Effect of hydration on the H-bond dynamics of adsorbed water in cellulose/polyethyleneimine nano-sponges probed by 2D-COS and PCMW2D two-dimensional FTIR correlation spectroscopy

被引：4

作者：

Paladini, Giuseppe ^{[1
]}

Caridi, Francesco ^{[2
]}

Majolino, Domenico ^{[2
]}

Fiorati, Andrea ^{[3
,4
]}

Venuti, Valentina ^{[2
]}

Punta, Carlo ^{[3
,4
]}

机构：

[1] Univ Catania, Dept Phys & Astron Ettore Majorana, Via S Sofia 64, I-95123 Catania, Italy

[2] Univ Messina, Dept Math & Comp Sci Phys Sci & Earth Sci, Vle Ferdinando Stagno DAlcontres 31, I-98166 Messina, Italy

[3] Politecn Milan, Dept Chem Mat & Chem Engn G Natta, Piazza Leonardo Vinci 32, I-20133 Milan, Italy

[4] Politecn Milan, INSTM Local Unit, Piazza Leonardo Vinci 32, I-20133 Milan, Italy

来源：

CELLULOSE | 2024年 / 31卷 / 08期

关键词：

Cellulose nano-sponges; Hydration; H-bond dynamics; FTIR-ATR; 2D-COS; PCMW2D; CHEMICAL FUNCTIONALIZATION; CELLULOSE NANOCRYSTALS; STRUCTURAL ELUCIDATION; FIBRILLATED CELLULOSE; RAMAN-SPECTRA; KINETICS; FIBERS; TOOL;

D O I：

10.1007/s10570-024-05849-1

中图分类号：

TB3 [工程材料学]; TS [轻工业、手工业、生活服务业];

学科分类号：

0805 ; 080502 ; 0822 ;

摘要：

In this work, generalized (2D-COS) and perturbation-correlation moving window (PCMW2D) two-dimensional correlation analyses were applied on a set of hydration-dependent Fourier Transform Infrared Spectroscopy in Attenuated Total Reflectance Geometry (FTIR-ATR) data of cellulose nano-sponges (CNSs) consisting of TEMPO-oxidized cellulose nanofibrils (TOCNF) as three-dimensional scaffolds, and branched polyethyleneimine (bPEI) as cross-linker. The aim was to get insights, starting from the computation of synchronous (SCMs) and asynchronous (ACMs) 2D-COS and PCMW2D correlation maps, into the effect of hydration on the hydrogen bond (H-bond) dynamics of water molecules closely attached to the cellulose nanofibrils (interfacial water), based on the assessment of the complex sequence of events affecting the O-H modes of the CNS material at different bPEI:TOCNF (w/w) ratios. The possibility to highlight the time-dependent dynamical evolution exhibited by complex cellulose-based materials, not accessible through conventional 1D FTIR-ATR analysis, can provide useful notions for the development and optimization of CNSs-based devices for different applications, including water remediation, drug-delivery and heterogeneous catalysis.

引用

页码：4775 / 4791

页数：17

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