膜科学与技术

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Preparation and study of aromatic tertiary amine functionalized
polypropylene hollow fiber membrane

Authors： LI Hao1, YANG Jinghao1, ZHANG Shitao2, LIU Heng2, LI Mingyuan1, CAI Zhengguo1, CHEN Long1, SUN Junfen1

Units： 1. State Key Laboratory of Advanced Fiber Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, China; 2. Hubei Botao Synthetic Fiber Co., Ltd., Jingmen 448002, China

KeyWords： bulk modification; hydrophilic modification; polypropylene hollow fiber membrane; aromatic tertiary amine

ClassificationCode：TQ028

year,volume(issue):pagination： 2025,45(2):20-29

Abstract：

In this study, polypropylene copolymer PP[N(hexenol)]Ph2(PPPH) with aromatic tertiary amine group contents (mole fraction) of 2%, 2.5% and 3.3% were synthesized by bulk modification strategy, and PPPH hollow fiber membranes with hydrophilic properties were synthesized by introducing aromatic tertiary amine groups into polypropylene (PP). Nuclear magnetic resonance hydrogen spectroscopy (NMR), Fourier transform infrared spectroscopy (FTIR), and scanning electron microscopy (SEM) were used to characterize the chemical structure and surface morphology of the membranes. At the same time, thermogravimetric analysis (TGA), contact angle measurement and mechanical property test were used to systematically evaluate the comprehensive properties of the membranes. The results showed that the introduction of aromatic tertiary amine groups improved the hydrophilic performance and thermal stability of PP hollow fiber membranes. When the content of the aromatic tertiary amine group was 3.3%, the water contact angle was reduced to 76 ℃, the thermal decomposition temperature of PPPH hollow fiber membrane was increased to 450 ℃, the pore size of PPPH hollow fiber membrane was 125 nm, the porosity was 38.7 %, the breaking strength was 65.0 MPa, and the elongation at break was 433.0%. The pure water flux of the modified hollow fiber membrane reached 385.0 L/(m2·h）, which was 1.6 times that of the PP hollow fiber membrane. In addition, PPPH hollow fiber membranes exhibit good chemical stability in both high-concentration salt solution and alkaline solution environments.

Funds：

中央高校基本科研业务费专项资金

AuthorIntro：

李浩（1999-），男，河南周口人，硕士研究生，研究方向为功能高分子材料

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