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Preparation and characterization of carboxylic cellulose nanocrystals via a sustainable approach of FeCl3-catalyzed innocuous citric acid hydrolysis

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.135-135
  • 저자
    Wei Liu, Xiaoyi Zhang, Huayu Liu, Hongxiang Xie, Chuanling Si
  • 언어
    영어(ENG)
  • URL
    https://www.earticle.net/Article/A450374

원문정보

초록

영어
Acid hydrolysis is the most common method to prepare cellulose nanocrystals (CNCs). citric acid (CA) is a weak poly-carboxylic acid which is beneficial for avoiding cellulose undergoing heavy degradation during acid hydrolysis. However, the weak acidity of CA can mostly lead to a difficulty in hydrolyzing the amorphous part of the cellulose and correspondingly results in a low yield of CNCs. In this work, CNCs were produced from bleached eucalyptus kraft pulp with a high yield over 76% via FeCl3-catalyzed CA hydrolysis process. It was found that the resultant CNCs products with a diameter of 20-30 nm and length of 200-400 nm, and a maximum crystallinity index of about 78% could be achieved when the dose of FeCl3 was 0.03 mM, CA concentration was 80%, and reaction temperature was 80 °C. Meanwhile, carboxylic groups could be introduced onto the surface of CNCs via esterification during FeCl3-catalyzed CA hydrolysis process to form carboxylic CNCs . Results showed that the contents of carboxylic acid groups could reach up to 0.69 mmol g-1, which facilitate their functionalization and dispersion in aqueous processing. The carboxylic CNCs presented in this work offer commercial success and lower toxic risks, which means they have the potential to find applications as environmentally friendly, sustainable, and new bio-based nanomaterials in high-tech fields, such as biomaterials.

키워드

Carboxylic cellulose nanocrystals Citric acid hydrolysis FeCl3-catalysis Preparation Characterization

저자

  • Wei Liu [ Tianjin Key Laboratory of Pulp and Paper, Tianjin University of Science and Technology, Tianjin 300457, China ]
  • Xiaoyi Zhang [ Tianjin Key Laboratory of Pulp and Paper, Tianjin University of Science and Technology, Tianjin 300457, China ]
  • Huayu 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; State Key Laboratory of Tree Genetics and Breeding, Northeast Forestry University, Harbin 150040, China ] Corresponding Author
  • Chuanling Si [ Tianjin Key Laboratory of Pulp and Paper, Tianjin University of Science and Technology, Tianjin 300457, China; State Key Laboratory of Tree Genetics and Breeding, Northeast Forestry University, 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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