인문학
사회과학
자연과학
공학
의약학
농수해양학
예술체육학
복합학
지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
초록·키워드
Pretreatments with aqueous protic ionic liquid (PIL)-ethanolamine bis(oxalate) ([MEA][(HOA)(H<sub>2</sub>OA)]), combined with ultrasonic disintegration, were employed in cellulose nanofibril (CNF) production from pulp fibers. The optimization of pretreatment parameters is crucial for obtaining the maximum CNF yield. The response surface methodology was used to design the pretreatment conditions for preparing CNFs. This method consists of four factors: pretreatment time (<i>A</i>, 2-4 h), pretreatment temperature (<i>B</i>, 100-120 °C), liquid-to-solid ratio (<i>C</i>, 60-80 g g<sup>-1</sup>), and PIL content (<i>D</i>, 20-40%). The predicted CNF yield (<i>Y</i>) followed a quadratic multinomial regression equation represented by <i>Y</i> = 84.43 + 3.59<i>A</i> + 8.22<i>B</i> + 2.22<i>C</i> - 2.13<i>D</i> - 0.85<i>AB</i> + 2.83<i>AC</i> + 5.95<i>AD</i> + 0.43<i>BC</i> - 2.98<i>BD</i> + 4.25<i>CD</i> - 6.04<i>A</i><sup>2</sup> - 18.23<i>B</i><sup>2</sup> - 4.98<i>C</i><sup>2</sup> - 7.39<i>D</i><sup>2</sup>. The regression equation exhibited high model fit to the experimental CNF yields as evidenced by a determination coefficient of 0.9764. Results showed that a maximum CNF yield of 86.2% was obtained in the case with the following conditions: pretreatment temperature of 112 °C, pretreatment time of 3.2 h, liquid-to-solid ratio of 83 g g<sup>-1</sup>, and PIL content of 29%. CNFs with high crystalline index (64.0%) and thermal stability (<i>T</i><sub>max</sub> = 348 °C) were prepared. This work favors the development of low cost PIL-based pretreatment systems for the clean production of CNFs.
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오류를 발견하셨다면 해당 부분을 드래그한 후 ' 를 통해 신고해주세요.
오류를 발견하셨다면 해당 부분을 드래그한 후 ' 를 통해 신고해주세요.