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섬유 수분 보수력 측정을 통한 셀룰로오스 나노섬유의 피브릴화 특성 평가
송우용(Woo-Yong Song),정수빈(Su Bin Jeong),전소영(So Young Juhn),신수정(Soo-Jeong Shin) 한국펄프·종이공학회 2019 펄프.종이技術 Vol.51 No.1
When water retention value (WRV) method was applied in cellulose nanofibril characterization for fibrillation, there were problems from plugging or passing through filter by cellulose nanofibrils. To solve these problem, a two step WRV method was proposed. Pulp mats were formed with a commercial chemical pulp by 1st WRV process and cellulose nanofibril suspensions were run for 2nd WRV process. There was no plugging or passing problems with pulp mat formed with more than 1.0 of pulp (oven-dried basis). With different centrifugal force and times, optimum condition for 2nd WRV process was 6,000 G with 40 min with constant WRV values. Cellulose nanofbiril with more carboxymethyl group had higher WRV value than other from degree of substitution 0.2 to 0.4. Fibrillation characteristics of cellulose nanofibrils was also compared by TEM image analysis and reached similar result between WRV and TEM image analysis.