Cellulose最新文献_第2页

Use of pomegranate peel extract for preparation of UV-absorbing and antimicrobial nitrocellulose coating for wood finishing

IF 4.9 2区工程技术

Cellulose Pub Date : 2024-11-07 DOI: 10.1007/s10570-024-06246-4

Mohammad Hassan, Ahmed Awaad, Wafaa Abou-Elseoud, Enas Hassan

{"title":"Use of pomegranate peel extract for preparation of UV-absorbing and antimicrobial nitrocellulose coating for wood finishing","authors":"Mohammad Hassan, Ahmed Awaad, Wafaa Abou-Elseoud, Enas Hassan","doi":"10.1007/s10570-024-06246-4","DOIUrl":"10.1007/s10570-024-06246-4","url":null,"abstract":"<div><p>Antimicrobial and UV-resistant coatings are important finishing materials for making specialty wood products. In the current work, anti-bacterial and UV-resistant coatings were prepared from nitrocellulose (NC) and pomegranate peel extract (PGE). Different ratios of PGE were added to NC solution (up to 10 wt.% of NC) and the effect of PGE on the viscosity of NC solution, optical, UV-absorption, mechanical, moisture sorption, and antibacterial properties of NC films was studied. Finally, the NC/PGE solution with the appropriate antibacterial activity was sprayed onto the surface of beechwood and its surface was evaluated and compared to neat NC coating regarding gloss, color, change in color due to daylight and thermal aging, and wettability by water. The results showed that PGE reduced the viscosity of NC solution even at low concentrations. All the NC/PGE films had good homogeneity, transparency, UV light absorption, film flexibility, and good antibacterial properties against Gram-positive <i>Staphylococcus aureus</i> and Gram-negative <i>Escherichia coli</i> bacteria at PGE content 6% or higher. PGE moderately increased the moisture sorption of NC films at high relative humidity (98%). Beechwood was sprayed with NC/8% PGE solution in ethyl acetate; the presence of PGE in NC didn’t affect the visual appearance or light indices (L, a, and b) of the coated wood when compared to the coating with neat NC. The NC/8%PGE coating had high stability against daylight aging while there was no difference in color change between the wood coated with NC and NC/8%PGE after thermal aging. The study showed the potential of PGE as a renewable and safe anti-bacterial and UV-resistant additive for nitrocellulose lacquers used in furniture.</p><h3>Graphical abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":511,"journal":{"name":"Cellulose","volume":"31 18","pages":"11147 - 11167"},"PeriodicalIF":4.9,"publicationDate":"2024-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10570-024-06246-4.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142754312","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Interaction of cellulose and water upon drying and swelling by 13C CP/MAS NMR

IF 4.9 2区工程技术

Cellulose Pub Date : 2024-11-07 DOI: 10.1007/s10570-024-06227-7

Matti Leskinen, Ilkka Kilpeläinen, Sami Hietala

{"title":"Interaction of cellulose and water upon drying and swelling by 13C CP/MAS NMR","authors":"Matti Leskinen, Ilkka Kilpeläinen, Sami Hietala","doi":"10.1007/s10570-024-06227-7","DOIUrl":"10.1007/s10570-024-06227-7","url":null,"abstract":"<div><p>Associated water plays a significant role in the morphology of cellulose and the molecular interactions between polymer chains. It also affects the material properties and influences the interpretation of analysis results. In the present study the interaction of cellulose and water in well-defined cellulose samples, hydrogel beads prepared by regeneration of microcrystalline cellulose from organic electrolyte solution, are investigated by solid state <sup>13</sup>C CP/MAS NMR. Drying of the hydrogel beads under ambient conditions gave condensed cellulose xerogel beads, which could be partly reswollen in water. The analysis of beads of different moisture content and under repeated drying and swelling afforded a better understanding of the hierarchical organization and crystallinity of cellulose II, which is broadly divisible into crystalline and surface residues in CP/MAS, and the nature of cellulose hornification. The changes in the <sup>13</sup>C CP/MAS spectra of water- and D<sub>2</sub>O-swollen beads also provide new information on the role of immobilized bound water in intermolecular polarization transfer from water to cellulose during the cross-polarization pulse sequence, and evidence of the cellulose II reducing-end-group, which is more prominently observable in CP/MAS under dry conditions.</p><h3>Graphical abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":511,"journal":{"name":"Cellulose","volume":"31 18","pages":"10745 - 10769"},"PeriodicalIF":4.9,"publicationDate":"2024-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10570-024-06227-7.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142754314","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Evaluation of the production of lignin-containing cellulose nanofibrils with high whiteness for blocking UV light

IF 4.9 2区工程技术

Cellulose Pub Date : 2024-11-07 DOI: 10.1007/s10570-024-06261-5

Wenjuan Deng, Xianghua Hu, Keyan Wang, Fan Wang, Yingying Zhai, Tong Liu, Zhaoyang Yuan, Yangbing Wen

{"title":"Evaluation of the production of lignin-containing cellulose nanofibrils with high whiteness for blocking UV light","authors":"Wenjuan Deng, Xianghua Hu, Keyan Wang, Fan Wang, Yingying Zhai, Tong Liu, Zhaoyang Yuan, Yangbing Wen","doi":"10.1007/s10570-024-06261-5","DOIUrl":"10.1007/s10570-024-06261-5","url":null,"abstract":"<div><p>Lignin is a natural polymer that could absorb ultraviolet (UV) light, making it a potential material for anti-UV applications. The dark color and the low emulsion stability, however, greatly hinder the extended application of lignin in various areas such as sunscreens. To address this concern, the colorless lignin-containing cellulose nanofibrils (LCNFs) with different lignin content was prepared through a sequential process of 2,2,6,6-tetramethylpiperidine-1-oxyl (TEMPO)-mediated oxidation, hydrogen peroxide (H<sub>2</sub>O<sub>2</sub>) decolorization, and high-pressure homogenization. The obtained LCNFs were characterized in terms of chemical composition, whiteness, morphology, and lignin content. The results indicated that the preparation process not only largely preserved lignin, but also maintained the structure of cellulose. Moreover, the UV blocking property of the prepared white LCNFs was determined by blending into a cream. The rates of UV blocking and 2,2-diphenyl-1-picrylhydrazyl (DPPH) scavenging were measured to be 94.7% and 23.1%, respectively, which were comparable to that of the commercial sunscreen products. The results demonstrated that LCNFs with high whiteness could be efficiently prepared and have great potential to be applied in the anti-UV industry.</p></div>","PeriodicalId":511,"journal":{"name":"Cellulose","volume":"31 18","pages":"10969 - 10984"},"PeriodicalIF":4.9,"publicationDate":"2024-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142754315","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Correction: A molecular dynamics study of the effects of silane and cellulose nanocrystals at a glass fiber and epoxy interphase

IF 4.9 2区工程技术

Cellulose Pub Date : 2024-11-06 DOI: 10.1007/s10570-024-06230-y

Ejaz Haque, Kyriaki Kalaitzidou, Xiawa Wu

引用次数: 0

Bioinspired phosphorus functionalized polycarbazole as highly potent flame retardants and hydrophobic material for smart textile applications

IF 4.9 2区工程技术

Cellulose Pub Date : 2024-11-06 DOI: 10.1007/s10570-024-06263-3

Madhuri Bhakare, Kshama Lokhande, Mahesh Bondarde, Pratik Dhumal, Pranay Tambe, Surajit Some

{"title":"Bioinspired phosphorus functionalized polycarbazole as highly potent flame retardants and hydrophobic material for smart textile applications","authors":"Madhuri Bhakare, Kshama Lokhande, Mahesh Bondarde, Pratik Dhumal, Pranay Tambe, Surajit Some","doi":"10.1007/s10570-024-06263-3","DOIUrl":"10.1007/s10570-024-06263-3","url":null,"abstract":"<div><p>Creating long-lasting, environmentally friendly, and fire-resistant materials using biomass derivatives remains a significant challenge in fire safety and prevention. This study addresses this challenge by developing novel, naturally derived coatings that enhance the fire resistance of textiles. Specifically, carbazole was polymerized in situ using benzoyl peroxide, with phosphoric acid facilitating both polymerization and functionalization to produce phosphorous-functionalized polycarbazole (P@PCz). This material improves the hydrophobicity and flame retardancy of cotton fabric. The study also involved the extraction of carbazole from Murraya koenigii bioresources, producing bioinspired phosphorus-functionalized polycarbazole (BP@PCz), achieving similar results. The synthesized nanocomposite-coated cotton fabric demonstrated exceptional flame-retardant and hydrophobic properties. Notably, P@PCz-coated cotton fabrics withstood continuous flame exposure for up to 585 s, compared to 62 s for PCz-coated fabrics and just 14 s for blank fabrics. Flame retardancy was further evaluated using the limiting oxygen index (LOI) and vertical flammability tests, with P@PCz-coated fabrics achieving an LOI value of 40.4%, significantly higher than the 23.2% for PCz-coated fabrics. Additionally, the water contact angle of P@PCz-coated cotton fabric was measured at 121.39°, indicating excellent hydrophobic properties. This study presents a novel approach for the rapid, large-scale synthesis of P@PCz, demonstrating its potential for various sustainable chemical applications, including enhanced hydrophobicity, and flame retardancy. The use of bioinspired materials in this work paves the way for the development of eco-friendly flame-retardant polymeric materials.</p><h3>Graphical abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":511,"journal":{"name":"Cellulose","volume":"31 18","pages":"11199 - 11210"},"PeriodicalIF":4.9,"publicationDate":"2024-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142754310","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Optimizing addition of NaClO in TEMPO-mediated oxidation of cellulose for less nanofiber degradation

IF 4.9 2区工程技术

Cellulose Pub Date : 2024-11-06 DOI: 10.1007/s10570-024-06262-4

Chong Tang, Huangjingyi Chen, Zicong Shi, Xiaorui Liu, Liang Liu, Juan Yu, Yimin Fan

{"title":"Optimizing addition of NaClO in TEMPO-mediated oxidation of cellulose for less nanofiber degradation","authors":"Chong Tang, Huangjingyi Chen, Zicong Shi, Xiaorui Liu, Liang Liu, Juan Yu, Yimin Fan","doi":"10.1007/s10570-024-06262-4","DOIUrl":"10.1007/s10570-024-06262-4","url":null,"abstract":"<div><p>The TEMPO-mediated oxidation is one of the most popular methods to prepare cellulose nanofibers due to its easy operation, high oxidation efficiency and resulting high aspect ratio nanofibers with uniform size. Among TEMPO-mediated oxidation methods, the TEMPO/NaBr/NaClO (TBN) oxidation system is the most commonly used and has the highest oxidation efficiency. However, cellulose suffers from the degradation by NaClO in TBN oxidation, which can be directly reflected in the reduction of degree of polymerization of cellulose. In this paper, we explored the effect of the content of NaClO on oxidation and figured out an optimization method where NaClO was added periodically for TBN oxidation system (semi-batch process) that could efficiently oxidize hardwood bleached kraft pulp (HBKP) cellulose while reducing the degradation. This phenomenon is most obvious when the addition amount of NaClO is 10 mmol/g and the reaction time is 7.5 h, the carboxyl content of the TEMPO oxidized cellulose obtained by adding NaClO in different methods has no significant change (both are around 1.5 mmol/g), but the degree of polymerization of TEMPO oxidized cellulose obtained by adding NaClO periodically is 2.3 times that of TEMPO oxidized cellulose obtained by adding NaClO in one batch. This optimization method provides a feasible way for the adjustable preparation of nanofibers with high carboxyl content by maintaining relative high degree of polymerization.</p></div>","PeriodicalId":511,"journal":{"name":"Cellulose","volume":"31 18","pages":"10785 - 10800"},"PeriodicalIF":4.9,"publicationDate":"2024-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142754309","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Recent advances in cellulose nanospheres: production, formation mechanisms, properties and applications

IF 4.9 2区工程技术

Cellulose Pub Date : 2024-11-04 DOI: 10.1007/s10570-024-06229-5

Sergio Luis Yupanqui-Mendoza, Valdeir Arantes

{"title":"Recent advances in cellulose nanospheres: production, formation mechanisms, properties and applications","authors":"Sergio Luis Yupanqui-Mendoza, Valdeir Arantes","doi":"10.1007/s10570-024-06229-5","DOIUrl":"10.1007/s10570-024-06229-5","url":null,"abstract":"<div><p>The morphology of cellulose nanomaterials plays a crucial role in determining their properties and expanding their application possibilities. Among these bionanomaterials, cellulose nanospheres (CNSs) have emerged as a novel form, distinguished by unique spherical morphology and properties that depend on their size, crystallinity, and surface chemistry. These properties make CNSs suitable for various applications, ranging from additives in nanocomposites to biomedical uses. Despite its promising potential, CNSs are underreported in the literature, highlighting the need for a comprehensive evaluation of production, mechanism, and performance perspectives. This review provides an in-depth examination of the primary methods used for CNS production, including acidic, enzymatic, mechanical, and oxidative processes. We analyze the complex relationship between these production methods, the resulting spherical characteristics, and the yields obtained during isolation. Additionally, we examine the various proposed mechanisms for CNS formation and advance these mechanisms, which are essential for optimizing and tailoring production processes to achieve specific structure outcomes. Finally, we discuss recent advancements in CNS applications across different sectors and address future research directions and challenges for this innovative bionanomaterial.</p></div>","PeriodicalId":511,"journal":{"name":"Cellulose","volume":"31 18","pages":"10609 - 10649"},"PeriodicalIF":4.9,"publicationDate":"2024-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142754307","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Improving tribological efficiency of isopropyl palmitate oil with cellulose nanocrystals: a sustainable approach for high-performance lubricants

IF 4.9 2区工程技术

Cellulose Pub Date : 2024-11-02 DOI: 10.1007/s10570-024-06181-4

María J. G. Guimarey, Marco A. Marcos, Javier P. Vallejo, José L. Viesca, María J. P. Comuñas, Luis Lugo, Antolin Hernández Battez

{"title":"Improving tribological efficiency of isopropyl palmitate oil with cellulose nanocrystals: a sustainable approach for high-performance lubricants","authors":"María J. G. Guimarey, Marco A. Marcos, Javier P. Vallejo, José L. Viesca, María J. P. Comuñas, Luis Lugo, Antolin Hernández Battez","doi":"10.1007/s10570-024-06181-4","DOIUrl":"10.1007/s10570-024-06181-4","url":null,"abstract":"<div><p>This article explores the potential of cellulose nanocrystals (CNCs) as a lubricant additive for isopropyl palmitate (IPP) oil to enhance its tribological performance. CNCs, derived from renewable sources, offer a sustainable and environmentally friendly alternative to traditional lubricant additives. A two-step method was used to prepare the nanolubricants, with visual control and dynamic light scattering measurements to assess their temporal stability. The viscous behavior of the nanolubricants, in terms of viscosity and viscosity index, was evaluated at different temperatures. The study assesses the effectiveness of CNC/IPP oil blends as lubricants through tribological tests, including evaluations under pure sliding and rolling–sliding conditions. Studies on worn surfaces were conducted using surface roughness analysis, Raman mapping, and XPS, and the thermal stability was examined to determine their suitability for different operating conditions. CNCs significantly reduce friction by up to 44% and improve wear resistance compared to the neat IPP base oil, presumably due to a self-repairing effect. Furthermore, an improvement of the thermal conductivity of pure IPP base oil has been revealed with increasing CNC concentration. This study enhances the understanding of cellulose nanocrystals as lubricant additives and their potential to transform traditional lubricating oils into high-performance and sustainable solutions.</p></div>","PeriodicalId":511,"journal":{"name":"Cellulose","volume":"31 18","pages":"10879 - 10894"},"PeriodicalIF":4.9,"publicationDate":"2024-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10570-024-06181-4.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142754252","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Flexible electrically conductive films and impregnated papers with chitosan/esterified cellulose multi-network structure with humidity and pressure sensing

IF 4.9 2区工程技术

Cellulose Pub Date : 2024-11-01 DOI: 10.1007/s10570-024-06237-5

Jiahao Kang, Qiangli Zhao, Min Mao, Qiang Mu, Xiaoliang Zhao, Xinhai He, Jianwei Li

{"title":"Flexible electrically conductive films and impregnated papers with chitosan/esterified cellulose multi-network structure with humidity and pressure sensing","authors":"Jiahao Kang, Qiangli Zhao, Min Mao, Qiang Mu, Xiaoliang Zhao, Xinhai He, Jianwei Li","doi":"10.1007/s10570-024-06237-5","DOIUrl":"10.1007/s10570-024-06237-5","url":null,"abstract":"<div><p>Electroactive biomass materials based on chitosan (CS), cellulose, etc. have great potential for applications in non-contact switches, smart wearable devices, environmental monitoring, etc. However, due to low electroactivity and susceptibility to overhydration, it is necessary to add carbon materials, synthetic conductive polymers or metal oxides, etc. and introduce numerous chemical crosslinking, which makes them face the problems of poor filler-matrix dispersion, high preparation cost and environmental pollution. In this study, citrate-modified cellulose (EMC) was prepared and introduced into the CS matrix, and a multi network structure with hydrogen bonding, chemical crosslinking and ionic complexation crosslinking was constructed by adding chemical crosslinking and Cu<sup>2+</sup> ion complexation. Flexible conductive composite film (CS-EMC-Cu film) and paper (CS-EMC-Cu impregnated paper) were prepared. The results showed that the incorporation of Cu<sup>2+</sup> and EMC effectively improved the flexibility (elongation at break of 106%), water resistance and surface hydrophilicity of the films. The composite conductive film (conductivity of 0.277 S/m) has good wet-responsive deformation properties, can be used as a non-contact smart switch, and has good humidity (0.745 RH<sup>−1</sup>) and pressure sensing properties, but the durability still needs to be improved. The CS-EMC-Cu impregnated conductive paper (conductivity of 0.0737 S/m) has good flexibility (elongation at break of 7.9%) and water resistance, and is capable of lighting a light bulb. Its brightness is enhanced with humidity and has good wet response characteristics. This flexible conductive film and paper are prepared in an environmentally friendly way, which provides ideas for the preparation and design of biomass-based flexible sensors, and is also of great significance for the high value-added utilization of biomass materials.</p></div>","PeriodicalId":511,"journal":{"name":"Cellulose","volume":"31 18","pages":"11065 - 11085"},"PeriodicalIF":4.9,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142754229","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Improvement of the properties of nanocellulose suspensions and films by the presence of residual lignin

IF 4.9 2区工程技术

Cellulose Pub Date : 2024-11-01 DOI: 10.1007/s10570-024-06222-y

Ricardo O. Almeida, Ana Ramos, Erfan Kimiaei, Monika Österberg, Thaddeus C. Maloney, José A. F. Gamelas

{"title":"Improvement of the properties of nanocellulose suspensions and films by the presence of residual lignin","authors":"Ricardo O. Almeida, Ana Ramos, Erfan Kimiaei, Monika Österberg, Thaddeus C. Maloney, José A. F. Gamelas","doi":"10.1007/s10570-024-06222-y","DOIUrl":"10.1007/s10570-024-06222-y","url":null,"abstract":"<div><p>The effect of lignin on several properties of nanocellulose suspensions and films, such as degree of mechanical fibrillation, optical transparency, and gas barrier properties is still a matter of study. In the present work, it was investigated the influence of residual lignin on the efficiency of cationization and enzymatic pretreatments to produce lignin-containing nanocelluloses (LCNFs) from unbleached kraft pulps, and, on the properties (mechanical, gas barrier, transparency, antioxidant activity and thermal stability) of the corresponding films. The overall efficiency of the pretreatments was not negatively affected by the presence of lignin (3–4 wt%) in the starting pulps, as measured by the degree of fibrillation, degree of polymerization of cellulose, optical transmittance, and cationic group content (cationization). On the contrary, lignin could even enhance the mechanical fibrillation and the optical transmittance (transparency) of the cationic and enzymatic LCNF suspensions compared to the reference lignin-free nanocelluloses (CNFs) prepared from bleached pulp. Lignin could also improve the optical transparency of the films, which is an important finding of the present work: 64.8% for LCNF-Cationic (-Cat) vs. 56.9% for CNF-Cat, and 74.5% for LCNF-Enzymatic (-Enz) vs. 64.5% for CNF-Enz. Moreover, films with lignin demonstrated higher antioxidant activity, UV-light absorption capacity, larger char residue, and even improved oxygen barrier compared to the analogous CNF films. A remarkable oxygen barrier performance was exhibited by the LCNF-Enz film (oxygen transmission rate below 2 cm<sup>3</sup>/m<sup>2</sup>.day). Overall, the presence of residual lignin in the cellulose micro/nanofibril production can improve some of the suspension and film properties, particularly the optical transparency.</p></div>","PeriodicalId":511,"journal":{"name":"Cellulose","volume":"31 18","pages":"10951 - 10967"},"PeriodicalIF":4.9,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10570-024-06222-y.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142754232","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0