INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2026
·
IF 8.7
Jia-Ying Chen,Bai-Chuan Lu,Bei Zhang,Xin-Xin Chen,Xiao-Hui Yao,Dong-Yang Zhang,Wei-Guo Zhao
There has been increasing public interest in physical and mental health in recent years, rendering high-performance flexible sensors a burgeoning research focus. However, currently available hydrogel sensors fail to achieve high stretchability, conductivity, and stability. In this study, polyacrylamide (PAM) served as the matrix, and a dual-cellulose hierarchical network (MCNF) was constructed using microfibrillated cellulose and TEMPO-oxidized cellulose nanofibers of differing dimensions through a photocuring method. MXene was then loaded onto this network to form an effective conductive path. This approach endowed the hydrogel with a new energy dissipation mechanism, enhancing its mechanical properties: tensile strength (116.86–277.84 kPa), strain (1923–2029%), and toughness (1.34–2.12 MJ m −3 ). Additionally, the electrical conductivity of the PCMH hydrogel can reach 4.55 S m −1 and still maintain 64% of its conductivity at −70 °C, demonstrating excellent freeze resistance. Finally, when used as a flexible sensor, it can stably and sensitively monitor the movement signals of various parts and joints of the human body, accurately identify different sounds, and expand the application of cellulose in multifunctional sensors, soft electronic devices, and skin patches.
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高影响因子
CARBOHYDRATE POLYMERS
·
2011
·Vol. 86
·期 4
·1760-1767
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IF 3.463
Wen Zhang,Shiyan Chen,Weili Hu,Bihui Zhou,Zhenhua Yang,Na Yin,Huaping Wang
Flexible magnetic membranes based on bacterial cellulose (BC) with amphiphobicity were prepared firstly by the in situ synthesis of the Fe 3 O 4 nanoparticles on the BC nanofibers and then the fluoroalkyl silane (FAS) modification. X-ray diffraction (XRD) patterns indicated the Fe 3 O 4 nanoparticles had a spinel structure and field emission scanning electron microscopy (FE-SEM) revealed the Fe 3 O 4 nanoparticles were homogeneously deposited on the BC nanofibers. FT-infrared (FTIR) spectra and energy-dispersive spectrum (EDS) demonstrated the presence of FAS. After FAS modification on the magnetic BC membrane prepared by the in situ synthesis of the Fe 3 O 4 nanoparticles, the surface wettability of BC membrane was converted from amphiphilicity to amphiphobicity. The fluorinated membrane with appropriate roughness showed the highest water contact angle (WCA) of 130° and oil contact angle (OCA) of 112°. Additionally, the magnetometric measurements revealed that the membranes exhibited the superparamagnetic behavior and can be magnetically actuated. Magnetically responsive BC membrane with hydrophobic and lipophobic surface would have potential applications in electronic actuators, magnetographic printing, information storage, electromagnetic shielding coating and anti-counterfeit.
研究领域:
材料科学
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纳米技术
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高分子科学
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磁性材料
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表面化学
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高影响因子
KOREAN JOURNAL OF CHEMICAL ENGINEERING
·
2019
·Vol. 36
·期 4
·513-521
·
IF 2.476
Cai Weijie,Chen Qing,Xuan Hao,Li Congming,Yu Hao,Cui Li,Yu Zhihui,Zhang Shaoyin,Qu Fengzuo
A sulfonated Sn-doped KIT-6 catalyst (Sn-KIT-6-Pr-SO 3 H) was successfully prepared via the hydrothermal self-assembly method, and its performance towards to value-added lactic acid production from one-pot conversion of renewable cellulose was investigated. Indeed, the physicochemical features of the as-prepared catalysts were deeply characterized by various techniques, including XRD, BET, SEM, FT-IR, XPS, UV-vis and TGA-DSC. The results confirmed its high BET surface area with an ultrahigh cross-linked framework and promising acid strength (co-existence of Brønsted and Lewis acidity). Additionally, the impact of different reaction factors, such as the type of catalysts, temperature, time, recyclability on cellulose conversion and the yield of targeted lactic acid, were determined. Meanwhile, the developed catalyst depicted the promising activity and stability under the optimal reaction conditions. It could be recycled at least four times without any obvious deactivation. This provides insight into developing efficient catalytic systems to convert renewable biomass into value-added chemicals.
研究领域:
催化化学
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生物质转化
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绿色化学
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材料科学
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可持续能源
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ACS Applied Nano Materials
·
2022
·
IF 6.14
Guang Liu,Kai Bi,Jingzhang Cai,Qigen Wang,Mi Yan,Chen Wu
Rapid development of wearable electronics stimulates the emergence of flexible electromagnetic (EM) wave absorbing materials with strong attenuation and wide bandwidth during deformation. Conventional EM wave absorbing materials are usually in the form of powders which are challenging to achieve satisfactory adhesion and/or dispersion in soft matrices. Here, uniform Fe3Co7 nanoparticles with large permeability have been electroless plated on a mixed cellulose membrane (MCM). The cross-linked cellulose endows the absorber with excellent flexibility and provides substantial heterogeneous nucleation sites for the Fe3Co7 nanoparticles in the formation of interconnected EM nanofilms, which give rise to enhanced polarization relaxation, conductive loss, eddy current effect, and ferromagnetic resonance. Optimal EM absorption with minimum reflection loss (RLmin) of −35.9 dB and ultrawide effective absorption bandwidth of 9.8 GHz has been achieved at a small thickness of 2.0 mm. Benefiting from the well-dispersed nanoparticles and stable adhesion onto the flexible substrate, the deformative Fe3Co7@MCM maintains effective absorption capacity during bending and compressing. This work not only clarifies synergistic attenuation mechanisms of flexible Fe3Co7@MCM in the natural and deformative states but also provides versatile strategy to construct flexible EM devices for extendable applications in catalysis, energy, and sensing.
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Journal of Water Process Engineering
·
2022
·
IF 7.34
Rong Cai,Yueyun Zhou,Jiawei Hu,Jiawei Lu,Xiaokun Fan,Ying Chen,Meng Ding,Jingjing Rong,Wenyong Liu,Yi Chen
A polysaccharides sodium alginate (SA)/cellulose nanofiber (CNF) composite hydrogel (S-Cx) was prepared for applying as a self-supported filtration membrane to solve the problem of membrane fouling . By using “cooking” method to deal with the SA solution and adding CNF in the synthesis process, the hydrogel membrane shows excellent mechanical properties. Through the pore-making and large pressure applying, the flux of S-Cx membrane could reach 71.5 Lm −2 h −1 , which is similar to some hydrophobic membranes. The excellent fouling resistance and long-term application ability were also found in the filtration. Moreover, its rich ionic groups such as carboxyl and hydroxyl groups endow the membrane with a strong ability to intercept the heavy metal ions and ionic dyes based on the differential mechanisms. All of the characteristics make it a potential filter membrane.
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高影响因子
MOLECULES
·
2022
·Vol. 27
·期 18
·6013
·
IF 4.927
Xinjiao Cui,Donghao Ye,Jiankun Wei,Xiaodi Du,Pengzhao Wang,Junsheng Li
Fragrances have been widely used in many customer products to improve the sensory quality and cover flavor defects. The key to the successful application of fragrance is to realize controlled fragrance release, which relies on the use of an appropriate carrier for fragrance. An ideal fragrance carrier helps to achieve the stable storage and controlled release of fragrance. In this work, a novel composite fragrance carrier with MIL-101 (Cr) as the fragrance host and cellulose acetate fiber (CAF) as the protective shell was developed. The encapsulation effect of MIL-101 (Cr) and the protective function of the CAF shell significantly improved the storage stability of L-menthol (LM). Only 5 wt % of LM was lost after 40 days of storage at room temperature. Encapsulated LM could also be effectively released upon heating due to the thermal responsiveness of CAF. In addition, the composite carrier was highly stable with neglectable Cr leaching under different conditions. The results of this work showed that the developed composite carrier could be a promising carrier for the thermally triggered release of fragrance.Keywords:composite materials;stable storage;controlled release;adsorption;L-menthol
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CARBOHYDRATE POLYMERS
·
2023
·
IF 11.2
Meng Zhang,Yaxuan Wang,Kun Liu,Yang Liu,Ting Xu,Haishun Du,Chuanling Si
Hydrogels with prominent flexibility, versatility, and high sensitivity play an important role in the design and fabrication of wearable sensors. In particular, these flexible conductive hydrogels exhibit elastic modulus that is highly compatible with human skin, demonstrating the great potential for flexible sensing. However, the preparation of high-performance hydrogel-based sensors that can restrain extreme cold conditions is still challenging. Herein, a novel anti-freezing composite hydrogel with superior conductivity based on polyacrylamide (PAM), LiCl , and PEDOT:PSS coated cellulose nanofibrils (PAM/PEDOT:PSS/CNF) is constructed. The addition of CNF increased the hydrogen bonding sites of the molecular chains in the micro, thus improving the mechanical strength and the conductivity of the hydrogel in the macro. The hydrogels achieve a high tensile strength of 0.19 MPa, compressive strength of 0.92 MPa, and dissipation energy of 41.9 kJ/m 3 . Otherwise, LiCl increases the interactions between the colloidal phase and water molecules, endowing the hydrogels with excellent freezing tolerance. Specifically, the optimized hydrogel of 45 % LiCl exhibited stable mechanical properties at −40 °C. Finally, the composite hydrogel was used to assemble flexible sensors with high sensitivity of 10.3 MPa −1 , which can detect a wide range of human movements and physiological activities.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2023
·
IF 8.2
Jingwen Wang,Xiaoshuai Han,Weijie Wu,Xiaoyi Wang,Linhu Ding,Yuli Wang,Shanshan Li,Jiapeng Hu,Weisen Yang,Chunmei Zhang,Shaohua Jiang
Wooden building materials have advantages in terms of biodegradability , non-toxicity, pollution-free and recycling. Currently, applications of natural wood are extremely limited because of low density, low strength and toughness. Therefore, we reported an effective modification strategy with nano-scale cellulose nanofibrils design to prepare a synergistically enhanced cellulosic material . Via three steps: i) the secondary alcohol hydroxyl groups in C 2 , C 3 position were cut; ii) oxidize the hydroxyl group at C 2 , C 3 position to achieve dialdehyde cellulose; and iii) oxidized again to obtain dicarboxylic cellulose. Subsequently, thanks to the regulation of the average moisture content, the moisture content in the wood surface and subsurface increased in a short time. The wood softening layer contributes to the hotpressing treatment of the wood. The mechanical properties and dimensionality have been greatly improved. The obtained delignified oxidated hot-pressed wood with 0.55 mmol/g carboxyl group content demonstrates excellent strength of 328.8 ± 7.43 MPa and Young's modulus of 8.1 ± 0.14 GPa, which is twice than that of natural wood. Delignified oxidated hot-pressed wood also shows exceptional toughness of 8.3 ± 0.28 MJ/m 3 . Other than that, the shore hardness indicates 0.55 mmol/g carboxylic group, which could increase the hardness at the wood surface hardness to 72.5 ± 4.29°.
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CARBOHYDRATE POLYMERS
·
2022
·
IF 10.723
Li Xia,Linlin Li,Yewen Xiao,Feng Xiao,Wei Ji,Shaotong Jiang,Hualin Wang
An intelligent bionic trilayer fibrous membrane is developed via electrospinning for the moisture-adjusting of a storage space. The trilayer is composed of a hydrophobic inner layer of cellulose acetate (CA), a super hygroscopic intermediate layer of gelatin (GA) and a hydrophilic outer layer of ethylene-vinyl alcohol copolymer (EVOH). The hierarchical pore networks of EVOH/GA/CA (∼2.45/∼4.5/∼36.0 μm) and the asymmetry wettability endow the membrane with outstanding directional water transport capacity. Specifically, the membrane has an excellent accumulative one-way transport index (1293 %), a remarkable overall moisture management capacity (0.91) and a reasonably high water evaporation rate (0.59 g h −1 ). The target membrane can regulate the relative humidity (RH) from 75 % to 50 % without extra energy consumption, which is capable of extending the shelf-life of jerk beef by ∼100 % under surrounding temperature of 25 °C and humidity of 75 % RH.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2023
·
IF 8.2
Cuiping Zhu,Wei Wang,Zijie Wu,Xiaochun Zhang,Zhuangzhuang Chu,Zhuohong Yang
Various methods have been used to cope with heavy metal ion contamination in wastewater, which caused serious hazards to ecological and human health. Adsorption is one of the most frequent, economical and effective methods for removing these contaminants. Herein, a porous and amino-rich cellulose-based composite adsorbent (PEI-PCS) with anisotropic property was successfully prepared by covalently cross-linking polyethyleneimine on delignified corn straw. Combined with the porosity of straw substrate and the chelating ability of amino group to metal ions, the as-prepared PEI-PCS exhibited universality (various metal ions), rapid adsorption behavior (within 180 min achieve adsorption equilibrium), high adsorption capacity (85.47 mg g −1 for Cu(II)), and good durability (70 % of adsorption efficiency after 5 cycles). In addition, the adsorption process was conformed to pseudo-second-order dynamics and the Langmuir isotherm models. Lastly, the adsorption mechanism was also elucidated. This study provides a sustainable pathway for the manufacture of efficient biomass-based adsorbents and confirms that functionalized corn straw is a promising material for the treatment of heavy metal ions.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2023
·
IF 8.2
Haibo Huang,Long Mao,Wei Wang,Zhihan Li,Chengrong Qin
As a traditionally used packaging material, natural cellulose-based paper has poor barrier properties to water and oxygen, which severely limits its wide application in food packaging. In this study, we report a new sustainable approach to producing hydrophobic, high-barrier, and antibacterial packaging materials from cellulose paper. In this process, commercially available microcrystalline cellulose was first modified by long-chain stearic acid to form hydrophobic microcrystalline cellulose ester and then mixed with stearic acid as filler in the subsequent surface coating of bagasse fibre paper. The microcrystalline cellulose ester/stearic acid-coated paper (MSP) exhibited good water repellency and oxygen barrier activity due to a continuous hydrophobic film that formed, which completely covered the pores of the original bagasse fibre paper. The coated MSP sample also showed excellent dimensional stability in water and a good wet tensile strength of 16 MPa. In addition, poly(hexamethylene guanidine) (PHMG) was chemically grafted onto the free carboxyl groups of the MSP surface layer, and the resulting MSP- g -PHMG samples exhibited excellent antibacterial activity against Escherichia coli and Listeria monocytogenes . The biodegradable cellulose-based MSP- g -PHMG sample significantly delayed the decay of raspberry during storage, indicating its potential application in food packaging.
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JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
·
2022
·
IF 5.895
Xinyi Xie,Canxin Li,Di Fan,Jian Zhong,Qiyu Liu,Xueqing Qiu,Xinping Ouyang
Traditional pretreatment of lignocellulose is usually conducted under higher acidic and high temperature conditions, which leads to both the degradation of sugar and the condensation of lignin, hindering the subsequent conversion. An effective approach to fractionate lignocellulose into 93.9% of noncondensed lignin, 99.4% of cellulose, 17.8% of xylose, and 66.7% of xylooligosaccharides under mild conditions was developed using the formic acid solution at 80 °C for 100 min. The β-O-4 bond content of lignin fractionated with formic acid (54.6 per 100 C9 units) was higher than dioxasolv lignin (48.4 per 100 C9 units), indicating that formic acid pretreatment well protected the ether bonds in lignin. Therefore, the hydrogenolysis of fractionated lignin contributed to 28.0% of aromatic monomer yield, which was comparable to dioxasolv lignin. As cellulose possesses a large amount of porosity because lignin was separated from lignocellulose, the hydrolysis of fractionated cellulose by molten salt hydrates gave a 96.4% of glucose yield.
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