CELLULOSE
·
2016
·Vol. 23
·期 2
·1325-1334
·
IF 3.195
Chen Mingjie,Zhang Xueqin,Zhang Aiping,Liu Chuanfu,Sun Runcang
Lignocellulosic biomass aerogels with relatively high Brunauer–Emmett–Teller (BET) surface area and pore volume were prepared directly from bagasse solutions in the present study. Bagasse was dissolved in DMSO/LiCl, treated with cyclic freezing-thawing processes, and regenerated with water. The resulted bagasse hydrogels were solvent-exchanged to t-butanol and subjected to freeze-drying to obtain the lignocellulosic aerogels. The structure of the aerogels was studied with FTIR, nitrogen absorption, SEM, and XRD. The results showed that the aerogels had sheet-like skeletons interconnected with one another to form three-dimensional networks. The highest BET surface area and total pore volume of the aerogels were 185 m 2 /g and 0.46 cm 3 /g, respectively. By adjusting the concentration of bagasse solution in DMSO/LiCl, the structure of the aerogels could be controlled to some extent.
研究领域:
材料科学
·
生物质能
✓ 已验证
产品关联
DOI
高影响因子
Journal of Water Process Engineering
·
2023
·
IF 7
Guanfeng Lin,Yongzhi Xiong,Guilong Wang,Simin Li,Rongyuan Jiang,Beili Lu,Yandan Chen,Biao Huang
Adsorption and selective adsorption are effective means of separating rare earths (REs) from aqueous solutions and reducing heavy metal contamination. In this work, bagasse was used as carbon source and phytic acid as phosphorus source and activator, and a simple synthesis strategy was applied to prepare the effective adsorbent P-doped porous carbon (PC) of lanthanum ions (La 3+ ). Doping of P was helpful to enhance the adsorption and selectivity of porous carbon to La 3+ . Compared with the samples without P-doping, the adsorption capacity of PC on La 3+ was increased by >4 times, and the theoretical maximum adsorption capacity is as high as 342.2 mg g −1 , which was greater than that of other reported carbon-based materials. In addition, the selective adsorption of PC on La 3+ was as high as 96.07 % and 71.07 % not only in the multi-ion coexistence system of La 3+ , Ni 2+ , Zn 2+ , Co 2+ , Ca 2+ , and Na + , but also in the La 3+ /Na + (1:50) coexistence system with very low La 3+ content, respectively. The adsorption of La 3+ on PC-800 is mainly chemisorption , where C-P-O, C/P=O and C-O-P groups are the main active sites for adsorption and improves the selectivity. This work can furnish some useful message on designing and synthesizing of carbon-based adsorbent, which has excellent adsorption selectivity in polyionic and low La 3+ coexistence systems.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF WOOD CHEMISTRY AND TECHNOLOGY
·
2020
·
IF 1.899
Jiaoyang Li,Yuxin Liu,Bing Sun,Renfeng Zhang
In the present work, bagasse hemicelluloses were crosslinked using citric acid as a nontoxic crosslinking agent to improve the wet strength of hemicelluloses/SPI composite films at moderate relative humidity (RH). Fourier transform infrared and thermal analysis confirmed the formation of ester crosslinks between hemicelluloses and citric acid and led to lower the degradation temperature. The wet tensile strength properties of the citric acid crosslinked hemicelluloses/SPI films in 50 − 95% RH was improved significantly, compared to the uncross-linked films. Particularly, the results indicated that the films crosslinked under 0.44 degrees of substitution showed the best comprehensive properties among all films. However, excessive addition of citric acid in the composite films might decrease the compatibility of the films and have negative effects on their performance. This study provides an effective pathway for preparation of hemicelluloses/SPI composite films with improved wet strength properties, which have a potential as packaging material for food application.
研究领域:
材料科学
·
生物化学
✓ 已验证
DOI
高影响因子
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
·
2022
·
IF 7.926
Zhuang Liu,Dachao Ma,Liwu Liang,Xuan Hu,Mengxue Ling,Zhou Zhou,Lizhong Fu,Zheng Liu,Qingge Feng
Hydrothermal treatment (HTT) of polyvinyl chloride (PVC) can efficiently remove chlorine (Cl) to produce low Cl hydrochar for solid fuel. This work performed co-hydrothermal treatment of PVC recycled plastics (PVC R ) with biomass, then tried to reveal the combustion behavior and Cl migration behavior during combustion of PVC-derived hydrochar . It is shown that the hydrothermal temperature was the dominant factor affecting the degradation and dechlorination of PVC R . Treated at 220 ℃ for 60 min, the dechlorination efficiency of PVC R was 4.88 wt% and it was significantly increased to 34.09 wt%, 28.60 wt% and 32.50 wt% when PVC R was co-treated with bagasse, bagasse + high impact polystyrene (HIPS) and bagasse + acrylonitrile butadiene styrene (ABS), respectively. The substitution of Cl by hydroxyl (-OH) and elimination were two main dechlorination pathways. Bagasse could provide abundant -OH so as to promote the dechlorination of PVC R . Interestingly, in the combustion of PVC R and hydrochars, the Cl was mainly released in the form of HCl at lower temperature combustion stage but C-Cl mostly emitted at higher temperature combustion stage . The emitted Cl species strongly depends on the Cl content in hydrochar and combustion temperature , but did not show relevance to the existence form of Cl in hydrochar. Hydrothermal dechlorination could sharply reduce HCl emission.
研究领域:
环境科学
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能源工程
✓ 已验证
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2020
·Vol. 138
·期 11
·50032
·
IF 2.52
Zhiquan Chen,Juncheng Jiang,Yuan Yu,Gang Chen,Tingting Chen,Qingwu Zhang
In an effort to make rational use of resources, wasted bagasse were collected, and then fabricated by layer-by-layer (LbL) assembly to prepare an environmentally benign flame retardant for epoxy resin (EP). Six chitosan/ammonum polyphosphate bilayers were successfully deposited on the surface of bagasse, which endows EP/ 6BL @BF composites with a limiting oxygen index value of 24.1% and V-1 rating in UL-94 test. Compared with untreated bagasse, cone calorimetry test reveals that the incorporation of 6BL @BF reduces the peak heat release rate and total heat release by 64.6% and 13.2%, respectively. Besides, expandable graphite (EG) was combined with 6BL @BF to further enhance the fire safety and thermal stability of EP composites. Furthermore, the gas and condensed phase analysis of EP/ 6BL @BF/EG-3 composite was investigated by TG-IR, scanning electronic microscopy, Laser Raman spectroscopy, and X-ray photoelectron spectroscopy, and the flame retardant mechanism of 6BL @BF/EG was proposed. Finally, the mechanical properties of EP composites were investigated systematically.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2016
·Vol. 7
·期 1
·336-343
·
IF 3.289
Tao Chen,Yuhao Xiong,Yuemei Qin,Haiguan Yang,Peng Zhang,Fanggui Ye
In this study, a novel and low-cost method was developed for synthesizing magnetic porous γ-Fe2O3/C as an adsorbent and catalyst for removal of methylene blue (MB) from aqueous solution. Using FeCl3·6H2O and bagasse as the precursor, the biomass-based material was synthesized rapidly using a microwave heating process. Fe ions were introduced to achieve both adsorption and catalytic degradation by the Fenton reaction. Characterization by BET, XRD, SEM, and TEM indicated that the prepared γ-Fe2O3/C material exhibited homogeneous mesoporosity with a BET surface area, mesoporous volume, and saturation magnetization of 764.116 m2 g−1, 0.54 cm3 g−1, and 17.1 emu g−1, respectively. The material exhibited excellent adsorption and catalytic degradation abilities for removal of MB from aqueous solution (up to 352.96 mg g−1), with complete degradation of MB within 30 min. Moreover, γ-Fe2O3/C had good stability over 5 cycles. Therefore, this biomass-based γ-Fe2O3/C material can be used as a highly effective and low-cost adsorbent and catalyst and has great potential application in clean-up processes for environmental pollutants.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL CROPS AND PRODUCTS
·
2024
·
IF 5.6
Ya-Peng Du,Meng Li,Xiao-Ping Zheng,Yu Chai,Yan-Zhen Zheng
Effective pre-treatment is vital for efficiently separating and utilizing the three primary components of lignocellulose. In this investigation, agricultural by-product bagasse underwent pre-treatment using a system comprising a metal-based ionic liquid ([BMIM][AlCl 4 ]) and the biomass-derived organic acid lactic acid (LA). This combination exhibited a remarkable synergistic effect in removing lignin (72.58 wt%) while preserving cellulose (70.1 wt%) in the solid residues. The mechanism of the synergistic effect of [BMIM][AlCl 4 ] and LA was revealed by density functional theory (DFT) calculations, which elucidated the formation of weak-strength, closed-shell, and electrostatically dominant hydrogen bonds between [BMIM][AlCl 4 ]/LA and lignin. [BMIM][AlCl 4 ] and LA interacted with lignin simultaneously, significantly contributing to lignin dissolution. The removal of lignin and cellulose retention without disrupting the cellulose structure was confirmed through characterization using FTIR, SEM, and XRD techniques. Besides, the pre-treatment effectively broke down the barrier to degradation, enhancing the conversion yield of cellulose into the important platform molecule levulinic acid. Additionally, the regenerated lignin, with small molecular weight and nanometer particle size, demonstrated high antioxidant and antibacterial properties. Overall, this study provides insights into the development of ionic liquid-organic acid pre-treatment strategies for efficiently converting agricultural waste into biofuels, biochemicals, and bio-based materials.
研究领域:
生物工程
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化学工程
·
材料科学
✓ 已验证
DOI
高影响因子
Royal Society Open Science
·
2020
·Vol. 7
·期 9
·
IF 2.646
Chengqi Feng,Juan Du,Shuai Wei,Chengrong Qin,Chen Liang,Shuangquan Yao
The efficient separation of bagasse components was achieved by p-toluenesulfonic acid (p-TsOH) pretreatment. The effects of p-TsOH dosage, reaction temperature and reaction time on cellulose, hemicellulose and lignin contents were studied. Eighty-five per cent of lignin was dissolved, whereas the cellulose loss was minimal (less than 8.1%). Cellulose-rich water-insoluble residual solids were obtained. The degree of polymerization of cellulose decreased slightly, but the crystallinity index (CrI) increased from 52.0% to 68.1%. It indicated that the highly efficient delignification of bagasse was achieved by p-TsOH pretreatment. The nanocellulose filaments (CNFs) were produced by the treated samples. The physico-chemical properties of CNFs were characterized by transmission electron microscopy and thermogravimetric analysis. The results show that the CNFs have smaller average size and higher thermal stability. It provides a new method for CNFs.
研究领域:
生物化学
·
材料科学
✓ 已验证
DOI
PubMed
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2023
·Vol. 47
·期 11
·5367-5377
·
IF 3.3
Fuchao Li,Wenhan Jia,Ziyi Liu,Jianfeng Wen,Guanghui Hu,Tao Tang,Li Jiang,Xinyu Li,Ming Li,Haifu Huang
With increasing attention on environmental impacts and sustainable development, the conversion of underutilised bagasse (BG) or low-value fibre waste into biosorbents has considerable potential applications. In this study, BG carboxymethyl cellulose (BGCMC) with a high degree of substitution (DS) was prepared by controlling the ratio of monochloroacetic acid (MCA) and sodium hydroxide to BG cellulose. BGCMC aerogels (BCGel) were obtained using the crosslinking reaction of citric acid (CA) with hypophosphite sodium (HPS) as a catalyst. The adsorption results were more suitable to be described by the Langmuir isotherm (R2 > 0.99), with maximum adsorption capacities of BC3Gel for Pb(II) and MB of 353.36 and 1260.9 mg g−1, respectively. Additionally, after treatment with 50% alcohol or 0.05 M EDTA solution, BCGel exhibited satisfactory removal performance even after five regeneration cycles. X-ray photoelectron spectroscopy (XPS) and energy-dispersive X-ray spectrometry (EDS) results demonstrated that cationic exchange and electrostatic interaction were the main Pb(II) and MB adsorption mechanism. The adsorption mechanism of BCGel for pollutants involves the interaction of multiple adsorption forms. The excellent Pb(II) and MB adsorption capacities of BCGel provide another avenue for the recycling of waste BG in the wastewater treatment field.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Yuming Lin,Nian Xiang,Min Peng,Zuzeng Qin,Tongming Su,Hongbing Ji,Xinling Xie
Conductive hydrogels are utilized in flexible sensors due to their high-water content, excellent elasticity, and shape controllability. However, the sharp increase in resistance of this material under enormous strain leads to instability in the sensing process. This study presents a straightforward method for creating a stable, recyclable, hybrid ionic-electronic conductive (HIEC) hydrogel via a simple one-pot strategy using polyvinyl alcohol (PVA), bagasse cellulose nanofibrils (CNF), and graphene(G) with sodium dodecylbenzene sulfonate (SDBS). The SDBS/G hemimicelles are formed through hydrophobic and π-π stacking interactions between SDBS and G, enhancing the dispersibility of G. Then SDBS/G hemimicelles were integrated into a non-covalent cross-linking network from CNF and PVA, which ensures recyclability and stability. The CNF-PVA-Graphene (CPG) hydrogel exhibited high and stable sensing sensitivity (average gauge factor up to 1.99), high conductivity (0.36 S/m), low graphene concentration (0.16 wt %), low detection limit (1 %), and fast response time (0.17 s). The sensor can detect large (wrist and knee) and small (pulse and laryngeal prominence) body movements. After recycling, the hydrogel sensors maintained high conductivity sensitivity (average gauge factor up to 1.01) and good tensile properties (360 % strain). This study introduces a new approach of hybrid conductive biomass-based hydrogel sensors for precisely monitoring human movements.
研究领域:
材料科学
·
生物医学工程
✓ 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）