Cellulose nanocrystalline photonic gel as well as preparation and application thereof

The invention discloses a sustainable, insoluble and photonic cellulose nanocrystal patch for calcium ion sensing, which is characterized in that a physical doping method and an evaporation-induced self-assembly technology are combined, and an optimized cellulose nanocrystal/polyvinyl alcohol photonic film forms a stable hydrogel network in an aqueous solution by utilizing thermal dehydration; swelling the dried cellulose nanocrystal/polyvinyl alcohol film in a sodium alginate solution to prepare cellulose nanocrystal/polyvinyl alcohol/sodium alginate photon gel; according to the invention, green and sustainable cellulose nanocrystals are used as a matrix; sodium alginate is a functional polymer; excellent freezing resistance, biocompatibility and Ca < 2 + > sensing high-sensitivity and high-selectivity comprehensive performance are realized. 本发明公开了一种用于钙离子传感的可持续、不溶性和光子纤维素纳米晶体贴片，该方法采用物理掺杂法和蒸发诱导自组装技术相结合，利用热脱水使优化的纤维素纳米晶/聚乙烯醇光子薄膜在水溶液中形成稳定的水凝胶网络，在海藻酸钠溶液中溶胀干燥的纤维素纳米晶/聚乙烯醇薄膜，制备纤维素纳米晶/聚乙烯醇/海藻酸钠光子凝胶；本发明用绿色可持续的纤维素纳米晶为基体