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| High-yield Preparation of Cellulose Nanocrystals by Citric Acid Hydrolysis Combined with Catalyst and Mechanical Assistance |
| Received:April 15, 2022 |
| DOI：10.11980/j.issn.0254-508X.2023.02.001 |
| Key Words:citric acid ferric chloride micro fluidization CNC cleaner production |
| Fund Project:广东省科技创新战略专项资金（pdjh2020a0035）；广东省自然科学基金（2020A1515010823）；制浆造纸科学与技术教育部重点实验室开放基金（KF201918）。 |
| Author Name | Affiliation | Postcode | | CEN Yu | State Key Lab of Pulp and Paper Engineering, South China University of Technology, Guangzhou, Guangdong Province, 510640
Key Lab of Pulp and Paper Science and Technology of Ministry of Education, Qilu Universty of Techndogy (Shandong Acadeny of Sciences), Ji’nan, Shandong Proviuce, 250353 | 250353 | | WANG Lisheng | State Key Lab of Pulp and Paper Engineering, South China University of Technology, Guangzhou, Guangdong Province, 510640
Key Lab of Pulp and Paper Science and Technology of Ministry of Education, Qilu Universty of Techndogy (Shandong Acadeny of Sciences), Ji’nan, Shandong Proviuce, 250353 | 250353 | | XIANG Zhouyang | State Key Lab of Pulp and Paper Engineering, South China University of Technology, Guangzhou, Guangdong Province, 510640 | 510640 | | SONG Tao* | State Key Lab of Pulp and Paper Engineering, South China University of Technology, Guangzhou, Guangdong Province, 510640
Key Lab of Pulp and Paper Science and Technology of Ministry of Education, Qilu Universty of Techndogy (Shandong Acadeny of Sciences), Ji’nan, Shandong Proviuce, 250353 | 250353 |
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| Abstract:High-yield cellulose nanocrystals （CNC） with high carboxyl group content were prepared from bleached sugarcane bagasse pulp， by citric acid hydrolysis， using ferric chloride as catalyst， with assistance of short-time micro fluidization. The results showed that addition of ferric chloride significantly improved the CNC yield of 60.2%. With addition of ferric chloride， the size of the CNC （119~507 nm） was significantly reduced， the carboxyl content and crystallinity were both increased to 1.01 mmol/g CNC and 74.7%， respectively. Prepared CNC had good thermal stability and dispersion stability. Moreover， mechanical energy consumption was effectively reduced due to acid hydrolysis pretreatment， and chemicals could be recycled with a recovery rate higher than 89%. |
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