SKU: 18243563504

Py-urea-COF(water uptake COF)

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Description

Py-urea-COF(water uptake COF)Product Name NamePy urea COFwater uptake COF: span> Product Overview The concept of Covalent Organic Frameworks (COFs) materials was first proposed in 2005 by Yaghi et al., aiming to develop a new class of porous materials with highly ordered structures and specific functions. COF is a kind of crystalline organic porous polymer material with periodic structure formed by strong covalent bond of light elements (such as C, H, O, N, etc.). COF is derived

Product Name

Name:Py-urea-COF(water uptake COF:/span>


Product Overview

 

The concept of Covalent Organic Frameworks (COFs) materials was first proposed in 2005 by Yaghi et al., aiming to develop a new class of porous materials with highly ordered structures and specific functions. COF is a kind of crystalline organic porous polymer material with periodic structure formed by strong covalent bond of light elements (such as C, H, O, N, etc.). COF is derived from the polymerization of small organic molecules. In order to meet the requirements of high crystallinity of COF materials, COF needs to continuously complete the recombination of covalent bonds in the polymerization process to form a long-range ordered crystal structure. Depending on the type of reaction, the main reactions to produce COF are: boric acid polycondensation (boron-oxygen bond), C-C coupling reaction (carbon-carbon bond), Schiff base reaction (imine bond), cyano-autopolymerization (triazine bond) and aryl ether polymerization (carbon-oxygen bond) reaction. Among them, CFS containing reversible boro-oxygen bonds, imine bonds and triazine bonds are the most common and widely used. The common methods of COF synthesis include solvothermal method, microwave assisted solvothermal method, mechanical force method, ionic thermal method and room temperature solution synthesis method.


Technical Parameter

 

Specific surface area: ~25.7 m2/g

Pore size:~17.88 nm

Product Features

 

Low density: composed of C, H, O, N, B and other lightweight elements, low density.

High specific surface area: provides a large number of active sites and adsorption sites.

Chemical modifiability: Functional modifications can be made through the design and selection of organic monomers.

Good thermal stability and chemical stability: can maintain structural stability in a certain temperature and chemical environment.

Excellent pore properties: conducive to gas adsorption, storage and separation.

 

Application Fields

 

Gas storage and separation: COFs is known as a new type of porous crystal material for gas storage due to its high inherent specific surface area, extremely low density, high stability and adjustable pore size, such as storing hydrogen, carbon dioxide and other gases, and achieving efficient gas separation.

Catalysis: As a catalyst or catalyst carrier, participating in various chemical reactions. For example, improving the efficiency and selectivity of the reaction in organic synthesis. Its insolubility and high stability make it easy to separate from the reaction mixture, and the catalyst has good reusability.

Energy storage: Used for lithium-ion batteries, supercapacitors and other energy storage devices. Improve battery charging and discharging performance and cycle stability.

Sensing: Detect various substances in the environment, such as gas molecules, heavy metal ions, etc. It can be used for pollutant detection in environmental monitoring.

Liquid phase adsorption separation: A large number of open channels, large specific surface area, easy access to binding sites and high chemical stability make COF an excellent material for liquid phase adsorption.

 

Related Information

Please e-mail for the detailed characterization data.

E-mail:[email protected]

 

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SKU: 18243563504

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Michael Marks
Louisville, US
★★★★★ 4
Like the sunscree - not the spray can
Style: SPF 50, Size: 6 Fl Oz (Pack of 2)
Sunscreen itself did a great job with our snorkeling and scuba diving. Long lasting and didn't rub off in spots where masks and other things can leave spots unprotected. However, the spray can itself was difficult. Even when being sure it was completely in the unlocked position, it would take me two thumbs at full pressure to get it started spraying at times. Definitely, only a couple of us in the party were the appliers as we could get it started.
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Reviewed in the United States on April 16, 2023
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MILA
Alexandria, US
★★★★★ 5
Love it! Eco-friendly and Easy-to-Use Spray
Style: SPF 50, Size: 6 Fl Oz (Pack of 2), Style: SPF 50, Size: 6 Fl Oz (Pack of 2)
I really like the Alba Botanicals Coconut Clear Spray! Not only does it give me a refreshing coconutty vibe, but it’s also biodegradable and cruelty-free, which is important to me. 🐰♻️ The spray-on application is a breeze, and I love how it doesn’t leave that annoying greasy feeling on my skin. It absorbs quickly and leaves my skin feeling soft and nourished. Perfect for those sunny beach days or any time I need a quick spritz of hydration. I highly recommend this coconut clear spray to everyone who values eco-friendly choices and easy-to-use skincare products.
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Reviewed in the United States on July 17, 2023
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Kayla Penkava
Los Angeles, US
★★★★★ 3
Great product, bad packaging
Style: SPF 50, Size: 6 Fl Oz (Pack of 2)
I love this sunscreen! I use it on myself and my child and it works very well. However, the spray nozzle on one of the cans is locked and it will not work. I have tried to turn the lock, lift it up, etc., to no avail. This item is also not returnable. $20 for 1 can of sunscreen is quite expensive.
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Reviewed in the United States on September 7, 2023
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Deb
Fort Morgan, US
★★★★★ 5
Great product
Style: SPF 50, Size: 6 Fl Oz (Pack of 2)
Product is great with good coverage and ease of use. Much better than comparable products because it is very light feeling and doesn't leave a heavy or sticky residue on your skin. Perfect protection for anyone who burns easily or fair skinned. However I paid for the extra rushed 3 day shipping and it was delayed and I wasn't reimbursed the extra shipping charges even though it arrived 6 days later.
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Reviewed in the United States on February 16, 2024
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Amazon Customer
Birmingham, US
★★★★★ 1
Save your money- don’t buy
Style: SPF 50, Size: 6 Fl Oz (Pack of 2)
Purchased this for our trip to Mexico. At two cruise ports we were doing a combination snorkel and pool day. I got this sunscreen because it was reef friendly and came with two bottles. Both bottles were IMPOSSIBLE to spray. You could not sunscreen yourself because you had to hold the bottle just right, push down with extreme force, and have your fingers place very specifically on the lid. My 13 year old and husband couldn’t even use the bottles. I did figure it out so I had to continually sunscreen everyone in the family. No one in my family has sensitive skin, but we all ended up with a fine rash after using this sunscreen. On days prior we used another brand and no one had a problem. We also reapplied often (every 60-90 min) and we still got pretty burnt. Maybe we got a bad batch…
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Reviewed in the United States on April 2, 2023

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