Green Hydrophobic Modification of Biomass-Derived Porous Carbon: Linking Surface Chemistry, Pore Structure, and Sustainability
- 1School of Art and Media, Guangzhou Vocational University of Science and Technology, Guangzhou 510550, China
- 2Guangdong Provincial Engineering Research Center of Public Health Detection and Assessment, School of Public Health, Guangdong Pharmaceutical University, Guangzhou 510310, China
Abstract
The hydrophobic modification of biomass-based porous carbon involves two theoretical paradigms—“exogenous coating” and “surface-confined covalent transformation”—but the underlying logical transition between them has not yet been systematically examined. This study employs a theoretical dialectical approach. Through the deconstruction of the concept of “green hydrophobic modification,” the deduction of progressive propositions, and a critical dialogue with existing research, we have constructed a three-dimensional integrated analytical framework comprising “chemical logic—spatial effects—green attributes.” The study found that the efficacy of hydrophobic modification is constrained by the synergistic contradiction between the degree of surface chemical transformation and the preservation of pore structure; exogenous modifications, such as silanization and fluorination, tend to fall into a “hydrophobicity–pore” trade-off whose severity depends on the modifier molecular size, degree of functionalization, grafting density, pore size distribution, and alkyl chain length, due to the coverage by a heterogeneous hydrophobic layer, whereas surface-confined covalent esterification based on esterification with natural organic acids directly converts oxygen-containing functional groups on the carbon surface into ester groups, achieving logical consistency between hydrophobic functionality and pore structure preservation. The study further reveals that the surface-confined covalent esterification paradigm holds a significant advantage in terms of alignment with green chemistry principles, though its applicability is limited by the abundance of surface functional groups on the carbon precursor. These findings provide clear criteria for evaluating paradigms in the green hydrophobic modification of biomass-derived porous carbon, propelling related research from methodological description toward theoretical construction. A three-way classification of modification routes is introduced (exogenous coating; exogenous reagent + surface-confined covalent transformation; truly endogenous transformation), and the verification requirements (solid-state NMR/XPS), pore-sensitive wettability metrics, and hydrolytic-stability limits of surface-confined covalent esterification are explicitly delimited.
Related
- Hydrophobic Microfibrillated Cellulose Aerogels via Dual-Silane Modification for Sustainable Oil Spill Recovery.
- Role of chemistry changes in the hydrophobic transition following femtosecond laser texturing of stainless steel
- Solvent-Dependent Selective Retention of Essential-Oil Markers and Modification of the Thymol-Type Chemical Fingerprint in Post-Extraction Thymus vulgaris L. Biomass
- Catalyst–Support Interactions in Carbon–Inorganic Hybrid Catalysts for Biomass Valorization: Interfacial Chemistry, Stability, and Regeneration
- Waste-Derived Natural Polymer Biosorbents for Toxic Metal Ions: Structure–Sorption Relationships, Modification Strategies, and Prospects for Solid-Phase Sensing
BibTeX
@article{wang2026green,
title = {{Green Hydrophobic Modification of Biomass-Derived Porous Carbon: Linking Surface Chemistry, Pore Structure, and Sustainability}},
author = {Xiaohong Wang and Jingxin Wang},
journal = {Molecules},
year = {2026},
month = oct,
doi = {10.3390/molecules31203684},
url = {https://www.mdpi.com/1420-3049/31/20/3684},
note = {CC BY 4.0},
}
RIS
TY - JOUR
TI - Green Hydrophobic Modification of Biomass-Derived Porous Carbon: Linking Surface Chemistry, Pore Structure, and Sustainability
AU - Xiaohong Wang
AU - Jingxin Wang
PY - 2026
DA - 2026/10/01
JO - Molecules
DO - 10.3390/molecules31203684
UR - https://www.mdpi.com/1420-3049/31/20/3684
AB - The hydrophobic modification of biomass-based porous carbon involves two theoretical paradigms—“exogenous coating” and “surface-confined covalent transformation”—but the underlying logical transition between them has not yet been systematically examined. This study employs a theoretical dialectical approach. Through the deconstruction of the concept of “green hydrophobic modification,” the deduction of progressive propositions, and a critical dialogue with existing research, we have constructed a three-dimensional integrated analytical framework comprising “chemical logic—spatial effects—green attributes.” The study found that the efficacy of hydrophobic modification is constrained by the synergistic contradiction between the degree of surface chemical transformation and the preservation of pore structure; exogenous modifications, such as silanization and fluorination, tend to fall into a “hydrophobicity–pore” trade-off whose severity depends on the modifier molecular size, degree of functionalization, grafting density, pore size distribution, and alkyl chain length, due to the coverage by a heterogeneous hydrophobic layer, whereas surface-confined covalent esterification based on esterification with natural organic acids directly converts oxygen-containing functional groups on the carbon surface into ester groups, achieving logical consistency between hydrophobic functionality and pore structure preservation. The study further reveals that the surface-confined covalent esterification paradigm holds a significant advantage in terms of alignment with green chemistry principles, though its applicability is limited by the abundance of surface functional groups on the carbon precursor. These findings provide clear criteria for evaluating paradigms in the green hydrophobic modification of biomass-derived porous carbon, propelling related research from methodological description toward theoretical construction. A three-way classification of modification routes is introduced (exogenous coating; exogenous reagent + surface-confined covalent transformation; truly endogenous transformation), and the verification requirements (solid-state NMR/XPS), pore-sensitive wettability metrics, and hydrolytic-stability limits of surface-confined covalent esterification are explicitly delimited.
SN - 1420-3049
ER -