The water absorbent material depends on how many times you need it. For example, water vapor generated by a general testing device can be used with an external water absorption device (lime, copper sulfate powder, silica gel, etc.), and absorbent cotton can be used to filter and absorb a small amount of moisture. in the reaction product.
The relatively cheap water-absorbing material currently used is water-absorbing resin, which has a high water absorption function that can absorb hundreds or even thousands of times its own weight, and has excellent water retention properties. Once it absorbs water, it swells. When it becomes a hydrogel, it is difficult to separate the water even if pressure is applied. Widely used in physiological hygiene products, such as women's sanitary napkins, diapers, multi-function nursing padsnnels, paper towels, pet pads, etc. After absorbing water, it can be dehydrated by heating and drying, and can be used repeatedly!
Can anyone tell me what is the difference between silicone hydrogel and hydrogel?
The hydrogel will not lose water if placed in the top refrigerator. The hydrogel layer contains 97% water, which will gradually evaporate during use. In experimental tests, a 5mm layer of hydrogel covered with a 5mm layer of airgel took 200 hours to "lose" all of its water, five times longer than it takes for a layer of Pure hydrogel to lose water.
How to make bubbles with nanogel
1. Different properties: Silicone hydrogel is an organic polymer material. Hydrogel is a type of gel with an extremely hydrophilic three-dimensional network structure.
2. DifFerent Characteristics: The hydrogel swells quickly in water and can hold a large volume of water without dissolving in this swollen state. Silicone hydrogel is hydrophilic and has a two-phase material structure.
3. Different uses: As a material with high water absorption and high water retention, hydrogel is widely used in a variety of fields, such as drought resistance in arid areas, facial masks in cosmetics, antipyretic patches and analgesia. Post etc. Silicone hydrogel is often used to make high-end contact lenses.
Detailed information:
1. Do not use silicone gel on unhealed or new wounds.
2. Do not use silicone gel on mucous membranes or too close to the eyes.
3. Do not use ap silicone gelIf you have used topical antibiotics or other topical medications.
4. Only use silicone gel on clean, dry skin.
5. Store below 25℃. Keep away from children. Do not use silicone gel after the expiration date indicated on the package.
Baidu Encyclopedia - Hydrogel
Baidu Encyclopedia - Silicone Hydrogel
1 Pour the nanogel into a container in the middle. 2. Put a thin tube into the nano glue. 3. Blow with your mouth to make bubbles.
When blowing bubbles with nano glue, the function of the hair dryer is to heat it. If there are other heating methods, you do not need to use the hair dryer. Nano glue is a new type of structural adhesive. Featuring a blend of thermal, electronic and mechanical properties, it is also more environmentally friendly and durable due to its lower hygrocopic and its better resistance to aging.
Reason: Nano glue is a very delicate colloid. She doesn't have a hair dryer and can't use a hair dryer to blow bubbles. .Solution: You can use other methods to blow bubbles, such as blowing with your mouth, or use a long thin tube, pour the nano glue into the tube, then blow with your mouth to blow out the bubbles.