Modification of Cellulose with Succinic Anhydride in TBAA/DMSO Mixed Solvent under Catalyst-Free Conditions

Xin, Ping-Ping; Huang, Yao‐Bing; Hse, Chung‐Yun; Cheng, H. N.; Huang, Chaobo; Pan, Hui

doi:10.3390/ma10050526

Cited by 24 publications

(16 citation statements)

References 58 publications

(76 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The degree of substitution and carboxyl content increased with the increasing content of TBAA in the binary solvent, which confirmed that more carboxyl groups were grafted onto the CNFs at higher TBAA contents. This result is also in agreement with our previous study on the homogenous modification of cellulose with succinic anhydride in the same reaction medium . Within a certain range, both the solubility and the dissolution rate of cellulose in the TBAA/DMSO mixed solvent increased with increasing TBAA content.…”

Section: Figuresupporting

confidence: 93%

“…Within a certain range, both the solubility and the dissolution rate of cellulose in the TBAA/DMSO mixed solvent increased with increasing TBAA content. As a result, the accessibility of modification reagent (i.e., cyclic anhydride) to the hydroxy groups on dissolved cellulose improved, which would increase the DS value of modified cellulose . This mechanism would also apply to the heterogeneous modification of cellulose in the TBAA/DMSO binary solvent, in which the acetate ions formed hydrogen bonds with the hydroxy groups on cellulose and therefore, to some extent, cleaved the intra‐ and intermolecular hydrogen bonds of cellulose chains.…”

Section: Figurementioning

confidence: 99%

“…This result is also in agreement with our previous study on the homogenous modificationo fc ellulose with succinic anhydride in the same reaction medium. [15] Within ac ertainr ange, both the solubility and the dissolution rate of cellulose in the TBAA/ DMSO mixed solvent increased with increasing TBAA content. As ar esult,t he accessibility of modificationr eagent (i.e.,c yclic anhydride) to the hydroxy groups on dissolved cellulose improved, which would increaset he DS value of modified cellulose.…”

mentioning

confidence: 95%

“…As ar esult,t he accessibility of modificationr eagent (i.e.,c yclic anhydride) to the hydroxy groups on dissolved cellulose improved, which would increaset he DS value of modified cellulose. [15] This mechanism would also apply to the heterogeneousm odificationo fc ellulose in the TBAA/DMSO binary solvent, in whicht he acetate ions formed hydrogen bonds with the hydroxy groups on cellulose and therefore, to some extent,c leaved the intra-and intermolecularh ydrogen bonds of cellulose chains.A sar esult, the pulp fiber started to swell or finally dissolved in the solventd epending on the amount of acetate ions or,i no ther words, the content of TBAA in the binary solvent. [16] The solid yield could provide another piece of evidencef or the swelling-to-dissolving of cellulose in TBAA/ DMSO binarys olvent.…”

mentioning

confidence: 99%

See 3 more Smart Citations

An Energy‐Efficient One‐Pot Swelling/Esterification Method to Prepare Cellulose Nanofibers with Uniform Diameter

et al. 2018

Self Cite

View full text Add to dashboard Cite

An energy-efficient method has been developed to prepare 3-5 nm-wide carboxyl-functionalized cellulose nanofibers (CNFs) from pulp fiber by a simple one-pot swelling followed by esterification process. Tetrabutylammonium acetate (TBAA)/dimethyl sulfoxide (DMSO) binary solvent is used as the swelling agent and the esterification medium admixed with maleic anhydride. All steps are performed at room temperature and no post-mechanical treatment is needed. The highly efficient defibrillation of pulp fiber to CNFs is thought to be due to two factors: 1) swelling in TBAA/DMSO effectively loosens the structure of cellulose supermolecules by breaking the intra- and intermolecular hydrogen bonds between cellulose chains; and 2) the carboxyl groups grafted onto the cellulose molecules by esterification prohibit the reformulation of hydrogen bonds between cellulose chains and therefore stabilize the disperse CNFs with uniform diameter in solution. Other than acid anhydride, no catalyst is added for the esterification, which facilitates the recycling and reuse of the binary solvent. This energy-efficient one-pot method could facilitate the large-scale manufacture of bio-based nanomaterials.

show abstract

Section: Figuresupporting

confidence: 93%

Section: Figurementioning

confidence: 99%

mentioning

confidence: 95%

mentioning

confidence: 99%

See 2 more Smart Citations

An Energy‐Efficient One‐Pot Swelling/Esterification Method to Prepare Cellulose Nanofibers with Uniform Diameter

et al. 2018

Self Cite

View full text Add to dashboard Cite

show abstract

“…Succinyl group consists of two carbonyl moieties, where it is expected to provide more electronegative sites compared to the carboxymethyl group. In work reported by Xin et al [ 20 ] and Zhu et al [ 11 ], succinyl cellulose and succinyl chitosan were successfully synthesized, respectively. However, the preparation methods were lengthy and tedious.…”

Section: Introductionmentioning

confidence: 99%

Effect of Active Site Modification towards Performance Enhancement in Biopolymer κ-Carrageenan Derivatives

et al. 2020

View full text Add to dashboard Cite

This research demonstrates a one-step modification process of biopolymer carrageenan active sites through functional group substitution in κ-carrageenan structures. The modification process improves the electronegative properties of κ-carrageenan derivatives, leading to enhancement of the material’s performance. Synthesized succinyl κ-carrageenan with a high degree of substitution provides more active sites for interaction with analytes. The FTIR analysis of succinyl κ-carrageenan showed the presence of new peaks at 1068 cm−1, 1218 cm−1, and 1626 cm−1 that corresponded to the vibrations of C–O and C=O from the carbonyl group. A new peak at 2.86 ppm in 1H NMR represented the methyl proton neighboring with C=O. The appearance of new peaks at 177.05 and 177.15 ppm in 13C NMR proves the substitution of the succinyl group in the κ-carrageenan structure. The elemental analysis was carried out to calculate the degree of substitution with the highest value of 1.78 at 24 h of reaction. The XRD diffractogram of derivatives exhibited a higher degree of crystallinity compared to pristine κ-carrageenan at 23.8% and 9.2%, respectively. Modification of κ-carrageenan with a succinyl group improved its interaction with ions and the conductivity of the salt solution compared to its pristine form. This work has a high potential to be applied in various applications such as sensors, drug delivery, and polymer electrolytes.

show abstract

Developing Porous Microneedles Patch for the Detection of Wound Infections

Xue,

Na,

Zhang

et al. 2023

Adv Materials Technologies

View full text Add to dashboard Cite

Wound infections caused by invasive pathogens become an increasing global challenge health. Porous microneedles (MNs) present distinctive advantages for non‐invasive and in situ detection of wound infections, enabling the extraction of interstitial fluid, skin sweat, saliva and other biological samples. Consequently, porous MNs find widespread acceptance in medical detection, drug delivery, and monitoring physiological indicators. Based on these advantages, the emerging clinical applications and classifications of MNs is first introduced, covering mechanical strength, methods for antibody probe modification onto porous MNs, and signal amplification techniques for biomarkers analysis. At the same time, the specific applications of immunology and electrochemistry on porous MNs, introducing methods to enhance the detection signal of target molecules, such as rolling circle amplification, gold/silver nanoparticles, fluorescence amplification origami microneedle and so on is try to summarized. The improvement of detection sensitivity is realized by integrating various signal amplification strategies and diverse detection methods. Meanwhile, it is briefly illustrated applications in wound detections. Finally, challenges and future prospects of using porous MNs for detection in practical applications is discussed.

show abstract

Modification of Cellulose with Succinic Anhydride in TBAA/DMSO Mixed Solvent under Catalyst-Free Conditions

Cited by 24 publications

References 58 publications

An Energy‐Efficient One‐Pot Swelling/Esterification Method to Prepare Cellulose Nanofibers with Uniform Diameter

An Energy‐Efficient One‐Pot Swelling/Esterification Method to Prepare Cellulose Nanofibers with Uniform Diameter

Effect of Active Site Modification towards Performance Enhancement in Biopolymer κ-Carrageenan Derivatives

Developing Porous Microneedles Patch for the Detection of Wound Infections

Contact Info

Product

Resources

About