INDUSTRIAL CROPS AND PRODUCTS
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2024
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IF 5.6
Xinxin Luan,Kefeng Zhang,Wei Shen,Baolong Zhu,Zhongliang Su,Lu Li,Xiangmin Meng,Jinhui Pang
Hydrogel-based capacitors have garnered significant interest due to their diverse applications and alignment with the principles of green chemistry. An antifreeze cellulose-based hydrogel with excellent mechanical, conductive, and self-healing properties was successfully prepared in this study using a simple method. The incorporation of TA@WSCA (tannic acid-coated water-soluble cellulose acetate) and Al 3+ as dual crosslinkers in the hydrogel markedly enhances both its mechanical and self-healing properties. The hydrogel exhibits impressive tensile strength and toughness, reaching 932.2 kPa and 3.294 MJ/m 3 , respectively. Remarkably, it maintains excellent flexibility and conductivity within the temperature range of −40°C to 25°C. In addition, the supercapacitor composed of TA@WSCA-Al 3+ -PAA hydrogels has a capacitance of up to 234 F/g and an extremely long cycle life. After 10,000 cycles of charging and discharging, its capacitor retention rate can still reach more than 90%. In conclusion, this study introduces a straightforward approach for fabricating flexible supercapacitors with multifunctionality, providing innovative insights for the advancement of wearable devices.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2024
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IF 7.7
Ziyang Chang,Shuo Zheng,Shouyi Han,Xueren Qian,Xiaohong Chen,Haiping Wang,Dingqiang Liang,Daliang Guo,Yanguang Chen,Huifang Zhao,Lizheng Sha
Along with the developing of flexible electronics, there is a strong interest in high performance flexible energy storage materials. As natural carbohydrate polymer, cellulose fibers have potential applications in the area due to their biodegradability and flexibility. However, their conductive and electrochemical properties are impossible to meet the demands of practical applications. In this study, cellulose fibers were combined with polyaniline to develop novel paper-based supercapacitor electrode material. Cellulose fibers were firstly coordinated to Cu(II) and subsequently involved in polymerization of polyaniline. Not only the mass loading of polyaniline was significantly increased, but also an impressive area specific capacitance (2767 mF/cm 2 at 1 mA/cm 2 ) was achieved. The developed strategy is efficient, environmentally friendly, and has implications for the development of cellulosic paper-based advanced functional materials.
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PROGRESS IN ORGANIC COATINGS
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2024
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IF 6.5
Mengnan Yu,Rongzhan Liu,Yanwei Du,Zhenyu Ni
Cotton fabric is widely used for its excellent wearability but often suffers from drawbacks such as poor stain resistance, susceptibility to corrosion, and low colorfastness. Here, we introduce a novel method to create colorful superhydrophobic cotton fabric using octadecylamine-modified dialdehyde cellulose (DAC/ODA) particles as building units, which are synthesized via a Schiff base reaction and subsequently dyed with active dyes. Leveraging the film-forming ability of ODA and the affinity between cellulose materials, DAC/ODA formed a robust coating on the cotton surface, with its microstructure precisely controlled through thermal induction. The resulting fabric (DAC/ODA/Cotton) exhibited exceptional superhydrophobicity, with a water contact angle of 155° and an osmotic pressure of 426.2 mm. The uniform coverage of DAC/ODA on cotton fibers also ensured high air permeability (33.1 mm/s). Additionally, DAC/ODA/Cotton demonstrated outstanding antifouling performance against various common liquids and water can easily remove dust from its surface. Importantly, the fabric maintains its superhydrophobicity under extreme conditions such as high temperature, UV radiation, and acid-base exposure. Even after 100 abrasion cycles, no significant changes in surface morphology and color on DAC/ODA/Cotton were observed. This fluorine-free, environmentally friendly approach offers significant potential for developing multifunctional textiles and coatings with broad applications while reducing environmental impact.
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FUEL
·
2024
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IF 6.7
Yimin Xiong,Xuepeng Wang,Wei Deng,Peiyong Ma,Kai Xu,Jun Xu,Long Jiang,Yi Wang,Sheng Su,Jianlan Li,Song Hu,Jun Xiang
Biomass oxidative pyrolysis introduces restricted oxygen into the reaction zone, realizing autothermal pyrolysis to address the heat supply challenges inherent in large-scale applications. However, heavy components (＞200 Da) in bio-oil are critical precursors that lead to coke formation upon heating, which hinders the utilization of bio-oil. In this study, the conventional and oxidative pyrolysis experiments of cellulose, hemicellulose , and lignin in a fix-bed reactor were conducted at temperatures ranging from 300 °C to 800 °C, aiming to investigate the evolution of heavy components in bio-oil during biomass oxidative pyrolysis. The results showed that the addition of oxygen promoted the generation of bio-oil. Compared to conventional pyrolysis, the addition of oxygen mostly increased the yields of cellulose-oil, hemicellulose-oil, and lignin-oil by 28.21 %, 10.94 %, and 16.84 %, respectively. Further comprehensive analysis revealed that oxygen promoted the depolymerization of three components at a lower temperature range (＜ 500 °C). With increasing temperatures, oxygen enhanced the polymerization of volatiles from cellulose and lignin, where oxygen, acting as a binder, promoted the generation of phenolic compounds of heavy components in lignin-oil. Conversely, as the temperature increased, oxygen enhanced the oxidative decomposition of volatiles from hemicellulose, inhibiting the generation of heavy components in hemicellulose-oil. To sum up, this study presented a global evolution route of heavy components in bio-oil during oxidative pyrolysis of three components.
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CHEMICAL ENGINEERING JOURNAL
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2024
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IF 13.3
Shicheng Wang,Xiaolei Guo,Xu Zhang,Haifeng Lu,Haifeng Liu
Reactive drying is a promising method for optimizing the drying and comminution of biomass. This paper investigated the reactive drying mechanism and the mechanical properties of three major components of biomass: cellulose (CL), hemicellulose (HL), and lignin (LN). The results indicated that HL was most significantly affected by temperature, with weight loss observed in the following descending order: HL > LN > CL. Based on FTIR and 13 C NMR analyses, the chemical structure changes of these three components differed and the reactive drying mechanism was revealed. Specifically, the temperature range of 105–150 °C was primarily associated with dehydration reactions, while processes such as depolymerization of CL and HL as well as decarboxylation of LN occurred within the temperature range of 150–200 °C. The Young’s modulus at different temperatures was measured using AFM, revealing that the Young’s modulus changes were ranked as HL > CL > LN. The impact of reactive drying on Young’s modulus could be attributed to the breakage of molecular chains due to the depolymerization of HL and CL, in addition to the thermal movement of the molecular chains.
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CARBOHYDRATE POLYMERS
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2024
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IF 10.7
Juan Long,Zhiqiang Li,Tuhua Zhong
Surface functionalization of cellulose nanofibrils (CNF) is crucial for expanding their practical application. However, most functionalization processes are complicated and laborious. Herein, this work presents a facile surface engineering strategy to create a range of functionalized CNF via thiol-ene click reaction. Initially, clickable CNF was produced by grafting a compound with both carboxylate- and norbornene groups onto bamboo cellulose via norbornene-dicarboxylic anhydride esterification followed by homogenization. The introduction of negatively charged carboxylates facilitated nanofibrillation, resulting in CNF with a diameter of 3 nm and an aspect ratio of up to 600. The introduction of norbornenes enabled diverse functionalization of CNF through click reaction. Subsequently, hexadecanethiol successfully clicked with norbornene-grafting CNF, enhancing its hydrophobicity and dispersion in organic solvents. 7-mercapto-4-methyl coumarin was also able to click with norbornene-grafting CNF, yielding fluorescence-labeled CNF while maintaining excellent aqueous dispersibility. The fluorescence-labeled CNF was demonstrated to be utilized as an eco-friendly sensor for the detection of Fe 3+ ions. Additionally, it could be converted into fluorescent films or intelligent inks suitable for anti-counterfeiting purposes. This study demonstrates that the proposed surface engineering strategy provides an effective approach for producing clickable CNF and fabricating cellulosic materials with diverse functionalities that meet the demands of various applications.
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INDUSTRIAL CROPS AND PRODUCTS
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2024
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IF 5.6
Zihao Li,Zuozhu Yin,Wenbo Xiao,Yuhua Chen,Chenggang Yang,Yidan Luo,Zhen Hong,Mingshan Xue
Given the increasing contamination of freshwater supplies, it is essential to effectively treat industrial wastewater. However, treating industrial wastewater using a single method is challenging due to the presence of complex contaminants like petroleum, organic dyes, bacteria, and other complex contaminants. In this study, we present a straightforward and scalable approach to prepare multifunctional nanocellulose-based membranes (NM) that exhibit superhydrophobicity, self-cleaning, oil/water separation, photocatalysis, and anti-bioadhesion properties. To begin with, we created NM by extruding fiber slurry onto a stencil and drying it. Next, we built a polyurethane (PU)/ZIF‐8/1H, 1H, 2H, 2H‐perfluorooctyltriethoxysilane (POTS)-based superhydrophobic layer by spraying it over the NM's surface. By employing the aforementioned processes, we successfully integrated multiple functions into a single superhydrophobic NM. Our results demonstrate that the NM-PU/ZIF-8/POTS membrane exhibits superior hydrophobicity performance, with a high-water contact angle (166.8 ± 0.8°) and a low rolling angle (5 ± 0.3°). Moreover, these samples retain high-water contact angles and low rolling angles even in harsh environments such as acid and alkali solutions, high temperatures, abrasion resistance, UV aging resistance, bending and folding, tape peeling, and self-cleaning. The NM-PU/ZIF-8/POTS membrane also exhibits high and stable oil-water separation performance, with a separation efficiency of 94.6% and a relatively high separation flux (133.2 L·m −2 ·h −1 ). At the same time, the NM-PU/ZIF-8/POTS membrane exhibits water-in-oil emulsion separation ability. The membrane’s stability, effectiveness, and reusability were demonstrated through ten repetitions of degradation experiments using aqueous methylene blue solution, with the NM-PU/ZIF-8/POTS membrane exhibiting an excellent degradation rate (>94%). Finally, the bioadhesion resistance test indicated a reduction of 69.1% in the adhesion rate of the NM-PU/ZIF-8/POTS membrane. Overall, the creation of the NM-PU/ZIF-8/POTS membrane serves as a useful inspiration for the practical application of superhydrophobic NM in multifunctional integration, while also broadening the scope of membrane applications.
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CARBOHYDRATE POLYMERS
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2024
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IF 10.7
Shihao Wang,Xiaoyu Cheng,Tao Ma,Shasha Wang,Shilong Yang,Wenyuan Zhu,Junlong Song,Jingquan Han,Yongcan Jin,Jiaqi Guo
Hydroxypropyl cellulose (HPC) is a sustainable cellulose derivative valued for its excellent biocompatibility and solubility and is widely used in various fields. Recent scientific research on high-substituted HPC mainly focused on its efficient preparation and phase transition behavior. Herein, a novel strategy of high-substituted HPC synthesis was demonstrated by employing DMSO/TBAF·3H 2 O as a cellulose solvent, exhibiting more efficiency than traditional approaches. High-substituted HPC prepared has remarkable thermal stability , exceptional hydrophilicity , and satisfactory solubility. Phase transition behavior of HPC with varying molar degrees of substitution (MS) was delved and a notable negative correlation between MS and cloud point temperature ( T CP ), was revealed, particularly evident at an MS of 12.3, where the T CP drops to 33 °C. Moreover, a unique self-assembly behavior featuring structural color and responsiveness to force in a solvent-free environment emerged when the MS exceeded 10.4. These insights comprehensively strengthen the understanding and knowledge of high-substituted HPC, simultaneously paving the way for further HPC investigation and exploitation.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2024
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IF 4.9
Danish Iqbal,Raza Ullah,Muhammad Ilyas Sarwar,Renhai Zhao,Xin Ning
A cotton linter-based source was used to form conjugate electrospun membranes composed of cuprammonium cellulose, polyethylene oxide, and polyacrylonitrile for the removal of the anionic and cationic dyes from aqueous media. The highest removal efficiencies of 94 %, 89.9 %, 87.4 % were achieved for the anionic dyes Congo red (CR), Metanil yellow (MY), and Methyl orange (MO), respectively, and less so on the cationic dyes Crystal violet (CV), and Rhodamine B (RB) were 55.8 % and 15.1 %, respectively. The pseudo-second-order model effectively described the adsorption kinetics for both types of dyes. The composite membrane exhibited adsorption behaviors following the Dubinin-Radushkevich (D-R) isothermal model. Thermodynamics study suggests that the adsorption process was spontaneous except for the RB dye. The activation energy values of CR, MY, MO, CV, and RB dyes were 27.65, 21.17, 11.50, 10.47, and 71.12 kJ/mol, respectively, confirming the physisorption phenomenon for CR, MY, MO, and CV dyes, while chemisorption occurs for RB dyes. This study investigates the potential of a conjugate electrospun membranes as a reusable adsorbent for dye removal. The effects of solution pH, temperature, and dye concentration on adsorption performance were systematically evaluated. The conjugate electrospun membrane efficiency declined by only 10 % after undergoing five adsorption/desorption cycles.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2025
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IF 8.5
Meng Zhou,Shuo Zhang,Xinya Zhang
The vast majority of conductive polymer composites (CPCs) currently available for electromagnetic interference (EMI) shielding rely on inorganic conductive fillers to construct conductive networks. However, the strategy inevitably causes some compromises in the biocompatibility, biodegradability, and mechanical properties of CPCs. In this work, the filler-free and high conductive cellulose nanofiber (CNF) composite papers containing poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) doped by lithium bis(trifloromethanesulfonyl) imide (Li-TFSI) are reported. The resultant Li-TFSI@PEDOT:PSS/CNF (LPPC) composite papers exhibit an exceptional absolute EMI shielding effectiveness of 14,525.5 dB∙cm −1 , surpassing the reported values of many CPCs-based EMI shielding materials containing inorganic fillers. Li-TFSI can induce the structural reorganization of PEDOT chains. The conductivity of Li-TFSI@PEDOT:PSS was boosted with the enhancement of the crystalline order and oxidation level of PEDOT chains. Furthermore, the obtained LPPC composite papers demonstrate outstanding mechanical properties with a tensile strength of 44.42 MPa and EMI shielding stability with a retention ratio of up to 97 %, which are desirable for EMI shielding in wearable devices. Therefore, this work provides a feasible strategy to construct filler-free CPCs-based EMI shielding materials, which are expected to provide electromagnetic protection for the next flexible devices.
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CELLULOSE
·
2025
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IF 4.8
He Wentao,Tan Lei,Wu Yongjia,Wei Yongchun,Chen Yiyang,Li Dan,Wang Guxia,Qian Yongqiang,Guo Shengwei
Cellulose is a bio-based material that has garnered increasing research interest due to its abundant reserves and excellent properties. However, its inherent flammability limits its widespread use. This study addresses this issue by combining cellulose with industrial waste fly ash (FA), not only mitigating its flammability but also transforming FA into a value-added product. Through hot pressing and freeze-drying processes, flame-retardant cellulose/FA films and foams were developed. This experimental method not only enhances the application potential of cellulose but also promotes the high-value reuse of FA, aligning with sustainable development principles. SEM images reveal good interaction between FA and cellulose. In terms of thermal performance, the maximum decomposition rates of C1-Fx and C2-Fx decreased systematically with increasing FA content. The addition of FA significantly improved flame retardancy, with the limiting oxygen index (LOI) of C1-F30 and C2-F30 reaching approximately 31% and 29%, respectively. Furthermore, the peak heat release rate of C2-Fx significantly decreased from 363.6 to 118.2 kW/m 2 , and the total heat release dropped from 7.3 to 4.1 MJ/m 2 . In summary, this study successfully utilized industrial waste FA to develop a bio-based flame-retardant material through a straightforward process, offering a viable solution to enhance the flame retardancy of cellulose and promote the reutilization of industrial waste.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2024
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IF 5.8
Lujie Wang,Hao Shen,Haodong Zhang,Dingfeng Xu,Jinping Zhou
Aerogels have been considered as a promising electromagnetic interference (EMI) shielding materials due to their lightweight, compressibility , high elasticity and electrical conductivity . In order to improve their EMI shielding effectiveness (EMI SE), developing carbon aerogel with adjustable microstructure is still an urgent problem. Herein, carbon aerogels were fabricated from bamboo cellulose nanofiber (CNF)/graphene oxide (GO) composites with the layered interconnected structure via bidirectional freezing and carbonization. The prepared aerogels exhibited high mechanical strength in the parallel lamellar direction and excellent compression flexibility in the vertical lamellar direction. After 300 cycles of compression in the vertical lamellar direction, 97% of its original height can be recovered. The absolute shielding effectiveness of anisotropic carbon aerogels could achieve 23,628 dB cm 2 g −1 with an ultralow density (3 mg cm −3 ). This study explores the correlation between the structure of carbon aerogels and their EMI shielding properties, offering an eco-friendly approach to produce lightweight anisotropic carbon aerogels for EMI shielding.
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