Carbohydrate Polymer Technologies and Applications最新文献

Influence of consumption of unsaturated alginate oligosaccharides on the gut microbiota and the intestinal mucosal immunity homeostasis in immunocompromised mice 食用不饱和海藻酸寡糖对免疫缺陷小鼠肠道微生物群和肠粘膜免疫平衡的影响

IF 6.2

Carbohydrate Polymer Technologies and Applications Pub Date : 2024-11-12 DOI: 10.1016/j.carpta.2024.100604

Zhaopeng Shen , Hua Yin , Lu Sun , Lu Chen , Jiandong Li , Xin Zhang , Mingyong Zeng , Xiaolu Jiang , Junhong Yu

{"title":"Influence of consumption of unsaturated alginate oligosaccharides on the gut microbiota and the intestinal mucosal immunity homeostasis in immunocompromised mice","authors":"Zhaopeng Shen , Hua Yin , Lu Sun , Lu Chen , Jiandong Li , Xin Zhang , Mingyong Zeng , Xiaolu Jiang , Junhong Yu","doi":"10.1016/j.carpta.2024.100604","DOIUrl":"10.1016/j.carpta.2024.100604","url":null,"abstract":"<div><div>Despite the well-known health benefits of unsaturated alginate oligosaccharides (UAOS), limited information exists on how they regulate the gut microbiota and intestinal mucosal immunity. In this study, UAOS was produced by alginate lyase degradation. Fourier transform infrared (FTIR), mass spectrometry (MS), and nuclear magnetic resonance (NMR) analyses showed that UAOS primarily consists of oligosaccharides, mainly pentamers, with a G/M ratio of 1.44 and unsaturated double bonds at the non-reducing end. UAOS exhibited good prebiotic effects; increased beneficial intestinal bacteria; improved the diversity, structure, and composition of the gut microbiota; and promoted the production of SCFAs. In particular, UAOS significantly increased the abundance of butyrate levels and their producing microbiota, such as <em>Lachnospiraceae, Alloprevotella</em>, and <em>Butyicicoccus</em>. Moreover, orally administered UAOS alleviated intestinal mucosal immunosuppression by upregulating the levels of the tight junction proteins occludin and ZO-1, enhancing the intestinal biochemical and immune barrier function by increasing levels of mucin-2 and SIgA, upregulating the CD4+/CD8+ ratio, regulating CD4+ <em>T</em> cell differentiation, and stimulated immune cytokine secretion and transcription factor production (T-bet/GATA-3). This process was related to TLR4/MyD88/NF-κB pathway. In summary, UAOS effectively regulates intestinal mucosal immune homeostasis by strengthening the intestinal barrier and regulating the intestinal microbiota and intestinal butyrate levels. Therefore, UAOS acts as a prebiotic and immune stimulator to improve host health.</div></div>","PeriodicalId":100213,"journal":{"name":"Carbohydrate Polymer Technologies and Applications","volume":"8 ","pages":"Article 100604"},"PeriodicalIF":6.2,"publicationDate":"2024-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142653965","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Production of cellulose nanocrystals from the waste banana (M. oranta) tree rachis fiber as a reinforcement to fabricate useful bionanocomposite 利用废弃香蕉树轴纤维生产纤维素纳米晶体，作为制造有用的仿生复合材料的增强材料

IF 6.2

Carbohydrate Polymer Technologies and Applications Pub Date : 2024-11-06 DOI: 10.1016/j.carpta.2024.100607

Md. Mahmudur Rahman , Md. Elius Hosen Pk , Md. Waliullah , Md. Ismail Hossain , Mohd. Maniruzzaman , Bijoy Chandra Ghos

{"title":"Production of cellulose nanocrystals from the waste banana (M. oranta) tree rachis fiber as a reinforcement to fabricate useful bionanocomposite","authors":"Md. Mahmudur Rahman , Md. Elius Hosen Pk , Md. Waliullah , Md. Ismail Hossain , Mohd. Maniruzzaman , Bijoy Chandra Ghos","doi":"10.1016/j.carpta.2024.100607","DOIUrl":"10.1016/j.carpta.2024.100607","url":null,"abstract":"<div><div>It is crucial to produce CNCs from the waste biomass of secondary plants to reduce the extra pressure on primary plants which have other advantageous applications in many sectors. Whereas the useless banana (<em>M. oranta</em>) rachis after harvesting its edible part could be a very new and beneficial one. Meanwhile, several well-known methods could be conducted, namely water retting, scouring, alkali treatment, chlorite bleaching, and acid hydrolysis, to yield high-quality CNCs. The samples of all stages were characterized by several state-of-the-art techniques, namely FTIR-ATR, TGA, FESEM, XRD, UV–vis-NIR, DLS, and zeta potential analysis, for a better understanding of their structural properties/purity. However, obtained results recommended that the CNCs have shown extensive active edges, greater thermal improvement up to 700 °C, high crystallinity around 81.07±0.15% with JCPDS-ICDD card number (00-056-1718), a honeycomb-like porous microstructure, and promising spherical shapes along with an average size around 50 nm. Additionally, the newly produced CNCs were free from all impurities and coloring materials and revealed a higher negatively charged surface around -45 mV. Therefore, due to these outstanding features, banana rachis CNCs with a high yield (around 82.05±0.06%) would be beneficially used as promising reinforcement to fabricate useful bionanocomposite for various applications to replace fossil-based hazardous synthetic materials.</div></div>","PeriodicalId":100213,"journal":{"name":"Carbohydrate Polymer Technologies and Applications","volume":"8 ","pages":"Article 100607"},"PeriodicalIF":6.2,"publicationDate":"2024-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142653956","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Novel waste wool fabric reinforced alginate-gum hydrogel composites for rapid and selective Pb (II) adsorption 用于快速、选择性吸附铅 (II) 的新型废羊毛织物增强海藻酸胶水凝胶复合材料

IF 6.2

Carbohydrate Polymer Technologies and Applications Pub Date : 2024-11-04 DOI: 10.1016/j.carpta.2024.100601

Farooq Azam , Sultan Ali , Faheem Ahmad , Sheraz Ahmad , Abher Rasheed , Yasir Nawab , Muhammad Sohail Zafar , Muhammad Amber Fareed , Moyad Shahwan

{"title":"Novel waste wool fabric reinforced alginate-gum hydrogel composites for rapid and selective Pb (II) adsorption","authors":"Farooq Azam , Sultan Ali , Faheem Ahmad , Sheraz Ahmad , Abher Rasheed , Yasir Nawab , Muhammad Sohail Zafar , Muhammad Amber Fareed , Moyad Shahwan","doi":"10.1016/j.carpta.2024.100601","DOIUrl":"10.1016/j.carpta.2024.100601","url":null,"abstract":"<div><div>Heavy metals employed in various industrial applications can negatively impact both the ecosystem and human beings. Common techniques for eliminating pollutants often rely on expensive materials. So, this study focuses on exploring economical alternatives obtained from nature and textile waste. In this study, a hydrogel composite was synthesized using wool nonwoven fabric mixed with alginate, gum Arabic (GA), and xanthan gum (XG) to evaluate its efficacy in adsorbing lead (Pb) from aqueous solutions. The composites were characterized using SEM, FTIR, and XPS to understand their structure and composition before and after Pb adsorption. The effects of time, pH, and initial metal ion concentration on Pb adsorption by the composite were also investigated. Maximum adsorption was observed at a basic pH, with the highest value recorded at 85.2 mg/g. Notably, 88.2 % of this maximum adsorption was achieved within 60 min, indicating a rapid adsorption process. Kinetic studies indicated that the adsorption process best fits pseudo-second-order kinetics, while the Freundlich model, with an R² value of 0.95, suggests a chemisorption mechanism. The developed wool-alginate-gum hydrogel composite has shown to be a promising candidate for the removal of Pb²⁺ ions from wastewater.</div></div>","PeriodicalId":100213,"journal":{"name":"Carbohydrate Polymer Technologies and Applications","volume":"8 ","pages":"Article 100601"},"PeriodicalIF":6.2,"publicationDate":"2024-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142586504","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Preparation and characterization of crystalline nanocellulose from keya (Pandanus tectorius) L. fiber as potential reinforcement in sustainable bionanocomposite: A waste to wealth scheme 作为可持续仿生复合材料潜在增强材料的匙吻鲟（Pandanus tectorius）纤维结晶纳米纤维素的制备与表征：变废为宝计划

IF 6.2

Carbohydrate Polymer Technologies and Applications Pub Date : 2024-11-03 DOI: 10.1016/j.carpta.2024.100600

Md. Ismail Hossain , Md. Mahmudur Rahman , Bijoy Chandra Ghos , Md. Abdul Gafur , Md. Ashraful Alam , M. Ahasanur Rabbi

{"title":"Preparation and characterization of crystalline nanocellulose from keya (Pandanus tectorius) L. fiber as potential reinforcement in sustainable bionanocomposite: A waste to wealth scheme","authors":"Md. Ismail Hossain , Md. Mahmudur Rahman , Bijoy Chandra Ghos , Md. Abdul Gafur , Md. Ashraful Alam , M. Ahasanur Rabbi","doi":"10.1016/j.carpta.2024.100600","DOIUrl":"10.1016/j.carpta.2024.100600","url":null,"abstract":"<div><div>Nowadays naturally available bio-renewable plant fiber-derived crystalline nanocellulose(CNC) is very attractive to researchers due to its outstanding physicochemical, thermomechanical, morphological properties and eco-friendly nature. Here, CNC was produced from a very much new, innovative, and beneficial source namely Keya leaf fiber (agro-waste biomass). Keya leaves were chosen due to their extensive abundance in Bangladesh which is useless and even not considered as cattle food. The extracted CNC was characterized by FTIR-ATR,TGA/DTG/DTA, FESEM,EDX,XRD,DLS,UV-vis-NIR, and zeta potential analysis. Morphological changes of the subjected samples have been investigated by FESEM and the surface elemental change by EDX analysis. The elimination of impurities and other components from the fiber in each step has been evaluated by monitoring the introduction of new peaks and perishing existing peaks in FTIR patterns. Significant changes have been noticed in the intensities and peak pattern of the XRD analysis and the crystallinity index was promoted gradually from RF(45.35 %) to CNC(61.31 %). The thermal analysis showed that the maximum rate of decomposition(μg/min) decreases with the chemical modification in order of RF(1440) > ATF(3510) > BF(3280) > CNC(600). Due to these outstanding findings, the newly produced CNC can be beneficially used as a reinforcement to produce multifunctional bionanocomposites that should have a good agreement with sustainable environmental protection.</div></div>","PeriodicalId":100213,"journal":{"name":"Carbohydrate Polymer Technologies and Applications","volume":"8 ","pages":"Article 100600"},"PeriodicalIF":6.2,"publicationDate":"2024-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142654053","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Fructo-oligosaccharides and polyfructans derived from Ophiopogon japonicus ameliorate experimental colitis by regulating the gut microbiota 日本麦角提取的果寡糖和多聚果糖通过调节肠道微生物群改善实验性结肠炎

IF 6.2

Carbohydrate Polymer Technologies and Applications Pub Date : 2024-11-03 DOI: 10.1016/j.carpta.2024.100602

Wen Liu , Qin Yuan , Hongyi Li , Haotong He , Tao Ren , Dingtao Wu , Shengpeng Wang , Xiaojia Chen

{"title":"Fructo-oligosaccharides and polyfructans derived from Ophiopogon japonicus ameliorate experimental colitis by regulating the gut microbiota","authors":"Wen Liu , Qin Yuan , Hongyi Li , Haotong He , Tao Ren , Dingtao Wu , Shengpeng Wang , Xiaojia Chen","doi":"10.1016/j.carpta.2024.100602","DOIUrl":"10.1016/j.carpta.2024.100602","url":null,"abstract":"<div><div><em>Ophiopogon japonicus</em> (<em>O. japonicus</em>) is a traditional medicinal herb and also used as a functional food, where carbohydrates are the key component. We aimed to investigate the structure and activity of <em>O. japonicus</em> polysaccharides (OJP) and oligosaccharides (OJO). OJP was mainly composed of fructose with a molecular weight of 4707 Da, while OJO was mainly composed of fructose and glucose with a molecular weight of 1765 Da. Both OJO and OJP exhibited protective effects against barrier function injury in <em>Caenorhabditis elegans</em>. In colitis mice, OJP and OJO exhibited noticeable relief effects, while OJO significantly promoted the production of short-chain fatty acids compared to OJP. Moreover, OJO had a more pronounced effect in promoting the level of <em>norank_f__Muribaculaceae</em> and <em>norank_f__norank_o__Clostridia_UCG-014</em>. Overall, our findings indicate that molecular weight plays an important role in the anti-inflammatory activities of OJO and OJP and suggest their potential development as therapeutics or functional foods.</div></div>","PeriodicalId":100213,"journal":{"name":"Carbohydrate Polymer Technologies and Applications","volume":"8 ","pages":"Article 100602"},"PeriodicalIF":6.2,"publicationDate":"2024-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142654054","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Reinforcing chitosan film with a natural nanofiller “Zein-methyl cellulose loaded curcumin” for improving its physicochemical properties and wound healing activity 用天然纳米填料 "添加姜黄素的玉米素-甲基纤维素 "增强壳聚糖薄膜，以改善其理化特性和伤口愈合活性

IF 6.2

Carbohydrate Polymer Technologies and Applications Pub Date : 2024-11-02 DOI: 10.1016/j.carpta.2024.100593

Sana Farouk Abaza , Nihal Saad Elbialy , Reem Darwesh , Noha Mohamed

{"title":"Reinforcing chitosan film with a natural nanofiller “Zein-methyl cellulose loaded curcumin” for improving its physicochemical properties and wound healing activity","authors":"Sana Farouk Abaza , Nihal Saad Elbialy , Reem Darwesh , Noha Mohamed","doi":"10.1016/j.carpta.2024.100593","DOIUrl":"10.1016/j.carpta.2024.100593","url":null,"abstract":"<div><div>Selecting the appropriate biomaterials for fabricating a wound dressing is an essential issue for accelerating the process of wound healing. The biopolymer “chitosan” attracted attention owing to its non-toxicity, biocompatibility, and biodegradability. However, chitosan showed poor mechanical, antioxidant and antibacterial properties. These limitations can be encountered by its conjugation with a nanofiller reinforcing and improving the film properties. The proposed nanofiller, derived from zein-methylcellulose loaded curcumin (ZeinMCNPs) was incorporated with different concentrations into a chitosan matrix (Ch) forming Ch/ZeinMCNPs1–3 films. Ch/ZeinMCNPs3 film showed a significant improvement in tensile strength, elongation at break% and Young's modulus over Ch film. Notably, the antibacterial and antioxidant activities of the Ch/ZeinMCNP1–3 films signified enhancement over chitosan. In wound rat model, wound healing contraction reached 96 % and 98 % for Ch/ZeinMCNPs2,3 opposite to 79 % for Ch film. In Ch/ZeinMCNPs2,3 treated wounds, H&E tissues sections revealed a reduction in inflammation, an enhancement in re-epithelization and neovascularization. Furthermore, Ch/ZeinMCNPs2,3 films boosted more collagen deposition as shown in MTC sections. Ch/ZeinMCNPs2,3 significantly increased SOD level (at day 7 and14) with a decrease in MDA level. Overall, the present study declares Ch/ZeinMCNPs nanocomposite film as a multifunctional wound dressing category covering the necessitates required for accelerating wound healing process safely.</div></div>","PeriodicalId":100213,"journal":{"name":"Carbohydrate Polymer Technologies and Applications","volume":"8 ","pages":"Article 100593"},"PeriodicalIF":6.2,"publicationDate":"2024-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142654051","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Plant-based chitosan for the development of biodegradable packaging materials 用于开发可生物降解包装材料的植物基壳聚糖

IF 6.2

Carbohydrate Polymer Technologies and Applications Pub Date : 2024-11-01 DOI: 10.1016/j.carpta.2024.100598

Adity Bahndral , Rafeeya Shams , Pintu Choudhary

{"title":"Plant-based chitosan for the development of biodegradable packaging materials","authors":"Adity Bahndral , Rafeeya Shams , Pintu Choudhary","doi":"10.1016/j.carpta.2024.100598","DOIUrl":"10.1016/j.carpta.2024.100598","url":null,"abstract":"<div><div>Plant-derived materials and edible films have developed as viable substitutes for standard packaging materials, enabling sustainable and ecologically acceptable alternatives. Chitosan, a cationic carbohydrate polymer derived from animal or marine sources, as well as from agricultural waste such as mushrooms or various fungi possesses excellent properties such as film formation, mechanical strength, non-toxicity, biodegradability, edibility, UV-blocking ability, antioxidant activity, and antibacterial functionality, justifying its potential as packaging/coating material for fresh agricultural products. Chitosan is obtained through the deacetylation of chitin. The quantity of waste generated in a mushroom farm varies from 5–20 % of the total yielding quantity. Filamentous fungi's cellular structure, which is rich in chitin, provides a convenient method for chitin extraction. Fungal-derived chitosan offers the advantage of controllable physicochemical characteristics, including degree of deacetylation and molecular weight, compared to chitosan obtained from crustaceans. This versatility makes fungal chitosan suitable for various utilizations in food, pharmaceutical, and biomedical management. It can be utilised for different purposes in these fields. This review primarily emphasizes the extraction of chitin from mushrooms and various fungal sources, comparing different extraction methods and chitosan-based materials fabrication techniques. Additionally, it discusses the crucial characteristics of chitosan that make it convenient for high value-added functions in the food industry. To sum up, plant-based chitosan films have the potential to completely transform the packaging sector by providing environmentally friendly substitutes for traditional materials. Accepting these advances will help build a more resilient and sustainable earth, encourage the circular economy, and reduce the amount of plastic trash produced.</div></div>","PeriodicalId":100213,"journal":{"name":"Carbohydrate Polymer Technologies and Applications","volume":"8 ","pages":"Article 100598"},"PeriodicalIF":6.2,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142654055","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Co-encapsulation of probiotic bacteria and fructooligosaccharides in basil seed gum-stabilized double emulsion gels: Probiotic viability and physicochemical properties 罗勒籽胶稳定双乳胶中益生菌和果寡糖的共包囊：益生菌活力和理化特性

IF 6.2

Carbohydrate Polymer Technologies and Applications Pub Date : 2024-11-01 DOI: 10.1016/j.carpta.2024.100599

Abolfazl Taghrir, Mohammad Hadi Eskandari, Hadi Hashemi, Seyed Mohammad Hashem Hosseini

{"title":"Co-encapsulation of probiotic bacteria and fructooligosaccharides in basil seed gum-stabilized double emulsion gels: Probiotic viability and physicochemical properties","authors":"Abolfazl Taghrir, Mohammad Hadi Eskandari, Hadi Hashemi, Seyed Mohammad Hashem Hosseini","doi":"10.1016/j.carpta.2024.100599","DOIUrl":"10.1016/j.carpta.2024.100599","url":null,"abstract":"<div><div>Double emulsions (DEs) present many potential applications for encapsulating and protecting probiotics. However, their high instability limit their real applications. To improve the prolonged stability of DEs, <em>Lacticaseibacillus rhamnosus</em> and <em>Lactobacillus gasseri</em> were separately co-encapsulated together in the presence of fructooligosaccharides (FOSs) and basil seed gum (BSG) within the internal (W<sub>1</sub>) and external (W<sub>2</sub>) aqueous phases of double emulsion gels (DEGs; W<sub>1-sol</sub>/O/W<sub>2-gel</sub>). Physical properties of DEGs, and viability of probiotics during heat processing, gastrointestinal digestion and storage were evaluated. Appropriate physical stability was observed during storage for 28 d at 4 ± 2 °C. The FOSs and microorganism type showed not effect on the droplet size (10.63 to 10.47 µm). Turbidimetry, physical stability, and morphological studies revealed the formation of aggregated droplets after 3 weeks. All DEGs presented high (>90 %) encapsulation efficiency. The viability of microencapsulated probiotics over time (14.89–14.08 %) and against simulated gastrointestinal conditions was higher than that of free cells. The encapsulation of bacteria in W<sub>1</sub> in the presence of FOSs led to a significant improvement of viability against heat (only 1.35 % to 6.83 % reduction at 72 °C). <em>L. gasseri</em> showed a higher stability against environmental conditions. Finally, BSG-stabilized DEGs can be considered for increasing the viability of probiotic in functional foods.</div></div>","PeriodicalId":100213,"journal":{"name":"Carbohydrate Polymer Technologies and Applications","volume":"8 ","pages":"Article 100599"},"PeriodicalIF":6.2,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142654052","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Chemical modifications of kombucha SCOBY bacterial cellulose films by citrate and carbamate cross-linking 通过柠檬酸盐和氨基甲酸酯交联对昆布茶 SCOBY 细菌纤维素薄膜进行化学改性

IF 6.2

Carbohydrate Polymer Technologies and Applications Pub Date : 2024-11-01 DOI: 10.1016/j.carpta.2024.100595

Ananda S. Amarasekara , Ambar B. Shrestha , Deping Wang

{"title":"Chemical modifications of kombucha SCOBY bacterial cellulose films by citrate and carbamate cross-linking","authors":"Ananda S. Amarasekara , Ambar B. Shrestha , Deping Wang","doi":"10.1016/j.carpta.2024.100595","DOIUrl":"10.1016/j.carpta.2024.100595","url":null,"abstract":"<div><div>Bacterial cellulose films prepared by purification of kombucha SCOBY pellicle was chemically modified in an attempt to improve the properties of the films. Two different approaches were tested including cross-linking with citric acid and carbamate groups. Citric acid cross-linking resulted a decrease in tensile strength. Whereas carbamate cross-linking with hexamethylene, toluene, methylene di-<em>p</em>-phenyl and 4,4′-methylene-<em>bis</em>(cyclohexyl) linking groups by treatments with corresponding diisocyanates resulted improvements in tensile strength, thermal stability and reduction in water retention properties in kombucha bacterial cellulose films. The highest improvement in tensile strength was observed in toluene group cross-linked films showing a tensile strength of 51.3 ± 5.4 MPa, in comparison to untreated films of 25.3 ± 1.8 MPa. Carbamate cross-linking increased the bacterial cellulose decomposition onset temperatures by 38–100 °C in comparison to untreated bacterial cellulose films and the highest increase of 100 °C was observed with cross-coupling through methylene di-<em>p</em>-phenyl groups</div></div>","PeriodicalId":100213,"journal":{"name":"Carbohydrate Polymer Technologies and Applications","volume":"8 ","pages":"Article 100595"},"PeriodicalIF":6.2,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142572237","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Adsorption of sulphonated lignin-carbohydrate complexes (LCCs) onto cellulose surfaces 纤维素表面对磺化木质素-碳水化合物复合物（LCC）的吸附作用

IF 6.2

Carbohydrate Polymer Technologies and Applications Pub Date : 2024-10-30 DOI: 10.1016/j.carpta.2024.100591

Brita Asikanius , Tiina Liitiä , Davide Rigo , Nicola Giummarella , Rikard Slättegård , Monika Österberg

{"title":"Adsorption of sulphonated lignin-carbohydrate complexes (LCCs) onto cellulose surfaces","authors":"Brita Asikanius , Tiina Liitiä , Davide Rigo , Nicola Giummarella , Rikard Slättegård , Monika Österberg","doi":"10.1016/j.carpta.2024.100591","DOIUrl":"10.1016/j.carpta.2024.100591","url":null,"abstract":"<div><div>Biorefinery side streams have the potential to be utilized for the production of biobased polymers, which can serve as viable substitutes for synthetic and food-based alternatives not only enhancing the sustainability of biorefineries but also contributing to their profitability. One interesting material with potential as barrier coatings for paper and board is the lignin-carbohydrate complex (LCC). However, the chemical structure and molecular weight of the LCCs varies a lot depending on the process conditions and modifications. To be able to optimize their performance it is imperative to obtain a comprehensive understanding of their interactions with cellulosic surfaces and more specifically to correlate these interactions with the chemical structure. For this purpose, we combined adsorption studies using surface-sensitive Quartz Crystal Microbalance with Dissipation (QCM-D) and bulk spray coating of cardboard with detailed structural analysis using 2D HSQC NMR spectroscopy. To elucidate the effect of carbohydrate content and molecular weight, varying LCC samples were compared to lignosulphonate. The QCM-D results revealed that LCCs with higher carbohydrate content adsorbed better on cellulose surface. Increasing the pH from 7 to 10 increased the repulsion leading to lower adsorption. The spray coating results further supported the importance of polymer size and carbohydrate fraction.</div></div>","PeriodicalId":100213,"journal":{"name":"Carbohydrate Polymer Technologies and Applications","volume":"8 ","pages":"Article 100591"},"PeriodicalIF":6.2,"publicationDate":"2024-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142653954","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0