MANUFACTURING METHOD OF DEHYDRATED CELLULOSE NANOFIBER

To provide a manufacturing method of dehydrated cellulose nanofiber (CNF) having sufficient redispersibility and a method capable of improving the redispersibility of the CNF.SOLUTION: A manufacturing method of dehydrated CNF comprises a step of obtaining an aqueous suspension of anion denatured CNF by mixing anion denatured CNF and a redispersibility improvement agent, and a step of obtaining the dehydrated CNF by drying the aqueous suspension, in which the redispersibility improvement agent is selected from the group consisting of a saccharide having a molecular weight of 50,000 or smaller, a low molecular weight polypeptide, amino acid, and a low molecular weight polyvinyl alcohol, and a redispersibility improvement method of CNF comprises a step of obtaining an aqueous suspension of anion denatured CNF by mixing anion denatured CNF and a redispersibility improvement agent, and a step of obtaining the dehydrated CNF by drying the aqueous suspension, in which the redispersibility improvement agent is selected from the group consisting of a saccharide having a molecular weight of 50,000 or smaller, a low molecular weight polypeptide, amino acid, and a low molecular weight polyvinyl alcohol.SELECTED DRAWING: None 【課題】 十分な再分散性を有する乾燥セルロースナノファイバー（ＣＮＦ）の製造方法及びＣＮＦの再分散性を向上可能な方法を提供する。【解決手段】 アニオン変性ＣＮＦと再分散性改善剤とを混合してアニオン変性ＣＮＦの水性懸濁液を得ること、及び前記水性懸濁液を乾燥させて乾燥ＣＮＦを得ることを含み、前記再分散性改善剤は、分子量が５万以下の糖類、低分子量のポリペプタイド、アミノ酸、及び低分子量のポリビニルアルコールからなる群から選択される乾燥ＣＮＦの製造方法、並びにアニオン変性ＣＮＦと再分散性改善剤とを混合してアニオン変性ＣＮＦの水性懸濁液を得ること、及び前記水性懸濁液を乾燥させることを含み、前記再分散性改善剤は、分子量が５万以下の糖類、低分子量のポリペプタイド、アミノ酸、及び低分子量のポリビニルアルコールからなる群から選択されるＣＮＦの再分散性改善方法に関する。【選択図】なし