FUEL
·
2019
·
IF 5.128
Xiaowei Bai,Jian Li,Chenxi Jia,Jingai Shao,Qing Yang,Yingquan Chen,Haiping Yang,Xianhua Wang,Hanping Chen
In this study, a new-type of Na/Fe solid acid catalyst was synthesized to achieve efficient conversion of cellulose into furfural. The influence of Na/Fe mass ratios (0.05–2%), pyrolysis temperature (350–750 °C), and catalyst to cellulose ratio (0.2:1–20:1) was investigated through pyrolysis–gas chromatography/mass spectrometry (Py-GC/MS), and the structure of Na/Fe catalyst was characterized with various approaches. Through scanning electron microscopy (SEM), the morphologies of the catalysts were found to exhibit rod-like, prismatic, spherical, and amorphous shapes with increasing Na/Fe. The results indicated that the selectivity of furfural increased with increasing Na/Fe ratio, and reached the highest value (61.4%) at a Na/Fe ratio of 1.42, after which it decreased with further increases in the Na/Fe ratio. Higher temperature and higher catalyst to biomass ratio are favorable for furfural formation, but exceedingly high temperature and catalyst to biomass ratio inhibit its formation. The maximum furfural yield could be achieved at 550 °C and catalyst to cellulose ratio of 10. The proposed catalytic pathway of cellulose pyrolysis for furfural is the promotion of the conversion of glucose monomers into dehydrated sugars such as LGO and DGP, which undergo secondary cracking to form furfural.
✓ 已验证
DOI
高影响因子
CELLULOSE
·
2018
·Vol. 26
·期 2
·1157-1167
·
IF 3.809
Tang Lirong,Hong Biyun,Li Tao,Huang Biao
Bilayer films were fabricated based on natural-based and biocompatible polymers such as esterified cellulose nanocrystals (ECNCs) and shellac, aiming for use in buccal drug delivery. Baicalin was used as the model drug. The swelling properties, drug loading and mechanical properties of films were evaluated and further characterized for mucoadhesion and in vitro drug release properties. The film (F2) containing ECNCs 45%, shellac 25% and polyethylene glycol 30% shows the best properties for the development of the film formulation. The swelling capacity of films was in the range of 36.5 ± 4.1–279.2 ± 14.1%. In vitro drug release shows that anomalous transport behavior indicates that transport includes drug diffusion and polymer relaxation. For film F2, the tensile strength and adhesion strength reaches to the maximum value of 21.57 ± 0.83 MPa and 0.073 ± 0.004 N, respectively. The interfacial interactions between drug and film components were confirmed by FTIR and XRD.
✓ 已验证
DOI
高影响因子
Polymers
·
2021
·Vol. 13
·期 20
·3463
·
IF 4.329
Juntao Yan,Jinhong Liu,Ya Sun,Guangsen Song,Deng Ding,Guozhi Fan,Bo Chai,Chunlei Wang,Linbing Sun
Rice straw-derived cellulose (RSC) with purity of 92 wt.% was successfully extracted from rice straw by a novel and facile strategy, which integrated the C2H5OH/H2O autocatalytic process, dilute alkali treatment and H2O2bleaching process. Influencing factors of the cellulose extraction were systematically examined, such as ethanol concentration, alkali concentration, H2O2bleaching process and so on; the optimal extraction conditions of cellulose was determined. A series of rice straw-derived cellulose acetate (RSCA) with different degree of substitution (DS) were prepared by the acetylation reaction; the effects of Ac2O/cellulose ratio, reaction temperature and reaction time on the acetylation reaction were investigated. Results of FTIR and XRD analysis demonstrated that highly purified RSC and RSCA were prepared comparing with the commercial cellulose and cellulose acetate. Solubility analysis of RSCA with different DS indicated as-prepared RSCA with DS of 2.82 possessed the best solubleness, which was suitable for electrospinning. Moreover, the flexible RSCA fibrous membrane was easily fabricated by a facile electrospinning method. Our proposed method provided a strategy for realizing the high-value utilization of waste rice straw resource, as prepared RSC and RSCA can be used as chemical raw material, and electrospun RSCA fibrous membrane has various applications in medical materials, food packaging, water purification and so on.
✓ 已验证
DOI
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2022
·
IF 6.633
Yingying Wei,Qian Du,Yang Wang,Pengcheng Gao,Zhifei Wang,Yong Jiang
Membrane separation technology plays an important role in nanosize-based molecules separation. The two-dimensional mesoporous membranes have attracted considerable attention for nanosize-based molecules separation. In this work, unsupported mesoporous silica nanosheets (MSNS) were prepared by the growth of template at the water/n-hexane interface using surfactant of cetyl trimethyl ammonium bromide (CTAB) micelles as templates. During the preparation process, the surfactant CTAB was removed to obtain pure two-dimensional MSNS through be washed with ethanol, followed by freeze-drying. The two-dimensional MSNS had uniform nano-pores structure, ultra-thin thickness and high surface area. The pore diameter of MSNS could be controlled by changing the concentration of n-hexane (4–10 nm). By depositing 0.50 mg of MSNS on cellulose acetate (CA) membrane, the CA-MSNS membrane could be used to purify nanosize-based molecules (such as proteins). When the CA-MSNS membranes was used to filter cytochrome c (cyt c) solution and ovalbumin (OVA) solution respectively, 93.46% of cyt c and 47.27% of OVA could pass the CA-MSNS membranes. However, after four times of filtration, OVA molecules were almost completely blocked and cyt c with purity of 99% could be obtained. Moreover, 92.23% of OVA molecules could be recycled through the elution from the surface of CA-MSNS membranes. The results indicated that two-dimensional CA-MSNS membranes had great application potential in the purification of nanosize-based molecules.
✓ 已验证
DOI
高影响因子
JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
·
2016
·Vol. 92
·期 6
·1203-1210
·
IF 2.738
Fengli Wang,Guanglei Zhao,Xiongfei Lang,Junrong Li,Xiaofeng Li
BACKGROUND Long-chain cellulose esters can be used as packaging materials, film materials, biodegradable plastics and drug delivery agents. Chemical methods are commonly adopted for preparation of these esters using traditional chemical catalysts and organic solvents, which result in environmental and safety problems. RESULT A new enzymatic method was tested for synthesis of long-chain cellulose esters in mixed ionic liquids. The key reaction conditions, including mass ratio of ionic liquids, acylating agents, lipase/cellulose mass ratio, reaction temperature and substrate molar ratio, showed significant influences on enzymatic acylation. FT-IR and 1 H NMR spectra indicated the successful acylation of hydroxyl groups. SEM and XRD data showed significant changes in morphologies and crystallinity. The thermal properties of products were different from the original due to the disruption effect of ILs and the enzymatic acylation. CONCLUSION A facile one-step route is presented for synthesis of long-chain cellulose esters. The lipase-catalyzed synthesis is an ecofriendly and green approach for the modification of cellulose by replacing traditional chemical catalysts with enzymes and replacing organic solvents with ionic liquids. This biocatalytic approach may find its applications in preparation of potentially biodegradable materials for food, pharmaceutical and related industries. © 2016 Society of Chemical Industry
✓ 已验证
DOI
高影响因子
ACS Omega
·
2020
·
IF 2.87
Enmin Zong,Binlu Guo,Jiayao Yang,Chao Shi,Shengtao Jiang,Zhongqing Ma,Xiaohuan Liu
The design of a reusable film adsorbent with easy solid–liquid separation for the removal of phosphate is necessary and significant but remains hugely challenging. Herein, the hyperbranched polyethylenimine-functionalized ethyl cellulose (HPEI-EC) film was successfully synthesized by a one-step solution-casting method. The structure and elemental composition of the HPEI-EC film were characterized by Fourier transform-infrared spectroscopy, X-ray photoelectron spectroscopy, and scanning electron microscopy. The phosphate adsorption capacity of the HPEI-EC film was 15.53 mg g–1, which is 12 times higher than that of EC. Significantly, the elongation at break of the HPEI-EC film was 13.43%, which is higher than that of the EC film (8.9%), and the HPEI-EC film had a considerable tensile strength of 13.21 MPa. Such good mechanical properties of the HPEI-EC film bring about the advantage of the saturated HPEI-EC film, allowing it to be easily taken out using a pair of tweezers, which significantly reduces the operation time and saves the cost in the application process. Furthermore, the HPEI-EC film possessed good reusability, and 71.6% of the original adsorption capacity of phosphate was retained even after five cycles. Moreover, the electrostatic interaction between protonated the amine group (-NH3+) and the phosphate ion (PO43–) is mainly responsible for the adsorption process. This study presents a low-cost and reusable film adsorbent for the effective removal of phosphate from water and provides an easy solid–liquid separation method for use in the adsorption field.
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Huan Liu,Fuxin Yu,Junyao Wang,Jianlang Shu,Minghui Sun,Zhida Li,Tinggang Zhang,Yu Liu,Guozheng Zhang
This study utilized natural sorghum straw as raw material, leveraging its material advantages of high cellulose content, low lignin and hemicellulose content, and long-fiber structure. By forming a hydrogen-bonded cross-linked network with polyvinyl alcohol (PVA), a high-performance piezoresistive sensor was developed to enhance its sensitivity and stability. Experimental results demonstrate that the sensor exhibits a sensitivity of 0.9 kPa − 1 under low-pressure conditions, 0.45 kPa − 1 under medium-pressure conditions, and further increases to 0.85 kPa − 1 under high-pressure conditions. Experimental data confirm the sensor’s long-term stability and sensitivity across the 10–120 kPa pressure range, with a minimum detection limit of 4.9 Pa. After 10,000 cyclic tests, it maintains excellent repeatability under repeated loading conditions, with a response recovery time of 25–50 ms. Furthermore, manufacturing costs were significantly reduced, achieving total cost savings of 96 %. The sensor has been successfully applied in detecting signals such as human motion, electrocardiograms, and sound, as well as in monitoring signals from pressure sensor arrays, demonstrating reliable practical performance. In summary, the piezoresistive sensor utilizing natural sorghum straw cellulose as its core conductive structure provides an efficient, reliable, and low-cost solution for pressure signal detection, promising to advance technological progress in related fields.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Ji Qi,Xiaowen Xie,Shuangchao An,Tong Luo,Juan Yu,Jikai Zhao,Chunpeng Wang,Fuxiang Chu,Zenghui Cheng,Jifu Wang
Hydrophobic ionogels function as functional underwater materials, since their energy dissipation capability is crucial for ensuring structural stability. However, hydrogen bond-based energy dissipation mechanism is susceptible to water molecule interference, and conventional cellulose blend results in limited dissipative capacity. This study introduces a cellulose composite strategy to develop hydrophobic ionogel with a mitigated sea–island structure. Specifically, a novel composite interface was formed by incorporating alkylated cellulose with a high substitution degree (DS = 2.88) into the polymer matrix. The resulting structure enlarged the effective interfacial area, thereby strengthening interfacial friction and enhancing energy dissipation. Consequently, the hydrophobic ionogel exhibited ultrahigh adhesion, showing an interfacial toughness of 1.06 kJ/m 2 upon debonding from stainless steel. Remarkably, it retained a high interfacial toughness of 0.68 kJ/m 2 even for underwater adhesion. Furthermore, the ionogel demonstrated strong adhesion to substrates with different polarities, excellent reusability, remarkable acid/alkali resistance, and rapid wettability. Based on its excellent conductivity, it was used for underwater motion sensing, vital sign monitoring, and intelligent adhesion. These advances provide new insights for incorporating cellulose-mediated energy dissipation mechanisms in ionogels.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Shuanghui Liu,Zefeng Ge,Mingxun Zeng,Huiyan Zhang
Aldehydes and ketones are regarded as important precursors for hydrocarbon fuel production due to their structural stability and ease of hydrodeoxygenation. In this study, a composite metal catalyst was constructed using alumina as the matrix and Zr and Ce as the active components, which was applied to catalyze the rapid pyrolysis of cellulose for the preparation of aldehydes and ketones. The synergistic roles of metal elements and the transformation pathway of aldehydes and ketones were elucidated, along with the influence of process parameters on product distribution and catalyst structure on activity and coke formation. The results demonstrate that the bimetallic alumina-supported catalyst outperformed the single-metal counterpart, with Zr-Ce/α-Al 2 O 3 showing higher aldehyde and ketone selectivity than Zr-Ce/γ-Al 2 O 3 due to two additional acid sites. Under in-situ pyrolysis at 450 °C and a 1:3 feedstock-to-catalyst ratio, 76 % selectivity to aldehydes and ketones was achieved. ZrO 2 and CeO 2 regulated the acidic sites of alumina and provided lattice oxygen, while the alumina support, in turn, enhanced the catalytic activity of the active metals. The co-precipitated catalyst, with higher BET surface area and stronger acidity, enabled a lower dosage and exhibited greater CeO 2 reducibility. Furfural was identified as the main product of catalytic pyrolysis. Under limited acid sites, it could be converted to 2-methylfuran via hydrogenation or to butanone through ring-opening. Excessive acidity promoted its oxygen addition, leading to acetic acid, which was subsequently ketonized to acetone. In addition, FTIR of the spent catalyst revealed oxygen in coke deposits mainly existed as bound water.
✓ 已验证
产品关联
DOI
高影响因子
Advanced Healthcare Materials
·
2025
·
IF 9.6
Linying Yan,Masoumeh Kianfar,Yuqian Liu,Yang Huang,Huining Xiao,Farzad Seidi
The development of injectable hydrogel wound dressings with inherent antibacterial and antioxidant properties for treating full-thickness skin injuries represents one of the most promising solutions in clinical care. In this study, a series of injectable hydrogels with tunable gelation times is designed and prepared through the Diels-Alder (DA) reaction between diene-functionalized quaternary cellulose and maleimide-grafted quaternary chitosan. The high degree of substitution of diene and maleimide groups on these polysaccharides enables the formation of highly crosslinked hydrogels. By fine-tuning the structure of the dienes, the gelation time can be reduced to 4 min at 37 ° C. Both precursors and hydrogels showed strong antibacterial activity with killing efficacies >98% against E. coli and S. aureus . Meanwhile, the encapsulation of epigallocatechin gallate (EGCG, a green tea derivative) endowed the hydrogel with strong antioxidant performance. Moreover, the hydrogel exhibited good biocompatibility with 100% cell viability for NIH3T3 cells. In vivo wound healing assessment in a mouse full-thickness skin defect model revealed that the optimum hydrogel exhibited significant collagen deposition and vascularization, as well as remarkable regenerative wound healing performance, demonstrating its great potential as a bio-based wound dressing for improving wound healing.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Yu Zhao,Ziguang Wang,Yu Wang,Zien Cheng
Hydrogels are promising materials for flexible wearable electronics; however, they often encounter limitations in practical applications due to environmental instability and weak mechanical properties. This study developed a multifunctional composite hydrogel by integrating phytic acid (PA) and hydrophobic lauryl methacrylate (LMA) chains into a polyacrylamide (PAM) and carboxymethyl cellulose (CMC) network, resulting in a synergistic multi-dynamic cross-linked structure. The hydrogel exhibits remarkable tensile strength (1.06 MPa), high ionic conductivity (1.45 S/m), and excellent environmental tolerance, maintaining its flexibility and conductivity even at −20 °C. Additionally, it demonstrates significant anti-swelling properties, broad-spectrum antimicrobial activity, and outstanding cytocompatibility (cell viability >97 %). As a multifunctional sensor, it shows high sensitivity (GF = 2.13), a fast response time, and stable performance over more than 1000 cycles. This hydrogel sensor reliably monitors physiological signals such as electrocardiograms (ECG), electromyograms (EMG), and respiratory patterns, demonstrating particular promise in diagnosing sleep-related breathing abnormalities in patients with heart failure. This study provides a robust and versatile platform for next-generation wearable devices.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INDUSTRIAL CROPS AND PRODUCTS
·
2025
·
IF 6.2
Zongyao Wang,Bai Yi,Chao Yan,Guoqi Xu
To address the inadequate mechanical strength of conventional waterborne polyurethane (WPU) caused by hydrophilic group incorporation, alongside the agglomeration tendency of cellulose nanofibers (CNF) as reinforcing fillers, this study proposes a multiscale dynamic reinforcement strategy leveraging synergistic “metal coordination and multiple hydrogen bonding.” Fe 3+ chelated tannic acid (TA)-modified CNF (Fe 3+ /TA@CNF) was fabricated as an enhancer and incorporated with WPU via a solvent casting technique to produce modified CNF reinforced WPU elastomer composites (F x T 1 CWPU). Subsequently, composite conductive films (MXene/F x T 1 CWPU) were fabricated through MXene conductive coating. Systematic investigations were conducted on the effects of the molar ratio of Fe 3+ to TA on the microstructure, thermal stability, and mechanical properties of the F x T 1 CWPU films. Furthermore, the sensing properties of the MXene/F x T 1 CWPU films were evaluated. When the molar ratio of Fe 3+ to TA was set at 2:1, the composite film demonstrated exceptional mechanical, ultimate tensile strength (6.12 MPa) and toughness (18.67 MJ·m −3 ) increased by 652 % and 461 % compared to WPU. Subsequent cyclic tensile tests confirmed the excellent resilience and energy - dissipation capacity of the composite films. Notably, the Fe 3+ and TA coordination network gives the material excellent adhesion properties (1.23 MPa shear strength on wood surfaces). Moreover, the MXene/F x T 1 CWPU films reliably monitored human motion, showing their promise as flexible substrates for wearable electronics (The film achieved stable acquisition of electrical signals from continuous limb movements over a 15-second period and accurately identified the timing of each individual movement.). This work provides a new approach for the development of multifunctional polymer nanocomposites.
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）