PROBLEM TO BE SOLVED: To provide an aerogel excellent in restorability.SOLUTION: The method for producing processed cellulose aerogel includes (A) a step for preparing an approximately cubic or rectangular cellulose aerogel including a first aerogel layer having a low cellulose fiber density, and a second aerogel layer having a higher cellulose fiber density than the first aerogel layer, wherein the layers are laminated so that the main surfaces of the layers are approximately parallel to the bottom surface of the approximately cubic or rectangular cellulose aerogel and one of the outermost outer layers is the second aerogel layer, and (B) a step for disposing a plurality of cuts 1 having a depth x defined by the following formula: 0.02 L≤x≤0.1 L (wherein L is the average length of the long side and short side of the cut surface of the approximately cubic or rectangular cellulose aerogel) in parallel to one of the long side and the short side, or disposing a plurality of the cuts 1 having the depth x in parallel to one of the long side and the short side, and further disposing a plurality of cuts 2 having the depth x in parallel to the other side.COPYRIGHT: (C)2013,JPO&INPIT【課題】復元性に優れるエアロゲルを提供する。【解決手段】(A)セルロース繊維密度の低い第1エアロゲル層および当該第1エアロゲル層よりもセルロース繊維密度の高い第2エアロゲル層を備える、略立方体または略直方体のセルロースエアロゲルであって、前記層の主面が前記略立方体または略直方体の底面に略平行になるように各層が積層されており、かつ最外層の一つが前記第2エアロゲル層である、セルロースエアロゲルを準備する工程、ならびに(B)前記最外層を構成する第2エアロゲル層表面に、下記式で定義される深さx:0.02L≦x≦0.1L(ただしLは前記略立方体または略直方体の切込が設けられる面の長辺と短辺の平均の長さ)の切込1を長辺と短辺のいずれかに平行に複数設ける、または、深さxの切込1を長辺と短辺のいずれか一方の辺に平行に複数設け、さらに他方の辺に平行に深さxの切込2を複数設ける工程、を含む、加工セルロースエアロゲルの製造方法。【選択図】図2
