INTERNATIONAL JOURNAL OF FOOD SCIENCE AND TECHNOLOGY
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2021
·Vol. 56
·期 12
·6420-6430
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IF 3.713
Kangliang Sheng,Guanghui Zhang,Xiaowei Kong,Jingmin Wang,Wanmeng Mu,Yongzhong Wang
Summary Grape seed proanthocyanidin extract (GSPE) has health benefits. However, these phenolic compounds undergo degradation reactions and have undesirable sensorial characteristics. GSPE was encapsulated using sodium alginate (SA), SA-methyl cellulose (MC) and SA-hydroxypropyl methylcellulose (HPMC) for promoting controlled release, pH stability, temperature and storage period tolerance of GSPE. The microcapsules were characterised using scanning electron microscopy (SEM) and Fourier transform infra-red (FTIR) analysis. The SA-MC and SA-HPMC microcapsules appeared to have a more compact surface than SA-alone microcapsules. FTIR analysis indicated successful immobilisation of GSPE into the polymeric microcapsules. Moreover, the SA-MC and SA-HPMC microcapsules showed higher thermal stability. The microcapsules showed a relatively higher amount of released GSPE at a pH above six than at a lower pH. The SA-MC and SA-HPMC microcapsules could be used to retain more GSPE content in the gastric phase and to release it in the intestinal phase for possible absorption. Furthermore, after 28 days of storage at 25 °C, the GSPE retention rate of the microcapsules was still higher than 80%. GSPE encapsulated in SA-MC and SA-HPMC microcapsules results in lesser degradation and can be absorbed more effectively. This method has potential for the delivery of colon-specific materials while exhibiting a sustained-release characteristic.
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高影响因子
Journal of Water Process Engineering
·
2024
·
IF 6.3
Zaharaddeen N. Garba,Saadatu A. Hamza,Chavalit Ratanatamskul
In this study, a novel impregnation method was adopted by adding Cu 2+ to microcrystalline cellulose (MCC) powder, producing a composite material (Cu-MCC) that was used as a sorbent to treat water contaminated by crude oil. The produced Cu-MCC was examined using a variety of characterization techniques. With the application of central composite design (CCD) for testing the influenced parameters, the experimental and predicted oil sorption capacity (OSC) values were 10.61 and 9.86 mg/g, respectively at the optimal condition of initial concentration (120 mg/100 mL), sorbent dosage (80 mg) and reaction time of 78 mins. This indicates that the predicted values from the model agree closely with the experimental values, with only a small error of 0.75. The adsorption data were simulated using five different versions of the linearized Langmuir equations along with the Freundlich and Temkin adsorption isotherms. Langmuir-2, which denotes a monolayer sorption process best describes the equilibrium adsorption data giving maximum sorption capacity of 6.48 mg/g with pseudo-second order model as the best model for the kinetics data. The findings show that Cu-MCC is very promising as an effective material for cleaning up water contaminated from crude oil.
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ENERGY AND BUILDINGS
·
2024
·
IF 6.6
Ting-Hui Fan,Hao-Qiang Pang,Sheng-Nan Zhang,Guang Lei Yu,Xi Wu
Compared to commercial glass, transparent wood-based windows is provided with better thermal insulation performance, and more comparable solar transmittance. However, transparent wood cannot dynamically regulate solar light switching between summer and winter, and its insulation is worth improving but without a clear micron thermal mechanism model. Herein, a thermochromic and insulation transparent window composed of oriented cellulose attached by VO 2 nanoparticles was prepared, and its thermal conductivity model of micron cellulose, VO 2 nanoparticles, and PMMA polymer was established. The results show that the extinction coefficient of Cell-wall@VO 2 @PMMA is improved to 21.68 % when the VO 2 occurs phase change at near-infrared spectra. The optimal angle of cellulose for comprehensive insulation performance of blocking near-infrared and heat conduction equals 60°. Besides, the transparent wood sample demonstrates a low thermal conductivity of Cell-wall@VO 2 @PMMA, reaching to 0.175 W·m −1 ·K −1 , as well as reducing the temperature difference by 36.8 %. This paper provides a novelty heat transfer perspective for designing thermochromic transparent cellulose with excellent insulation performance in the future.
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ACS Sustainable Chemistry & Engineering
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2022
·
IF 9.224
Liqin Yao,Zheng Zhou,Zhao Zhang,Xiangxin Du,Qi-Long Zhang,Hui Yang
A combination of a triboelectric nanogenerator (TENG) and natural wood presents a sustainable approach toward a smart home due to the wood’s biodegradability, low cost, and abundant resource. Major challenges for achieving a cellulose-based TENG are the brittleness, low crystallinity, and low surface charge density. We demonstrated a facile method to process and modify natural wood to satisfy application requirements. The treated wood has both good flexibility and tensile mechanical properties. After pressing, its crystallinity also saw a big increase, with the figure almost tripled. A further surface modification was inspired by dyeing technology. The cellulose on the surface of wood was cationically modified by 3-chloro-2-hydroxypropyl trimethylammonium chloride (CHPTAC) via the solution-immersion method. After modification, the surface potential increased two times compared to that of the unmodified one. Density functional theory was used to calculate the absorption energy between cellulose molecules and CHPTAC to further verify the feasibility of the chemical modification. Larger differences between the two tribo-layers in terms of the energy level produce a high electrostatic charge flow. The modified pressed wood-based TENG can generate a peak current of 9.74 μA, a voltage of 335 V, and a transferred charge density of 71.45 μC/m2 through contact electrification. A concept of a self-powered and sensing smart floor integrated with this modified cellulose-based TENG was further developed to provide real-time motion monitoring for a smart home. This work not only removes the wood brittleness but also puts forward a novel method to improve the wood surface charge density from an interdisciplinary perspective, which is crucial to facilitate the application of natural wood in the nanogenerator area.
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CARBOHYDRATE POLYMERS
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2018
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IF 5.158
Xiang Li,Qinqin Xu,Hongwei Shen,Yuanlong Guo,Mouyi Wu,Ya Peng,Lihua Zhang,Zongbao Kent Zhao,Yu Liu,Haibo Xie
To overcome the natural recalcitrance of cellulose for glucose production in aqueous media catalyzed by enzyme, in this study, a dissolution pretreatment strategy was developed by using in situ formed CO 2 -based reversible ionic compounds (RICs)/DMSO mixed organic electrolytes under mild conditions. The influences of the constitution of RICs, CO 2 pressure, dissolution pretreatment time on the physic-chemical structure of cellulose were investigated systematically by FTIR, XRD, SEM, AFM towards in-depth understanding of the correlations between the pretreatment conditions, micro-scale structure and enzymatic saccharification of cellulose. The results showed that the tetramethyl guanidine (TMG) based RICs solvent system [TMGH] 2 + [O 2 COCH 2 CH 2 OCO 2 ] 2− /DMSO (X RICs = 0.1, X RICs : the mole fraction of the formed RICs in the mixture) presented the best performance, which was evidenced by 100% glucose yield after the dissolution-regeneration pretreatment strategy under mild conditions (T = 60 °C, Pco 2 = 2.0 MPa, t = 2 h). Furthermore, the solvent system have good recyclability and usability.
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高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2019
·
IF 5.04
Jin Li,Qin Wang,Lei Zheng,Hongbo Liu
A novel graphene aerogel has been synthesized from cellulose by an easy way through sol-gel reaction and carbonization . In this route, it can be found the products have a high yield about 48 % and form a specific porous networks assembled by graphene flake. The product sample like CGA-2, characteristic of a specific area about 1426.11 m 2 /g and total pore volume about 1.02 cm 3 /g, exhibits a remarkable performance for removing cationic dye like methylene blue (MB) in water. Of which the maximal MB adsorption capacity can be found about 610.85 mg/g in a neutral solution and 1.2 g/g in a basic solution. Under the condition of initial MB concentration of 100 mg/L and pH of 7.0, the adsorption equilibrium can be achieved on CGA-2 in 10 min, with MB removal ratio about 99 %. In the MB adsorption on CGA-2, the isotherm fits Langmuir model with correlation coefficient of 0.9905, and the kinetics follows pseudo-second-order model with correlation coefficient of 0.9999.
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高影响因子
APPLIED CLAY SCIENCE
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2020
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IF 4.605
Haiyan Yang,Dongshen Tong,Yuxiao Dong,Laibin Ren,Kai Fang,Chunhui Zhou,Weihua Yu
Kaolinite , a natural, abundant, low cost, and eco-friendly material, has been widely used as filler, additives, adsorbent and coatings. In the study, kaolinite was evaluated for the performance of the hydrolysis of cellulose in water. The effects of mass ratio, reaction temperature, reaction time and water amount were investigated in a batch reactor. The fresh and regenerated catalysts were characterized by XRD , FT-IR and TG-DTG. The catalytic results showed that the highest TRS yield of 38.8% was obtained on the kaolinite at 200 °C with the mass ratio of catalyst to cellulose of 0.2 for 3 h. Moreover, kaolinite was a stable catalyst after regeneration and the yield of TRS decreased from 38.8% to 38.1% after five times reuse. Kaolinite contains abundant surface Al-OH groups, and the high TRS yield for kaolinite should be attributed to the H + ions released from the surface OH groups. This work provides a promising strategy for efficient cellulose hydrolysis into fine chemicals by natural clay minerals.
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高影响因子
FOOD CHEMISTRY
·
2021
·
IF 7.514
Qi Li,Yuehan Wu,Mohd Shabbir,Ying Pei,Hongshan Liang,Jing Li,Yijie Chen,Yan Li,Bin Li,Xiaogang Luo,Shilin Liu
O/W Pickering emulsions containing oil phase with different volume fractions (50–75 v%) were facilely prepared by using bacterial cellulose nanofibrils (BCNFs) alone. The effect of oil phase volume, storage time on the surface coverage, and coalescence rate of the Pickering-MIPEs and HIPEs (medium internal phase emulsions/high internal phase emulsions) were investigated. The Pickering-MIPEs/HIPEs exhibited excellent physical stability and low coalescence rate with droplet size varying from 32 to 91 μm. The increasing of particle contents could obviously decrease the droplet size and enhance the stability of the emulsions by strengthening the network structure and increasing the steric hindrance. The result of rheology analysis confirmed the formation of a three-dimensional network, endowing the exceptional stability of the emulsions. The emulsions revealed superb stability against a wide temperature (4–50 °C) range and salt condition (0–100 mM). This novel eco-friendly Pickering-MIPEs and HIPEs would provide great opportunities for their effective utilization in green-labelled food industry.
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高影响因子
CARBOHYDRATE POLYMERS
·
2022
·
IF 10.723
Liwei Qian,Yuxuan Yang,Tiantian Xu,Sufeng Zhang,Valentin Nica,Ruihua Tang,Wenqi Song
The acquisition of efficient protein isolation substances is vital for proteomic research, whereas it's still challenging nowadays. Herein, an elaborately designed protein imprinted material based on a bacterial cellulose@ZIF-67 composite carrier (BC@ZIF-67) is proposed for the first time. In particular, due to the ultrafine fiber diameter and abundant hydroxyl functional groups of the bacterial cellulose, BC@ZIF-67 presented a compact arrangement structure similar to a pearl necklace, which greatly promoted template immobilization and mass transfer resistance in protein imprinting technology. Therefore, the protein-imprinted material (BC@ZIF-67@MIPs) fabricated by surface imprinting technology and template immobilization strategy could exhibit ultrahigh adsorption capacity (1017.0 mg g −1 ), excellent recognition ( IF = 5.98) and rapid adsorption equilibrium time (50 min). In addition, based on the experiment outcomes, our team employed BC@ZIF-67@MIPs to enrich template protein in blended protein solutions and biosamples, identifying them as underlying candidates for isolating and purifying proteins.
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高影响因子
JOURNAL OF POLYMERS AND THE ENVIRONMENT
·
2021
·Vol. 30
·期 4
·1344-1354
·
IF 3.667
Shen Jian,Jiang Fangyuan,Wang Nan,Ouyang Xiao–kun,Jin Mi-cong
Surface modification of cellulose nanocrystals (CNC) is essential for improving their reactivity and adsorption capacity. Oxidation, as a conventional modification method of CNC, has strong reaction conditions, which may partially destroy the structure of CNCs. Herein, we propose a mild cellulose modification method, in which diethylenetriaminepentaacetic acid (DPTA) was grafted onto CNC with an aminosilane coupling agent. To facilitate the enrichment and recovery of adsorbents, we prepared magnetic CNC before grafting DPTA, and finally obtained magnetic carboxylic functionalized CNC (MCNC-DPTA). The effects of the reaction parameters on the adsorption process were systematically studied by transmission electron microscopy, X-ray diffraction, Vibration sample magnetometry, Fourier transform infrared spectroscopy, and X-ray photoelectron spectroscopy. Additionally, the effects of the solution pH, the initial concentration of Pb, and the adsorption time on the adsorption properties of the materials were evaluated. Furthermore, the structure, morphology, and thermal properties of the solution were systematically studied. After 6 cycle tests, the adsorption amount of Pb(II) by MCNC-DPTA was only reduced by 7%. These results show that MCNC-DPTA is an environment-friendly adsorption material with an excellent Pb(II) removal effect.
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高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2019
·
IF 4.561
Yanrong Liu,Yi Nie,Fengjiao Pan,Le Zhou,Xiaoyan Ji,Zhaoqing Kang,Suojiang Zhang
In this work, the cellulose phase separation behavior was investigated by using ionic liquids (ILs) as novel solvents to acquire a green process for cellulose fiber spinning. The cloud point titration method combined with the turbidity correlation equation was used to obtain the ternary diagram of IL/cellulose/coagulator throughout the whole compositional range. The effects of the type of ILs, the cellulose materials, the kind of coagulators and the regeneration temperatures for cellulose fiber manufacturing process on the phase separation behavior were studied systematically. It was found that the linearized cloud point (LCP) curve correlation fits to experimental data well and can be used to quantify the optimized coagulator, and among the studied cases, the system of [EMIM]DEP, cotton pulp and water with the regeneration temperature at 298.15 K is the best. Meanwhile, COSMO-RS was used to predict the interaction between solvent, cellulose and coagulator, and the comparison with the LCP correlation shows good agreement. The crystal structure of the regenerated cotton pulp was determined with XRD, and the result evidences that the crystal structure of the regenerated cellulose transforms from cellulose I to cellulose II. The crystallinity decreases from 96.0% (raw cotton pulp) to 85.6% after 24 h dissolution in [EMIM]DEP at 363.15 K, and it has a slight deviation from 24 h to 72 h, which illustrates that the spinning process can run continuously at 363.15 K when using [EMIM]DEP as the solvent.
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高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2016
·
IF 1.835
Yixi Wang,Linyan Zhao,Huili Peng,Jianning Wu,Zhiyong Liu,Xuhong Guo
A novel cellulose (CE)-based adsorbent was synthesized by polyacrylamide grafted quaternized cellulose (PAM-g-QC) to remove anionic dyes. The elemental analysis results showed that there were abundant amino groups on adsorbents and scanning electron microscopy indicated the structure was porous—properties that were a benefit to increase the adsorption ability. The adsorption ability was specifically investigated in different temperatures. Adsorption isotherms including the Langmuir, Freundlich, and Temkin isotherm models were studied at different temperatures (303–323 K), and the maximum theoretical adsorption capacity of the adsorbents was 380.084 mg g–1 for Congo red (CR) and 349.284 mg g–1 for Eriochrome blue SE (EBSE) at 323 K by the Langmuir isotherm model. The adsorption data was fitted to the adsorption kinetics (pseudo-first-order kinetic, pseudo-second-order kinetic, and intraparticle diffusion models), and the pseudo-second-order kinetic model showed a better fit for the adsorption of CR and EBSE. Thermodynamic parameters (ΔHo, ΔSo, and ΔGo) showed that the adsorption of EBSE and CR was feasible, endothermic, and spontaneous from 303 to 323 K. The adsorption and desorption mechanism of CR and EBSE also was investigated in this study, which verified that electrostatic adsorption played a main role between adsorbents and adsorbates. A comparison with other cellulose-based adsorbents confirmed that the CE/PAM-g-QC adsorbent possessed excellent potential and practical value in dye wastewater treatment.
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高影响因子
危险品化学品经营许可证（带存储）