Polymers
·
2022
·Vol. 15
·期 1
·203
·
IF 4.967
Kewei Shu,Siyu Tian,Yu Wang,Guiqiang Fei,Liyu Sun,Huizhu Niu,Yihao Duan,Guangyu Hu,Haihua Wang
One of the most critical challenges for commercialization of sodium-ion battery (SIB) is to develop carbon anodes with high capacity and good rate performance. Graphene would be an excellent SIB anode candidate due to its success in various kinds of batteries. Liquid-phase exfoliation (LPE) method is an inexpensive, facile and potentially scalable method to produce less-defected graphene sheets. In this work, we developed an improved, dispersant-assisted LPE method to produce graphene composite materials from raw graphite with high yield and better quality for SIB anode. Here, bacterial cellulose (BC) was used as a green dispersant/stabilizer for LPE, a “spacer” for anti-restacking, as well as a carbon precursor in the composite. As a result, the carbonized BC (CBC)/LPE graphene (LEGr) presented improved performance compared to composite with graphene prepared by Hummers method. It exhibited a specific capacity of 233 mAh g−1at a current density of 20 mA g−1, and 157 mAh g−1after 200 cycles at a high current density of 100 mA g−1with capacity retention rate of 87.73%. This method not only provides new insight in graphene composites preparation, but also takes a new step in the exploration of anode materials for sodium-ion batteriesSIBs.Keywords:liquid phase exfoliation;bacterial cellulose;graphene composite;sodium-ion battery
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2022
·
IF 8.025
Jiaji Yue,Siying Zhou,Xingxiang Ji,Chunqi Jiao,Yi Cheng,Yehan Tao,Jie Lu,Jian Du,Haisong Wang
Robust biopolymer-based composite film with multifunctional performances significantly contributes to the packaging field. Herein, we proposed a sort of carboxymethyl cellulose (CMC) based composite film via incorporating versatile zeolitic imidazolate framework (ZIF) materials. Compared to pristine CMC film, the OTR, WVTR, and tensile strength of CMC/ZIF composite film with 1 wt ‰ Zn/Co-ZIF were improved from 64.89 cm 3 *μm/(m 2 *d*kPa), 1579.21 g/(m 2 *24h) and 16.9 MPa to 20.79 cm 3 *μm/(m 2 *d*kPa), 1209.58 g/(m 2 *24h) and 70.1 MPa, respectively. Notably, owing to the reduced band gap and intrinsic chemical and thermal stability of Zn/Co-ZIF, the fabricated Zn/Co-ZIF/CMC composite film presented well UV protection capability within the whole UV region and excellent UV-blocking durability after being exposed to UV-light at 365 nm for 12 h. In practice, the photocatalytic degradation of RhB solutions under UV light could be effectively suppressed when using Zn/Co-ZIF/CMC film as UV protection layer. Our findings proposed the potential application of these versatile ZIF materials as functional nanofiller within biopolymer substances for UV protection and transparent packaging area.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ChemSusChem
·
2019
·Vol. 12
·期 17
·3977-3987
·
IF 7.804
Qiying Liu,Haiyong Wang,Haosheng Xin,Chenguang Wang,Long Yan,Yingxiong Wang,Qi Zhang,Xinghua Zhang,Ying Xu,George W. Huber,Longlong Ma
Graphical Cellulose conversion into ethanol : Ethanol is obtained through one-pot cellulose hydrogenolysis over graphene-layers-encapsulated nickel catalysts with the aid of H 3 PO 4 in water. This work, for the first time, demonstrates a chemocatalytic approach for a high-yield production of ethanol from biomass using a non-noble metal catalyst. Ethanol is an important bulk chemical with diverse applications. Biomass-derived ethanol is traditionally produced by fermentation. Direct cellulose conversion to ethanol by chemocatalysis is particularly promising but remains a great challenge. Herein, a one-pot hydrogenolysis of cellulose into ethanol was developed by using graphene-layers-encapsulated nickel (Ni@C) catalysts with the aid of H 3 PO 4 in water. The cellulose was hydrolyzed into glucose, which was activated by forming cyclic di-ester bonds between the OH groups of H 3 PO 4 and glucose, promoting ethanol formation under the synergistic hydrogenation of Ni@C. A 69.1 % yield of ethanol (carbon mole basis) was obtained, which is comparable to the theoretical value achieved by glucose fermentation. An ethanol concentration of up to 8.9 wt % was obtained at an increased cellulose concentration. This work demonstrates a chemocatalytic approach for the high-yield production of ethanol from renewable cellulosic biomass at high concentration.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry A
·
2018
·Vol. 7
·期 1
·157-164
·
IF 9.931
Danyang Zhao,Yuyang Tian,Xiaofei Jing,Yun Lu,Guangshan Zhu
Bisphenol A (BPA), an endocrine disrupting compound (EDC) that affects the human nervous system, is used worldwide and is difficult to remove from water. PAF-1@cellulose nanofibril (CNF) composite aerogels are prepared through a double-cross-linking method and applied as adsorbents to remove BPA from water. With the successful combination of the high surface area of PAF-1 and the bulk skeleton of CNFs, as well as strong interactions between BPA molecules and the networks, the resulting composite aerogels can remove 77.7% of BPA, dissolved in water, within 10 seconds at an adsorption rate of 532.2 mg g−1 min−1, and their removal efficiency reaches 97.0% after 1 hour of adsorption. The adsorption capacity of PAF-1@CNF composite aerogels towards BPA is estimated to be as high as 1000 mg g−1 according to the Langmuir adsorption model.
✓ 已验证
产品关联
DOI
高影响因子
SOLAR ENERGY MATERIALS AND SOLAR CELLS
·
2019
·
IF 6.019
Lisheng Tang,Xing Zhao,Changping Feng,Lu Bai,Jie Yang,Ruiying Bao,Zhengying Liu,Mingbo Yang,Wei Yang
The development of solar thermal energy storage technologies associated with phase change materials (PCMs) can greatly improve the utilization efficiency of solar energy, which is of significance to alleviate the global energy shortage. A large number of photodriven shape-stabilized composite PCMs has been exploited in recent decades, while the majorities of studies have demonstrated that the properties of composite PCMs are improved at the expense of energy storage density owing to that the introduced functional materials are substituted for a considerable portion of phase change matrix. Here, three-dimensional (3D) porous skeletons composed of bacterial cellulose (BC) as the supporting material and MXene as the photothermal material are introduced into polyethylene glycol (PEG) to fabricate composite PCMs with excellent comprehensive properties. The obtained composite PCMs show excellent shape stability, efficient photothermal conversion ability and extremely high energy storage capacity , which sheds substantial light on the efficient utilization of solar energy.
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2019
·
IF 8.456
Xiang-Jun Zha,Xing Zhao,Jun-Hong Pu,Li-Sheng Tang,Kai Ke,Rui-Ying Bao,Lu Bai,Zheng-Ying Liu,Ming-Bo Yang,Wei Yang
Solar-driven interfacial water evaporation is regarded as an effective, renewable, and environment-friendly technology for clean water production. However, biofouling caused by the nonspecific interaction between the steam generator and biofoulants generally hinders the efficient application of wastewater treatment. Herein, this work reports a facile strategy to fabricate flexible anti-biofouling fibrous photothermal membrane consisting of a MXene-coated cellulose membrane for highly efficient solar-driven water steam evaporation toward water purification applications. The as-prepared MXene/cellulose photothermal membrane exhibits light absorption efficiency as high as ∼94% in a wide solar spectrum range and a water evaporation rate up to 1.44 kg m–2 h–1 under one solar illumination. Also, the MXene/cellulose membrane shows very high antibacterial efficiency (above 99.9%) owing to the MXene coating as a highly effective bacteriostatic agent. Such a flexible, anti-biofouling, and high-efficiency photothermal membrane sheds light on practical applications in long-term wastewater treatments.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Cleaner Production
·
2019
·
IF 6.395
Kuichuan Sheng,Shen Zhang,Jianglong Liu,Shuang E,Caidi Jin,Zenghua Xu,Ximing Zhang
Hydrochar microsphere as clean and facile carbon materials have great potentials to be used in biomass valorization for producing value-added chemicals. In this study, the hydrochars obtained from cellulose and xylan were prepared. The effect of hydrothermal conditions on hydrochars’ chemical composition, thermal stability and the porosity obtained from cellulose and xylan were evaluated. In order to explore the application of the hydrochar in biofuel production, the cellulose derived hydrochar supported Al catalyst (Al-Cel-HTC) was prepared by one-step hydrothermal process for catalysis glucose isomerization . We found distinct physicochemical properties between cellulose and xylan derived hydrochar. The specific surface area ( S BET ) of cellulose derived hydrochar (118 m 2 /g) is significantly higher than that of xylan derived hydrochar (28 m 2 /g). The hydrochars are composed of carbonaceous microspheres as evidenced by SEM. The catalytic performance of Al-Cel-HTC was investigated. Results shown that 77.8 mol/% selectivity of glucose to fructose can be obtained in aqueous by the catalyst. The SEM-EDS images of the catalyst shown the strong crystal-hydrochar microsphere interaction benifit in diminishing the agglomeration of hydrochar microsphere. The BET specific surface area and crystal structure (AlO(OH) and Al 2 O 3 ) of hydrochar supported aluminum catalyst have positive correlation with the catalytic selectivity.
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS LETTERS
·
2019
·
IF 3.019
Heng Chen,Rui Li,Jintao Xie,Xiayi Xu,Shaojun Chen
In this contribution, alkaline carbonates were used as catalyst to develop an one-pot approach for esterification between cellulose and methacrylate anhydrides in aqueous solution. FTIR, 13 C CP/MAS NMR and XRD analysis revealed successful esterification in amorphous domains of cellulose without affecting the cellulose crystal structure. The obtained methacrylated cellulose was amenable to further functionalization via thiol–ene click reactions. After this esterification under alkaline aqueous condition, cellulose can be easily grafted with thiolated motifs including fluorophores and bioactive peptide. Our work demonstrates an easy strategy for cellulose modification and functionalization and will greatly promote the wide-spread applications of cellulose-based materials.
✓ 已验证
产品关联
DOI
高影响因子
CELLULOSE
·
2018
·Vol. 26
·期 3
·1683-1701
·
IF 3.809
Ru Jing,Tong Congcong,Chen Ning,Shan Pengjia,Zhao Xingke,Liu Xuying,Chen Jinzhou,Li Qian,Liu Xiaohuan,Liu Hongzhi,Zhao Ying
Abstract In this work, quaternized nanofibrillated cellulose (Q-NFC) was isolated from bamboo bleached kraft pulp through the pre-treatment using 2, 3-epoxy-propyltrimethylammonium chloride (EPTAC) in an aqueous alkaline media and subsequent high-pressure homogenization. A series of aqueous Q-NFC dispersions with different contents of positively charged trimethylammonium groups on the surfaces of fibrils were obtained. With the amount of added EPTAC increased, the solid recovery ratio, surface charge contents, zeta potential values, and extent of nanofibrillation gradually increased for the as-obtained Q-NFCs. TEM images of Q-NFCs revealed that the incorporation of quaternary ammonium groups contributed to the defibrillation into finer nanofibrils with more uniform width distribution. With an increase in the positive charge contents, both degree of polymerization and decomposition temperature of the Q-NFC films decreased slowly. Steady-state rheological result demonstrated that the maximum shear viscosity was achieved for the Q-NFC0.6 dispersion with the medium charge content. The Q-NFC films with higher charge content displayed superior transparency and tensile strength. Furthermore, the oxygen transmission rate of PLA films was remarkably decreased dramatically from 216.0 to 10.3 mL m −2 day −1 after laminating a thin layer of Q-NFC0.6 on the one side. As compared to TEMPO-oxidized NFC from the same pulp, the surface-charged Q-NFC exhibited higher optical transmittance, shear viscosity, and thermal stability as well as comparable oxygen-barrier properties. Graphical abstract
✓ 已验证
产品关联
DOI
高影响因子
COMPOSITES PART B-ENGINEERING
·
2018
·
IF 4.92
Kuichuan Sheng,Shen Zhang,Shaoping Qian,Cesar A. Fontanillo Lopez
We prepared poly(lactic acid) (PLA)/bamboo cellulose nanowhiskers (BCNW) bionanocomposite with a high toughness but a low modulus in the previous work. In this paper, a new reinforcement, silane surface-modified ultrafine bamboo-char (UFBC), was employed to strengthen the binary PLA/BCNW bionanocomposite. The ternary bionanocomposite films were fabricated by a solution casting with different contents of surface-treated UFBC in the range of 0.25 wt% to 4.0 wt%. The functionalization of UFBC with (3-mercaptopropyl)trimethoxysilane (A-189) favored its dispersion in the PLA matrix; sea-island and nuclear-shell characteristics were observed by the scanning electron microscopy (SEM) and transmission electron microscopy (TEM). When the UFBC content was 0.25 wt%, the tensile strength and elongation at break increased by 99.26% and 104.93%, respectively, comparing to the neat PLA. Differential scanning calorimetry (DSC) results showed that glass transition temperature , crystallization temperature , crystallization enthalpy and crystallinity increased with the increase of UFBC contents. Thermogravimetric analysis demonstrated that the thermal degradation stability decreased with the UFBC addition. BCNW and UFBC produced a synergistic effect on composites’ toughening and strengthening. These results provided a basic understanding of PLA enhancement mechanism and a simple approach for PLA composite manufacture with sound mechanical properties .
✓ 已验证
产品关联
DOI
高影响因子
LANGMUIR
·
2019
·
IF 3.683
Jingxian Jiang,Juan Zhu,Qinghua Zhang,Xiaoli Zhan,Fengqiu Chen
Severe water pollution has placed a heavy burden on the ecological environment on which humans rely. Effective approaches to mitigating this worldwide issue are in great demand. Here in this work, an organic–inorganic bacterial cellulose aerogel was fabricated through a freeze-drying technique and a step-by-step coating method. The as-prepared aerogel possessed an intact three-dimensional porous structure, an ultralow density, and shape recovery performance. Ag2O nanoparticles were uniformly and firmly dispersed on the cellulose skeleton, endowing the as-prepared aerogel with an excellent photocatalytic degradation property of methylene blue and great recyclability. The aerogel with zwitterionic compounds attached through the effect of silane exhibited superhydrophilicity, superoleophilicity, and underwater superoleophobicity as well as underoil superhydrophobicity, and it could separate oil/water mixtures with high efficiency. This environmentally friendly bacterial cellulose aerogel equipped with multifunctionality showed great potential for wide application in water treatment fields.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CARBOHYDRATE POLYMERS
·
2019
·
IF 6.044
Chunxiang Ding,Chenyang Cai,Lixun Yin,Qinglin Wu,Mingzhu Pan,Changtong Mei
Strain-transfer plays a key role in overall modulus of mechanically adaptive nanomaterials. Herein, mechanically adaptive nanocomposites were prepared via introducing cellulose nanocrystal (CNC) percolating network into poly butyl methacrylate (PBMA) with polyethylene glycol (PEG) as a stabilizer. The prepared PBMA/CNC nanocomposites were soaked in deionized water at 23 °C and 37 °C for one week to investigate their mechanically adaption. The interactions between PEG, CNC , and PBMA were assessed by Fourier Transform infrared, X-ray diffraction, and X-ray photoelectron spectroscopy. Incorporation of PEG to CNC and PBMA/CNC nanocomposites on the morphological and thermal properties was also investigated. The mechanical adaption of PBMA/CNC nanocomposites after switching dry-to-wet state and surrounding temperature (soaked in deionized water at 23 °C and 37 °C for one week, respectively) was evaluated by mechanical testing. Meantime, digital image correlation (DIC) was firstly used to study strain transfer mechanism in mechanical adaption which was carried out in real-time synchronized with mechanical measurement. It indicated that PEG improved the dispersion of CNC in PBMA/CNC nanocomposite and its thermal properties. Furthermore, CNC with PEG modification bridged PBMA during crack propagation and promoted the stress and stain transfer in PBMA/CNC nanocomposites according to DIC analysis.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）