| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a method for producing a microfibrous cellulose in which a microfibrous cellulose having a fiber width of 2 to 1000 nm can be easily obtained by mechanically defibrating cellulose fibers. <P>SOLUTION: A method for producing a microfibrous cellulose having a maximum fiber width of 1000 nm or less includes the steps of: processing wood chips into wood flour; chemically treating the wood flour; and pulverizing the resultant. The shape of wood flour that is subjected to the chemical treatment process is processed such that it has a major radius of 10 to 40 μm and a minor radius of 5 to 20 μm at the point where number accumulation in a particle size and shape distribution measurement is 50%. After that, degreasing treatment, delignifying treatment, and hemicellulose removing treatment are carried out in this order in the chemical treatment process. The delignifying treatment is carried out in a temperature range of 70 to 99°C and in a pH range of more than 3 and 7 or less. <P>COPYRIGHT: (C)2012,JPO&INPIT |
