纳米纤维素乳化苯乙烯-丙烯酸酯共聚物的制备及性能研究

作者：Chen Hongcheng; Yao Zhiwei; Li Xikun; Tang Fangyuan; Yang Rendang^*

来源：China Pulp and Paper, 2022, 41(3): 27-35.

DOI：10.11980/j.issn.0254-508X.2022.03.004

• Nanocellulose
• Pickering emulsion
• Plant fiber
• Styrene-acrylic copolymer

In this study, cellulose nanofibrils (CNF) and cellulose nanocrystal (CNC) were used to emulsify styrene-acrylate (SA) monomers, respectively. The copolymers PSA were obtained with ammonium persulfate(APS)as initiator by free radical polymerization, and its properties and mechanical properties enhancement mechanism were studied.The results showed that nanocellulose played the dual role of surfactant and functional filler in the preparation of PSA, CNF-PSA emulsion had strong stability but high viscosity, while CNC-PSA emulsion had both high stability and low viscosity. The conversion of PSA emulsified with CNF, CNC and sodium dodecyl sulfate(SDS)were 76.32%, 78.28%, and 82.62%, respectively. In addition, the FT-IR and thermogravimetric analysis showed that CNF and CNC were re-tained in the coating during the curing process. The tensile strength of CNF-PSA, CNC-PSA and SDS-PSA films were 8.14, 6.91, and 1.09 MPa, respectively. The elastic modulus of CNF-PSA film was 130.3 MPa, 652 times that of SDS-PSA film. ? 2022, China National Pulp and Paper Research Institute Co., Ltd.(CNPPRI). All right reserved.

• 单位
  华南理工大学; 制浆造纸工程国家重点实验室