Carbohydrate Polymers最新文献

英文中文

Pattern of substitution affects the extractability and enzymatic deconstruction of xylan from Eucalyptus wood

IF 10.7 1区化学 Q1 CHEMISTRY, APPLIED

Carbohydrate Polymers

Pub Date : 2025-01-10 DOI: 10.1016/j.carbpol.2025.123246

Emilia Heinonen , Pramod Sivan , Amparo Jiménez-Quero , Mikael E. Lindström , Jakob Wohlert , Gunnar Henriksson , Francisco Vilaplana

Glucuronoxylan is the main hemicellulose in the secondary cell wall of angiosperms. Elucidating its molecular structure provides a basis for more accurate plant cell wall models and the utilization of xylan in biorefinery processes. Here, we investigated the spacing of acetyl, glucuronopyranosyl and galactopyranosyl substitutions on Eucalyptus glucuronoxylan using sequential extraction combined with enzymatic hydrolysis and mass spectrometry. We found that the acetyl groups are preferentially spaced with an even pattern and that consecutive acetylation is present as a minor motif. Distinct odd and even patterns of glucuronidation with tight and sparse spacing were observed. Furthermore, the occurrence of consecutive glucuronidation is reported, which adds to the growing body of evidence that this motif is not only present in gymnosperms but also in angiosperms. In addition, the presence of terminal galactopyranosyl units, which can be released by β-galactosidase, altered the digestibility of the glucuronoxylan by GH30 and GH10 xylanase and appeared to be clustered within the polymeric backbone. These findings increase our understanding of the complex structure of glucuronoxylans and its effect on the extractability and biological degradation of Eucalyptus wood.

{"title":"Pattern of substitution affects the extractability and enzymatic deconstruction of xylan from Eucalyptus wood","authors":"Emilia Heinonen , Pramod Sivan , Amparo Jiménez-Quero , Mikael E. Lindström , Jakob Wohlert , Gunnar Henriksson , Francisco Vilaplana","doi":"10.1016/j.carbpol.2025.123246","DOIUrl":"10.1016/j.carbpol.2025.123246","url":null,"abstract":"<div><div>Glucuronoxylan is the main hemicellulose in the secondary cell wall of angiosperms. Elucidating its molecular structure provides a basis for more accurate plant cell wall models and the utilization of xylan in biorefinery processes. Here, we investigated the spacing of acetyl, glucuronopyranosyl and galactopyranosyl substitutions on <em>Eucalyptus</em> glucuronoxylan using sequential extraction combined with enzymatic hydrolysis and mass spectrometry. We found that the acetyl groups are preferentially spaced with an even pattern and that consecutive acetylation is present as a minor motif. Distinct odd and even patterns of glucuronidation with tight and sparse spacing were observed. Furthermore, the occurrence of consecutive glucuronidation is reported, which adds to the growing body of evidence that this motif is not only present in gymnosperms but also in angiosperms. In addition, the presence of terminal galactopyranosyl units, which can be released by <em>β</em>-galactosidase, altered the digestibility of the glucuronoxylan by GH30 and GH10 xylanase and appeared to be clustered within the polymeric backbone. These findings increase our understanding of the complex structure of glucuronoxylans and its effect on the extractability and biological degradation of <em>Eucalyptus</em> wood.</div></div>","PeriodicalId":261,"journal":{"name":"Carbohydrate Polymers","volume":"353 ","pages":"Article 123246"},"PeriodicalIF":10.7,"publicationDate":"2025-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143290779","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Elucidation of molecular recognition of catecholamine enantiomer by cyclodextrin combined ion mobility spectrometry and theoretical calculation

IF 10.7 1区化学 Q1 CHEMISTRY, APPLIED

Carbohydrate Polymers

Pub Date : 2025-01-10 DOI: 10.1016/j.carbpol.2025.123260

Jianglong Du , Yanqiu Chu , Yinghua Yan , Zhenhua Li , Chuan-Fan Ding

Catecholamines, as important neurotransmitter and clinical drugs, have a wide range of regulatory roles in physiological activities. The recognition of catecholamine enantiomer (CE) and the elucidation of recognition mechanism are of great significance for the in-depth understanding of biomolecular interactions. This work reveals the molecular recognition mechanism of cyclodextrin (CD) towards CEs through experimental measurements of ion mobility spectrometry (IMS) and theoretical studies including molecular dynamics (MD) simulation and quantum chemical (QC) calculation. The CEs can be discriminated by constructing multi-nary non-covalent complex with CDs by IMS. MD simulation confirm the binding behavior and conformation preference of binary complexes with CEs and α-CD, and further QC calculation optimize the gas-phase ion structure, demonstrate the differences in geometry and energy. Visualization of non-covalent interactions (NCI) resolve the regions and features of intermolecular interactions and illustrate that recognition originates from different contribution of hydrogen bonds between the chiral center of CE and the larger rim of α-CD. Further topological analysis indicates that the difference in the sum of effective hydrogen bond energies has a positive correlation with the recognition efficiency. This work provides new approach for structure elucidation of supramolecular complexes and mechanism elucidation of molecular recognition under the guidance of IMS.

{"title":"Elucidation of molecular recognition of catecholamine enantiomer by cyclodextrin combined ion mobility spectrometry and theoretical calculation","authors":"Jianglong Du , Yanqiu Chu , Yinghua Yan , Zhenhua Li , Chuan-Fan Ding","doi":"10.1016/j.carbpol.2025.123260","DOIUrl":"10.1016/j.carbpol.2025.123260","url":null,"abstract":"<div><div>Catecholamines, as important neurotransmitter and clinical drugs, have a wide range of regulatory roles in physiological activities. The recognition of catecholamine enantiomer (CE) and the elucidation of recognition mechanism are of great significance for the in-depth understanding of biomolecular interactions. This work reveals the molecular recognition mechanism of cyclodextrin (CD) towards CEs through experimental measurements of ion mobility spectrometry (IMS) and theoretical studies including molecular dynamics (MD) simulation and quantum chemical (QC) calculation. The CEs can be discriminated by constructing multi-nary non-covalent complex with CDs by IMS. MD simulation confirm the binding behavior and conformation preference of binary complexes with CEs and α-CD, and further QC calculation optimize the gas-phase ion structure, demonstrate the differences in geometry and energy. Visualization of non-covalent interactions (NCI) resolve the regions and features of intermolecular interactions and illustrate that recognition originates from different contribution of hydrogen bonds between the chiral center of CE and the larger rim of α-CD. Further topological analysis indicates that the difference in the sum of effective hydrogen bond energies has a positive correlation with the recognition efficiency. This work provides new approach for structure elucidation of supramolecular complexes and mechanism elucidation of molecular recognition under the guidance of IMS.</div></div>","PeriodicalId":261,"journal":{"name":"Carbohydrate Polymers","volume":"353 ","pages":"Article 123260"},"PeriodicalIF":10.7,"publicationDate":"2025-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143290854","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A highly compressible and expandable cellulose sponge with arch-like lamellar structures for non-compressible hemorrhage

IF 10.7 1区化学 Q1 CHEMISTRY, APPLIED

Carbohydrate Polymers

Pub Date : 2025-01-10 DOI: 10.1016/j.carbpol.2025.123255

Bingjing Cai, Yawen Fan, Shuo Yang, Chaoqun Che, Xiaoyun Li, Xiaoying Wang

The development of highly expandable sponges for non-compressible hemorrhage remains a challenge in both civilian and war scenarios. Herein, a cellulose-based highly expandable sponge with arch-like lamellar structure was prepared by introducing interlayer calcium ion cross-linking in the sponges obtained by bi-directional freezing. The cellulose sponge, which has an arched layered structure that can withstand large stress strain, is compressed into small sizes to enter narrow and deep bleeding points, and then expand about 11 times after liquid absorption to apply sufficient and constant pressure on the bleeding points. The sponge can quickly absorb a large amount of blood, causing blood cells to aggregate, and activate the coagulation pathway through carboxyl groups and calcium ions, and exhibit effective hemostatic performance in rat liver defect and femoral artery hemostasis models (blood loss was reduced to about 6.3 % compared with the untreated group). In conclusion, this highly compressible and expandable cellulose sponge with an arch-like lamellar structure is expected to be used for hemostasis of non-compressible hemorrhages.

{"title":"A highly compressible and expandable cellulose sponge with arch-like lamellar structures for non-compressible hemorrhage","authors":"Bingjing Cai, Yawen Fan, Shuo Yang, Chaoqun Che, Xiaoyun Li, Xiaoying Wang","doi":"10.1016/j.carbpol.2025.123255","DOIUrl":"10.1016/j.carbpol.2025.123255","url":null,"abstract":"<div><div>The development of highly expandable sponges for non-compressible hemorrhage remains a challenge in both civilian and war scenarios. Herein, a cellulose-based highly expandable sponge with arch-like lamellar structure was prepared by introducing interlayer calcium ion cross-linking in the sponges obtained by bi-directional freezing. The cellulose sponge, which has an arched layered structure that can withstand large stress strain, is compressed into small sizes to enter narrow and deep bleeding points, and then expand about 11 times after liquid absorption to apply sufficient and constant pressure on the bleeding points. The sponge can quickly absorb a large amount of blood, causing blood cells to aggregate, and activate the coagulation pathway through carboxyl groups and calcium ions, and exhibit effective hemostatic performance in rat liver defect and femoral artery hemostasis models (blood loss was reduced to about 6.3 % compared with the untreated group). In conclusion, this highly compressible and expandable cellulose sponge with an arch-like lamellar structure is expected to be used for hemostasis of non-compressible hemorrhages.</div></div>","PeriodicalId":261,"journal":{"name":"Carbohydrate Polymers","volume":"353 ","pages":"Article 123255"},"PeriodicalIF":10.7,"publicationDate":"2025-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143290780","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Immunologically active cell wall polysaccharides of green microalga Dictyosphaerium chlorelloides (Chlorellacea)

IF 10.7 1区化学 Q1 CHEMISTRY, APPLIED

Carbohydrate Polymers

Pub Date : 2025-01-09 DOI: 10.1016/j.carbpol.2025.123242

Leonid Sushytskyi , Andriy Synytsya , Pavol Lukáč , Lenka Rajsiglová , Peter Capek , Radek Pohl , Roman Bleha , Luca E. Vannucci , Daniel Smrz , Jana Čopíková , Petr Kaštánek

Dictyosphaerium chlorelloides is a green microalga from the Chlorella clade that produces highly viscous exocellular polysaccharides. The cell wall polysaccharides of this alga have not been studied in detail. In this article, water-soluble polysaccharides from D. chlorelloides biomass were extracted with hot water and purified by preparative chromatography. The composition, structural features and molecular masses of subsequently eluted fractions F1, F2, F3, F4 and F5 (minor) were determined. Three high-yield products F1, F3 and F4 consisted mainly of galactopyranosyl, 2-O-methyl-galactopyranosyl, rhamnopyranosyl and mannopyranosyl units at different proportions, while F2 was rich in glucose. Immunoactivity of these fractions was evidenced in a mixed population of immune cells derived from mice spleens after incubation with polysaccharides by flow cytometry, MTT and Immunospot assays. These fractions, except F2, demonstrated selective immunostimulant activity, and the F1 fraction induced the most potent effect, closely followed by the F3 and F4 fractions. The in vivo mechanism of their action is associated with the activation of innate immunity and shapes the immune response to the Th1 type.

{"title":"Immunologically active cell wall polysaccharides of green microalga Dictyosphaerium chlorelloides (Chlorellacea)","authors":"Leonid Sushytskyi , Andriy Synytsya , Pavol Lukáč , Lenka Rajsiglová , Peter Capek , Radek Pohl , Roman Bleha , Luca E. Vannucci , Daniel Smrz , Jana Čopíková , Petr Kaštánek","doi":"10.1016/j.carbpol.2025.123242","DOIUrl":"10.1016/j.carbpol.2025.123242","url":null,"abstract":"<div><div><em>Dictyosphaerium chlorelloides</em> is a green microalga from the <em>Chlorella</em> clade that produces highly viscous exocellular polysaccharides. The cell wall polysaccharides of this alga have not been studied in detail. In this article, water-soluble polysaccharides from <em>D. chlorelloides</em> biomass were extracted with hot water and purified by preparative chromatography. The composition, structural features and molecular masses of subsequently eluted fractions <strong>F1</strong>, <strong>F2</strong>, <strong>F3</strong>, <strong>F4</strong> and <strong>F5</strong> (minor) were determined. Three high-yield products <strong>F1</strong>, <strong>F3</strong> and <strong>F4</strong> consisted mainly of galactopyranosyl, 2-<em>O</em>-methyl-galactopyranosyl, rhamnopyranosyl and mannopyranosyl units at different proportions, while <strong>F2</strong> was rich in glucose. Immunoactivity of these fractions was evidenced in a mixed population of immune cells derived from mice spleens after incubation with polysaccharides by flow cytometry, MTT and Immunospot assays. These fractions, except <strong>F2</strong>, demonstrated selective immunostimulant activity, and the <strong>F1</strong> fraction induced the most potent effect, closely followed by the <strong>F3</strong> and <strong>F4</strong> fractions. The in vivo mechanism of their action is associated with the activation of innate immunity and shapes the immune response to the Th1 type.</div></div>","PeriodicalId":261,"journal":{"name":"Carbohydrate Polymers","volume":"353 ","pages":"Article 123242"},"PeriodicalIF":10.7,"publicationDate":"2025-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143290788","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Corrigendum to “Acidic polysaccharide from the edible insect Protaetia brevitarsis seulensis activates antiviral immunity to suppress norovirus infection” [Carbohydrate Polymers 347 (2025) 122587]

IF 10.7 1区化学 Q1 CHEMISTRY, APPLIED

Carbohydrate Polymers

Pub Date : 2025-01-09 DOI: 10.1016/j.carbpol.2024.123188

Ibukunoluwa Fola Olawuyi , Eun Heo , Minju Jeong , Jae Hwan Kim , Jong-Jin Park , Jongbeom Chae , Subin Gwon , Seong Do Lee , Hunseong Kim , Oyindamola Vivian Ojulari , Young-Bo Song , Byung-Hoo Lee , Bon Bin Gu , Soo Rin Kim , Joon Ha Lee , Wonyoung Lee , Jae Sam Hwang , Ju-Ock Nam , Dongyup Hahn , Sanguine Byun

引用次数: 0

Chitosan cryogels incorporated with phytic acid-modified UiO-66-NH2 for enhanced flame-retardant performance

IF 10.7 1区化学 Q1 CHEMISTRY, APPLIED

Carbohydrate Polymers

Pub Date : 2025-01-09 DOI: 10.1016/j.carbpol.2025.123259

Chenfei Wang , Bing Yu , Tong Zhao , Fan Yang , Muhua Chen , Xinbao Zhu , Zhengchun Cai , Bo Fu

In this work, chitosan (CS) was used as the skeleton to synthesize flame-retardant composite cryogels. Phytic acid (PA)-modified Zr-based metal-organic framework (PA-UiO-66-NH₂) was integrated into the CS network to enhance flame retardant performance. The vertical combustion test (UL-94) grade was V-0, and the limiting oxygen index (LOI) value reached 39 % when the flame retardant (PA-UiO-66-NH₂) addition content was 15 %. Cone calorimetry tests demonstrated that the inclusion of PA-UiO-66-NH₂ significantly decreased the heat release and smoke generation, facilitating the formation of a compact carbon layer on the cryogels. With a thermal conductivity of 0.03447 W/(m·K), the modified CS-15PA-UiO-66-NH₂ cryogels maintained their superior thermal insulating capabilities as compared to the pristine cryogels. The water contact angle of the cryogels hydrophobically modified with methyl trichlorosilane (MTCS) was 135.3° ± 2.3°. This study presents cryogels with excellent flame retardancy, and such material is expected to replace conventional petroleum products in energy storage and building insulation.

{"title":"Chitosan cryogels incorporated with phytic acid-modified UiO-66-NH2 for enhanced flame-retardant performance","authors":"Chenfei Wang , Bing Yu , Tong Zhao , Fan Yang , Muhua Chen , Xinbao Zhu , Zhengchun Cai , Bo Fu","doi":"10.1016/j.carbpol.2025.123259","DOIUrl":"10.1016/j.carbpol.2025.123259","url":null,"abstract":"<div><div>In this work, chitosan (CS) was used as the skeleton to synthesize flame-retardant composite cryogels. Phytic acid (PA)-modified Zr-based metal-organic framework (PA-UiO-66-NH<sub>2</sub>) was integrated into the CS network to enhance flame retardant performance. The vertical combustion test (UL-94) grade was V-0, and the limiting oxygen index (LOI) value reached 39 % when the flame retardant (PA-UiO-66-NH<sub>2</sub>) addition content was 15 %. Cone calorimetry tests demonstrated that the inclusion of PA-UiO-66-NH<sub>2</sub> significantly decreased the heat release and smoke generation, facilitating the formation of a compact carbon layer on the cryogels. With a thermal conductivity of 0.03447 W/(m·K), the modified CS-15PA-UiO-66-NH<sub>2</sub> cryogels maintained their superior thermal insulating capabilities as compared to the pristine cryogels. The water contact angle of the cryogels hydrophobically modified with methyl trichlorosilane (MTCS) was 135.3° ± 2.3°. This study presents cryogels with excellent flame retardancy, and such material is expected to replace conventional petroleum products in energy storage and building insulation.</div></div>","PeriodicalId":261,"journal":{"name":"Carbohydrate Polymers","volume":"353 ","pages":"Article 123259"},"PeriodicalIF":10.7,"publicationDate":"2025-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143290703","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Alginate-based hydrogel beads for ultrasensitive detection and effective adsorption of terbium and europium in water

IF 10.7 1区化学 Q1 CHEMISTRY, APPLIED

Carbohydrate Polymers

Pub Date : 2025-01-09 DOI: 10.1016/j.carbpol.2025.123258

Jun Wang , Xin Lan , Wenjing Shi, Zhiming Chen

Developing sustainable difunctional materials that allow for selective visual detection and efficient removal of rare earth elements ions (REE³⁺) is crucial for fostering an eco-friendly economy and protecting the environment. However, achieving both dual functionalities represents a significant challenge. In this work, we fabricated a unique hydrogel bead (DPA/GB) characterized by a high density of carboxyl groups and pyridine nitrogen atoms, through the hybridization of dipicolinic acid (DPA) and sodium alginate (SA) with calcium as a cross-linker. Notably, the cost of DPA/GB is only USD 0.25 per gram. The resulting bead exhibited fluorescence turn-on capability and on-site detection for terbium (Tb³⁺) and europium (Eu³⁺), with exceptional anti-interference ability. Furthermore, their limits of detection (LOD) were determined to be 0.23 and 0.85 nM over a wide concentration range of 0.2–1000/6–600 μM for Tb³⁺/Eu³⁺. DPA/GB demonstrated a higher adsorption capacity for Tb³⁺ (270 mg/g) and Eu³⁺ (301 mg/g) at pH = 5.02. Infrared spectroscopy, X-ray photoelectron spectroscopy, thermogravimetric analysis, and energy-dispersive spectroscopic analysis were performed to gain insight into the underlying mechanisms. These studies confirmed the synergistic effects of complexation, electrostatic interaction, and ion exchange between Tb³⁺/Eu³⁺ and DPA/GB. This work presents an innovative and viable approach for the luminescence detection and efficient adsorption of Tb³⁺/Eu³⁺ in water.

Hypothesis statement

Alginate-based sustainable materials modified by the non-covalent assembly strategy facilitate the visual detection and efficient adsorption of terbium and europium ions simultaneously, aiming to advance the development of polysaccharide-based multifunctional adsorbent materials.

{"title":"Alginate-based hydrogel beads for ultrasensitive detection and effective adsorption of terbium and europium in water","authors":"Jun Wang , Xin Lan , Wenjing Shi, Zhiming Chen","doi":"10.1016/j.carbpol.2025.123258","DOIUrl":"10.1016/j.carbpol.2025.123258","url":null,"abstract":"<div><div>Developing sustainable difunctional materials that allow for selective visual detection and efficient removal of rare earth elements ions (REE<sup>3+</sup>) is crucial for fostering an eco-friendly economy and protecting the environment. However, achieving both dual functionalities represents a significant challenge. In this work, we fabricated a unique hydrogel bead (<strong>DPA/GB</strong>) characterized by a high density of carboxyl groups and pyridine nitrogen atoms, through the hybridization of dipicolinic acid (DPA) and sodium alginate (SA) with calcium as a cross-linker. Notably, the cost of <strong>DPA/GB</strong> is only USD 0.25 per gram. The resulting bead exhibited fluorescence turn-on capability and on-site detection for terbium (Tb<sup>3+</sup>) and europium (Eu<sup>3+</sup>), with exceptional anti-interference ability. Furthermore, their limits of detection (LOD) were determined to be 0.23 and 0.85 nM over a wide concentration range of 0.2–1000/6–600 μM for Tb<sup>3+</sup>/Eu<sup>3+</sup>. <strong>DPA/GB</strong> demonstrated a higher adsorption capacity for Tb<sup>3+</sup> (270 mg/g) and Eu<sup>3+</sup> (301 mg/g) at pH = 5.02. Infrared spectroscopy, X-ray photoelectron spectroscopy, thermogravimetric analysis, and energy-dispersive spectroscopic analysis were performed to gain insight into the underlying mechanisms. These studies confirmed the synergistic effects of complexation, electrostatic interaction, and ion exchange between Tb<sup>3+</sup>/Eu<sup>3+</sup> and <strong>DPA/GB</strong>. This work presents an innovative and viable approach for the luminescence detection and efficient adsorption of Tb<sup>3+</sup>/Eu<sup>3+</sup> in water.</div></div><div><h3>Hypothesis statement</h3><div>Alginate-based sustainable materials modified by the non-covalent assembly strategy facilitate the visual detection and efficient adsorption of terbium and europium ions simultaneously, aiming to advance the development of polysaccharide-based multifunctional adsorbent materials.</div></div>","PeriodicalId":261,"journal":{"name":"Carbohydrate Polymers","volume":"353 ","pages":"Article 123258"},"PeriodicalIF":10.7,"publicationDate":"2025-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143290787","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The preparation and characterization of pineapple peel cellulose nanofibers and its application in oil-water emulsions

IF 10.7 1区化学 Q1 CHEMISTRY, APPLIED

Carbohydrate Polymers

Pub Date : 2025-01-09 DOI: 10.1016/j.carbpol.2025.123245

Yongqi Tian , Ruyang Huang , Yuanyuan Chen, Tao Wang, Jiulin Wu, Shaoyun Wang

This study explored the potential of pineapple peel waste as a sustainable source of cellulose nanofibers (CNF) for Pickering emulsion stabilization. Pineapple peel cellulose, enzymatically extracted and subsequently TEMPO-oxidized and sonicated to produce TEMPO-oxidized cellulose nanofibers (TC), was investigated as an emulsifier. The effects of TC concentrations (0.2, 0.4, 0.6, 0.8, and 1.0 % wt%) and oil phase volumes (20 %, 30 %, 40 %, and 50 %) on rheological properties, and emulsion stability were determined. Results demonstrated that increasing TC concentration significantly enhanced emulsion stability through the formation of a cohesive three-dimensional network structure. This stability was maintained across a broad range of pH, ionic strength, and temperature. Molecular dynamics simulations supported these findings, revealing that TC enhances emulsion stability through favorable intermolecular interactions. This work highlights the potential of pineapple peel-derived CNF as a sustainable and high-performing alternative for emulsion stabilization applications.

{"title":"The preparation and characterization of pineapple peel cellulose nanofibers and its application in oil-water emulsions","authors":"Yongqi Tian , Ruyang Huang , Yuanyuan Chen, Tao Wang, Jiulin Wu, Shaoyun Wang","doi":"10.1016/j.carbpol.2025.123245","DOIUrl":"10.1016/j.carbpol.2025.123245","url":null,"abstract":"<div><div>This study explored the potential of pineapple peel waste as a sustainable source of cellulose nanofibers (CNF) for Pickering emulsion stabilization. Pineapple peel cellulose, enzymatically extracted and subsequently TEMPO-oxidized and sonicated to produce TEMPO-oxidized cellulose nanofibers (TC), was investigated as an emulsifier. The effects of TC concentrations (0.2, 0.4, 0.6, 0.8, and 1.0 % wt%) and oil phase volumes (20 %, 30 %, 40 %, and 50 %) on rheological properties, and emulsion stability were determined. Results demonstrated that increasing TC concentration significantly enhanced emulsion stability through the formation of a cohesive three-dimensional network structure. This stability was maintained across a broad range of pH, ionic strength, and temperature. Molecular dynamics simulations supported these findings, revealing that TC enhances emulsion stability through favorable intermolecular interactions. This work highlights the potential of pineapple peel-derived CNF as a sustainable and high-performing alternative for emulsion stabilization applications.</div></div>","PeriodicalId":261,"journal":{"name":"Carbohydrate Polymers","volume":"353 ","pages":"Article 123245"},"PeriodicalIF":10.7,"publicationDate":"2025-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143290789","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Superhydrophobic sponge-like chitosan/CNTs/silica composite for selective oil absorption and efficient separation of water-in-oil emulsion

IF 10.7 1区化学 Q1 CHEMISTRY, APPLIED

Carbohydrate Polymers

Pub Date : 2025-01-09 DOI: 10.1016/j.carbpol.2025.123256

Chu Xu , Huaqiang He , Yuan Wang , Yaoqi Huang , Tian C. Zhang , Shaojun Yuan

Developing state-of-the-art materials with durability, superhydrophobicity, and superoleophilicity is essential for effective cleanup of oil spills and the treatment of oily wastewater. In this study, a novel superhydrophobic/superoleophilic chitosan-based composite was created by incorporating carbon nanotubes (CNTs) into a chitosan (CS) matrix and depositing superhydrophobic SiO₂ nanoparticles, forming a sponge-like absorbent (SH-SiO₂@3CNTs/CS) for selective oil absorption and efficient oil/water separation. The optimal CNTs incorporation was comprehensively investigated to enhance the structural stability and mechanical strength of the chitosan/CNTs/silica composite. The size and loading of in-situ-grown SiO₂ nanoparticles on the chitosan/CNTs composite surface were identified as crucial factors in achieving surface superhydrophobicity. The optimized SH-SiO₂@3CNTs/CS, with its three-dimensional porous structure, exhibited not only superhydrophobicity and superoleophilicity, but also high chemical stability, excellent resistance to high temperature and friction. Notably, the SH-SiO₂@3CNTs/CS composite effectively absorbed oil with a capacity of up to 18.24 times its own weight and selectively separated oil/water mixtures and water-in-oil emulsions, achieving a separation efficiency of exceeding 97 % under vacuum pump conditions. This study not only introduces a novel approach for developing superoleophilic chitosan-based sponge-like composite materials, but also presents a promising strategy for selective oil absorption and efficient separation of water-in-oil emulsions.

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引用次数: 0

Durable PVA-based hydrogel sponge with cellulose whiskers embedded in the 3D interconnected channels for efficient oil/water separation

IF 10.7 1区化学 Q1 CHEMISTRY, APPLIED

Carbohydrate Polymers

Pub Date : 2025-01-09 DOI: 10.1016/j.carbpol.2025.123251

Zeqi Liu , Ran Li , Yarui Hou , Juan Guo , Xiaojun Li , Kai Li , Qingye Liu

Superhydrophilic hydrogel was typically used as the membrane coating on various substrates for oil/water separation. Nevertheless, these coatings may suffer from such limitations as poor adhesion strength and abrasion-resistance. Thus, the facile construction of hydrogel sponge with 3D connecting channels would be an ideal choice. Herein, we reported a free-standing polyvinyl alcohol (PVA)/cellulose nanocrystal (CNC) hydrogel sponge for controllable oil/water separation. In the design, the salt/CNC hybrid crystals instead of conventional salt particles were employed as the sacrificial template, thus CNC was creatively integrated into the long and tortuous 3D interconnected channels via the solvent displacement combined template-leaching strategy. The resultant microstructure woven by CNC bundles in sponge channels could alleviate severe pore collapse in leaching process and oil intrusion. Moreover, it could serve as the superhydrophilic “sieve”, promoting the separation efficiency significantly. The gravity-based separation efficiencies for PC₅-HL hydrogel sponge in processing of diverse oil/water mixture and oil-in-water emulsions could achieve up to 99.7 and 99.4 %, respectively. In addition, this hydrogel sponge can be used for continuous oil/water separation without obvious decline upon several cycles. This work provides a different way to fabricate the eco-friendly, low-cost and energy-saving filtration hydrogel sponge, showing high potential in oily wastewater treatment.

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