Ben Nengjun, Jiang Sulun, Zhao Liping, Gong Jiale, Shen Lu, Wang Kui, Tang Chenyang
Intelligent agricultural equipment collaborative innovation center of Ministry of Education, Yancheng Polytechnic College, South Jiefang Road No. 285, Yancheng, 224051, PR China.
School of Materials Science and Engineering, Yancheng Institute of Technology, Hope Avenue Road No.1, Yancheng, 224051, PR China.
ChemistryOpen. 2025 Jan;14(1):e202400131. doi: 10.1002/open.202400131. Epub 2024 Oct 25.
Here, a combination of dopamine self-polymerization and epoxy modified SiO (M-SiO) grafting was proposed, with the purpose of increasing interfacial adhesion of UHMWPE fiber. Inspired by mussel adhesion, polydopamine (PDA) was deposited onto the surface of UHMWPE fiber to form a thin layer with amino and hydroxyl groups. M-SiO nanoparticles were then adhered to fiber surface via chemical reactions by a "two-step" or "one-step" technology. In the "two-step" technique, the M-SiO nanoparticles were adhered to the surface of PDA modified UHMWPE fiber via reactions between epoxy and amino groups. In the "one-step" method, M-SiO and dopamine were added into the UHMWPE/Tris solution at the same time. Surface morphology and thermal properties of various UHMWPE fibers were tested by SEM and TGA, respectively. Surface wettability of different UHMWPE fibers were evaluated by dynamic contact angle. The results proved that PDA and M-SiO were successfully adhered to the surface of UHMWPE fibers. The mechanical property of modified UHMWPE/Epoxy composites was investigated, and 43.7 % improvement was obtained, compared with unmodified UHMWPE/Epoxy composite. Additionally, micro-bond test revealed that the interfacial property (IFSS value) of modified UHMWPE fiber via the "one-step" method was 6.08 MPa, significantly higher than that of unmodified UHMWPE fiber (2.47 MPa).
在此，提出了多巴胺自聚合与环氧改性二氧化硅（M-SiO）接枝相结合的方法，目的是提高超高分子量聚乙烯（UHMWPE）纤维的界面附着力。受贻贝附着力的启发，聚多巴胺（PDA）沉积在UHMWPE纤维表面，形成具有氨基和羟基的薄层。然后，通过“两步”或“一步”技术，M-SiO纳米颗粒通过化学反应附着在纤维表面。在“两步”技术中，M-SiO纳米颗粒通过环氧基和氨基之间的反应附着在PDA改性的UHMWPE纤维表面。在“一步”方法中，将M-SiO和多巴胺同时加入到UHMWPE/Tris溶液中。分别通过扫描电子显微镜（SEM）和热重分析（TGA）测试了各种UHMWPE纤维的表面形态和热性能。通过动态接触角评估了不同UHMWPE纤维的表面润湿性。结果证明，PDA和M-SiO成功附着在UHMWPE纤维表面。研究了改性UHMWPE/环氧树脂复合材料的力学性能，与未改性的UHMWPE/环氧树脂复合材料相比，性能提高了43.7%。此外，微粘结试验表明，通过“一步”法改性的UHMWPE纤维的界面性能（IFSS值）为6.08MPa，显著高于未改性的UHMWPE纤维（2.47MPa）。
