Nanometer aquogel with both pH and temperature sensitivity and its preparation process

A nano-hydrogel and surfactant technology, which is applied in the field of environment-sensitive polymer nanomaterials, can solve the problems of not reaching the nanometer level, limited application, single sensitive type, etc., and achieves rapid response capability and simple synthesis process. Effect
CN100393760CInactive Publication Date: 2008-06-11CHINA PHARM UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
CHINA PHARM UNIV
Publication Date
2008-06-11
Estimated Expiration
Not applicable · inactive patent

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Abstract

The present invention relates to sensitive nanometer polymer material, and is especially nanometer N-isopropyl acrylamide aquogel with both pH and temperature sensitivity and its preparation process. The nanometer N-isopropyl acrylamide aquogel has granularity of 30-200 nm and lowest critical solution temperature (LCST) of 35-45 deg.c. The preparation process of the present invention can regulate the granularity and LCST flexibly.
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Description

technical field

[0001] The invention relates to the field of environment-sensitive polymer nanomaterials, in particular to pH- and temperature-sensitive N-isopropylacrylamide nano-hydrogels and a preparation method thereof. Background technique

[0002] Poly N-isopropylacrylamide (PNIPAM) hydrogel is a widely studied class of temperature-sensitive materials. This type of hydrogel has a volume phase transition at its lowest critical solution temperature (LCST: 32°C): When the external temperature is lower than LCST, PNIPAM has hydrophilic properties, swells in aqueous solution, and contains a large proportion of water inside; when the external temperature is higher than LCST, PNIPAM becomes hydrophobic, and the internal water is squeezed out, and its volume changes. small.

[0003] CN01129696.8, CN01129694.1 disclose the preparation method of porous temperature-sensitive poly(N-isopropylacrylamide) hydrogel. CN03144329.X discloses a copolymerization gel of N-isopropylacryla...

Claims

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