CELLULOSE
·
2026
·
IF 4.6
Zhou Hong,Zheng Shuzhen,Zhou Chunhua,Ma Jianfeng
The practical application of cement-based materials is often constrained by their inherent brittleness and low flexural strength. Although both microcrystalline cellulose (MCC) and graphene oxide (GO) show potential as reinforcing agents, achieving synergistic enhancement of compressive strength and flexural strength of cement-based materials remains an urgent problem to be solved. This study developed a novel GO-MCC composite (GOMCC) via a combined ultrasonic and chemical modification approach, aiming to achieve a synergistic reinforcement effect. Characterization techniques (FTIR, TEM, XRD, DLS) confirmed the successful formation of the composite between MCC and GO, which effectively inhibited agglomeration and enhanced interfacial bonding. When incorporated into cement paste at a dosage of 1.0 wt.‰, the GOMCC-2 composite (GO: MCC = 3:100) significantly improved the flexural strength, with increases of 18.2%, 14.6%, and 26.4% at 3, 7, and 28 days, respectively. Microstructural and hydration analysis (BET, SEM, XRD, isothermal calorimetry) revealed that the oxygen-containing functional groups of GO and the hydroxyl groups of MCC acted synergistically to strengthen the interfacial bonding with cement hydration products (C–S–H gel). Furthermore, the GOMCC composite served as a nucleation site for hydration products, promoting the formation of a denser microstructure with a refined pore structure, and contributed to crack-bridging effects, thereby effectively enhancing the mechanical properties of the cement-based material.
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Polymers
·
2026
·Vol. 18
·期 10
·1187
·
IF 5.8
Xiaodong Bai,Zeyu Xue,Moubo Wang,Molin Song,Mengqian Yang,Jianpeng You,Yumei Luo
The temperature-sensitive plugging agent (HAAN) was synthesized via free-radical graft polymerization using hydroxypropyl methyl cellulose (HPMC), acrylamide (AM), 4-acryloylmorpholine (ACMO) and N-vinyl-2-pyrrolidone (NVP) as the main monomers. HAAN demonstrates potential for addressing the frequent lost circulation problems encountered during the drilling of complex formations. The target product was characterized by FTIR and1H NMR. Its phase transition behavior was verified via temperature-dependent UV-visible transmittance measurements and high-temperature rheological tests. The experimental results show that the plugging agent possesses good temperature and salt tolerance, and its rheological properties can be enhanced by incorporation into drilling fluid. It demonstrates effective plugging performance both at room temperature and under high-temperature conditions, thereby contributing to improved wellbore stability. It provides a new idea for green multifunctional application of cellulose in water-based drilling fluid.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2026
·
IF 8.7
Haoran Shi,Jie Chen,Dongyang Han,Changhui Wang,Wenjun Huang,Jiandong Zhuang,Yan Yu,Xuexia Zhang
Metal-organic framework (MOF)-loaded cellulose aerogels show considerable promise for remediating water polluted by heavy metal ions. However, their practical application has been limited by energy-intensive drying methods and suboptimal performance. Herein, a low-cost, scalable preparation strategy to fabricate a MOF-loaded cellulose aerogel (denoted as b-CAT-Z) via ambient drying, employing bidirectional freezing combined with solvent exchange, without the need for toxic crosslinking agents. Specifically, tannic acid (TA)-modified cellulose nanofibers (CNF) and aramid nanofibers (ANF) form a robust skeleton, while MOFs (ZIF-8) anchored via hydrogen bonding and coordination interactions serve as nanofillers to enhance Pb(II) adsorption. The optimized b-CAT-Z aerogel exhibited an ultra-low density (20.3 mg/cm 3 ) and excellent mechanical properties, with a specific strength of 10.93 kN·m/kg. More importantly, benefiting from the construction of long-range ordered water transport channels, the b-CAT-Z aerogel prepared via bidirectional freezing demonstrates outstanding performance in adsorbing Pb(II), exhibiting a superior adsorption capacity (584.4 mg/g), removal efficiency (97.4%), and adsorption kinetics (reaching equilibrium within 180 min). These properties confer significant advantages over its counterparts prepared by random freezing (441.0 mg/g, 300 min) and unidirectional freezing (514.9 mg/g, 300 min). Remarkably, the b-CAT-Z aerogel still maintains a Pb(II) removal efficiency as high as 80.3% even after six adsorption-desorption cycles. Density Functional Theory (DFT) calculations revealed that the oxygen-containing and imidazole groups in b-CAT-Z strongly bind Pb(II), acting as efficient adsorption sites. The b-CAT-Z aerogel demonstrated favorable recyclability. This work presents an ambient-dried strategy for fabricating high-performance cellulose aerogels, providing valuable insights for designing next-generation heavy metal adsorbents.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2026
·
IF 8.7
Beibei Wang,Sentao Wei,Licheng Zhou,Guochao Yang,Jian Wang,Le Xu,Kushairi Mohd Salleh,Qun Wu
In this study, a pilot-scale straw cellulose-based polyurethane biocomposite modified with phytic acid (PA) and Fe 2 O 3 (SC/PA/Fe) was developed through an eco-oriented and scalable fabrication route, and its flame retardance, physical properties, colour characteristics, and application potential were systematically investigated. The composite was fabricated via sequential spray-assisted delignification, stepwise spray impregnation of PA and Fe 2 O 3 , high-shear reactive blending, and room-temperature press molding. The optimized SC/PA/Fe achieved a limiting oxygen index (LOI) of 27.9 and a total smoke release (TSR) of 48.89 m 2 /m 2 , demonstrating markedly improved fire safety relative to untreated SC. Mechanistic analysis indicated that the synergistic effect of PA and Fe 2 O 3 facilitated the formation of a stable phosphorus-rich char layer during combustion, which enhanced thermal stability and reduced smoke generation. In addition, interfacial cross-linking between PA and the -NCO groups of TDI helped preserve the structural integrity of the composite, resulting in a tensile strength close to 1.0 MPa and a bending strength of 5.2 ± 0.2 MPa. Based on Material Driven Design (MDD), the warm red-toned appearance together with the improved flame-retardant performance suggests that SC/PA/Fe is a promising candidate for non-load-bearing interior applications, such as furniture surfaces and decorative panels.
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CARBOHYDRATE POLYMERS
·
2023
·
IF 11.2
Aihua Qiao,Renliang Huang,Jiangjiexing Wu,Wei Qi,Rongxin Su
Oily sewage caused by oil spill accidents has become a severe problem in the last decades. Hence, two-dimensional sheet-like filter materials for oil/water separation have received widespread attention. Porous sponge materials were developed using cellulose nanocrystals (CNCs) as raw materials. They are environmentally friendly and easy to prepare, with high flux and separation efficiency. The 1,2,3,4-butane tetracarboxylic acid cross-linked anisotropic cellulose nanocrystalline sponge sheet (B-CNC) exhibited ultrahigh water fluxes driven by gravity alone, depending on the aligned structure of channels and the rigidity of CNCs. Meanwhile, the sponge gained superhydrophilic/underwater superhydrophobic wettability with an underwater oil contact angle of up to 165.7° due to its ordered micro/nanoscale structure. B-CNC sheets displayed high oil/water selectivity without additional material doping or chemical modification. For oil/water mixtures, high separation fluxes of approximately 100,000 L·m −2 ·h −1 and separation efficiencies of up to 99.99 % were obtained. For a Tween 80-stabilized toluene-in-water emulsion, the flux reached >50,000 L·m −2 ·h −1 , and the separation efficiency was above 99.7 %. B-CNC sponge sheets showed significantly higher fluxes and separation efficiencies than other bio-based two-dimensional materials. This research provides a facile and straightforward fabrication method of environmental-friendly B-CNC sponges for rapid, selective oil/water separation.
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ACS Omega
·
2023
·
IF 4.1
Ning Shi,Tianlang Zhu,Hongyan Zhang,Hongsheng Huang,Liang Zhou,Ying Liu,Riyang Shu
Catalytic conversion of cellulose into the novel platform molecule 2,5-hexanedione (HXD) is regarded as one feasible approach for high-value utilization of biomass resources. Here, we reported one efficient way of one-pot conversion of cellulose into HXD with high yield of 80.3% in H2O and tetrahydrofuran (THF) mixture within Al2(SO4)3 combined with Pd/C as a catalyst. In the catalytic reaction system, Al2(SO4)3 could catalyze the conversion of cellulose into 5-hydroxymethylfurfural (HMF), and Pd/C combined with Al2(SO4)3 could catalyze the hydrogenolysis of HMF into furanic intermediates such as 5-methylfurfuryl alcohol and 2,5-dimethylfuran (DMF) without causing over-hydrogenation of these furanic intermediates. These furanic intermediates were finally transformed into HXD catalyzed by Al2(SO4)3. Besides, the H2O/THF ratio could significantly influence the reactivity of the hydrolytic furanic ring-opening of the furanic intermediates. The catalytic system also showed excellent performance on the conversion of other carbohydrates (glucose and sucrose) into HXD.
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ACS Applied Electronic Materials
·
2023
·
IF 4.7
Guixing Wang,Xiaona Liu,Zhaoping Song,Dehai Yu,Guodong Li,Huili Wang,Shaohua Ge,Wenxia Liu
Flexible pressure sensors have attracted widespread attention in recent years due to their potential applications for health monitoring and human–machine interfaces. However, the fabrication of environmentally friendly and well-performing pressure sensors using biobased materials remains a great challenge. Herein, a compressible carbon aerogel was prepared by sequential microfibrillation, periodate oxidization, and tannic acid (TA) cross-linking of cellulose fibers (CFs) followed by freeze-drying the as-prepared CF suspension and high-temperature pyrolysis of the obtained CF aerogel. The microfibrillation endows the carbon aerogel with a hierarchical structure, which improves the bonding strength and compressibility of the carbon aerogel. Periodate oxidation and TA cross-linking improved the mechanical properties of the carbon aerogel, while pyrolysis endowed the carbon aerogel with excellent conductivity, enabling the carbon aerogel to be a good pressure-sensing material. When assembled into a pressure sensor, the sensor shows a high sensitivity of 4 kPa–1, a fast response/recovery time of 32/30 ms, a low-pressure detection limit of 0.8 Pa, and good stability and excellent reproducibility (3000 cycles at 0.5 kPa). Moreover, the pressure sensor can be used to accurately monitor various human activities and also spatially resolve pressure variations when integrated into a sensor array. The pressure sensor also responds linearly to increased temperature and humidity. These results suggest that this hierarchical carbon aerogel-based pressure sensor has great potential for application as a multifunctional sensor.
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CARBOHYDRATE POLYMERS
·
2023
·
IF 11.2
Hao Ling,Lei Wang,Qixuan Lin,Quanbo Huang,Xiaoqian Zhang,Junli Ren,Ning Li,Cheng Zhou,Zhiwei Lin,Jingpeng Zhou,Wenguang Wei,Xiaohui Wang
Separating films with both high efficiency and large flux are desperately needed to meet the rising demand for the treatment of oily wastewater, while traditional oil/water separation papers with high separation efficiency usually suffered from low flux due to the unsuitable size of filtration pores. Herein, we report a bio-based porous, superhydrophobic , and antimicrobial hybrid cellulose paper with tunable porous structures for high flux oil/water separation. The size of pores in the hybrid paper can be tuned by both physical supports provided by the chitosan fibers and the chemical shielding supplied by the hydrophobic modification. The hybrid paper with increased porosity (20.73 μm; 35.15 %) and excellent antibacterial properties can efficiently separate a wide range of oil/water mixtures, solely by gravity, with outstanding flux (maximum of 23,692.69 L m −2 h −1 ), tiny oil interception, and high efficiency of over 99 %. This work provides new sights in the development of durable and low-cost functional papers for rapid and efficient oil/water separation.
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INDUSTRIAL CROPS AND PRODUCTS
·
2023
·
IF 5.9
Mei Chen,Pingxiong Cai,Yuanfeng Pan
Agrochemicals play an irreplaceable role in the process of agricultural production. However, unreasonable use of agrochemicals can cause serious harm to the environment. Therefore, the controlled release of agrochemicals is critical in the sustainable development of agriculture and benefiting the environment. In this work, a composite hydrogel was prepared from dialdehyde cellulose and reinforced by polyvinyl alcohol (PVA) while cysteamine dihydrochloride acted as a cross-linking agent to render the hydrogel pH and redox-responsive for the controlled release of a model agrochemical, i.e., salicylic acid (SA). The aldehyde content in the modified cellulose reached 10.65 mmol/g while the yield of oxidized cellulose was 55%. The structure, morphology and properties of the composite hydrogels were characterized by Fourier transform infrared (FTIR), X-ray diffraction (XRD), thermal gravimetric analysis (TGA) and scanning electron microscopy (SEM). In addition, the release behavior of SA loaded in the hydrogels under various different conditions was also studied. The results showed that the addition of PVA could improve the mechanical properties of hydrogels, and the cumulative release of SA could be modulated by varying release conditions or environmental stimuli; and the release kinetics was well fitted with the Korsmeyer-Peppas model. Moreover, the release of SA could be promoted under acidic conditions and in the presence of reducing agent glutathione (GSH). The findings from this work particularly benefit the agricultural production.
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ADVANCED FUNCTIONAL MATERIALS
·
2023
·Vol. 33
·期 31
·2301870
·
IF 19
Dingding Zong,Wenya Bai,Xia Yin,Jianyong Yu,Shichao Zhang,Bin Ding
The expeditious growth of modern transportation and industrialization has given rise to serious noise pollution, which has brought disaster to the world economy and human health. Most existing sound-absorber with single pore structures suffer from large weight and the incidence and dissipation of noise that are difficult to be enhanced simultaneously. Herein, gradient-structured elastic ceramic nanofiber aerogels with cellulose nano-nets are successfully structured through step-by-step directional freeze-casting technology, which has a gradient structure of “larger pore-middle pore-smaller pore” in the propagation direction of sound waves and dual nanofiber networks perpendicular to the direction of sound waves. The integration of gradient pore structures and dual nanofiber networks effectively improves the acoustic contact area of aerogels while increasing the acoustic incidence. The noise reduction coefficient of the obtained lightweight gradient aerogels (average density only 9 mg cm −3 ) reaches 0.58, and the low-frequency air compressor noise can be reduced by 23.1 dB. Besides, the silica sol with hydrophobic groups endows gradient aerogels with good mechanics (plastic deformation only 5.7% after 1000 compressions) and superhydrophobic properties (water contact angle of ≈150°). The successful construction of gradient-structured dual network nanofiber aerogels will offer new horizons for the upgrading of nextgen noise absorbers.
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JOURNAL OF HAZARDOUS MATERIALS
·
2023
·
IF 13.6
Xiang Ma,Shuang Zhou,Junting Li,Fei Xie,Hui Yang,Cheng Wang,Bradley D. Fahlman,Wenjiang Li
Cellulose-based carbon aerogels as biodegradable and renewable biomass materials have presented potential applications in oil/water separation. Herein, a novel carbon aerogel composed of natural microfibrils/regenerated cellulose (NM/RCA) was directly prepared by economical hardwood pulp as raw material using a novel co-solvent composed of deep eutectic solvent (DES) and N-methyl morpholine-N-oxide monohydrate (NMMO·H 2 O). In addition, the morphology and structure of the filiform natural microfibers could be remained after carbonized at 400 ℃, which resulted in a low density (8–10 mg cm −3 ), high specific surface area (768.89 m 2 g −1 ) and high sorption capability. In addition, the aerogel exhibited high compressibility , outstanding elasticity, excellent fatigue resistance, and recyclability (80.5% height recovery after repeating 100 cycles at the strain of 80%). Due to the morphology and composition of the carbonized microfiber surface, the superhydrophobic materials with a water contact angle of 151.5°, could sorb various oils and organic solvents with 65–133 times its own weight and maintain 91.9% sorption capacity after 25 cycles. In addition, the aerogels could achieve the continuous separation of carbon tetrachloride (CCl 4 ) from water with a high flux rate of 11,718.8 L m −2 h −1 . Therefore, our prepared NM/RCA aerogels are anticipated to have broad potential applications in oil purification and contaminant remediation.
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ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Yide Liu,Kai Li,Jiuyong Yao,Xiankai Li,Yanzhi Xia
Nanocomposite conductive fibers are of great significance in applications of wearable devices, smart textiles, and flexible electronics. Integration of conductive nanomaterials into flexible bio-based fibers with multifunctionality remains challenging due to interface failure, poor flexibility, and inflammability. Although having broader applications in textiles, regenerated cellulose fibers (RCFs) cannot meet the requirements of wearable electronics owing to their intrinsic insulation. In this study, we constructed conductive RCFs fabricated by coordinating copper ions with cellulose and reducing them into stable Cu nanoparticles coated on their surface. The Cu sheath offered excellent electrical conductivity (4.6 × 105 S m–1), electromagnetic interference shielding, and enhanced flame retardance. Inspired by plant tendrils, the conductive RCF was wrapped around an elastic rod to develop wearable sensors for human health and motion monitoring. The resultant fibers not only form stable conductive nanocomposites on the fiber surface by chemical bonds but also exhibit a huge potential for wearable devices, smart sensors, and flame-retardant circuits.
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