CARBOHYDRATE POLYMERS
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2022
·
IF 10.723
Weiguang Zhao,Shiyi Cao,Haoxin Cai,Yang Wu,Qi Pan,Heng Lin,Jun Fang,Yinyan He,Hongbing Deng,Zhihong Liu
Reconstruction of multilayered and functional smooth muscle tissues remains a challenge nowadays. Cryogels possess great advantages in three-dimensional tissue regeneration owing to the interconnected macroporous structure, but their applications have been hindered because of limited mechanical properties. Inspired by the natural extracellular matrix, cellulose acetate electrospun nanofibers (NFs) were incorporated to chitosan/silk fibroin (CS/SF) cryogel scaffolds to address this problem in this work. Compared with pure CS/SF scaffolds, CS/SF/NFs composite scaffolds showed roughened surface and enlarged pore size (216.2 ± 65.3 μm vs. 263.1 ± 75.7 μm) allowing for cell adhesion and proliferation. Incorporation of nanofibers upgraded the mechanical properties of scaffolds with a six-fold increase in compressive modulus. The proliferation and infiltration of smooth muscle cells (SMCs) were remarkably improved with the existence of nanofibers. Besides, SMCs cultured on CS/SF/NFs scaffolds displayed higher expression of contraction-related genes, verifying their potential for smooth muscle tissue engineering.
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高影响因子
NEW JOURNAL OF CHEMISTRY
·
2022
·Vol. 46
·期 36
·17358-17366
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IF 3.925
Xudong Zheng,Ang Li,Jie Hua,Yuzhe Zhang,Jian Rong,Jinfeng Mei,Man Zhou,Zhongyu Li
The vigorous development of rare earth elements has become particularly important for the recycling and reuse of rare earth waste solutions. We use the specific coordination of the phosphate group and La3+ to recover and separate La3+ from secondary resources. First of all, cellulose nanocrystals should be phosphorylated by using phosphoric acid in an aqueous medium. Phosphoric acid groups are introduced to the surface of the cellulose nanocrystal, and then poly-N-isopropylacrylamide is introduced for modification. The purpose is to increase the mechanical properties of the material. The material was characterized by scanning electron microscope, transmission electron microscope, Fourier infrared spectroscopy, N2 adsorption–desorption analysis, and thermogravimetric and static adsorption experiments. The results of the static adsorption experiments show that the maximum adsorption capacity is 92.28 mg g−1 when the pH is 7.0. After recycling the material five times, the material could still have 87.24% of the maximum adsorption capacity.
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COLLOIDS AND SURFACES B-BIOINTERFACES
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2022
·
IF 5.999
Yuanyue Shi,Xueke Cao,Zhaozhang Zhu,Jing Ren,Hao Wang,Baohua Kong
In this study, novel active materials based on cellulose acetate (CA) and gelatin (Gel) for the release of eugenol (Eg) were developed by fabricating CA/Gel-Eg core–shell structured nanofiber films using the coaxial electrospinning technique. These electrospun nanofibers were coated with a CA shell, which has excellent water stability. Eg was encapsulated on the core part of the Gel. CA/Gel-Eg fiber morphology, structure, thermal, surface wettability , mechanical, encapsulation efficiency, release profile, and biological activity were evaluated. Results showed that the Eg-loaded nanofibers had uniform fiber morphologies and average fiber diameters ranging from 302.5 to 166.6 nm. Eg could be efficiently encapsulated in nanofibers and released for 120 h. Additionally, the CA/Gel-Eg core–shell structured nanofiber films displayed good Eg dose-dependent antibacterial activity . These findings could lead to a new strategy for developing electrospun fibers with a core–shell structure for active food packaging applications.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2022
·
IF 5.518
Nitong Bu,Liying Huang,Guoyu Cao,Huanglong Lin,Jie Pang,Lin Wang,Ruojun Mu
Biopolymers , such as polysaccharides are increasingly concern in preparation of food packaging. However, those materials have weakness in properties of mechanics, hydrophobicity , and antibacterial, which limit their applications. In this work, we prepared emulsion (K-PL-CEOs) films with double network (DN) matrix by using konjac glucomannan (KGM) and Pullulan (PL), and incorporated with cellulose nanofibrils (CNF)-stabilized tea tree essential oil (TTEO) Pickering emulsions (CEOs). The effect of CEOs content on the structural and physicochemical properties of K-PL films was investigated. The results showed that CEOs were well dispersed in K-PL film forming matrix. The addition of CEOs could improve the thermal stability, UV-shielding, water resistance and mechanical properties of K-PL-CEOs films. Moreover, K-PL-CEOs films exhibited good antibacterial activity against E. coli and S. aureus . This paper demonstrated that K-PL-CEOs films can be potentially applied as food packaging.
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高影响因子
MICROCHEMICAL JOURNAL
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2022
·
IF 5.304
Siyi Li,Die Gao,Jing Lin,Zeng Wen,Kailian Zhang,Zhining Xia,Dandan Wang
A double-network hydrogel was prepared with the chitosan-cellulose composite as the rigid network and polyacrylamide as the flexible network (abbreviated as CCP hydrogel). A deep eutectic solvent synthesized by choline chloride and malic acid was used as the assistant solvent to dissolve cellulose for preparation of the CCP hydrogel. The obtained CCP hydrogel was characterized by scanning electron microscopy, Fourier transform infrared spectroscopy, X-ray diffraction, thermal gravimetric analysis, and stress-strain test. The properties of the CCP hydrogel are obviously better than those of the single network hydrogel. The compressive strength of CCP hydrogel is 2.8 times that of the chitosan-cellulose single network hydrogel. The CCP hydrogel exhibits the favorable swelling performance (swelling ratio of 955 %–1377 %), water-locking ability (water retention value of 40 %), and stability in aqueous system. Moreover, the CCP hydrogel performs the excellent adsorption capacity, fast adsorption efficiency, and good selective towards tetracyclines. The effects of temperature and solution pH on the adsorption properties of CCP hydrogel were assessed. The Langmuir, Freundlich, pseudo-first-order, pseudo-second-order, and thermodynamic models were applied to explore the adsorption characteristics of CCP hydrogel. After multiple adsorption/desorption cycles, the CCP hydrogel still maintains 84.3 %–93.4 % of adsorption capacity. Finally, the CCP hydrogel combined with ultra-performance liquid chromatography-mass spectrometry were used to analyze tetracyclines in food samples. The tetracycline (0.14 μg/mL) and minocycline (0.080 μg/mL) in milk, tetracycline (0.082 μg/mL) and minocycline (0.089 μg/mL) in fish, and tetracycline (0.078 μg/mL) and demeclocycline (0.10 μg/mL) in chicken were detected by CCP-hydrogel method with a high accuracy (recoveries of 75.82 %–108.8 %). Furthermore, for comparison with the CCP-hydrogel method, the traditional precipitation method was also applied to detect the tetracyclines in foods. The CCP-hydrogel method possesses a higher accuracy than traditional method, and can more accurately and satisfactorily detect tetracyclines in foods.
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INDUSTRIAL CROPS AND PRODUCTS
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2022
·
IF 6.449
Yiqin Wang,Jie Lu,Siying Zhou,Jian Du,Yehan Tao,Yi Cheng,Haisong Wang
Much of the carbohydrate-rich reed sawdust (RS) produced from the reed pulping mills is burned or buried, causing a waste of resources. The aim of this work is to effectively bio-convert cellulose and hemicellulose of RS to L -lactic acid and xylo-oligosaccharide (XOS) after liquid hot water (LHW) pretreatment . The experiments were carried out via separation hydrolysis fermentation (SHF) and simultaneous saccharification fermentation (SSF) by optimizing the culture and fermentation conditions of a probiotics compound composed of a consortium of lactic acid bacteria . In the end, functional feed additives containing 69.33 wt% L -lactic acid and 26.82 wt% XOS can easily be obtained without additional handling by SSF configuration at 40 ℃ for 82 h with the initial fermentation pH 7.0. The conversion rate of glucose to L -lactic acid reached 72.33%. The bioconversion of available portion in RS into XOS and L -lactic acid paves a new way for high-value utilization of reed residue resources.
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高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2022
·
IF 8.025
Xue Shi,Xiaoli Qin,Yunxiang Dai,Xiong Liu,Weifei Wang,Jinfeng Zhong
The catalytic activity of Candida antarctica lipase B (CALB) immobilized on modified cellulose nanocrystals (CNC) with different hydrophobicity was investigated using experimental and theoretical approaches. Firstly, the modified CNC were characterized by multi-spectroscopic methods, water contact angle, scanning electron microscopy and thermogravimetric analysis. Moderately hydrophobic CNC were found to be an optimal support for CALB immobilization. Secondly, model systems contained a CALB molecule and different numbers of modified CNC molecules ( [email protected] , [email protected] and [email protected] ) were prepared for molecular dynamics (MD) simulation. Root-mean-square fluctuation values (0.61–2.61 Å) of lid region were relatively high in [email protected] , indicating that modified CNC with moderate hydrophobicity favored forming a lid-open conformation of CALB. Finally, the esterification of oleic acid catalyzed by the immobilized CALB showed higher conversion (54.68 %) than free CALB (12.98 %). Insights into modified CNC with tunable properties provided by this study may be a potential support for improving the catalytic performance of lipases.
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PubMed
高影响因子
CELLULOSE
·
2022
·Vol. 29
·期 11
·6123-6141
·
IF 6.123
Tang Lu,Huang Huihua
In this study, in order to minimize the degradation of curcumin, Pickering emulsion with embedded curcumin (PCNCs/EGCG-Cur) was prepared and stabilized by pineapple peel cellulose nanocrystals (PCNCs) and ( −)-Epigallocatechin-3-gallate (EGCG). The effect of EGCG on the stability and bioaccessibility of the embedded curcumin in Pickering emulsion was assessed. FTIR, XRD and zeta-potential analysis proved the construction of PCNCs/EGCG structure and CLSM showed typical oil-in-water system of PCNCs/EGCG-Cur. Furthermore, the addition of EGCG affected contact angles of the oil–water interface. 30-day storage period showed that the retained curcumin was about 70.35 ± 1.06% in PCNCs/EGCG(0.04%)-Cur, while the retention rate was 47.15 ± 0.98% in the control. PCNCs/EGCG(0.04%)-Cur was the most stable under the conditions of thermal and ultraviolet light treatments with the maximum retention rates of curcumin were 92.20 ± 1.05% and 93.56 ± 1.37%, respectively. Moreover, EGCG was found to improve the antioxidant activity of the prepared emulsions. Simulated digestion exhibited PCNCs/EGCG(0.04%)-Cur could improve the bioaccessibility of both EGCG (24.99 ± 3.29%) and curcumin (35.97 ± 1.26%). These results are conducive to the further application of EGCG in the emulsified food stabilized with cellulose nanocrystals.
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CELLULOSE
·
2022
·Vol. 29
·期 16
·8919-8935
·
IF 6.123
Fan Shuang,Chang Wei,Fei Cheng,Zhang Zhongguo,Hou Bingbing,Shi Zhuxuan,Wang Huixin,Hui Yuchen
A wearable self-powered biosensor, fabricated from a stretchable and bendable textile matrix, senses glucose in urine. This textile matrix is made of cellulose fibers. A porous three-dimensional electrode with high flexibility, conductivity, and electroactive surface area is obtained by coating multi-wall carbon nanotubes and reduced graphene oxides onto a textile matrix based on cellulose fibers. After immobilizing glucose oxidase and laccase by the polymer embed method, the bioelectrodes show good enzymatic loading density and high electrocatalytic efficiency. The relative self-powered biosensor has a good linear response to glucose in the concentration range from 0 to 40 mM (R 2 = 0.995), with a satisfactory limit of detection at 3.95 mM, owing to the high electrocatalytic efficiency of the bioelectrodes. The biosensors have good selectivity, repeatability, and long-term storage stability, exhibit excellent stretching and bending performance, and show stability to a variety of pH, because of the catalytic specificity and tolerance of enzymes, the reasonable design of the biosensor, and the stable catalytic microenvironment. The recovery of the biosensor integrated with a diaper for glucose in artificial urine samples is between 95.6 and 105.9%, suggesting a promising determination for real samples. Graphical abstract
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BioEnergy Research
·
2022
·Vol. 16
·期 2
·1108-1120
·
IF 3.852
Xie Ruosong,He Weiwei,Qu Guangfei,Wu HuanHuan,Li Ziying,Li Junyan,Li Weijie
The application of biomass pyrolysis was still limited owing to the high pyrolysis temperature and the complicacy of pyrolysis products. In this work, a homogeneous low-temperature cellulose catalytic pyrolysis system is proposed to directional products 5-methylfurfural. The low-temperature catalytic activity and products distribution of cellulose pyrolysis in [bmim][FeCl 4 ] (Fe-IL) and [bmim] 2 CoCl 4 (Co-IL) at temperature gradients from 150 to 300 °C were studied. As the results, both Fe-IL and Co-IL can catalyze the pyrolysis of cellulose, especially for Fe-IL, which effectively reduced the pyrolysis temperature of cellulose to 200 °C. Nano-scale and micron-scale particles were produced by the catalysis of Fe-IL and Co-IL, respectively. Fe-IL have a high selectivity for the production 5-methylfurfural (5-MF) and furfural (FF), which were 71.12% and 19.14% respectively at the pyrolysis temperature of 200 °C. Furthermore, the mechanism of low-temperature catalytic pyrolysis and the directional evolution mechanism of 5-MF and FF were suggested. Graphical abstract
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CARBOHYDRATE POLYMERS
·
2022
·
IF 10.723
Chun-yan Hu,Lan Bai,Fei Song,Yu-liang Wang,Yu-zhong Wang
Due to the serious threat of methanol to human health, the convenient, quick and specific detection of methanol is of great importance. Therefore, in this study, a biomass-derived chiral nematic composite film is fabricated by the co-evaporation of cellulose nanocrystals (CNC) and water-soluble polymer of β-cyclodextrin (PCD). The freestanding iridescent CNC-PCD film shows distinguishing structural colors of red and yellow green for methanol and ethanol respectively, realizing the identification of the two homologous alcohols by naked eyes. Besides, the quick, reversible and quantitative colorimetric sensing of the CNC-PCD film to methanol is verified. As its structural color and maximum reflection wavelength redshift to the greatest extent for methanol than other alcohols, the CNC-PCD film exhibits the specificity and selectivity for methanol detection in both single and mixed solvents. Such less-consumed and easy-to-handle CNC-PCD film may be useful as a colorimetric sensor to detect or discriminate methanol in some industrial products.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2022
·Vol. 139
·期 33
·e52810
·
IF 3.057
Zhirong Hu,Jiayu Miu,Xiong-Fei Zhang,Mingmin Jia,Jianfeng Yao
UiO-66-NH 2 (Zr-based metal organic framework) is integrated into cellulose acetate (CA) to fabricate mixed matrix membranes (MMMs) through solvent-casting approach. To regulate the interfacial compatibility and suppress the non-selective voids, UiO-66-NH 2 with different particle sizes are investigated. The introduction of UiO-66-NH 2 provides additional pathways for gas molecules and renders the membrane with high CO 2 affinity, substantially augmenting the separation efficiency of UiO-66-NH 2 @CA composite membrane. By optimizing the particle size of UiO-66-NH 2 , the non-selective voids and the particle agglomeration can be effectively restricted. The optimum separation performance is obtained by U-100@CA membrane (UiO-66-NH 2 : 200 nm in size), exhibiting a CO 2 permeability of 168.8 Barrer with CO 2 /N 2 and CO 2 /CH 4 ideal selectivities of 40.2 and 51.3, respectively. The separation mechanism is ascribed to the presence of sufficient amine groups, the high CO 2 solubility of CA matrix, and superior inorganic–organic interfacial property.
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