INDUSTRIAL CROPS AND PRODUCTS
·
2022
·
IF 6.449
Yu-Hui Jiang,Yu-Qing Zhang,Zhan-Hua Wang,Qing-Da An,Zuo-Yi Xiao,Ling-Ping Xiao,Shang-Ru Zhai
Utilizing renewable biomass components to design oil-water separation membranes is the hot spot of environmental remediation owing to their degradable and sustainable features and the increasing concern of large production of oily wastewater. Herein, the aminated lignin (AL) with multi-active sites to be constructed was loaded onto cotton fibers and then cross-linked with green ethyl cellulose (EC) to synthetize hydrophobic/lipophilic ethyl cellulose cotton (AL@Cotton-EC). Considering that methyltrimethoxysilane (MTMS) can build low surface energy coatings, we further introduced and built the superhydrophobic AL@Cotton-EC/MTMS separation membranes. The EC can wrap on the surface of cotton and assemble an interpenetrated porous structure with excellent wetting properties. Combined with the low surface energy and superwettability of MTMS, the prepared AL@Cotton-EC/MTMS exhibited an excellent separation efficiency of 99.33% in oil-water separation with good cycling stability. In addition, by simulating outdoor acidic, alkaline and salt environments, it was found that AL@Cotton-EC/MTMS still met the superhydrophobic conditions. Thus, our materials showed huge potential for treating oily wastewater. This work completed the research on the properties of oil-water separation materials. It provided new directions for the design and development of innovative materials for green, recyclable, biodegradable and alternative energy sources .
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2022
·
IF 8.025
Chen Wang,Fei Song,Xiu-Li Wang,Yu-Zhong Wang
Advanced templating methods have shown precise regulation of the micro/nanostructures of inorganic catalysts. Here, on the basis of controlled self-assembly and micro-structures of cellulose nanocrystals (CNCs), a new bio-mass-mediated templating approach is proposed to control the growth of gold nanoparticles (Au NPs). The catalytic performance of the as-prepared Au NPs was evaluated using p-nitrophenol as a model pollutant. TEM, POM, zeta-potential, and rheological measurements were conducted to investigate the structure and catalytic activity of the nano-materials. By regulating the chiral nematic liquid crystal texture formed by the self-assembly of CNCs, the size of Au NPs could be adjusted at the nanoscale dimension, from 1.38 ± 0.38 nm to 4.25 ± 1.24 nm. Depending on the Au size, a high catalytic effect, namely, 98.0% conversion rate, was obtained within 30 min. The conversion rate was maintained at 97.0% even after 3-run cyclic application. Such findings demonstrate the potential of using CNCs as a bio-template to control the growth of nanomaterials.
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高影响因子
MACROMOLECULAR RESEARCH
·
2022
·Vol. 30
·期 5
·325-333
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IF 2.127
Ting Zhou Xin,Yan Liu Jin
Acetylation of bacterial cellulose whisker (BCW) with acetic anhydride can effectively improve the thermal stability of BCW and the dispersion of interface compatibility with PHBV. The influence of the modified cellulose whiskers on the crystallization and mechanical properties of the PHBV matrix was studied using differential scanning calorimetry (DSC), polarization optical microscopy (POM), and XRD. The results show that ABCW has heterogeneous nucleation and hindrance effect on the PHBV matrix simultaneously. With the increase of ABCW content, PHBV gradually decreases from large spherulite and then increases, and the crystallinity decreases. When the content of ABCs is 1.2%, ABCW has the best strengthening effect on PHBV, and the bending strength and bending modulus are 44.7% and 34.5% higher than PHBV.
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Sustainable Energy & Fuels
·
2022
·Vol. 6
·期 10
·2602-2612
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IF 6.813
Haosheng Xin,Haiyong Wang,Song Li,Xiaohong Hu,Chenguang Wang,Longlong Ma,Qiying Liu
Catalytic conversion of renewable cellulose, instead of fossil resources, to high-value ethylene glycol (EG) is of great significance for reducing considerable worries regarding the energy problem. However, the EG production from cellulose is dependent on Ni and Ru based catalysts. Herein, encapsulated Co@C catalyst was firstly applied for EG production from cellulose combined with tungstic acid (TA). The mixing of the two catalysts in different ratios was compared and well-controlled, and the highest 67.3% yield of EG can be achieved. TA is used mainly to promote both the cellulose hydrolysis and the retro-aldol reaction of glucose to glycolaldehyde. Co@C catalysts are responsible for the hydrogenation of glycolaldehyde to EG. Compared with traditional noble metals and composite catalysts, the inexpensive and easily synthesized Co@C catalysts could greatly reduce the cost of production of EG. The Co@C catalysts encapsulated with outside graphene layers can keep high stability for at least 6 runs.
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ACS Sustainable Chemistry & Engineering
·
2022
·
IF 9.224
Cheng Huang,Guanglei Zhao,Yanghui Song,Chong Xie,Sihan Zhang,Xiaofeng Li
The material processing procedure of cellulose nanocrystals (CNCs) was investigated for use as a proton exchange membrane (PEM) of direct methanol fuel cells (DMFCs). The CNCs were prepared from pulp via the sulfuric acid hydrolysis homogenization method. Novel biodegradable and environmentally friendly PEMs with good proton conductivity and mechanical properties were successfully prepared by grafting cytidine monophosphate, taurine, and cysteine onto CNC backbones. The DMFC operation test demonstrated that the modified films had a good power output performance and lower methanol permeability comparable to those of the available commercial membrane, which was nonbiodegradable and involved toxic fluorination. Their high performance and environmental friendliness indicated that the modified films might have potential applications in DMFCs.
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Polymers
·
2022
·Vol. 14
·期 6
·1077
·
IF 4.967
Peiyuan Feng,Xiwen Wang,Jin Yang
Aerogels have great potential in oil absorption applications; however, many reported aerogels have the drawbacks of a low oil-recovery rate and poor mechanical properties, which limit their application. In this study, highly reusable graphene oxide (GO)/TEMPO-oxidized cellulose nanofiber (TOCN)/polyvinyl alcohol (PVA) aerogels with excellent mechanical properties and with an architecture similar to that ofThalia dealbatastems were fabricated through a three-step process of bidirectional-freezing, freeze-drying, and chemical vapor deposition (CVD) modification. After CVD modification, the modified GTPA (MGTPA) accorded hydrophobicity. The synergistic effects of the three components and the unique biomimetic structure conferred biomimetic-MGTPA (b-MGTPA) with excellent compressible properties. As an adsorbent, b-MGTPA showed a high adsorption capacity (75–151 g/g) for various types of organic solvents. In addition, its high compressibility enables b-MGTPA to have fast and highly efficient recovery of absorbed oil through simple mechanical squeezing and it possesses excellent reusable stability (the oil recovery rate and oil retention rate reached 80% and 91.5%, respectively, after 10 repeated absorption–compression cycles).Keywords:aerogel;bidirectional freezing;biomimetic structure;oil absorption;recyclability
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JOURNAL OF DISPERSION SCIENCE AND TECHNOLOGY
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2022
·
IF 2.042
Dongqing Zhao,Lijuan Zhang,Yao Lu,Haotian Li,Saiqi Wang,Haikuan Yuan,Xijian Liu,Chengyin Wang,Xueyan Zhu,Jie Lu
A tetraethylenepentamine modified magnetic cellulose nanocrystal composites (Fe3O4@CNC-TEPA) was prepared by the coprecipitation method and Schiff base reaction, which could adsorb Congo red (CR) efficiently. The morphology and structure of the nanoparticles were characterized by atomic force microscopy (AFM), field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), fourier transform infrared spectroscopy (FTIR), vibrating sample magnetometer (VSM), zeta potential (ZETA), X-ray photoelectron spectroscopy (XPS) and Brunauer-Emmett-Teller (BET). Subsequently, the Fe3O4@CNC-TEPA adsorbed CR was investigated by comparative experiments, selective adsorption experiments, effect of pH, effect of adsorbent dosage, adsorption isotherms, thermodynamics parameters, adsorption kinetics, leaching experiments, desorption and reusability experiments. Results revealed the fact that the nanoparticles showed excellent adsorption capacity of CR (1049 mg g−1) due to the abundant hydroxyl and amino groups on the surface of the Fe3O4@CNC-TEPA. The adsorption process was best described by the the Langmuir equation and pseudo-second-order kinetic model. Moreover, the Fe3O4@CNC-TEPA loaded with CR can be recycled with NaOH solution easily, which can be used repeatedly for CR adsorption. After six cycles, the adsorption capacity was still about 81.5% of the original particles’. The environmentally friendly nanoparticles have great application prospects as adsorbents for removing CR.
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CELLULOSE
·
2022
·Vol. 29
·期 13
·7263-7276
·
IF 6.123
Qiao Liangzhi,Liao Yuxin,Wang Xiawen,Wang Shanshan,Du Kaifeng
Cellulose microspheres are commonly chromatographic media yet seriously limited in biomacromolecules separation and purification due to the slow mass transfer kinetics resulting from their narrow nanopores. Herein, a macroporous cellulose microsphere (MCM) with enhanced mass transfer ability has been successfully developed by an oil-in-water-in-oil (O 1 /W/O 2 ) double emulsion strategy. The evolution profile of the double emulsion was tracked and achieved the optimization of interconnected macroporous structure. The macroporous structure not only provide fast mass transfer pathways for proteins but also increase the accessibility of meso/micropores. Benefitting from the macropores, the obtained diethylaminoethyl-modified MCM (DEAE-MCM) exhibits high permeability (3.81 × 10 –13 m 2 ), and fast adsorption rate (reaching equilibrium within 40 min) and high adsorption capacity (334.21 mg/g) for bovine serum albumin, far superior to commercially DEAE Sepharose Fast Flow. More importantly, under the high flow rate, DEAE-MCM remains a high dynamic adsorption capacity, promising it for fast protein chromatography.
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高影响因子
ENVIRONMENTAL TECHNOLOGY
·
2022
·
IF 3.475
Tong Li,Caixia Cheng,Kaifeng Zhang,Jie Yang,Guangshuo Han,Xiuju Wang,Zhongpeng Wang,Liguo Wang
In this paper, the hydrophilic UiO-66-NH2 nanomaterial was synthesized by the solvent-thermal method and characterized. Then, UiO-66-NH2 was introduced into the casting membrane solution of cellulose acetate (CA) forward osmosis (FO) membrane, and CA/UiO-66-NH2 forward osmosis membrane was prepared by the phase inversion method. The optimum preparation conditions of CA/UiO-66-NH2 mixed matrix membranes were determined as follows: the content of UiO-66-NH2 was 0.4 wt%, the coagulation bath temperature was 35°C, the mixing temperature was 50°C and the heat treatment temperature was 50°C. FTIR, SEM, water contact angle and AFM were carried out on CA/UiO-66-NH2 forward osmosis membrane prepared under the best preparation conditions. Compared to the CA forward osmosis membrane, the permeability and selectivity of the CA/UiO-66-NH2 membrane were improved. The water flux and reverse salt flux of the CA/UiO-66-NH2 forward osmosis membrane reached 52.32 L/(m2·h) and 2.43 g/(m2·h), respectively. The permeability selectivity of CA membranes and CA/UiO-66-NH2 membranes did not change much during 180 min, indicating that the two membranes had good long-term stability. This study shows a potential advantage of UiO-66-NH2 as additives for improvement in the desalination performance of forward osmosis membranes.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2022
·
IF 8.025
Jingwen Yang,Xianhao Zhang,Lin Chen,Xi Zhou,Xiaojing Fan,Yayun Hu,Xuening Niu,Xinglian Xu,Guanghong Zhou,Niamat Ullah,Xianchao Feng
Bacterial cellulose (BC) was used as a reinforcing agent, citric acid (CA) as a cross-linking agent, and CMC@AgNPs as antibacterial nanomaterials, in which CMC@AgNPs were reduced from AgNO 3 in situ by carboxymethyl cellulose (CMC) as a reducing agent and stabilizer to fight microbial corruption. Its potential application in packaging fresh meat has been investigated. Results showed that the antibacterial CMC@AgNPs/BC/CA aerogels with excellent structural integrity and outstanding water absorption were developed by adding 0.3% BC and 0.25% CA. The CMC@AgNPs/BC/CA aerogel significantly reduced the color change and the total viable bacterial counts (TVC) in fresh meat after 7 days of refrigerated storage. The results indicated that CMC@AgNPs/BC/CA aerogels can effectively extend the shelf life of fresh meat, and can be used for meat packaging as a biologically active absorption pad.
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高影响因子
ChemElectroChem
·
2022
·Vol. 9
·期 11
·e202200191
·
IF 4.782
Yinglin Yan,Yuanyuan Yang,Chaojiang Fan,Yiming Zou,Qijiu Deng,Haidong Liu,Daniel Brandell,Rong Yang,Yunhua Xu
Graphical From waste to battery : Waste office paper was used to prepare a free-standing paper-based carbon (FPC) substrate, which was further modified with reduced graphene oxide (rGO) nanosheets (rGO@FPC) by a vacuum filtration method. After S impregnation, the rGO@FPC/S free-standing cathode was employed in Li−S batteries, which exhibited competitive cycling life and significant blocking action for polysulfide ions. Due to large sulfur (S) content and simple manufacturing techniques, free-standing cathodes for lithium-sulfur (Li−S) batteries are gaining a lot of attention recently. Waste office paper, which is consumed in large quantities annually, was used to make a free-standing paper-based carbon (FPC) substrate, which inherited fiber-like morphology. In addition, reduced graphene oxide (rGO) nanosheets modified FPC (rGO@FPC) host was also prepared by a vacuum filtration method. After S impregnation, the FPC/S and rGO@FPC/S free-standing cathodes were employed in Li−S batteries. The rGO@FPC/S free-standing cathode exhibited extremely competitive electrochemical performance, including a reversible discharge capacity of 315 mAh g −1 at 0.5 C after 500 cycles. This is due to the uniform S distribution, which boosts the utilization ratio, and the significant blocking action for polysulfide ions, which prevents the redox shuttle effect.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2022
·
IF 8.025
Gaolu Zhu,Yu Wang,Xi Tan,Xueju Xu,Pan Li,Dong Tian,Yongze Jiang,Jiulong Xie,Hui Xiao,Xingyan Huang,Yuzhu Chen,Zhiping Su,Jinqiu Qi,Shanshan Jia,Shaobo Zhang
Since natural cellulose is mostly cellulose I and has a fibrous form, most cellulose-based adsorbents are fibrous/rod-shaped and exhibit the cellulose I crystal structure. This study reports a cellulose II-based spherical nanoparticle microcluster adsorbent (SNMA), synthesized from biomass by a bottom-up approach, for removing toxic hexavalent chromium (Cr(VI)). The basic structure of SNMA was investigated. Notably, the prepared adsorbent was a microcluster composed of spherical nanoparticles, while exhibiting cellulose II crystal structure, resulting in higher thermal stability and significantly enhanced adsorption performance. The adsorption process and mechanism of SNMA on Cr(VI) were studied in detail. The SNMA achieved a high adsorption capacity (225.94 mg/g) and receptor site density. The SNMA is expected to be used as a bio-based spherical nanoparticle microcluster adsorbent platform for the adsorption of different toxic substances by changing the surface functional groups of its components, spherical nanoparticles.
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