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Prearation and Properties of Cellulose Nanocrystal/Polystyrene Composite Films
Received:March 01, 2023  
DOI：10.11980/j.issn.0254-508X.2023.05.006
Key Words:cellulose nanocrystal  polystyrene  Pickering emulsion  composite material  mechanical property
Fund Project:淮安市自然科学研究计划项目（HAB202165）；国家自然科学基金项目（31901275）；江苏省林业科技创新与推广项目（LYKJ［2021］04）；南京林业大学大学生创新训练计划项目（2022NFUSPITP0063）。
Author NameAffiliationPostcode
XU Ning Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources， College of Chemical Engineering， Nanjing Forestry University， Nanjing， Jiangsu Province， 210037 210037
XU Chaoqun Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources， College of Chemical Engineering， Nanjing Forestry University， Nanjing， Jiangsu Province， 210037 210037
LU Chuanwei Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources， College of Chemical Engineering， Nanjing Forestry University， Nanjing， Jiangsu Province， 210037 210037
HU Lihong Institute of Chemical Industry of Forest Products， CAF， Nanjing， Jiangsu Province， 210042 210042
JIA Puyou Institute of Chemical Industry of Forest Products， CAF， Nanjing， Jiangsu Province， 210042 210042
YU Juan* Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources， College of Chemical Engineering， Nanjing Forestry University， Nanjing， Jiangsu Province， 210037 210037
CHU Fuxiang Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources， College of Chemical Engineering， Nanjing Forestry University， Nanjing， Jiangsu Province， 210037
Institute of Chemical Industry of Forest Products， CAF， Nanjing， Jiangsu Province， 210042 		210042
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Abstract:The high-efficiency composite of hydrophilic cellulose nanocrystal （CNC） and hydrophobic polystyrene （PS） was realized by Pickering emulsion method in one step， and CNC/PS composite films with excellent mechanical properties were prepared by solution casting into film and hot pressing coupling. The results showed that although the addition of CNC could reduce the transparency of pure PS film， when the amount of CNC was lower than 10%， CNC/PS composite films still maintained transparency. When the amount of CNC was 8%， the droplet size and uniformity of droplet distribution in the CNC/PS composite emulsion were the best. At this time， the mechanical properties of CNC/PS composite film were the best. The tensile strength of CNC/PS composite film was 33.8 MPa， which was much higher than that of pure PS film （18.9 MPa）， the toughness and Young’s modulus of it were increased to 408.1 kJ/m3 and 1.9 GPa， which were 1.8 times and 1.5 times of that of pure PS film， respectively. When the amount of CNC increased to 20%， the CNC/PS composite film showed whitening and a significant decrease of light transmittance，but still had comparable mechanical properties with the pure PS film （tensile strength of 20.9 MPa， Young’s modulus of 1.6 GPa）.
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