CARBOHYDRATE POLYMERS
·
2019
·
IF 6.044
Ruiping Tong,Guangxue Chen,Junfei Tian,Minghui He
Developing green substrates based on cellulose to substitute synthetic plastics meet the requirement for the sustainable future. However, cellulose-based substrates supporting for building electronic devices are usually opaque and highly hydrophilic, which ultimately limits the performance of optoelectronic devices. Herein, we report a new avenue for fabrication of highly transparent, weakly hydrophilic and biodegradable cellulose film. The acquired cellulose film not only has high transparency (over 90%), but also displays weak hydrophilicity (∼79° of initial water-contact angle) and still remains 3.5 MPa of tensile strength after soaking for two days in deionized water. Additionally, the degradation half-life of cellulose film is 20 days, and the cellulose films also have better thermostability. Moreover, the flexible electroluminescent devices have been successfully constructed by using this cellulose film as a green substrate. This novel strategy will greatly enrich the applications of cellulose films for next generation green electronics.
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高影响因子
CELLULOSE
·
2022
·Vol. 30
·期 2
·801-813
·
IF 6.123
Wei Chunjie,Liu Gang,Xie Yujiao,Sun Zhongyuan,Liu Chang,Song Feng,Cui Hongyou
Molten salt hydrate (MSH) is a good solvent for cellulose dissolution and an effective catalyst for cellulose conversion. In this work, a series of MSH was evaluated in terms of cellulose dissolvability, regeneration performance, and catalytic activity in cellulose conversion into 5-hydroxymethylfurfural (HMF). ZnBr 2 ·3H 2 O–LiCl·3H 2 O showed good performance on cellulose dissolution and conversion. The effects of ZnBr 2 ·3H 2 O concentration, reaction temperature, and time on cellulose conversion into HMF in ZnBr 2 ·3H 2 O–LiCl·3H 2 O were optimized, and 48.7% HMF yield was reached at 60 wt.% ZnBr 2 ·3H 2 O. The species of ZnBr 2 ·3H 2 O–LiCl·3H 2 O were analyzed, and the function of species concentration was correlated with the product yield from the conversion of fructose. It was found that Br − and H + were the active species for fructose dehydration into HMF. ZnBr 3 − and H + catalyzed the conversion of fructose into furfural, which competed with the production of HMF. The reaction mechanism was proposed to understand the cooperate of species in MSH for cellulose conversion.
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高影响因子
CARBOHYDRATE POLYMERS
·
2022
·
IF 10.723
Mingchen Yang,Somia Yassin Hussain Abdalkarim,Hou-Yong Yu,Rabie A.M. Asad,Dan Ge,Ying Zhou
Thermo-sensitive composite microspheres (TPCP) were developed to achieve the on-demand release of drugs. The TPCP microspheres were synthesized using Oil-in-Water (O/W) emulsion evaporation technique and then impregnated with thermo-sensitive polyethylene glycol (PEG). The addition of cellulose nanocrystals (CNCs) significantly enhance thermal stability , crystallization ability, and surface hydrophilicity of TPCP microspheres due to heterogeneous nucleation effect and hydrogen bonding interaction, resulting in stable microsphere structure. The thermal degradation temperature ( T max ) increased by 13.8 °C, and the crystallinity improved by 20.9 % for 10 % TPCP. The thermo-sensitive composite microspheres showed the regulated cumulative release according to in vitro human physiological temperature changes. Besides, four release kinetics and possible release mechanism of TPCP microspheres were provided. Such thermo-responsive composite microspheres with control microsphere sizes and high encapsulation rate may have the potential to the development of on-demand and advanced controlled-release delivery systems.
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高影响因子
PROPELLANTS EXPLOSIVES PYROTECHNICS
·
2022
·Vol. 48
·期 2
·e202200186
·
IF 2.134
Xikai Duan,Zhaoqian Li,Bo Wu,Jinpeng Shen,Chonghua Pei
The industrial nitrification system of preparing nitrocellulose (NC) adopts nitric and sulfuric mixed acid, which generates a large amount of waste acid and by-products, and requires a laborious procedure for the stability treatment. In this study, a novel method was developed for the preparation of NC. NC with a nitrogen content of 12.62 % was prepared in 15 min by homogeneous esterification of cellulose based on [Bmim]Cl (1-butyl-3-methylimidazolium chloride). The samples were characterized by FT-IR, XRD, Raman, XPS, TG-DSC, GPC, SEM, and elemental analysis. In addition, the activation energy (Ea) was calculated according to the Kissinger method. The burning rate and chemical stability of samples were also tested. The results showed that the NC had 3D honeycomb structure with pores of 200–300 nm diameter, uniform distribution of nitrogen elements, nitrogen content of 12.62 %, and minimum polydispersity index (PDI) of 1.55. The heat of decomposition (Q dec ) released by the samples was increased by 141 J/g, the Ea decreased by 16.4 %, and the burning rate increased by 40.5 % when compared with commercially available NC 12.6% . The chemical stability was very well only after water cooking. Compared with the conventional method, this method doesn't use sulfuric acid, generates less waste acid, and doesn't produce by-products such as sulfate esters. The procedure of stability treatment was also very effortless. The costs could also be reduced by the recycling of ionic liquids.
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JOURNAL OF APPLIED POLYMER SCIENCE
·
2022
·Vol. 140
·期 2
·e53287
·
IF 3.057
Min Pan,Pengtao Wang,Zhe Xu,Yu Kuai
A new pathway to construct high-strength, ultrastretchable hydrogels based on tailored modified carboxymethyl cellulose (TMCMC)and hydrophobic association(HPA) system was investigated. TMCMC was prepared from degradation of carboxymethyl cellulose (CMC)/N,N′-methylene bisacrylamide (MBA) chemical cross-linked hydrogels. The residual double bonds of TMCMC, confirmed by 1 H-NMR and FTIR analysis, reacted with acrylamide in HPA to form TMCMC/HPA hydrogels, and the homogeneous and fine spatial network structure of TMCMC/HPA hydrogel could be observed by scanning electron microscopy. Rheological analysis revealed that the coexistence of physical and chemical crosslinking in TMCMC/HPA hydrogels. Further studies showed that TMCMC/HPA hydrogel with MBA content of 0.5 wt% has outstanding mechanical properties, and its fracture stress, elongation and tensile strength reach 1.17 MPa, 3717.05% and 15.68 MJ·m −3 , respectively. Moreover, the hydrogel displayed good swelling resistance and stable strain electrical signal response.
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高影响因子
ACS Sustainable Chemistry & Engineering
·
2022
·
IF 9.224
Liangliang Zhu,Ben Dang,Kairui Zhang,Jun Zhang,Mei Zheng,Ning Zhang,Guanben Du,Zhijun Chen,Rongbo Zheng
Bioplastics (BPs) prepared from lignocellulose are an excellent replacement for petrochemical-plastics (PCPs) due to their renewability and biodegradability. The presence of residual/added/regenerated lignin reduced the water sensitivity; however, these BPs possessed a deep color and low transmittance and were prone to photodegradation. Herein, we developed a UV- and water-insensitive, colorless, transparent, and sustainable wood-derived BP (W-BP) by pressing delignified wood (DW) with 0.21% lignin and abundant hydrophobic crystal plane (200) of cellulose. The DW was obtained by the pretreatment of the wood sample with NaOH/Na2SO3 followed by H2O2 steam conditioning. The abundant hydrophobic crystal plane (200) of cellulose in DW was demonstrated by a large ratio of the crystal plane (200) to (110), the presence of two-dimensional (2D) nanosheets of defibrated cellulose, and a low moisture uptake of 8.7% of the freeze-dried DW. The aged W-BP with a thickness of about 50 μm displayed good photostability with a ΔE* value of 2.3 and a transparency of 84% transmittance at 550 nm. Additionally, W-BP also possessed water stability with a wet tensile strength of 74 MPa and a low water uptake of 28.3%. These values exceeded those of lignocellulosic BPs and some commercial PCPs. The W-BP could replace transparent PCPs and provide indirectly experimental support to the lignin–cellulose interaction.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2023
·
IF 8.2
Qihang Peng,Tianxiang Jin,Chongshi Wang,Yong Qian
Phytic acid-modified carboxymethyl cellulose (CMC-PA) has been investigated as a promising adsorbent for the removal of uranium from aqueous solutions. The synthesis of CMC-PA involves the hydrogen bonding interaction between CMC and PA, resulting in the incorporation of PA groups onto the cellulose backbone. The hydrophilicity , reusability and adsorption capacity of the prepared CMC-PA hydrogel have improved with the increase of PA content. Moreover, the adsorption experiments were conducted by varying parameters such as pH, initial uranium concentration, and contact time. The results showed that CMC-PA exhibited excellent uranium adsorption performance, with a theoretical maximum adsorption capacity of 436 mg/g. In addition, the material exhibits excellent reusability, and the reusability improves with the increase of crosslinking density, indicating that the crosslinking structure of the polymer gel can effectively enhance the structural stability of the material. Furthermore, CMC-PA also exhibits high selective adsorption performance towards uranium ions in the presence of various competing ions. Its high adsorption capacity, reusability, and selectivity make it a promising candidate for high-performance uranium ion adsorbents.
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高影响因子
CARBOHYDRATE POLYMERS
·
2023
·
IF 11.2
Rongda Zhang,Zhixin Zhang,Ping Xu,Jinxin Xu,Yiyan Gao,Guanghui Gao
Although flexible double layer capacitors based on hydrogels overcome the drawbacks of commercial double layer capacitors such as low safety and non-deformability, it is still considered as attractive challenges to achieve high conductivity for hydrogel electrolytes as well as high operating voltages for hydrogel flexible supercapacitors . In this paper, ion migration channels were engineered by immobilizing positive and negative charges on polymer skeleton and dispersing cellulose nanofibers in the polymerized polyelectrolyte network, providing ultra-high ionic conductivity (103 mS cm −1 ). In addition, K 3 [Fe(CN) 6 ] was introduced through a soaking method, leading to redox reactions on the surface of carbon electrode during charging and discharging, supporting a relatively wide voltage window (1.8 V). Moreover, the specific capacitance at high current remained 55 % of the specific capacitance at low current, indicating excellent rate performance. In addition, the device displayed high cycling stability (80.05 % after 10,000 cycles). Notably, we successfully light up the red LED with only one device. Accordingly, this work provides a feasible design concept for the development of cellulose nanofibers (CNF) hydrogel-based solid-state electrolyte with high conductivity for flexible supercapacitors with wide potential window and high energy density.
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高影响因子
JOURNAL OF APPLIED ELECTROCHEMISTRY
·
2023
·
IF 2.9
Xia Zunbin,Zuo Wei,Li Haiying,Qiu Liewei,Mu Ruihua,Wang Qian,Liu Hongchen,Wang Huixin,Hui Yuchen
Herein, a self-powered lactate biosensor (SPLBs) was assembled to detect lactate in sweat based on flexible textile matrix enzymatic electrodes. A porous three-dimensional electrode with high flexibility and electrical conductivity was obtained by decorating composites of reduced graphene oxide and carboxylate multiwalled carbon nanotubes onto a cellulose fabric substrate. The excellent enzyme embedding method using a gel electrolyte showed a Michaelis–Menten constant of 1.46 mM, indicating the high enzymatic activity of lactate dehydrogenase. Moreover, the assembled (SPLBs) displayed a sensitivity of 3.16 µW mM −1 cm −2 with a linear range of 0–10 mM and a detection limit of 9.49 µM. Additionally, the biosensor has good tensile flexural stability, selectivity, and long-term stability. When integrated into clothing, the (SPLBs) recovered 91.5–102.3% of lactate from real sweat, with a relative standard deviation of less than 4.16%. This biosensor is promising for sensing lactate in human sweat. Graphical abstract
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高影响因子
CARBOHYDRATE POLYMERS
·
2018
·
IF 5.158
Lei Li,Feijun Wang,Ziqiang Shao,Jianxin Liu,Qiaoling Zhang,Weizhou Jiao
Magnetic fluorescent nanoparticles (MFNPs)-based protein immobilization systems were successfully synthesized via a layer-by-layer (LbL) assembly approach in an impinging stream-rotating packed bed, which adopted chitosan containing carbon dots (CDs)@Fe 3 O 4 nanoparticles (NPs) as a precursor, chitosan (CS) or carboxymethylcellulose (CMC) involving CDs as shells. To reveal the relationship between structure and efficiency of systems, the effect of self-assembly mode and layer number\was investigated to provide us insight into how to improve the design of MFNPs-based supports. Finally, an MFNPs-based protein immobilization system with excellent fluorescence and magnetic response, expanded specific surface area, and enhanced immobilization and release performance were obtained. Immobilization mechanism and kinetic studies were also conducted to reveal the rate-controlling step and the template affinity. Taken together, this study provides an effective strategy to synthesize bifunctional MFNPs and to adjust the performance, which aims for facilitating new possibilities for biomass-based nanomaterials used for protein immobilization.
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高影响因子
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
·
2023
·
IF 6.1
Shunyu Xiang,Xiaoyan Wang,Shiqi Peng,Xinke Kang,Jing Wang,Liyuan Peng,Xiaozhou Ma,Jin Huang,Xianchao Sun
The application of antiplant virus agents on leaf surfaces faces challenges due to their vulnerability to wear, instability, and limited duration, which in turn jeopardizes plant health and yield. In recent years, high-aspect-ratio nanomaterials have gained prominence as powerful carriers for disease treatment, thanks to their exceptional penetrability and precise drug delivery capabilities. Here, we synthesized a pH-responsive nanoimmune inducer (CNC-AMO) with strong leaf adhesion through a Schiff base reaction, achieved by grafting amino-oligosaccharides (AMOs) on the surface of aldehyde-based CNC (CNC–CHO). Fourier transform infrared spectrometry, zeta potential, X-ray photoelectron spectroscopy, X-ray diffraction, transmission electron microscopy, atomic force microscopy, scanning electron microscopy, thermogravimetric analysis, and elemental analysis were used to characterize the CNC-AMO. The CNC-AMO displayed the capability for pH-responsive AMO release, showcasing its potential for targeted and controlled delivery. When applied to plants, the CNC-AMO exhibited impressive anti-TMV efficacy during a weeklong observation period. Meanwhile, the CNC-AMO exhibited remarkable adhesion and scouring resistance on the surfaces of the plant leaves. We strongly believe that the synergy of environmentally friendly synthetic materials, efficient plant virus control, and streamlined scalability positions CNC-AMOs as a promising pesticide for plant virus therapy.
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高影响因子
BULLETIN OF MATERIALS SCIENCE
·
2023
·Vol. 46
·期 4
·1-9
·
IF 1.8
Liu Xinyu,Gan Junyuan,Huang Yun,Liu Jiapin,Pu Dandan,Li Xing,Wang Mingshan,Lin Yuanhua
A kind of gel polymer electrolyte (GPE) based on a matrix of hydroxyethyl cellulose (HEC) composite lignocellulose (LC) for lithium-ion batteries (LIBs) with relatively good performances is prepared. The composite membrane containing 5 wt% HEC possesses excellent comprehensive performances, including high electrolyte uptake of 425 wt% and favourable thermal properties. At room temperature, the ionic conductivity is 2.68 × 10 –3 S cm –1 . Moreover, the lithium-ion transference number is 0.5, the GPE exhibits an electrochemical stability window of 5.4 V and favourable compatibility with electrode and cycling performance.
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高影响因子
危险品化学品经营许可证（带存储）