CARBOHYDRATE POLYMERS
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2026
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IF 13.2
Long Zhao,Haoxiang Zhai,Yongxin Qian,Xuefei Xu,Wenhui Xing,Yifei Jiang,Gengping Wan,Guizhen Wang
The rapid expansion of high-power electronics and wearable systems exposes them to complex electromagnetic and thermal stresses. External electromagnetic interference (EMI) and heat in the environment cause marked surface warming, a compound effect that accelerates material degradation and performance decline, thereby compromising long-term device reliability and safety. To address this dual challenge, this study developed an ultra-lightweight core–shell composite aerogel material. The material was synthesized by constructing a three-dimensional (3D) porous scaffold based on bacterial cellulose aerogel (BCA), followed by in-situ polymerization of polypyrrole (PPy) on its surface to form a homogeneous core–shell structure. The core-shell architecture serves as an effective strategy for optimizing conductive networks and enhancing dielectric loss mechanisms. This design results in a minimum reflection loss (RL min ) of −48.55 dB at 6.80 GHz, with an effective absorption bandwidth (EAB) of 6.64 GHz, covering the range from 9.68 to 16.32 GHz. Additionally, its highly porous structure forms continuous air barriers and thermal resistance paths, achieving thermal insulation with a temperature reduction of ~5.4 °C (verified by infrared thermography). This work proposes a synergistic design for dual-functional electromagnetic wave absorption (EWA)/thermal insulation materials, offering a scalable strategy for fabricating lightweight, high-performance protective materials.
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BIOMACROMOLECULES
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2026
·
IF 5.9
JiaJun Bi,TianHao Chen,ZeWei Li,YuPeng Zha,Xiao Zhou,YaHao Dong,ZhanAo Lv
Cellulose is highly valuable due to its ready availability, biodegradability, and easy chemical modification. Recently, studies have focused on the chemical modification of cellulose and utilized it as a support for stabilizing metals. In this study, a Schiff base- and imidazole-functionalized cellulose-supported Pd (Cell-SB-IM-Pd) catalyst was prepared and used for the 4-nitrohpenol reduction as well as the synthesis of biaryls. Compared with the raw Cell-Pd catalyst (70%), Cell-SB-IM-Pd exhibited higher catalytic efficiency (90%) in Suzuki reactions, which was attributed to the introduction of C═N and imidazole, providing charge-transfer interaction between them and Pd. The Cell-SB-IM-Pd also showed good to excellent yields (up to 99%) for various substrates in Suzuki reactions under mild conditions. Likewise, we also demonstrated the stability and efficiency of Cell-SB-IM-Pd in the 4-nitrophenol reduction at room temperature in water, with an apparent rate constant of 9.074 × 10–2 min–1. This work provides more insights into the further utilization of cellulose as a Pd host matrix for converting organic pollutants and promoting sustainable chemical reactions.
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Scientific Reports
·
2026
·
IF 4.9
Zhu Lei,Xu Honghua,Chen Rui,Zhang Can,Wang He,Li Yong,Xu Li,Wang Biao,Xu Ziqiang
Cellulose paper plays the key role in the oil-paper insulation system ensuring safe and reliable operation of power systems, which faces challenges related to its inherent low thermal conductivity, high dielectric constant and hydrophilicity. Herein, polymerization reactions are induced on the surface and within the bulk of the cellulose insulating paper via atmospheric-pressure low-temperature plasma with a precursor formed by incorporating BN powders into octamethylcyclotetrasiloxane (OMCTS). As indicated by SEM, EDS, FTIR, and XPS results, a low-polarity cross-linking network is constructed within intrinsic porous structures of the paper, comprehensively improving thermal, electrical and waterproof performances. The thermal conductivity is increased by 15.9%, thereby enabling a significant enhancement in the heat dissipation capability. The relative dielectric constant of the insulating paper is decreased by 27.3%, maintaining effective dielectric adaptation with insulating oil. The surface and bulk insulation performance of the oil-impregnated paper is reinforced, with a 9.4% increase in the flashover voltage and a 17.5% improvement in bulk breakdown strength. The wetting property is changed from hydrophilic to hydrophobic, reducing water absorption by 32.6%, inhibiting the transport of water molecules. This work provides a promising approach for developing high-performance insulating paper for safe and stable power transmission.
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BIOMACROMOLECULES
·
2026
·
IF 5.9
Rongrong Qiao,Zhijiang Shao,Yuan Xu,Heyu Chen
Lignin-containing cellulose nanofibrils (LCNFs) offer intrinsic UV shielding, improved hydrophobicity, and thermal stability, yet their dark appearance limits applications requiring high whiteness and faithful color rendering. Here, we report a strategy that breaks the long-standing linkage between lignin richness and dark coloration by combining lignin pre-enrichment with chromophore-selective oxidative whitening. Specifically, dilute H2SO4 pretreatment enriches lignin by removing acid-labile carbohydrates, and subsequent alkaline H2O2 bleaching eliminates chromophores with controlled lignin loss. Mechanical fibrillation then yields whitened LCNFs (wLCNFs) with high whiteness of 70–82 while retaining 20.20–25.20 wt % lignin; notably, the highest lignin wLCNF contains more lignin than the native feedstock (25.20 vs 23.40%). Within a moderate processing window, wLCNF films show ∼120 MPa tensile strength, reduced water vapor transmission, and strong UV blocking. As a proof-of-concept, adding 5 wt % wLCNF to a commercial sunscreen raises SPF from 15.8 to 37.6 without visible tinting.
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CARBOHYDRATE POLYMERS
·
2026
·
IF 13.2
Jingguo Cao,Tengfei He,Xinyu Zhang,Guozheng Sun,Kai Liao,Chengqian Wang,Ke Li,Qun Liu,Yu Zhang
To address the poor moldability, high cost, and insufficient structural stability of conventional CO₂ adsorbents, a low-cost amine-grafted spherical silica/cellulose composite aerogel (AGSSCA) was fabricated in this work. Using defatted cotton-derived cellulose and diatomaceous earth-derived sodium silicate as raw materials, a homogeneous solution was obtained through alkali dissolution and blending, and silica/cellulose spherical gels were fabricated in situ via a droplet gelation approach; a series of AGSSCA materials were prepared through graft modification using the amino silane coupling agent (APTES); the effects of component ratios and grafting conditions on the material structure and CO₂ adsorption performance were systematically investigated. The results show that at 25 °C, the material exhibits an optimal CO₂ adsorption capacity of 2.14 mmol/g, which decreased by only 5% after five cycles. The CO₂ adsorption capacity increased with increasing silica content in the composite framework. Structural characterization suggested that APTES formed Si–O–Si and Si–O–cellulose covalent linkages within the silica/cellulose framework, thereby generating a porous three-dimensional interpenetrating network structure, with a maximum BET surface area of 300.87 m 2 /g.
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MINERALS ENGINEERING
·
2026
·
IF 6
Qing Sun,Wei Chen,Yuhang Che,Siyan Zou,Jie Zhou,Kai Zeng,Yangge Zhu
A corn stalk-derived carboxymethyl cellulose (CMCQ) was successfully synthesized. • CMCQ achieved efficient flotation separation of molybdenite from talc. • CMCQ selectively adsorbed onto the talc surface and reduced its hydrophobicity. • CMCQ weakened basal-plane hydrophobic attraction for molybdenite-talc separation. Molybdenite (MoS 2 ) is a key mineral resource for molybdenum extraction, but its natural floatability is similar to that of the associated gangue mineral talc (Mg 3 Si 4 O 10 (OH)), making effective separation difficult. Conventional polymeric depressants, due to their high viscosity, tend to adsorb non‑selectively on both molybdenite and talc surfaces, resulting in a low grade of molybdenum. Hence, this study synthesized a corn stalk‑derived carboxymethyl cellulose (CMCQ) from low‑viscosity agricultural waste (corn stalk) and applied it for the first time to the flotation separation of molybdenite from talc. Through single-mineral flotation tests, adsorption analysis, contact angle measurements, Zeta potential measurements, Fourier-transform infrared spectroscopy (FTIR), in situ optical microscope observation, and Extended Derjaguin-Landau-Verwey-Overbeek (EDLVO) theory calculations, the depression performance and selective mechanism of CMCQ were systematically evaluated. The results show that CMCQ strongly depresses talc, with a talc recovery as low as 10.2% at a concentration of 100 mg/L, while its depression on molybdenite remains weak. Compared with commercial carboxymethyl cellulose (CMC), CMCQ reduces talc recovery from over 60.0% to 10.2% at the same concentration, demonstrating a significantly improved depressing effect. Mechanistic studies reveal that CMCQ selectively adsorbs onto the talc surface, reduces its hydrophobicity, and weakens the hydrophobic attraction between the basal planes of molybdenite and talc. As a result, particle adhesion is largely eliminated, leading to efficient selective separation. This study not only facilitates the high-value utilization of corn straw but also provides a novel, efficient depressant for the flotation separation of molybdenite from talc, which is of great significance for promoting sustainable mineral processing technology. A Corn Stalk-Derived Carboxymethyl Cellulose for Efficient Molybdenite-Talc Flotation Separation by Weakening Hydrophobic Attraction. Download: Download high-res image (165KB) Download: Download full-size image
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CELLULOSE
·
2026
·
IF 4.6
Han Qiuxia,Xu Yanmeng,Wang Fei,Zhang Qiang,Chen Yong,Lv Shaoping
In a synergistic unit of N -halamine and cationic salt, an increased ratio of the N -halamine elicited a higher biocidal efficacy. However, the upper limit to the N -halamine content where the synergism is not impaired because of the diminished role of the cationic salt is still unknown. Herein, 4 N -halamine sites, one more than the current maximum, were combined with 1 cationic salt in a composite unit for the evaluation of the effect of such a ratio on synergism. Briefly, 4-aminopyridine was quaternized with 1-chlorohexane to form a cationic pyridinium. Uramil and the cationic pyridinium were successively bonded to allylsuccinic anhydride via ammonolysis and amidation to form a product with 1 cationic salt and 4 N–H bonds as N -halamine precursors. The allylic C=C of the product subsequently reacted with Si–H of poly(methylhydrosiloxane) via hydrosilylation to prepare a polysiloxane that was interpenetrated into cotton cellulose at 50 °C and 28 MPa in supercritical CO 2 . Chlorination of N–H bonds transformed each polysiloxane pendant to the target composite unit that existed in a 71 nm modification layer on the interpenetrated cotton. Antibacterial tests showed that the designed composite units completely eradicated ~ 10 7 CFU of Staphylococcus aureus and Escherichia coli in 15 min, an efficacy between those of a counterpart with only 4 corresponding N -halamine sites and a reported unit with 1 N -halamine and 1 cationic center under comparable conditions, which suggested that the increase of N -halamine to such a ratio did not further benefit synergism. Evaluations of biocidal stability and rechargeability indicated that the modifier was chemically robust and scCO 2 interpenetration produced a durable connection between the modifier and cellulose. Graphical
The alternative text for this image may have been generated using AI.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2026
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IF 8.7
Xinyu Li,Tianfeng Hu,Sai Wang,Kun Du
Green-synthesized Al-CPs@CMC using CMC and l -glutamic acid. • High IC adsorption capacity (434.783 mg/g), following Langmuir and PSO models. • Excellent reusability (>80% removal after 5 cycles) demonstrates good stability. • Provides a sustainable strategy for anionic dye removal from wastewater. Based on the principles of green chemistry, a novel aluminum-based coordination polymer composite was successfully prepared via a mild aqueous coprecipitation method using carboxymethyl cellulose (CMC) and l -glutamic acid ( l -Glu) as building blocks. The as-prepared material exhibited excellent selective adsorption performance towards the anionic dye indigo carmine (IC). The adsorption behavior was well described by the Langmuir monolayer model and pseudo-second-order kinetic model, with a theoretical maximum adsorption capacity of 434.783 mg/g. Thermodynamic analysis indicated that the adsorption process was spontaneous and exothermic. Mechanism studies revealed that the adsorption was predominantly driven by electrostatic attraction between the protonated amino groups on the composite surface and the dye anions, supplemented by hydrogen bonding and coordination interactions. After five consecutive adsorption–desorption cycles, the removal efficiency for IC remained above 80%, demonstrating good stability. This work provides a new strategy for developing efficient, green, and biodegradable materials for the treatment of dye-containing wastewater.
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JOURNAL OF PHYSICAL CHEMISTRY B
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2026
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IF 3.2
Shu-Gui Yang,Ruixin Wang,Jinkun Wang,Ting-Ting Liu,Liang-Qing Zhang,Feng Liu
The rational design of three-dimensional (3D) piezoelectric architectural units represents a cutting-edge approach for fabricating highly sensitive piezoelectric materials. However, the precise control over the formation of piezoelectric crystals during the construction of 3D polymer architectures remains a formidable challenge. Here, we report a novel strategy that enables the induction of dominant polar forms while simultaneously constructing their 3D architectures. Utilizing porous cellulose templates, poly(vinylidene fluoride) (PVDF) was self-assembled from solution into microspheres with diameters approximately 3 μm. During this self-assembly process, hydrogen bonding and dipole interactions between PVDF molecules and the cellulose template could facilitate the nucleation and growth of the polar forms. By manipulating the porous structure of cellulose, we successfully achieved two distinct spatial arrangements of PVDF polar microspheres: a homogeneous distribution of PVDF polar microspheres interspersed among the cellulose nanofibrils, and the aggregation of PVDF polar microspheres on the cell wall of the template. Our findings reveal that the former arrangement demonstrates superior piezoelectric sensitivity, boasting a piezoelectric voltage constant of 0.42 V·m/N at a low mass density of 0.3 g/cm3─approximately three times greater than that of the pure PVDF and the cellulose template alone. The remarkable piezoelectric sensitivity observed in the 3D porous PVDF/cellulose composite stems from the fact that the compressive stress applied to the polar microspheres induces a substantial effective electric displacement in the direction of the compressive force. This study opens the door to a new class of rationally designed piezoelectric sensors for wearable human–computer interaction applications.
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Journal of Building Engineering
·
2026
·
IF 8.1
Jin Li,Haoxiang Lyu,Yi Fang,Xueyan Liang,Peiyuan Chen,Jialai Wang
A novel EC-coated phase change microcapsule (EC-CenoPCM) was developed to prevent PCM leakage in cementitious materials. • EC coating (2 wt%) completely sealed perforated cenospheres while retaining a high melting enthalpy of 97.15 J/g. • EC-CenoPCM effectively regulated hydration heat via physical thermal buffering, delaying and attenuating exothermic peaks. • The EC shell enhanced capsule–matrix bonding, reduced harmful pores, and improved 28-day compressive strength. To enhance the thermal energy storage capacity of cementitious materials while overcoming phase change material (PCM) leakage and interfacial incompatibility, an effective microencapsulated PCM (MPCM) was developed using ethyl cellulose (EC)–coated paraffin-loaded perforated cenospheres (CenoPCM). Paraffin wax was first vacuum-impregnated into acid-etched cenospheres and subsequently sealed by an EC shell via a solvent evaporation process. Morphological and chemical characterizations confirmed that a continuous and compact EC coating was formed, with 2 wt% EC identified as the optimal concentration, completely preventing PCM leakage at 60 °C while retaining a melting enthalpy of 97.15 J/g. When incorporated into cement mortar as a partial sand replacement, EC-CenoPCM effectively regulated hydration heat through a physical heat-buffering mechanism associated with the solid–liquid phase transition of paraffin wax. Isothermal calorimetry and semi-adiabatic temperature rise tests revealed delayed and attenuated exothermic peaks without altering the cumulative hydration heat, indicating that hydration regulation primarily through the solid-liquid transition of PCM. Microstructural observations and pore structure analysis demonstrated that the EC coating significantly enhanced capsule–matrix interfacial bonding and reduced the proportion of harmful pores by suppressing leakage-induced defects. As a result, mortar containing 3 vol% EC-CenoPCM achieved a higher 28-day compressive strength (57.8 MPa) and a moderated reduction in thermal conductivity compared with mortars incorporating uncoated CenoPCM. These findings demonstrate that ethyl cellulose–coated cenospheres provide an effective and promising strategy for integrating latent heat storage into cementitious materials, enabling hydration heat regulation while preserving mechanical and thermal performance. This approach offers promising potential for hydration-temperature control in mass concrete and the development of thermally functional cementitious components.
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LANGMUIR
·
2026
·
IF 4.4
Ye Xin,Lian Xiaodong,Lu Zhaohan,Wang Zhiyong
As one of the most widely used materials
for paintings
and archival
records, paper has laid the foundation for the flourishing development
of human civilization. However, during long-term storage, paper inevitably
undergoes deterioration processes such as acid hydrolysis and oxidative
degradation under the combined influence of intrinsic and extrinsic
factors, resulting in yellowing and a decline in mechanical properties.
Consequently, there is an urgent need to develop comprehensive conservation
materials that integrate both reinforcement and antioxidant functions.
In this work, fullerenol (FOL) was introduced into the field of paper
cultural relic conservation as an efficient radical scavenger and
ultraviolet (UV) shielding component. It was compounded with hydroxypropyl
cellulose (HPC), which possesses excellent film-forming ability and
fiber affinity, to construct an FOL/HPC (FH) composite protective
system. This system addressed the limitations of single-component
protective materials, namely restricted functionality and insufficient
durability. Experimental screening and optimization demonstrated that
the formulation comprising 0.067 g/L FOL and 6.0 g/L HPC (denoted
FH4) exhibited the best overall performance. FH4 treatment not only
further enhanced the mechanical properties of the paper but also demonstrated
superior protective efficacy under accelerated aging conditions. The
incorporation of FOL effectively shielded UV radiation and scavenged
reactive oxygen species (ROS) generated during cellulose degradation,
thereby blocking the photo-oxidative chain reaction at its source.
When applied to acidified old newspapers, the system likewise delivered
excellent protective performance, validating its applicability and
compatibility across different substrates. Furthermore, the synergistic
mechanism of the FH composite system was elucidated by combining experimental
characterizations with theoretical calculations. This study provides
both experimental and theoretical foundations for the expanded application
of fullerenol in paper cultural relic conservation and offers new
insights into the development of multifunctional, long-lasting, and
safe preventive conservation materials for paper-based cultural heritage.
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COMPOSITES SCIENCE AND TECHNOLOGY
·
2026
·
IF 9.9
Bin Ye,Haijiao Yu,Yu Chen,Jinbo Yao,Guangping Han,Yanbo Liu,Wanli Cheng
CNCs enhance radiative cooling by tuning structural scale and optical parameters. • CNCs promote PEG crystallization for efficient thermal energy storage and release. • Simultaneous regulation of cooling and thermal buffering by CNCs enhances comfort. Thermal comfort is increasingly challenged by heat waves and abrupt temperature fluctuations, requiring materials that dissipate heat while buffering thermal shocks. Existing combinations of radiative cooling and phase change systems are often achieved by stacking or mixing components, leaving structural design and performance regulation largely independent, which limits the mutual reinforcement of steady cooling and transient thermal regulation. Herein, we employ coaxial electrospinning to construct a core-shell fibrous film composed of polyethylene glycol@poly (vinylidene fluoride-co-hexafluoropropylene)/cellulose nanocrystals (PEG@PVDF-HFP/CNCs) for the synergistic regulation of radiative cooling and phase change performance. The shell achieves 94.91% solar reflectivity (0.3-2.5 μm) and 97.56% infrared emissivity (8-13 μm), while the core provides high thermal shock resistance with a phase change enthalpy of 47.3 J g −1 . Crucially, CNCs enhance radiative cooling by optimizing structural scale and optical parameters, while simultaneously improving phase change thermal regulation by inducing PEG crystallization to enhance latent heat storage, achieving synergistic enhancement of both functions within the same material system. Outdoor measurements demonstrate a steady-state temperature reduction of 10.5°C together with effective buffering against abrupt ambient temperature fluctuations. This work achieves synergistic optimization of radiative cooling and phase change performance within one system, providing a novel pathway for thermal comfort regulation under dynamic environments. Download: Download high-res image (500KB) Download: Download full-size image
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危险品化学品经营许可证（带存储）