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Preparation of acyl functionalized cellulose nanocrystals from cellulose pulp via a one-step strategy

첫 페이지 보기
  • 발행기관
    강원대학교 산림과학연구소 바로가기
  • 간행물
    강원대학교 산림과학연구소 학술대회 바로가기
  • 통권
    2019 International Symposium of Institute of Forest Science (2019.09)바로가기
  • 페이지
    pp.136-136
  • 저자
    Hui Wang, Ying Li, Lin Sun, Kun Liu, Hongxiang Xie, Chuanling Si
  • 언어
    영어(ENG)
  • URL
    https://www.earticle.net/Article/A450375

원문정보

초록

영어
Surface modification of cellulose nanocrystals (CNCs) is of great interest, especially to facilitate their use as polymer reinforcements. Generally, alteration of the surface chemistry is performed using multiple reaction steps. In contrast, this study demonstrates that the hydrolysis of disordered regions of cellulose along with the esterification of accessible hydroxyl groups can be performed simultaneously in a single step to produce surface functionalized CNCs. The reaction is carried out in an acid mixture composed of H2SO4, one type of organic acids (formic, acetic and butyric acids are all demonstrated) and H2O with a mass ratio of 1:7:2 for 3-7 h. The rod-like CNCs could be obtained with a high yield (>70%) and high crystallization index (>75%). Thermogravimetric analysis revealed that all of the obtained CNCs exhibited good thermal stability (Tmax >330 °C) which were better than that of the typical sulfuric acid hydrolysis ones. Moreover, due to the negative charged sulfate groups and ester groups introduced on the surface of CNCs in the mixed acid hydrolysis process, the resultant CNCs showed a typical flow birefringence under polarized light and CNC aqueous suspensions could be stably stored for a long time (over one month). Therefore, the present work demonstrated an efficient and sustainable preparation method for the acyl functionalized CNCs with high yield and good thermal stability.

키워드

Cellulose nanocrystals Mixed acid hydrolysis Surface functionalization Preparation One-step strategy

저자

  • Hui Wang [ Tianjin Key Laboratory of Pulp and Paper, Tianjin University of Science and Technology, Tianjin 300457, China ]
  • Ying Li [ Tianjin Key Laboratory of Pulp and Paper, Tianjin University of Science and Technology, Tianjin 300457, China ]
  • Lin Sun [ Tianjin Key Laboratory of Pulp and Paper, Tianjin University of Science and Technology, Tianjin 300457, China ]
  • Kun Liu [ Tianjin Key Laboratory of Pulp and Paper, Tianjin University of Science and Technology, Tianjin 300457, China ]
  • Hongxiang Xie [ Tianjin Key Laboratory of Pulp and Paper, Tianjin University of Science and Technology, Tianjin 300457, China; Key Laboratory of Bio-based Material Science & Technology (Northeast Forestry University), Ministry of Education, Harbin 150040, China ] Corresponding Author
  • Chuanling Si [ Tianjin Key Laboratory of Pulp and Paper, Tianjin University of Science and Technology, Tianjin 300457, China; Key Laboratory of Bio-based Material Science & Technology (Northeast Forestry University), Ministry of Education, Harbin 150040, China ] Corresponding Author

참고문헌

자료제공 : 네이버학술정보

간행물 정보

발행기관

  • 발행기관명
    강원대학교 산림과학연구소 [Institute of Forest Science Kangwon National University]
  • 설립연도
    1975
  • 분야
    농수해양>임학
  • 소개
    강원대학교부설산림과학연구소(이하 “연구소”라 한다)는 산림에 관한 제반 학술적 연구를 통하여 산림자원의 효용을 밝히고 임업 및 임산업의 발전에 기여함을 목적으로 한다.

간행물

  • 간행물명
    강원대학교 산림과학연구소 학술대회
  • 간기
    부정기
  • 수록기간
    2017~2024
  • 십진분류
    KDC 526 DDC 634

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