Use of sulfobutylether beta cyclodextrin for preparing ceramics

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A very few patent applications may trace back prior art disclosure to the Neolithic Age (from 10000 – 4500 BC) but invention CN111704467 does so. As far as ceramics are concerned, Chinese researchers may rightfully refer to their rich ancient traditions in preparing clay-based composites. In this recent patent application, an organic ceramic precursor composition comprising sulfobutylether beta cyclodextrin (SBECD) and a nitrogen- and silicon-containing polymer (propargyl polysilazane) preferably also combined with graphene is disclosed as suitable additive to a raw cheramic product. The inventor (Luo Bing at Shenzhen Kesifei Tech Co Ltd) speculates that SBECD forms a pseudoroxane with the applied polymer. The use of 2-hydroxypropyl beta cyclodextrin is also discussed. The complex additive is not only proposed for high-tech industrial cheramic materials, but also for artistic, decorative objects. The subject matter of the invention has excellent high temperature resistance, has improved mechanical strength, has “beautiful” and diverse concave textures, and can also have a long-lasting and efficient antibacterial surface.

The final product actually no longer contains cyclodextrin due to the final heating of the composite exceeding 1000-1200 Celsius. The sulfur and nitrogen content of the hypothesized pseudorotaxane contributes to gas formation resulting in pores within the texture of the ceramic as well as potentially functionalizing the graphene backbone.

Even though cyclodextrin is sacrificed at the end, this non-conventional application of a CD is a surprising extension of the scope of possible uses.


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