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Peer-reviewedCC BY-NC-ND 4.0ACS Omega

Research on Reversible Wetting Regulation and Interfacial Adaptive Behavior of Multi-Stimulus Responsive Nanoparticles

  • Yanxia Zhou1
  • Xinyue Cao1
  • Xin Song2
  • Lihua Xiao2
  • Pengfei Cheng3
  • Yi Wang1
  • Rui Hu1
  • Shuye Xiao1
  1. 1Northeast Petroleum University , , , ,
  2. 2Tianjin Branch of CNOOC (China) Co., Ltd. , ,
  3. 3China National Petroleum Corp Liaohe Oilfield Exploration and Development Research Institute , , ,
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Abstract

Stimulus-responsive nanomaterials with reversibly switchable wettability are promising for separation and interfacial engineering. Here, polymer-modified silica nanoparticles (Si@(MO)NPs) grafted with MEO2MA-co-OEGMA were synthesized, showing dual salt- and acid-responsive wettability switching. High ionic strength induces dehydration and collapse of the polymer shell, switching wettability from hydrophilic to oleophilic and driving migration to the oil phase or interface; subsequent acid stimulation protonates carboxyl groups, restoring hydration and chain extension and enabling reverse migration to the aqueous phase. Molecular dynamics simulations show that increasing salt concentration reduces polymer–water hydrogen bonding and the radius of gyration while enhancing mobility toward the oil phase, whereas 5 wt % citric acid optimizes protonation, stabilizes extended chain conformations, and improves interfacial hydration and diffusion. These results establish a coupled hydration-conformation regulation mechanism for designing multistimuli-responsive nanomaterials.

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Cite

BibTeXRIS
BibTeX
@article{zhou2026research,
  title = {{Research on Reversible Wetting Regulation and Interfacial Adaptive Behavior of Multi-Stimulus Responsive Nanoparticles}},
  author = {Yanxia Zhou and Xinyue Cao and Xin Song and Lihua Xiao and Pengfei Cheng and Yi Wang and Rui Hu and Shuye Xiao},
  journal = {ACS Omega},
  year = {2026},
  month = oct,
  doi = {10.1021/acsomega.6c09021},
  url = {https://pubs.acs.org/acsodf/article/doi/10.1021/acsomega.6c09021/5461485/Research-on-Reversible-Wetting-Regulation-and},
  note = {CC BY-NC-ND 4.0},
}
RIS
TY  - JOUR
TI  - Research on Reversible Wetting Regulation and Interfacial Adaptive Behavior of Multi-Stimulus Responsive Nanoparticles
AU  - Yanxia Zhou
AU  - Xinyue Cao
AU  - Xin Song
AU  - Lihua Xiao
AU  - Pengfei Cheng
AU  - Yi Wang
AU  - Rui Hu
AU  - Shuye Xiao
PY  - 2026
DA  - 2026/10/30
JO  - ACS Omega
DO  - 10.1021/acsomega.6c09021
UR  - https://pubs.acs.org/acsodf/article/doi/10.1021/acsomega.6c09021/5461485/Research-on-Reversible-Wetting-Regulation-and
AB  - Stimulus-responsive nanomaterials with reversibly switchable wettability are promising for separation and interfacial engineering. Here, polymer-modified silica nanoparticles (Si@(MO)NPs) grafted with MEO2MA-co-OEGMA were synthesized, showing dual salt- and acid-responsive wettability switching. High ionic strength induces dehydration and collapse of the polymer shell, switching wettability from hydrophilic to oleophilic and driving migration to the oil phase or interface; subsequent acid stimulation protonates carboxyl groups, restoring hydration and chain extension and enabling reverse migration to the aqueous phase. Molecular dynamics simulations show that increasing salt concentration reduces polymer–water hydrogen bonding and the radius of gyration while enhancing mobility toward the oil phase, whereas 5 wt % citric acid optimizes protonation, stabilizes extended chain conformations, and improves interfacial hydration and diffusion. These results establish a coupled hydration-conformation regulation mechanism for designing multistimuli-responsive nanomaterials.
SN  - 2470-1343
ER  -