Solvent-free preparation of propionyl-modified pulp fibers for high-density polyethylene reinforcement

被引:0
|
作者
Zhang, Shuya [1 ]
Zhao, Yixin [1 ]
Che, Mingda [1 ,3 ]
Huang, Renliang [2 ,3 ,4 ]
Cui, Mei [1 ]
Qi, Wei [1 ]
Su, Rongxin [1 ,2 ,3 ]
机构
[1] Tianjin Univ, Sch Chem Engn & Technol, State Key Lab Chem Engn, Tianjin 300072, Peoples R China
[2] Tianjin Univ, Sch Marine Sci & Technol, Tianjin Key Lab Marine Environm Res & Serv, Tianjin 300072, Peoples R China
[3] Tianjin Univ, Ningbo Key Lab Green Petrochem Carbon Emiss Reduct, Zhejiang Inst, Ningbo 315201, Zhejiang, Peoples R China
[4] Tianjin Sustainable Novel Mat Co Ltd, Tianjin 300192, Peoples R China
关键词
CARBOXYMETHYLATED NANOFIBRILLATED CELLULOSE; MECHANICAL-PROPERTIES; CHEMICAL-MODIFICATION; SURFACE; ACETYLATION; COMPOSITES; INTERFACE; POLYMER; FUNCTIONALIZATION; STABILITY;
D O I
10.1039/d4gc03885a
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
With the advancement of lightweight and high-strength fiber-reinforced composites, various chemical modification methods have been proposed to improve the compatibility between fiber and plastic matrix. Among these, acetic anhydride modification is particularly notable, but its low activity necessitates the use of hazardous agents and results in suboptimal mechanical properties after reinforcement. Herein, a solvent-free and recoverable esterification approach was developed to modify pulp fibers with propionic anhydride (PAF). Subsequently, the high-density polyethylene (HDPE) was reinforced at multiple levels through capacity addition, filling, and premixing. The results showed that the optimal mechanical properties and minimum coefficient of thermal expansion (CTE) of HDPE/PAF composites were achieved at a DS value of 0.40. Compared to the unmodified fiber-reinforced composites, propionylation not only improved the discoloration of HDPE/PAF composites but also enhanced its hydrophobicity, as evidenced by an increase in the water contact angle from 89.2 degrees to 103.4 degrees. Moreover, compared to the neat HDPE, the tensile strength and modulus increased by a factor of 2.4 and 3.3, respectively, surpassing the improvements reported for other acid anhydride modifications. These findings indicated that the PAF could be uniformly dispersed in the HDPE matrix through a dual network structure. The successful attempts to reinforce other polyolefin matrices and achieve kilogram-scale production have demonstrated the practicality and feasibility of this approach for industrial applications.
引用
收藏
页码:782 / 792
页数:11
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