Preparation and enhanced oil recovery mechanism of dual-shell amphiphobic fluorinated nano-polymer core–shell materials

Guojie Sui; Hai Lin; Huan Liu; Tingsong Xiong; Shiduo Liu; Shijun Chen

doi:10.2478/pjct-2026-0001

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Preparation and enhanced oil recovery mechanism of dual-shell amphiphobic fluorinated nano-polymer core–shell materials

Green Sciences

Volume 28 (2026): Issue 1 (March 2026)

By: Guojie Sui, Hai Lin, Huan Liu, Tingsong Xiong, Shiduo Liu and Shijun Chen

Open Access

|Apr 2026

Abstract

This study developed dual-shell amphiphobic fluorinated polymer core–shell materials (AFPCSMs) for wettability alteration in tight oil reservoirs. The materials comprise silica nanoparticle cores (30 nm), γ-aminopropyltriethoxysilane methacrylic anhydride inner shells, and fluorinated polymer outer shells via 2,2,2-trifluoroethyl methacrylate dodecafluoroheptyl methacrylate copolymerization. Fourier transform infrared spectrometer, X-ray photoelectron spectroscopy, and thermogravimetric analyzer characterization confirmed successful dual-shell construction. AFPCSMs achieved superior amphiphobic properties with water contact angles of 145.3°, n-hexadecane contact angles of 132.6°, and surface free energy reduction to 1.44 mN/m (95.7% decrease). Stability tests demonstrated excellent retention rates: 92.1% thermal stability at 120°C, 94.7% salt resistance under 25,000 mg/L salinity, and 91.1% durability after 72-h flooding. Core flooding experiments showed enhanced oil recovery of 71.52% with 36.05 percentage points net increase (101.6% relative enhancement) and lowest pressure gradient (0.85 MPa/PV). Comparative studies confirmed the dual-shell design’s superiority over single-shell materials across all evaluation criteria, providing an effective approach for precision wettability control in challenging reservoir applications.

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Articles in this issue

DOI: https://doi.org/10.2478/pjct-2026-0001 | Journal eISSN: 3072-0389

Journal RSS Feed

Language: English

Page range: 1 - 16

Submitted on: Sep 21, 2025

Accepted on: Jan 2, 2026

Published on: Apr 27, 2026

Published by: West Pomeranian University of Technology, Szczecin

In partnership with: Paradigm Publishing Services

Publication frequency: Volume open

Keywords:

Dual-shell nanoparticles,

Wettability alteration,

Enhanced oil recovery,

Fluorinated polymers

Related subjects:

Industrial chemistry,

Biotechnology,

Chemical engineering,

Process engineering

© 2026 Guojie Sui, Hai Lin, Huan Liu, Tingsong Xiong, Shiduo Liu, Shijun Chen, published by West Pomeranian University of Technology, Szczecin
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

Volume 28 (2026): Issue 1 (March 2026)