Nitrated cellulose grafted by spirooxazine group and preparation method thereof

A technology of nitrocellulose and spirooxazine, applied in the direction of chemical instruments and methods, color-changing fluorescent materials, etc., can solve problems such as phase separation, and achieve the effect of excellent performance and good photochromic performance
CN101701052AInactive Publication Date: 2010-05-05SHAANXI TECHN INST OF DEFENSE IND
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
SHAANXI TECHN INST OF DEFENSE IND
Publication Date
2010-05-05
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a nitrated cellulose grafted by spirooxazine group, which is shown by structural formula (I), wherein R is nitrated cellulose, and n is equal to 1-100; and the invention also discloses a preparation method of the nitrated cellulose, which comprises: dissolving the nitrated cellulose into methylisobutylketone, and obtaining mixture A; adding acrylic ester dye monomer containing the spirooxazine group into the mixture A, filling nitrogen for protection, evenly stirring, heating up to 70 DEG C, adding benzoyl peroxide for initiating polymerization reaction, reacting for 3.0h, cooling in ice water bath, and obtaining mixture B; using petroleum ether to lead impure graft to be precipitated, and using benzene to extract the graft for 48.0h in a Soxhlet extractor; and finally, removing dye homopolymer, carrying out vacuum drying at 60 DEG C, and obtaining high polymer of the nitrated cellulose. The high polymer has good photochromic performance, and can be used for preparing a photochromic film and coating. On the molecular level, the nitrated cellulose is a homogeneous system, and the spirooxazine can not be separated from the nitrated cellulose after a long-term use.
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Description

technical field The invention belongs to the field of spirooxazine photochromic polymer materials, and in particular relates to nitrocellulose grafted with spirooxazine groups and a preparation method thereof. Background technique Photochromism refers to a compound that is irradiated by a certain wavelength of light and undergoes a specific chemical reaction to produce a product. Its absorption spectrum changes significantly, and it returns to its original form under the action of another wavelength of light or heat. Spirooxazine is a class of photochromic compounds with excellent photochemical properties, but the thermal stability of the ring-opening body of small molecule spirooxazine compounds is poor during the photochromic process, and small molecule spirooxazine compounds are limited in the manufacture of devices. The preparation of spirooxazine compounds as polymers with photochromic properties has obvious advantages in practical applications. At the same time, schol...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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