POLYMER DEGRADATION AND STABILITY
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2025
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IF 7.4
Meng Huang,Zilu Wang,Yuanxin Yao,Jian Gao,Bo Qi
The service life of oil-immersed transformers is closely linked to the durability of insulation pressboard, which is often compromised by thermal aging during prolonged high-temperature operation. To enhance the thermal stability of cellulose insulation pressboard, this study proposes a modification technique based on aminosilane treatment. The modified pressboard is characterized by Fourier transform infrared (FTIR) spectroscopy, scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), and mercury intrusion porosimetry (MIP). The combined results confirm that aminosilane grafts amino groups onto the cellulose fibers and forms a cross-linked network among them. Compared to the unmodified insulation pressboard, the aminosilane-modified insulation pressboard exhibits a 7.42 % decrease in dielectric constant and a 7.42 % increase in elongation at break. The contact angle increases from 75.7° to 99.4°, indicating enhanced hydrophobicity. Aminosilane modification enhances the thermal stability of the insulation pressboard. Throughout the aging process, the modified pressboard consistently demonstrates superior performance in key metrics such as degree of polymerization (DP), dielectric properties, and mechanical strength. After 30 days of thermal exposure, the modified pressboard exhibits a 44.14 % increase in DP, a 7.76 % decrease in dielectric constant, and a 2.3 % improvement in elongation at break relative to the reference sample.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2025
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IF 8.5
Zhaoyong Gao,Benzhi Ju,Bingtao Tang,Wei Ma,Wenbin Niu,Shufen Zhang
Biomass-derived adsorption materials from agricultural wastes, particularly crop straw, have emerged as promising candidates for water treatment owing to their abundant sources, cost-effectiveness, and renewability. Nevertheless, the inherent limitations of raw straw—suboptimal adsorption capacity and organic matter leaching risks—restrict its viability in wastewater remediation. In this study, a straw cellulose-based anion exchanger (SCAE) with enhanced adsorption performance and recyclability was fabricated through alkaline pretreatment and monochlorotriazine-mediated etherification. The di-tertiary amine-based cationic modifier enhances the functional group density on the anion exchanger， while the natural crystalline structure of cellulose maintains the structural stability of the anion exchanger. The optimal adsorption performance can be achieved using only 12.5 % of the straw mass as the modifier. The optimized SCAE retained over 95.4 % mass retention through 15 acid-base washing cycles while demonstrating 265 mg g −1 static adsorption capacity for simulated dye effluents. A desorption efficiency of 97 % was achieved in the adsorption-desorption cycles using a 0.25 wt% NaOH solution. The industrial applicability of SCAE was also evidenced by a 97.7 % chroma reduction in actual printing and dyeing wastewater. Remarkably, dynamic column tests revealed that 50 g SCAE could process 18.1 L simulated effluent per cycle, maintaining 95.6 % performance retention after five cycles. This strategy bridges agricultural waste recycling with advanced water purification technologies, providing a closed-loop solution for industrial dyeing wastewater.
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高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2025
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IF 8.5
Changjian Zhou,Hailang Liu,Tong Liu,Yusheng Wu,Wanrong Chen,Zhengqing Ding,Xinyan Yan,Xujuan Huang,Zhaosheng Cai
Emulsifiers based on amphiphilic cellulose are typically created by adding a hydrophobic group to hydrophilic cellulose. There are few reports on the use of rigid large skeleton structures as hydrophobic groups in the modification of hydrophilic cellulose. This study investigated the hydrophobic rosin (DAGE, containing a large rigid hydrogenated three-phenanthrene ring) modified hydroxyethyl cellulose (HEC), and it was applied to stabilize emulsion gels as an emulsifier (DAGE-g-HEC). DAGE-g-HEC was successfully prepared and DAGE-g-HEC (I–V) were obtained with different grafting degrees ranging from 34.65 % to 46.20 %. In terms of lowering water surface tension, DAGE-g-HEC demonstrated greater activity than HEC, and the γ CMC was about 36.00 mN/m. DAGE-g-HEC stabilized emulsion gels with 80 % oil phase showed that emulsion stability remained for more than six months at 0.05 wt% or above 0.05 wt% DAGE-g-HEC concentration due to the tight interfacial films established by the rigid group of rosin. The rheological property showed that as the DAGE-g-HEC concentrations rose, so did the emulsions' apparent viscosity. All emulsion gels exhibit strong elastic behavior, according to the loss tangent (tan δ = G″/G′) evolutions.
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高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2025
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IF 8.5
Jinjiang Ma,Penghao Sun,Fuhao Dong,He Liu,Xu Xu,Xujuan Huang
Fast-growing wood is rich in hydroxyl groups, which are sensitive to water and readily absorb moisture in humid environments, leading to a reduction in the mechanical properties of the wood and limiting its applications. Herein, a silicone modified rosin-based hydrophobic agent (SRA) was synthesized from a biomass resource, tetrahydro rosin acids (TRA), and (3-glycidyloxypropyl)triethoxysilane (KH-561) through a ring-opening reaction. The triethoxy groups in the SRA structure facilitate the formation of covalent bonds with the hydroxyl groups of cellulose in the wood, effectively anchoring the active components within the wood matrix and filling its porous structure. The addition of SRA not only reduced the water absorption rate of the wood from 112 % to 34 % after a 12-day immersion in water, and increased the water contact angle of the wood from 100° to 127°, but also greatly improved the dimensional stability of the wood with a 52 % antiswelling efficiency. Furthermore, the solid crosslinked network structure enhances the mechanical properties of the wood, increasing its axial tensile strength from 43 MPa to ∼65 MPa. This study is significant for utilizing biomass resources to improve the performance of fast-growing wood and expand its application fields.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
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IF 8.5
Yaxin An,Teng Ma,Hongbo Wang,Xianpei Xu,Junming Liang,Fu Li,Youbo Di,Wei Wang,Pengfei Fei,Mei Liu
An asymmetric hydrophilic/hydrophobic cellulose acetate-based composite membrane with superior separation performance for membrane distillation was fabricated by chemically introducing hydrophobic groups into cellulose diacetate molecules through covalent bonding with the highly reactive m-tolyl isocyanate (MTIS), followed by combining with a hydrophilic cellulose triacetate nanofiber membrane and underwent reverse phase inversion. Simultaneously, the pore structure and surface roughness of the hydrophobic layer were regulated by adjusting the coagulation bath composition. The characterisation results confirmed the stable covalent bonding of MTIS. The increasing ethanol concentration in the coagulation bath significantly promoted pore formation and enhanced surface roughness of the hydrophobic layer. The synergistic effect of chemical modification and physical structuring substantially improved surface hydrophobicity, achieving a water contact angle of 116.7° and excellent separation efficiency (flux: 26.38 kg m −2 h −1 , salt rejection: 96.87 %) for the optimal membrane prepared with a water/ethanol volume ratio of 67:33. In addition, chemical modification and coagulation bath optimisation positively influenced the thermomechanical properties and crystallinity of the composite membrane. This study provides a new technical basis for the construction of hydrophobic layers in cellulose-based composite membranes for membrane distillation and methodological guidance for tuning the hydrophilic and hydrophobic characteristics of cellulose-based materials.
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高影响因子
Small
·
2025
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IF 12.1
Zhijian Huang,Yujun Wei,Jing Zhang,Penghui Chen,Hongzhen Zeng,Sihui Chen,Longshi Rao,Jianing Wu,Shudong Yu
Interfacial solar steam generation (ISSG) offers a promising and eco-friendly approach to produce clean water efficiently. As a green and sustainable material, cellulose paper has been extensively used in ISSG. However, conventional methods for transforming cellulose paper into photothermal material are still cumbersome. In this work, a cellulose paper-based solar evaporator is fabricated by laser engraving. In detail, through a pretreatment process with a composite gelatin coating followed by laser direct writing, the study achieves one-step in-situ fabrication of cobalt-doped graphene on cellulose paper. The gelatin-based coating is formulated using cobalt nitrate and gelatin as precursor materials. The synergistic effects of cellulose paper's natural porous fibrous framework and gelatin coating enable the formation of a 3D porous graphene structure with superior capillary performance after laser engraving. Under 1 sun irradiation, the as-fabricated paper-based evaporator decorated with metallic cobalt and cobalt oxides nanoparticles achieves an evaporation rate of 1.50 kg m −2 h −1 with a 92.5% evaporation efficiency and excellent seawater desalination performance. The as-developed paper-based evaporator exhibits significant potential in seawater desalination and wastewater treatment, offering a practical technological pathway to produce freshwater.
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高影响因子
NEW JOURNAL OF CHEMISTRY
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2025
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IF 2.5
Xunhai Pan,Xiaoyan Lin,Lili Liang,Hailing Xi
Strippable film decontamination is critical for removing radioactive surface contamination during nuclear facility decommissioning and accident response. However, the conventional detergents perform poorly in film formation, freeze easily, and are hard to spray at low temperatures (below 0 °C). In this study, a novel ethyl cellulose-g-polyacrylate (EC-g-PA) detergent was successfully synthesized via benzoyl peroxide (BPO) initiated free-radical polymerization of ethyl cellulose (EC), methyl methacrylate (MMA), butyl acrylate (BA), ethyl methacrylate (EMA), and 2-ethylhexyl acrylate (2-EHA). The synthesized EC-g-PA was characterized by Fourier transform infrared (FTIR) spectroscopy, scanning electron microscopy (SEM), gel permeation chromatography (GPC), and thermogravimetric analysis (TGA). The film-forming and rheological properties of EC-g-PA detergents at low temperatures were systematically investigated and the mechanical properties of the EC-g-PA film were tested. Moreover, the decontamination efficiency of the EC-g-PA detergent on various plates within the temperature range from −10 °C to 25 °C was also investigated. The results demonstrate that the EC-g-PA detergent exhibits excellent low-temperature fluidity (below 0 °C) and colloidal stability. Notably, it demonstrates rapid film formation and complete peelability within 12 h under subzero conditions. The contamination decontamination rate (CDR) exceeds 90% on ceramic tiles (CT), glass (G), stainless steel (SS), and marble (M), while achieving 78.30% on concrete (C) at 0 °C. These results demonstrate that the EC-g-PA detergent shows significant potential for application in nuclear facility decommissioning and accident response at low temperatures.
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DESALINATION
·
2025
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IF 9.8
Ying Qian,Zhexuan Lan,Shunfang Wen,Rong Liu,Haifeng Zhang,Ruiqing Li,Du Nie,Seeram Ramakrishna,Wei Zhang,Jiamu Dai
Solar interfacial evaporators (SIEs) with directional tubular structure have been well studied in seawater desalination. However, the lower water transporting ability always limits vaporing rate. Herein, inspired by the water transport mechanism of natural trees, we developed a unidirectionally orientated fiber-based columnar evaporator (CSCF) by simply treating cellulose acetate-based cigarette filter (CF) with sodium dodecyl sulfate (SDS) and carbon nanotubes (CNTs). Benefitting from the capillary and wicking effect of the original orientated fibers in CF, water could be effectively conducted to upper surface for solar evaporating process by loaded CNTs. Significantly, SDS could achieve homogeneous CNTs dispersing on CF, as well as regulate the liquid-solid and hydrophilic-hydrophobic interfacial environment to reduce water surface tension and evaporation enthalpy, which is helpful for further enhancing water transporting and rapid evaporating. Under 1 sun solar illumination, a superhigh and stable evaporation rate of 7.257 kg m −2 h −1 has been achieved. Additionally, even under dark condition, CSCF evaporator maintains high performance of 2.688 kg m −2 h −1 . It enables all-day evaporation while exhibiting excellent salt deposition resistance and long-term durability. This highly efficient and stable evaporator shows significant application prospects in seawater desalination, wastewater purification, and agricultural irrigation of cellulose derivative materials.
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Journal of Bioresources and Bioproducts
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2025
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IF 13
Ruotong Yao,Chao Wang,Yunli Xu,Min Wu
In recent years, there has been a growing interest in the development of cellulose or nanocellulose (CNF) materials in food packaging industry due to their green and processable nature, while the inherent hydrophilicity of cellulose presents significant challenges in meeting the high barrier requirements essential for food packaging applications. In this study, a dual strategy of internal cross-linking and external functional coating was employed to fabricate high-barrier nanocellulose-based packaging. Dialdehyde CNF (DCNF) was incorporated into pristine CNF to form a dense cross-linking network containing hemiacetal linkages and hydrogen bonds. Additionally, an ethyl cellulose (EC)/curcumin (Cur) coating was applied to further improve hydrophobicity while leveraging curcumin’s pH-responsive properties for visual monitoring. The influence of DCNF oxidation time and CNF incorporation ratio on film crystallinity and water resistance was systematically studied. The synergistic interaction of DCNF/CNF crosslinking and surface coatings endows the composite membrane (DCNF 1-75 /CNF/ECCur) with exceptional barrier properties, achieving a 44% reduction in water vapor transmission rate and 99% suppression of oxygen transmission rate. Moreover, the film demonstrated multifunctional properties: over 99.9% antibacterial efficacy against Escherichia coli and Staphylococcus aureus , 91% antioxidant activity, effective food preservation capability along with visual monitoring functionality. This work provides a novel approach for designing multifunctional nanocellulose-based intelligent packaging materials.
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高影响因子
POLYMER
·
2025
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IF 4.5
Biao Zhang,Fangfang Wang,Ya Ma,Lu Yao,Xudong Liu,Zhicheng Jiang,Bi Shi
Catalyst supports critically affect the efficiency and selectivity of supported metal catalysts. In this investigation, bacterial cellulose (BC) produced through bacterial fermentation was used as a catalyst support, with Pd 2+ loaded on BC and then reduced to prepare a supported Pd catalyst (Pd/BC). Owing to its nanofibrous structure and abundant hydroxyl groups exposed on the surface of BC, BC adsorbed more Pd 2+ via electrostatic interaction and promoted the dispersion of Pd particles, resulting in their smaller particle size. The high crystallinity index of BC endowed the catalyst with high thermal stability, enabling its application in the catalytic hydrogenation of vanillin (a lignin-derived platform chemical) under mild reaction conditions. Strong hydrogen bonding interaction between C6-OH on BC surface and the aldehyde group of vanillin facilitated the hydrogenation rate of vanillin. The hydrogenation of vanillin over the 3 wt% Pd/BC catalyst at 60 °C under 1.5 MPa H 2 for 2 h resulted in 98.45% vanillin conversion and 97.85% yield of vanillyl alcohol, with high recycling stability, and good catalytic universality, effectively catalyzing the hydrogenation of different lignin-derived aldehydes. This study paves the way for the application of cellulose with polyhydroxy groups in catalysis.
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CHEMICAL PAPERS
·
2025
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IF 2.5
Du Chengzhen,Hu Xiaoli,Tang Cheng,Hu Tao,Yang Xingbing,Yan Shuang,Cai Jiaqin,Chen Yao,Deng Hongyu
Cotton contains a large amount of cellulose polymer, which has good application potential for removing pollutants from wastewater due to its broad availability, low-cost, and rich functional groups. In this work, absorbent cotton was grafted with polyethylene polyamine chains on the surfaces of the cotton fibers to obtain the modified cotton adsorbent triethylenetetramine carboxymethyl cellulose amide. The surface morphology and chemical structure of this adsorbent were characterized via FTIR, 13 C NMR spectroscopy, and SEM/EDS. In addition, the adsorption performances of this adsorbent for Cu 2+ , Pb 2+ , and Cd 2+ ions were evaluated via ICP spectroscopy. The results of the adsorption experiment indicate that the modified cotton adsorbent exhibited coordination properties and affinity for multiple metal ions. The fitting results of kinetic models showed that the adsorption was dominated by chemisorption, and the adsorption process involved both monolayer and multilayer adsorption. The maximum adsorption capacities for Cu 2+ , Pb 2+ , and Cd 2+ were estimated to be 38.07, 94.27, and 195.39 mg/g, respectively. Therefore, this adsorbent derived from the abundant natural material cotton has great potential for treating wastewater polluted with heavy metals.
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CONSTRUCTION AND BUILDING MATERIALS
·
2025
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IF 8
Haixia Xiao,Xiang Lin,Jie Luo,Shenghua Yang,Hongyu Yang,Xiaming Feng,Yafeng Gao,Chaojun Wan,Jianxin Zhang
Biomass aerogel, with its renewable raw materials and excellent biodegradability, shows great potential for application in the field of green building insulation and heat insulation. However, its poor mechanical properties and inherent flammability severely limit its application in actual building scenarios. In this study, freeze-drying technology was employed to composite phosphorylated cellulose with gelatin. This preparation strategy regulates the mass ratio of phosphorylated cellulose to gelatin, leveraging the hydrogen bonding interactions between the hydroxyl and amino groups of their molecular chains to construct a “rigid skeleton-flexible connection” synergistic network structure, resulting in a fully biomass-based composite aerogel with excellent flame-retardant and mechanical properties, resulting in a fully biomass-based composite aerogel with excellent flame-retardant and mechanical properties. The “rigid-flexible” interaction between phosphorylated cellulose and gelatin endows the 3PM2G aerogel (The mass ratio is 3:2) with a low density (0.062 g/cm³) and a low thermal conductivity (0.047 W/m·K). Compared with phosphorylated cellulose aerogel without gelatin, the compressive modulus of 3PM2G aerogel was increased by 208 %. Phosphorylated cellulose and gelatin form a biomass intumescent flame-retardant system with a limiting oxygen index (LOI) as high as 73 % by providing carbon, acid, and gas sources. This study is expected to provide insights into the development of bio-based aerogels with high fire safety performance, thereby promoting green building and sustainable development.
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