Nanoparticles with multiple attached polymer assemblies and use thereof in polymer composites
US-9475922-B2 · Oct 25, 2016 · US
Raft agents and their use in the development of polyvinylpyrrolidone grafted nanoparticles
US10954325B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10954325-B2 |
| Application number | US-201916545370-A |
| Country | US |
| Kind code | B2 |
| Filing date | Aug 20, 2019 |
| Priority date | Jul 22, 2014 |
| Publication date | Mar 23, 2021 |
| Grant date | Mar 23, 2021 |
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- Title
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Abstract
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Nanoparticles having a plurality of PVP chains covalently bonded to a surface of the nanoparticle are provided, along with their methods of formation and the RAFT agents for the polymerization of the PVP chains. RAFT agents are generally provided, along with their methods of formation and use. Methods are also generally provided for grafting a PVP polymer onto a nanoparticle. In one embodiment, the method includes polymerizing a plurality of monomers in the presence of a RAFT agent to form a polymeric chain covalently bonded to the nanoparticle.
First claim
Opening claim text (preview).
What is claimed: 1. A method of grafting a PVP polymer onto a nanoparticle, the method comprising: polymerizing a plurality of monomers in the presence of a RAFT agent to form a polymeric chain covalently bonded to the nanoparticle, wherein the plurality of monomers comprises N-vinylpyrrolidone, and wherein the RAFT agent is selected from the group consisting of: where R 1 is H or a C 1 to C 5 alkyl group; R 2 is an electron withdrawing group; R 3 is a hydroxyl group, a thioazoline group, or an ether group; and n is 1 to 12; and where R 4 is H or a C 1 to C 5 alkyl group; R 6 is an electron withdrawing group; R 6 is a hydroxyl group, a thioazoline group, or an ether group; and m is 1 to 12. 2. The method of claim 1 , wherein R 1 or R 4 is H. 3. The method of claim 1 , wherein R 2 or R 5 is CN, NO 2 , SO 3 H, or a halogen. 4. The method of claim 3 , wherein R 2 or R 5 is a nitrile group. 5. The method of claim 1 , wherein n or m is 2. 6. The method of claim 1 , wherein R 3 or R 6 is OR 7 with R 7 being a C 1 to C 5 alkyl group. 7. The method of claim 1 , wherein R 3 or R 6 is a hydroxyl group. 8. The method of claim 1 , wherein R 3 or R 6 is a thioazoline group.
Assignees
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Classifications
Use of a di- or tri-thiocarbonylthio compound, e.g. di- or tri-thioester, di- or tri-thiocarbamate, or a xanthate as chain transfer agent, e.g . Reversible Addition Fragmentation chain Transfer [RAFT] or Macromolecular Design via Interchange of Xanthates [MADIX] · CPC title
Sulfur atoms · CPC title
Radicals derived from thio- or thiono carboxylic acids · CPC title
- C08F126/10Primary
N-Vinyl-pyrrolidone · CPC title
Macromolecular compounds obtained by polymerising monomers on to inorganic materials · CPC title
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- What does patent US10954325B2 cover?
- Nanoparticles having a plurality of PVP chains covalently bonded to a surface of the nanoparticle are provided, along with their methods of formation and the RAFT agents for the polymerization of the PVP chains. RAFT agents are generally provided, along with their methods of formation and use. Methods are also generally provided for grafting a PVP polymer onto a nanoparticle. In one embodiment,…
- Who is the assignee on this patent?
- Univ South Carolina
- What technology area does this patent fall under?
- Primary CPC classification C08F126/10. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Mar 23 2021 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 5 related publications on this page (citations in our corpus or others sharing the same primary CPC).