissolve in water.
laboratory test
tools and materials
- Gray cloth
- Water
- NaOH
- Scales
- Glass beaker
- Stick
- Measuring pipette
- Tool Heaters
recipes
- NaOH = 2%
- Temperature = 40
- Time = 12 hours
- Vlot = 1:30
job step
1. prepare equipment and materials
2. weigh fabric to be processed
3. calculate the water needs and NaOH according to the recipe
4. NaOH and water poured into the glass beaker to form a solution
5. heating the solution and insert the fabric into the solution and stirred
6. took the cloth from the solution after processing for 2 hours
7. do peram process of cloth wrapped by a plastic cloth
8. wash cloth to clean
9. after washing, the fabric is dried with direct sunlight
NaOH is not often used because it is not perfect and can not change the starch into sugar that dissolve in this process is air.hasil fabric becomes softer than the previous because the starch contained in the fabric is gone and absorbent cloth for the better.
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