Strategy To Enhance Interfacial Properties: Preparation of Porous Polytetrafluoroethylene Fibers and the Adsorption of Initiators/Curing Agents

IF 3.9 2区化学 Q2 CHEMISTRY, MULTIDISCIPLINARY Langmuir Pub Date : 2024-12-24 DOI:10.1021/acs.langmuir.4c04086

Xuhui Sun, Chengcheng Yu, Lin Zhang, Guoxin Xie

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Abstract

Polytetrafluoroethylene (PTFE) fibers exhibit high inertness and demonstrate limited interfacial bonding capabilities with other materials. To overcome this limitation, PTFE@ZnO fibers were developed by depositing the porous ZnO layer onto PTFE fibers via a hydrothermal reaction, and porous fibers were adsorbed curing agents or initiators. The interfacial shear strength (ILSS) of the composites demonstrated a significant improvement, particularly in the case of composites containing PTFE/initiator fibers, where the ILSS increased by 104.8% compared to PTFE alone (from 8.3 to 17.0 MPa). The digital image correlation (DIC) method revealed a more uniform stress distribution in the modified fiber composites at the point of fracture. Additionally, nanoscratch tests indicated a significant enhancement in the interfacial bonding between the modified fibers and the resin. The porous structures facilitated mechanical interlocking between the modified fibers and the resin. Furthermore, the presence of an adsorbed initiator/curing agent within the porous structure served as the initiation site for the free radical polymerization of vinyl ester resin 901, thereby enhancing the interfacial bonding between the modified fibers and the resin. The novel strategy presents a general and viable approach for the extensive modification of PTFE fibers, focusing on achieving exceptional interfacial bonding properties.

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增强界面性能的策略：多孔聚四氟乙烯纤维的制备及引发剂/固化剂的吸附

聚四氟乙烯（PTFE）纤维具有高惰性，与其他材料的界面结合能力有限。为了克服这一限制，通过水热反应将多孔氧化锌层沉积在聚四氟乙烯纤维上，制备了PTFE@ZnO纤维，多孔纤维被吸附为固化剂或引发剂。复合材料的界面剪切强度（ILSS）有了显著的改善，特别是在含有PTFE/引发剂纤维的复合材料中，ILSS比PTFE单独增加了104.8%（从8.3到17.0 MPa）。数字图像相关（DIC）方法显示，改性纤维复合材料在断裂点处的应力分布更为均匀。此外，纳米划痕测试表明，改性纤维与树脂之间的界面结合显著增强。多孔结构促进了改性纤维和树脂之间的机械联锁。此外，多孔结构内吸附的引发剂/固化剂作为乙烯基酯树脂901自由基聚合的起始位点，从而增强了改性纤维与树脂之间的界面键合。该新策略为PTFE纤维的广泛改性提供了一种通用和可行的方法，重点是实现卓越的界面粘合性能。

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来源期刊

Langmuir 化学-材料科学：综合

CiteScore

6.50

自引率

10.30%

发文量

1464

审稿时长

2.1 months

期刊介绍： Langmuir is an interdisciplinary journal publishing articles in the following subject categories: Colloids: surfactants and self-assembly, dispersions, emulsions, foams Interfaces: adsorption, reactions, films, forces Biological Interfaces: biocolloids, biomolecular and biomimetic materials Materials: nano- and mesostructured materials, polymers, gels, liquid crystals Electrochemistry: interfacial charge transfer, charge transport, electrocatalysis, electrokinetic phenomena, bioelectrochemistry Devices and Applications: sensors, fluidics, patterning, catalysis, photonic crystals However, when high-impact, original work is submitted that does not fit within the above categories, decisions to accept or decline such papers will be based on one criteria: What Would Irving Do? Langmuir ranks #2 in citations out of 136 journals in the category of Physical Chemistry with 113,157 total citations. The journal received an Impact Factor of 4.384*. This journal is also indexed in the categories of Materials Science (ranked #1) and Multidisciplinary Chemistry (ranked #5).