Surface grafted poly (N-isopropyl acrylic amide) TiO2 nano particles and preparation method thereof
A technology of isopropylacrylamide and surface grafting, applied in the direction of nanotechnology, nanotechnology, nanotechnology, etc. for materials and surface science, to achieve uniform distribution, wide application prospects, and controllable thickness
Active Publication Date: 2012-01-18
HARBIN INST OF TECH
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Problems solved by technology
Current research on surface grafting of poly(N-isopropylacrylamide) TiO using single electron transfer living radical polymerization 2 Nanoparticles and their preparation methods have not been reported yet
Method used
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specific Embodiment approach 1
[0024] Specific implementation mode one: in this implementation mode, surface grafting poly(N-isopropylacrylamide) TiO 2 Nanoparticles are nano-TiO grafted with poly(N-isopropylacrylamide) on the surface 2 .
specific Embodiment approach 2
[0025] Specific embodiment two: the difference between this embodiment and specific embodiment one is: the nano-TiO 2 The particle size is 35-50nm. Others are the same as in the first embodiment.
specific Embodiment approach 3
[0026] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is: the nano-TiO 2 The crystal structure is anatase. Others are the same as in the first or second embodiment.
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Abstract
The invention discloses a preparation method of surface grafted poly (N-isopropyl acrylic amide) TiO2 nano particles, and belongs to the field of TiO2 poly (N-isopropyl acrylic amide) hybrid systems. The method comprises the following steps of: performing amino modification on the TiO2, grafting acyl bromide functional groups to the TiO2, and grafting the poly (N-isopropyl acrylic amide) (PNIPAM) to the surface of the TiO2 by a single electron transfer living radical polymerization (SET-LRP) method. The PNIPAM is grafted to the surface of the TiO2 by using the aqueous phase SET-LRP process, so that the polymer and the nano particles are distributed uniformly, the thickness of the polymer on the surface of the TiO2 is controllable, and the method has the characteristics of high grating rate, high grafting speed, low polymerization temperature, mild conditions and the like. The particles have wide application prospect in the fields of chemical mechanical polishing, water treatment, biomedical application and the like.
Description
technical field [0001] The present invention belongs to TiO 2 Poly(N-isopropylacrylamide) hybrid system field. Background technique [0002] Nano-TiO 2 It is a semiconductor material with good chemical stability, non-toxicity and low price, and it has a wide range of applications in the fields of cosmetics, solar cells, antibacterial building materials and heterogeneous photocatalysis. Current research on surface grafting of poly(N-isopropylacrylamide) TiO using single electron transfer living radical polymerization 2 Nanoparticles and their preparation methods have not been reported yet. Contents of the invention [0003] The purpose of the present invention is to provide a novel surface grafted poly(N-isopropylacrylamide) TiO 2 Nanoparticles and methods for their preparation. [0004] Surface-grafted poly(N-isopropylacrylamide) on TiO 2 Nanoparticles are nano-TiO grafted with poly(N-isopropylacrylamide) on the surface 2 . [0005] Surface-grafted poly(N-isopropyl...
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IPC IPC(8): C01G23/047B82Y30/00B82Y40/00
Inventor 唐冬雁宫再霖韩帅崔巍巍郭玉娣林秀玲程言
Owner HARBIN INST OF TECH
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