ANALYST
·
2020
·Vol. 145
·期 9
·3407-3413
·
IF 3.978
Jiaying Zhang,Xiangyu Feng,Jing Wang,Guozhen Fang,Jifeng Liu,Shuo Wang
A new core–shell structured nanomaterial based on Fe3O4 nanoparticles and 2,3-dialdehyde nanocrystalline cellulose (DAC) coating and its high efficiency in the preconcentration of glycoproteins were described in this work. DAC was obtained after the periodate oxidation of nanocrystalline cellulose to form aldehyde groups; then, Fe3O4 nanoparticles were coated with DAC, which were further attached to 4-aminophenylboronic acid (PBA) to form PBA-functionalized magnetic core–shell structured materials (Fe3O4@DAC–PBA). The oxidation of cellulose and the production of sufficient amounts of aldehyde group sites were essential for the preparation of Fe3O4@DAC-PBA used for the affinity adsorption of glycoproteins because the aldehyde groups on DAC allowed DAC to attach to the Fe3O4 nanoparticles and bind with PBA, which was active in forming a complex with the glyco sites in glycoproteins. Moreover, the preconcentration properties of Fe3O4@DAC-PBA through PBA adsorption can be pH-triggered without the disassembly of the structures; thus, the developed Fe3O4@DAC–PBA can be efficiently prepared to provide a promising affinity material for the affinity adsorption and purification of glycoproteins.
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高影响因子
ULTRASONICS SONOCHEMISTRY
·
2017
·
IF 4.218
Xiaojie Yu,Xinjie Bao,Cunshan Zhou,Lei Zhang,Abu El-Gasim A. Yagoub,Hongpeng Yang,Haile Ma
The purpose of this paper was to investigate the effect of ultrasound-ionic liquid (IL) pretreatment on the enzymatic and acid hydrolysis of the sugarcane bagasse and wheat straw. The lignocellulosic biomass was dissociated in ILs ([Bmim]Cl and [Bmim]AOC) aided by ultrasound waves. Sonication was performed at different frequencies (20, 28, 35, 40, and 50 kHz), a power of 100 W, a time of 30 min and a temperature of 80 °C. The changes in the structure and crystallinity of the cellulose were studied by Fourier transform infrared (FT-IR), X-ray diffraction (XRD) and thermal gravimetric analysis (TGA). The amounts of the total reducing sugars, glucose, cellobiose, xylose and arabinose in the hydrolysates were determined. The results of FT-IR, XRD and TGA revealed that the structure of cellulose of both biomass samples remained intact after the pretreatment, but the crystallinity decreased. The enzymatic and acid hydrolysis of the biomass samples pretreated with the ultrasound-IL result in higher yields of the reducing sugars compared with the IL-pretreated sample. Enzymatic hydrolysis of bagasse and wheat straw pretreated with [Bmim]Cl-ultrasound resulted in maximal yields of glucose at 20 kHz (40.32% and 53.17%) and acid hydrolysis resulted in maximal yields of glucose at 40 kHz (33.32% and 48.07%). Enzymatic hydrolysis of bagasse and wheat straw pretreated with [Bmim]OAc-ultrasound show maximal yields of glucose at 28 kHz and acid hydrolysis at 50 kHz. Combination of ultrasound with [Bmim]OAc is more effective than [Bmim]Cl in terms of the yields of reducing sugar.
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高影响因子
Materials
·
2020
·Vol. 13
·期 7
·1624
·
IF 3.057
Lili Qin,Xinyu Zhao,Yiwei He,Hongqiang Wang,Hanjing Wei,Qiong Zhu,Ting Zhang,Yao Qin,Ai Du
Resveratrol is a natural active ingredient found in plants, which is a polyphenolic compound and has a variety of pharmaceutical uses. Resveratrol-loaded TEMPO-oxidized cellulose aerogel (RLTA) was prepared using a freeze-drying method, employing high speed homogenization followed by rapid freezing with liquid nitrogen. RLTAs were designed at varying drug–cellulose aerogel ratios (1:2, 2:3, 3:2, and 2:1). It could be seen via scanning electron microscopy (SEM) that Res integrated into TEMPO-oxidized cellulose (TC) at different ratios, which changed its aggregation state and turned it into a short rod-like structure. Fourier transform infrared (FTIR) spectra confirmed that the RLTAs had the characteristic peaks of TC and Res. In addition, X-ray diffraction (XRD) demonstrated that the grain size of RLTA was obviously smaller than that of pure Res. RLTAs also had excellent stability in both simulated gastric fluid and phosphate buffer solution. The drug release rate was initially completed within 5 h under a loading rate of 30.7 wt%. The results of an MTT assay showed the low toxicity and good biocompatibility of the RLTAs. TC aerogel could be a promising drug carrier that may be widely used in designing and preparing novel biomedicine.Keywords:TEMPO-oxidized cellulose;aerogel;resveratrol;drug carrier
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高影响因子
BIORESOURCE TECHNOLOGY
·
2018
·
IF 5.807
Zengyong Li,Ying Liu,Chuanfu Liu,Shubin Wu,Weiqi Wei
The conversion of cellulose into sorbitol has been recognized as one of most promising biomass valorization routes for the production of high added-value chemicals. In this work, Sulfonic acid-functionalized carbonized cassava dregs supported ruthenium bifunctional catalyst (Ru/CCD-SO 3 H) was prepared. The Ru/CCD-SO 3 H catalyst was employed for direct conversion of cellulose into sorbitol in a neutral aqueous solution. A sorbitol yield of 63.8% could be obtained at 180 °C for 10 h. The acidic sites and metal hydrogenation sites of the Ru/CCD-SO 3 H catalyst played an important role in hydrolytic hydrogenation of cellulose. Particularly, there presented a strong synergistic effect between sulfonic groups and Ru nanoparticles in conversion of cellulose into sorbitol. This synergistic effect was favorable to enhancing the sorbitol yield. Besides, the stability of Ru/CCD-SO 3 H catalyst was investigated under the optimal reaction conditions. The catalytic performance of catalyst was decreased after being used five times.
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高影响因子
GREEN CHEMISTRY
·
2022
·Vol. 24
·期 19
·7519-7530
·
IF 11.034
Penghao Sun,Siheng Wang,Zhen Huang,Lei Zhang,Fuhao Dong,Xu Xu,He Liu
Petroleum-based plastics are useful, but they pose a huge threat to the environment and human health. The development of sustainable cellulose paper materials with excellent mechanical and water-resistance properties to replace plastics is highly desirable but also challenging. Herein, we report a new kind of rosin-based modifier synthesized from fully hydrogenated rosin and (3-glycidoxypropyl)triethoxysilane, which can covalently bind with cellulose fiber networks to improve the hydrophobicity and weaken the capillarity of cellulose paper. The rosin-grafted cellulose composite paper shows a unique combination of water resistance (water absorption of 19.2% and 37.9% in 25 and 90 °C water, respectively) and high strength (tensile strength of 47.9 MPa and Young's modulus of 2.32 GPa). Moreover, the rosin-grafted cellulose composite paper can be completely degraded when buried in soil for up to 100 days, and it can be recycled when treated with an alkali. These impressive performances make rosin-grafted cellulose composite paper a promising eco-friendly alternative material to replace plastics in straws, boxes, cups, bags and so on.
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高影响因子
CHINESE JOURNAL OF POLYMER SCIENCE
·
2020
·Vol. 38
·期 9
·921-931
·
IF 3.154
Che Kun-Ming,Zhang Ming-Zu,He Jin-Lin,Ni Pei-Hong
The structure and properties of functional nanoparticles are important for stabilizing Pickering emulsion polymerization. Recently, cellulose nanocrystals (CNCs) are increasingly favored as a bio-based stabilizer for Pickering emulsions. In this study, we reported a novel functionalized polyphosphoester-grafted CNCs for the stabilization of oil-in-water Pickering emulsions and the emulsion polymerization of styrene. First, polyphosphoester containing an amino group at one end of the chain, abbreviated as PBYP-NH 2 , was prepared by ring-opening polymerization (ROP) and hydrolysis reaction, wherein PBYP represents poly[2-(but-3-yn-1-yloxy)-2-oxo-1,3,2-dioxaphospholane]. Subsequently, CNC-COOH was obtained via 2,2,6,6-tetramethylpiperidine-1-oxyl (TEMPO) oxidation of CNCs. The functionalized nanocrystals CNC-PBYP-COOH with carboxyl groups and polyphosphoester on the surface were obtained by the amidation reaction of PBYP-NH 2 with CNC-COOH. Finally, we used CNC-PBYP-COOH as sole particle emulsifiers to stabilize styrene-in-water Pickering emulsions and studied its effects on the emulsions in details by using dynamic light scattering (DLS). The results indicated that the properties of these emulsions depended on the concentration of hydrophobically modified CNCs, volume ratios of oil to water, and pH values. The modified CNCs had higher ability to stabilize the styrene-in-water emulsions relative to the unmodified CNCs, and a stable oil-in-water (o/w) Pickering emulsion with diameter of hundreds of nanometers could be obtained. The resulting emulsions could be polymerized to yield nanosized latexes. The polyphosphoester-modified CNCs as green particle emulsifiers can efficiently stabilize nanoemulsions and latexes, which would promote the development of novel environmentally friendly materials.
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高影响因子
ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Han Wang,Rongrong Shao,Xiao Meng,Yisheng He,Zhaojie Shi,Zhen Guo,Chunhong Ye
Birefringence has been attracting broad attention due to its strong potential for applications in biomedicine and optics, such as biomedical diagnosis, colorimetric sensing, retardant, and polarization encoding. However, engineering architectures with precisely controllable birefringence remains a challenge due to the lack of effective modulation of the localized orientation. Here, by taking advantage of the inherently one-dimensional (1D) anisotropic structure of cellulose nanocrystals (CNCs), we demonstrate an approach to tune the alignment of CNCs with a well-controllable orientation at localized preciseness, which is in contrast to the previously reported unidirectional/radical orientation of CNC-based birefringent structures. The localized modulation of CNC orientation is facilitated by directing the 1D nanocrystals to align along the template periphery and the migrated three-phase contact line during the evaporation. The resultant CNC films exhibit birefringent extinction patterns under polarized light, in which versatile pattern designs can be obtained by employing templates with different shapes and template arrays with varied layouts. Due to the locally modulated orientation of CNCs, the films indicate “kaleidoscope-like” dynamically transformable designs of the birefringent patterns depending on the polarized angle, which has barely been observed previously. Furthermore, an N-nary encoding system for abundant information storage is demonstrated based on the sunlight-transparent CNC films, but with visible extinction patterns under polarized light, which is promising for encryptions, anticounterfeiting, and imaging, enriching the attractive research area of bio-based photonics.
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高影响因子
BIOMACROMOLECULES
·
2019
·
IF 5.667
Ruiping Tong,Guangxue Chen,Danhong Pan,Haisong Qi,Ren’ai Li,Junfei Tian,Fachuang Lu,Minghui He
Stretchable and compressible hydrogels based on natural polymers have received immense considerations for electronics. The feasibility of using pure natural polymer-based hydrogels could be improved if their mechanical behaviors satisfy the requirements of practical applications. Herein, we report highly stretchable (tensile strain ∼126%) and compressible (compression strain ∼80%) cellulose ionic hydrogels (CIHs) among pure natural polymer-based hydrogels including cellulose, chitin, and chitosan via chemical cross-linking based on free radical polymerization of allyl cellulose in NaOH/urea aqueous solution. In addition, the hydrogels have good transparency (transmittance of ∼89% at 550 nm) and ionic conductivity (∼0.16 mS cm–1) and can be worked at −20 °C without freezing and visual loss of transparency. Moreover, the CIHs can serve as reliable and stable strain sensors and have been successfully used to monitor human activities. Significantly, the various properties of hydrogel can be controlled through rationally adjusting the chemically cross-linked density. Our methodology will prove useful in developing the satisfied mechanical and transparent CIHs for a myriad of applications in flexible electronics.
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高影响因子
Membranes
·
2021
·Vol. 12
·期 1
·42
·
IF 4.106
Xin Huang,Feng Tian,Guohong Chen,Fanan Wang,Rengui Weng,Beidou Xi
It is of great significance to search for efficient, renewable, biodegradable and economical membrane materials. Herein, we developed an organic-inorganic hybrid regenerated cellulose membrane (ZrO2/BCM) with excellent hydrophilic and anti-fouling properties. The membrane was prepared by introducing ZrO2particles into an N-Methylmorpholine-N-oxide(NMMO)/bamboo cellulose(BC) solution system by the phase inversion method. The physi-chemical structure of the membranes were characterized based on thermal gravimetric analysis (TGA), Fourier transform infrared spectroscopy (ATR-FTIR), field emission scanning electron microscopy (FE-SEM), and X-ray diffraction (XRD). The modified regenerated cellulose membrane has the excellent rejection of bovine serum albumin (BSA) and anti-fouling performance. The membrane flux of ZrO2/BCM is 321.49 (L/m2·h), and the rejection rate of BSA is 91.2%. Moreover, the membrane flux recovery rate after cleaning with deionized water was 90.6%. This new type of separation membrane prepared with green materials holds broad application potential in water purification and wastewater treatment.
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高影响因子
CARBOHYDRATE POLYMERS
·
2018
·
IF 5.158
Pengfeng Luo,Liangling Liu,Wenyan Xu,Lihong Fan,Min Nie
Hydrogel wound dressing is a new type of biomaterial with great absorbent capacity, which has been extensively researched and its application in the field of biomedicine is common. In this study, we prepared a novel composite hydrogel made of hyaluronic acid (HA) and hydroxyethyl cellulose (HEC), both of them are natural polysaccharides . Then, the structure and properties of this composite hydrogel were characterized and tested. The results gained from these studies show that this composite materials have a series of excellent performance such as appropriate gelation time, good swelling ability, suitable water evaporation rate, well hemocompatibility and biological compatibility. In particular, the super absorbent capacity (the maximum swelling rate is 2888%), which is conducive to maintain a moist wound healing environment. Taking account of these properties, this hydrogel can be used clinically as a wound dressing.
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高影响因子
GREEN CHEMISTRY
·
2016
·Vol. 18
·期 23
·6246-6254
·
IF 8.506
Yan-Rong Liu,Kaj Thomsen,Yi Nie,Suo-Jiang Zhang,Anne S. Meyer
In this work, 357 ionic liquids (ILs) formed from 17 cations and 21 anions were selected for evaluation of their ability to dissolve cellulose by COSMO-RS. In order to evaluate the predictive model and method, experimental measurements of the solubility of microcrystalline cellulose (MCC) in 7 of these ILs were also conducted. Predicted results from logarithmic activity coefficients were generally in good agreement with the experimental results. Three different models were used for describing cellulose, and the mid-monomer part of the cellotriose model was found to be closer to the experimental results than a neat glucose model and the model of the mid-dimer part of cellotetraose. Excess enthalpy calculations indicated that hydrogen-bond (H-bond) interactions between cellulose (i.e. the three cellulose models) and the 7 studied ILs are key factors for the solubility of cellulose, and the anions play a crucial role in the cellulose dissolution process. Importantly, the cations of methylimidazolium+, pyridinium+, ethylmorpholinium+ and methylpyrrolidinium+ structured with functional groups including ethyl, allyl, 2-hydroxylethyl, 2-methoxyethyl and acryloyloxypropyl, combined with anions Ac−, Dec−, HCOO−, Cl−, BEN−, DMPO4−, DEP−, DBP− and Br− were predicted to be the best for dissolving cellulose.
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高影响因子
CELLULOSE
·
2018
·Vol. 26
·期 2
·1195-1208
·
IF 3.809
Song Peng,Shen XiaoPing,He XiaoMei,Feng KaiHui,Kong LiRong,Ji ZhenYuan,Zhai LinZhi,Zhu GuoXing,Zhang DongYang
Abstract Heteroatom-doped porous carbon materials are one of the most promising electrodes for high-performance supercapacitors. However, the development of a simple, green and low-cost strategy for their preparation is still highly challenging. In this study, we reported a simple and sustainable preparation of nitrogen-doped hierarchically porous carbon (NHPC) by using cellulose as raw materials. A NaOH/urea (7:12) system acted as the solvent, activator, and dopant simultaneously. The resultant NHPC has a high BET specific surface area of 2245 m 2 g −1 , a typically porous architecture comprising of micro-, meso-, and macropores with an appropriate average pore size of 2.83 nm, as well as a suitable nitrogen-doping degree of 3 wt%. The unique features of NHPC afford an outstanding specific capacitance of 300 F g −1 at 0.5 A g −1 , representing a new capacitive record among the cellulose-derived carbon electrodes reported so far. The NHPC//NHPC supercapacitor cell displays a high energy density of 17.2 Wh kg −1 at 452 W kg −1 , and maintains 12.1 Wh kg −1 at 4500 W kg −1 . High rate capability (81% of capacitance retention from 0.5 to 10 A g −1 ) and excellent cycling stability (5% loss after 10,000 cycles) have been also demonstrated. The facile and affordable synthesis route together with outstanding energy storage behavior endows the cellulose-derived NHPC with promising application for supercapacitors.
Graphical abstract
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高影响因子
危险品化学品经营许可证（带存储）