PROGRESS IN ORGANIC COATINGS
·
2022
·
IF 6.206
Si Sun,Peng Xu,Qian-Ru Xiao,Xiao-Li Qiang,Xiao-Long Shi
Superhydrophobic cellulose-based products show tremendous potential applications in both industries and researches owing to their inherent biodegradability, non-toxicity, and cost-effectiveness. However, previous studies mainly focused on superhydrophobic cellulose bulk materials rather than universal cellulose powder. Though some methods have been proposed for preparing superhydrophobic cellulose powder, their fabricating processes involve plenty of high-toxic organic solvents . In this work, we proposed a facile one-step solvent-free method to prepare superhydrophobic cellulose powder. The modified cellulose powder shows not only superhydrophobicity but also reversible wettability . Moreover, the superhydrophobic cellulose shows immense UV resistance by enduring 60 h UV radiation. The superhydrophobic cellulose powder-coated cotton fabric could separate oil/water mixture with high efficiency and reusability. This work provides a green method to produce superhydrophobic cellulose powder which can be used as a raw material for sophisticated multifunctional material fabrication in future.
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DOI
高影响因子
CELLULOSE
·
2021
·Vol. 28
·期 7
·4025-4037
·
IF 5.044
Gao Xiaoru,Yu Yuxiu,He Qian,Li Haojie,Liu Yaodong
A sustainable natural polymer, cellulose, has been used as precursor for producing carbonaceous materials. Ionothermal carbonization (ITC) in ionic liquid (IL) could transform biomass into functional carbon materials at a relatively low temperature. In order to improve the ITC carbon yields and structures, the first raw transition metal chlorides were added into IL, 1-Butyl-3-methyl-imidazole chloride (BmimCl), and their catalyzing effects were compared. It is found that the catalyzing effects of transition metal chlorides are mainly correlated to their cation size. With the addition of 0.5wt% NiCl 2 (based on IL), a high carbon yield of 94wt% is obtained. Additionally, the bio-based carbonaceous materials exhibit a higher graphitization degree with the addition of metal chloride. Furthermore, the IL shows good cyclability, and the carbon yield remains to be higher than 80 wt% after 5 cycles.
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DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2019
·
IF 6.97
Chenggang Zhang,Yanan Yin,Quanling Yang,Zhuqun Shi,Guo-Hua Hu,Chuanxi Xiong
Regenerated cellulose/BaTiO3 nanocomposite films were fabricated by incorporation of BaTiO3 nanoparticle (BTNP) or BaTiO3 nanofiber (BTNF) in regenerated cellulose (RC) via simple blending in aqueous NaOH/urea solution. The results showed that a proper addition of BTNP or BTNF could improve the dielectric constant, breakdown strength, energy density of RC and reduce the dielectric loss simultaneously. Meanwhile, RC-BTNF composites exhibited better dielectric and mechanical properties than RC-BTNP. Especially, the RC-2BTNF composite film with 2 vol % BTNF exhibited an ultrahigh discharged energy density of 13.14 J/cm3 at a breakdown strength of 370 MV/m. Moreover, the discharged energy density of 9.45 J/cm3 at 300 MV/m of RC-2BTNF is the highest discharged energy density of reported polymer-based dielectric films at 300 MV/m (closed to actual electric field strength when film capacitors work). Therefore, these flexible cellulose-based dielectric materials are promising in the field of novel high-performance film dielectric capacitor.
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DOI
高影响因子
CELLULOSE
·
2016
·Vol. 23
·期 6
·3785-3797
·
IF 3.195
Zhu Wenjing,Liu Lin,Liao Qian,Chen Xuan,Qian Zhouqi,Shen Junyan,Liang Junlong,Yao Juming
Cationic hyperbranched polyethylenimine (hPEI) was covalently linked onto the backbone of cellulose molecules via forming Schiff base structure between the amino groups of hPEI and the aldehyde groups on the chemically oxidized cellulose surface. The functionalized hPEI-CE possessed available active sites, and its adsorption behavior to anionic dye congo red (CR) and cationic basic yellow 28 (BY28) in aqueous solution was investigated. The hPEI-CE interacted with the two dyes, exhibiting sharp response to solution pH and ionic strength. The adsorption process was well dominated by the pseudo-second-order kinetic model. And the hPEI-CE following the Langmuir isotherm model, had a maximum adsorption capacity of 2100 mg g −1 for CR and 1860 mg g −1 for BY28, respectively. Further, the adsorption performance of six dyes onto the hPEI-CE was studied, which showed high adsorption capacities for CR, BY28, brilliant blue 133 (BB133), and reactive red, but very low adsorption for cationic bright yellow 7GL (7GL) and eosin Y (EY). The different adsorption performances for different dyes indicated the selective adsorption of the hPEI-CE for dyes owing to their different distribution coefficient ( K ) defining as the partition of dyes between hPEI-CE and water. Based on the unique selective adsorption, the mixtures of dyes, such as BB133-CR, BB133-BY28, BB133-7GL, and CR-7GL, were separated successfully using hPEI-CE.
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DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2021
·
IF 8.198
Haifeng Jiang,Haipeng Liu,Baolin Liu,Yu Zhang,Shu Li,Jie Chen
This work studied the effect of cellulose–lignin interactions under potassium formate (HCOOK) and nickel formate (Ni(HCOO)2) on behavior and product distributions. The results indicated that the presence of HCOOK affected the whole thermal decomposition process, while the effect of Ni(HCOO)2 was mainly manifested before 339 °C. The interaction under the action of HCOOK favored the generation of carbonyl compounds, and the catalytic pyrolysis with Ni(HCOO)2 was better for formating phenols. The high peak intensities of CO and CH4 were achieved by adding nickel formate and potassium formate, respectively. It was obviously different from noncatalytic pyrolysis. The evolution of a char structure further revealed that different formate salts had different effects on the interactions. The statistical method according to the distribution of the liquid component confirmed that HCOOK had the strongest effect for reducing the cellulose–lignin interactions.
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DOI
高影响因子
INDUSTRIAL CROPS AND PRODUCTS
·
2023
·
IF 5.9
Wenchao Li,Bin Xu,Mingfang Xu,Yue Wu,Zhihua Liu,Bingzhi Li,Cheng Zhong,Shiru Jia
In this study, a novel mild and recyclable ethylenediamine (EDA) pretreatment method was developed. This pretreatment process efficiently eliminated lignin and facilitated the recovery of pretreatment reagents. Under optimized conditions at 70 °C, more than half of lignin was removed from the corn stover (CS). Consequently, the enzymatic hydrolysis of glucose and xylose achieved yields of 82.1% and 50.4%, respectively. Notably, the recovered EDA was efficiently reused and maintained comparable pretreatment efficiency even after five rounds of recovery. The pretreated CS was effectively used for bacterial cellulose fermentation without requiring additional detoxification steps. Furthermore, the analysis of EDA lignin (EL) revealed the presence of numerous amino groups introduced into the lignin structure. Subsequently, EL was used in the polyurethane (PU) foam preparation. The results revealed that EL-based PU foam featured higher compressive strength, density, thermal stability, and adsorption capacity for dyes and heavy metal ions compared with alkali lignin-based PU foam.
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DOI
高影响因子
CELLULOSE
·
2021
·Vol. 28
·期 12
·7877-7891
·
IF 5.044
Ma Jianhua,Pu Haihong,He Pengxin,Zhao Qiangli,Pan Shaoxue,Wang Yaowu,Wang Chen
Multifunctional fibers have attracted widespread attention due to applications in flexible smart wearable devices. However, simultaneously obtaining a strong and functional woven fiber is still a great challenge owing to the conflict between the properties mentioned above. Herein, mechanically strong and highly conductive cellulose/carbon nanotube (CNT) composite fibers were spun using an aqueous alkaline/urea solution. The microstructure as well as physical properties of the resulting fibers were characterized via scanning electron microscopy, infrared spectroscopy, mechanical and electrical measurement. We demonstrated that carboxylic CNTs can be well dispersed in alkali/urea aqueous systems which also dissolved cellulose well. The subsequent wet spinning process aligned the CNTs and cellulose molecules inside the regenerated composite fiber well, enhancing the interaction between these two components and endowing the composite fiber having a 20% CNT loading with an excellent mechanical strength of 185 MPa. Benefiting from the formation of conductive paths, the composite fiber with the diameter of about 50 μm possessed an electrical conductivity value in the range of 64–1274 S/m for 5–20 wt% CNT loading. This excellent mechanical strength and high electrical conductivity enable the composite fiber to exhibit a great potential in joule heating; the heating temperature of cellulose/CNT-20 fiber reached more than 55 °C within 15 s at 9 V. In addition, the multifunctional filaments are further manufactured as a water sensor to measure humidity. This work provides a potential material that can be applied in the fields of wearable electronics and smart flexible fabrics. Graphic abstract
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DOI
高影响因子
BIORESOURCE TECHNOLOGY
·
2019
·
IF 6.669
Lishi Yan,Ruoshui Ma,Huaixin Wei,Liangzhi Li,Bin Zou,Yiwen Xu
The production of 5-hydroxymethylfurfural (5-HMF) from cellulose catalyzed by a series of transition metal chlorides (i.e. FeCl 3 , RuCl 3 , VCl 3 , TiCl 3 , MoCl 3 and CrCl 3 ) was studied in biphasic system. RuCl 3 was the most efficient catalyst among these transition metal chlorides for 5-HMF production, and resulted in both the highest yield of 83.3% and selectivity of 87.5% in NaCl-aqueous/butanol biphasic system. XRD analysis and FTIR spectroscopy were applied to further characterize the RuCl 3 catalyzed cellulose slurries to reveal the catalytic reaction mechanism. Results demonstrated that RuCl 3 enhanced the decrystallization and cleavage of C O C bonds in cellulose, promoted the subsequent dehydration of glucose into 5-HMF, while suppressed the glucose retro -aldol reaction to byproduct lactic acid. In addition, with the assistance of NaCl-aqueous/butanol biphasic system, 5-HMF further degradation was limited and thusly maintained a desired 5-HMF yield. This proposed approach provides an efficient strategy for one-pot conversion of cellulose into 5-HMF.
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DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2016
·
IF 3.138
Xuewen Ni,Wenjie Chen,Man Xiao,Kao Wu,Ying Kuang,Harold Corke,Fatang Jiang
Konjac glucomannan (KGM)/ethyl cellulose (EC) could form a stable homogeneous emulsion with appropriate mixing formula. This study aimed to investigate the stable mechanism of KGM/EC emulsion at different mixing ratio through its rheological properties, and droplet size and morphology changes with up to 6 days storage time. Though emulsions samples with high KGM content had larger droplet size and worse uniformity at the fresh stage, they appeared to be more stable and droplets growth rate were slow during storage. Aggregation and morphology of droplets could be observed under confocal microscopy. Shear-thinning behavior were found in mixed emulsions, and mainly accredited to the KGM component. The effect of temperature on viscosities of the emulsions was well-described by Arrhenius equation. Increased KGM content led to larger storage modulus (G′) and loss modulus (G″), and the difference in cross-over point of G′ and G″ implied changes in microstructures of the emulsions.
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DOI
高影响因子
JOURNAL OF ADHESION SCIENCE AND TECHNOLOGY
·
2025
·
IF 3.7
Kaiqiang Liu,Wenli Tang,Lieqiang Luo,Guihai Li,Haiping Wang,Xingguo Zhang
In this study, cellulose nanofibres (CNFs) with different structures were prepared using ball-milling and 2,2,6,6-tetramethylpiperidine-1-oxyl-mediated (TEMPO) oxidation. Then, microcalorimeter, scanning electron microscope, electrical conductivity, and micro-CT were used to investigate the interaction mechanisms between the CNFs and cement slurry. The results showed that the combination of ball-milling and TEMPO oxidation produced CNFs with carboxyl functional groups. When the NaClO concentration was 2 mmol/g and oxidation time was 2 h, the carboxyl content on the surface of the nanofibres was 0.0856 mmol/g. Based on the hydration rate and electrical conductivity results, the carboxylated CNFs reduced the hydration rate of the cement slurry and delayed the exothermic peak by 0.5–2.3 h. The decrease rate of the electrical conductivity of the cement slurry during transition stage increased from 2.805 to 3.543–5.142 mS/(cm·h). The electrical conductivity of the solid–liquid two-phase cement slurry was mainly provided by the pore solution. The decrease in the electrical conductivity of the cement slurry during the transition stage could mainly be attributed to the formation of hydration products that changed the microstructure of the cement slurry from ‘dispersed particles’ to a ‘gel grid’ during the hydration acceleration stage, the porosity and pore connectivity of cement slurry are reduced. The zeta potential results indicate that CNF in the cement slurry provides a location for the nucleation and growth of early hydration products through adsorption and bridging effects, changes the microstructure of the cement slurry, and accelerates the transition from liquid to solid state.
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产品关联
DOI
高影响因子
Asia-Pacific Journal of Chemical Engineering
·
2025
·
IF 1.6
Nyoman Puspa Asri,Minarni Wartiningsih,Chintya Gunarto,Antonius Jimmy Widagdo,Yohannes Somawiharja,Yustia Wulandari Mirzayanti,Jia-Ming Chern,Suryadi Ismadji
A novel, efficient, and eco-friendly sustainable process has been developed for the extraction of cellulose nanofibers (CNF) from durian rinds. The method utilizes low-molecular-weight 2,2,6,6-tetramethylpiperidine-1-oxyl (TEMPO) as an oxidation agent, in conjunction with sonication treatment, resulting in a significant reduction of processing time and energy consumption compared to conventional techniques. Various delignification methods and sonication times were investigated. For delignification, a sodium hydroxide solution (10%, w/v) at a biomass-to-solvent ratio of 1:30 resulted in the highest cellulose content of 82.07% in cellulose durian rind powder. In addition, the yield of durian rind-based CNF from sonication treatment was found to be as high as 96.26%. The CNF exhibited exceptional characteristics, including a diameter ranging from 8 to 50 nm and a length of several micrometers. This sustainable and environmentally friendly approach demonstrates significant potential for the valorization of agricultural waste into high-performance nanocellulose materials, contributing to the advancement of sustainable materials and applications.
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产品关联
DOI
高影响因子
BIOMACROMOLECULES
·
2025
·
IF 5.4
Qi Dai,Jiayi Lv,Yanpeng Cheng,Sining Huang,Hao Li,Zhaolin Yang,Mengqi Zhu,Long Bai,Zhiguo Li,Yang Liu,Siqi Huan
The stabilization of phase change materials (PCMs) in high internal phase emulsions (HIPEs) remains particularly challenging due to their inherent properties, significantly hindering their application in functional materials. Here, we introduce a versatile strategy in which oppositely charged cellulose nanofibrils (CNF) and didodecyl dimethylammonium bromide (DDAB) cooperate to construct PCM-in-water high internal phase Pickering emulsions (HIPPEs). The stabilization mechanism relies on a dual barrier: (i) electrostatic adsorption of CNF/DDAB complexes at the oil–water interface forms a dense and reversible interfacial film; (ii) a percolating CNF network in the continuous phase suppresses droplet migration through steric hindrance and viscoelasticity. Consequently, the emulsions remain stable over 30 days at room temperature, these HIPPEs suit diverse oils (including difficult-to-stabilize liquid paraffin) with up to 92% internal-phase volume, serving as green templates/3D printing inks and expanding the fabrication window for programmable HIPPEs in latent-heat storage and thermal management.
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产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）