AUSTRALIAN JOURNAL OF CHEMISTRY
·
2017
·Vol. 71
·期 1
·74-79
·
IF 1.267
Xueying Sheng,Xian Li,Mengting Li,Renyi Zhang,Shuang Deng,Wangkai Yang,Guanjun Chang,Xu Ye
A series of injectable hydrogels was prepared by cross-linking oxidized carboxymethyl cellulose (oxi-CMC) with polyacryloyl hydrazide (PAH) via a Schiff base reaction under physiological conditions. The hydrogels exhibited superior performance such as appropriate rheology properties, high swelling ratio, and low degradation rate. In phosphate buffer solution (PBS, pH 7.4) at 37°C, the swelling ratio of the hydrogels ranged from 19 to 28 after 7 h, the degradation percentage of the oxi-CMC6/PAH3 hydrogel was ~47 % after 20 days. Using bovine serum albumin (BSA) as a model protein drug, the results of in vitro drug release studies demonstrated that the sustained release of BSA could be cooperatively controlled through drug diffusion and hydrogel degradation in PBS (pH 7.4) at 37°C, and the cumulative release percentage of BSA from a drug-loaded oxi-CMC6/PAH3 hydrogel was ~88 % after 8 days. The results signified that oxi-CMC6/PAH3 hydrogel could be potentially applied in the fields of drug delivery vehicles, tissue engineering, and cell encapsulation materials.
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JOURNAL OF MATERIALS SCIENCE
·
2017
·Vol. 52
·期 14
·8455-8464
·
IF 2.599
Qin Jingjing,Chen Lang,Zhao Chenghui,Lin Qixiang,Chen Shaowei
A novel porous aerogel of cellulose nanofiber (CNF)/cationic water-soluble poly[9,9-bis[3′-( N,N -dimethy)- N -ethylammonium)propyl)-2,7-fluorene- alt -1,4-phenylene]dibromide (CPFD) is prepared by freeze drying. CNF can effectively prevent aggregation of the conjugated polymer CPFD backbones. The CNF/CPFD hybrid aerogel is use for the detection of nitroaromatic (NAC) vapors. Due to the porous structure, the CNF/CPFD hybrid aerogel possesses a large number of accessible cavities, which could be sufficiently large to allow the diffusion of NAC vapors into the aerogel. As a result, the CNF/CPFD aerogel sensor shows high sensitivity toward NAC vapors. For 120-s exposure, the fluorescence quenching efficiency of the CNF/CPFD aerogel sensor toward 2,4-dinitrotoluene vapor is up to 85.9%, which is much larger than that of the spin-cast CPFD film. Furthermore, the sensing performance of the CNF/CPFD hybrid aerogel is not heavily dependent on the thickness, and the sensing process of the CNF/CPFD aerogel sensor is reversible.
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JOURNAL OF MATERIALS SCIENCE
·
2017
·Vol. 52
·期 11
·6432-6441
·
IF 2.599
Ren Suxia,Zhang Xiuqiang,Dong Lili,Lei Tingzhou,Teng Zhaogang,Song Kunlin,Sun Xiuxuan,Wu Qinglin
Superparamagnetic nanorods consisting of cellulose nanocrystals (CNCs), ferrosoferric oxide (Fe 3 O 4 ), and surface-aminated silica (SiO 2 –NH 2 ) were synthesized for the first time for targeted biomedical applications (i.e., cell imaging). CNCs and Fe 3 O 4 were used as the template and magnetic property provider, respectively. The silica was functionized as magnetite core protector and rich amino group supplier. The synthesized nanorods exhibited a core–shell architecture (i.e., CNCs/Fe 3 O 4 core and aminated silica shell). Due to the coated silica shell, thermal stability of the nanorods was improved with the onset decomposition temperature increased by 135 °C compared with that of the uncoated CNCs. Because of the existence of the positively charged amino groups, the nanorods were easily linked with fluorescent dyes for cell imaging in biomedical applications.
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CARBOHYDRATE POLYMERS
·
2017
·
IF 4.811
Qiufang Yao,Bitao Fan,Ye Xiong,Chao Wang,Hanwei Wang,Chunde Jin,Qingfeng Sun
A self-reporting aerogel toward stress sensitive slectricity (SSE) was presented using an interconnected 3D fibrous network of Ag nanoparticles/cellulose nanofiber aerogel (Ag/CNF), which was prepared via combined routes of silver mirror reaction and ultrasonication. Sphere-like Ag nanoparticles (AgNPs) with mean diameter of 74 nm were tightly anchored in the cellulose nanofiber through by the coherent interfaces as the conductive materials. The as-prepared Ag/CNF as a self-reporting material for SSE not only possessed quick response and sensitivity, but also be easily recovered after 100th compressive cycles without plastic deformation or degradation in compressive strength. Consequently, Ag/CNF could play a viable role in self-reporting materials as a quick electric-stress responsive sensor.
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PubMed
高影响因子
CELLULOSE
·
2016
·Vol. 24
·期 1
·61-68
·
IF 3.195
Lin Xuliang,Cai Cheng,Lou Hongming,Qiu Xueqing,Pang Yuxia,Yang Dongjie
Effect of cationic surfactants alkyltrimethylammonium bromide (C n TAB) with varied alkyl chain lengths on the enzymatic hydrolysis of Avicel and the surface charge of cellulase was investigated. Enzymatic hydrolysis of Avicel increased linearly from 42.1 to 61.4 % with the increase of the concentration of cetyltrimethylammonium bromide (C 16 TAB) logarithmically from 0.0001 to 0.01 mM, and reached a maximum value at the concentration of 0.01–0.03 mM. When the concentration was increased further, the cellulase solution became positively charged and the enzymatic hydrolysis of Avicel decreased rapidly. With the increasing alkyl chain length, C n TAB provided more proton and neutralized the negative charge of cellulase more obviously. Therefore, the required concentration of C n TAB could be less to enhance the enzymatic hydrolysis of Avicel. In addition, C 16 TAB could enhance enzymatic hydrolysis efficiency of corncob at high solid content from 35.0 to 56.3 %; C 16 TAB could reduce about 60 % of the cellulase loading in the enzymatic hydrolysis of corncob to obtain the same glucose yield. Effect of C 16 TAB on the enzymatic hydrolysis of typical pretreated softwood and hardwood was also investigated. This study laid the foundation for using C n TAB to recover cellulase, and provided the design direction for cellulase with higher activity and better stability by adjusting its hydrophilicity and chargeability.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Tongjun Yang,Junpeng Xu,Hailiang Sheng,Junqin Wang,Gang Hu,Songmiao Liang,Lijie Hu,Lihua Zhang,Haibo Xie
The CO 2 -based reversible ionic liquid solution of 1,1,3,3-tetramethylguanidine (TMG) and ethylene glycol (EG) in dimethyl sulfoxide (DMSO) after capturing CO 2 , (2[TMGH] + [O 2 COCH 2 CH 2 OCO 2 ] 2− /DMSO ( χ RILs = 0.1), provides a sustainable and effective platform for cellulose dissolution and homogeneous utilization. Highly porous cellulose aerogel beads and monoliths were successfully prepared via a sol-gel process by extruding cellulose solution into different coagulation baths (NaOH aqueous solution or alcohols) and exposing the cellulose solution in open environment, respectively, and followed by different drying techniques, including supercritical CO 2 -drying, freeze-drying and air-drying. The effect of the coagulation baths and drying protocols on the multi-scale structure of the as-prepared cellulose aerogel beads and monoliths were studied in detail, and the sol-gel transition mechanism was also studied by the solvatochromic parameters determination. High specific surface area of 252 and 207 m 2 /g for aerogel beads and monoliths were achieved, respectively. The potential of cellulose aerogels in dye adsorption was demonstrated.
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PubMed
高影响因子
ChemistrySelect
·
2024
·Vol. 9
·期 43
·e202402801
·
IF 1.9
Yang Li,Zhongming Liu,Shoujuan Wang,Fangong Kong
Graphical Cellulose composite aerogel with a rich three-dimensional network structure, low density, and high porosity is successfully obtained by the in situ self-polymerization of dopamine and acrylamide in an alkaline urine system. Cellulose composite aerogel exhibits high adsorption capacities and recyclability for methylene blue dye, which is higher than those reported for other bio-based adsorbents. Cellulose-based “biomass” adsorptive materials have gained significant attention because of their effectiveness in various applications. In this study, a cellulose composite aerogel with a rich three-dimensional network structure, low density, and high porosity was successfully obtained by the in situ self-polymerization of dopamine (DA) and acrylamide (AM) in an alkaline urine system. Fourier transform infrared spectroscopy, scanning electron microscopy, X-ray photoelectron spectroscopy, elemental analysis, and other analytical techniques were used to analyze the physical and chemical structures of the cellulose composite aerogels. The results revealed that the introduction of DA and AM into the aerogel enhanced the adsorption and mechanical properties of the active sites, thereby boosting adsorption capacity and recyclability. By optimizing the adsorption of methylene blue (MB) dye using a cellulose composite aerogel, a maximum adsorption capacity of 406.89 mg g was obtained. The MB dye adsorption curve of the cellulose composite aerogel conformed to the Langmuir model, which indicates high adsorption capacity and recyclability. This confirms the high application potential of the cellulose composite aerogel in wastewater treatments.
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高影响因子
Journal of Energy Storage
·
2024
·
IF 8.9
Ying Kang,Weixiang Chen,Jianguo Huang
Vanadium-sulfides are considered as promising anodic materials for lithium-ion batteries (LIBs) due to their unique layered structures and high theoretical capacities. However, the main challenge of vanadium-sulfide as an electrode material is still faced with slow Li-ion diffusion kinetics and inevitable structural damage during charging/discharging processes. Herein, a series of bio-inspired hierarchical fibrous VS 4 /C composites were designed based on cellulose substance as the scaffold and carbon source via simple hydrothermal method. The resultant fibrous VS 4 /C composites possessed a three-dimensional porous network structure consisting of carbon fibers coated with VS 4 nanosheets. As a consequence, the optimized VS 4 /C anodic materials exhibit high reversible capacities (953 mAh g −1 at 0.1 A g −1 ), good rate features (420 mAh g −1 at 2 A g −1 ), and fast diffusion kinetics. The superior electrochemical properties of the VS 4 /C composites are mainly attributed to the three-dimensional porous network structures combined with the carbon fibers matrix, which promotes the contact between the electrode and electrolyte, alleviates the structural damage of VS 4 , as well as facilitates the electron transfer and Li-ion diffusion during the cycling processes.
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ACS Applied Polymer Materials
·
2025
·
IF 4.7
Yueyue Zhu,Penghao Sun,Zhen Huang,He Liu,Xu Xu
The widespread use of plastics has caused serious environmental pollution, and the use of cellulose paper products to replace plastics has attracted worldwide attention. However, the rich hydroxyl groups and structure voids lead to poor barrier properties of cellulose paper products to water and oil. Herein, a rosin-based polymer coating (RB) is reported, which is prepared by cross-linking a rosin-modified silane coupling agent (RM) with hydroxyl-capped polydimethylsiloxane (OH-PDMS) and ethyl orthosilicate (TEOS). The RB can form a dense and uniform barrier layer on the surface of the cellulose paper product, so that the RB-coated paper (RB paper) exhibits excellent properties, including (1) water resistance (exhibiting a water contact angle of 102.3°, the relative water absorption rate decreased by over 90% at both 25 and 90 °C, reaching 35.1% and 45.9%, respectively), (2) oil resistance (Kit test reaches no. 10, and the relative oil absorption rate decreased by over 90% at both 25 and 90 °C, reaching 4.1% and 6.4%, respectively), and (3) high mechanical properties (tensile strength increased from 23.2 to 40.6 MPa, stronger than partly commercial plastics). Moreover, RB paper exhibits biodegradability and recyclability. These impressive performances position RB paper as a viable alternative to plastic.
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JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·
IF 2.7
Zheng Wang,Zhiwei Yang,Pengju Qiao,Jing Fang,Xingjiang Wu,Zhensheng Yang,Hao Li
Degradable polyvinyl alcohol (PVA) liquid mulch film is an effective alternative to traditional petroleum-based mulch. However, PVA has problems such as poor water resistance and high cost in practical applications. In this work, a liquid mulch film PCQ was prepared by simply blending quaternized lignin (QAL), carboxymethyl cellulose (CMC), and PVA. PCQ was characterized and analyzed through FT-IR, SEM, and other tests. The effects of QAL and CMC on the water resistance, barrier properties, water retention, soil-fixing properties, and degradation properties of PCQ were investigated. The results showed that the addition of QAL and CMC significantly enhanced the water resistance of the liquid mulch film and provided excellent UV shielding (90%) and water vapor shielding performance (249.3 g m −2 d −1 ). In addition, PCQ effectively immobilized topsoil, retained soil moisture, and improved seed germination. This study provides a new strategy for preparing environmentally friendly, low-cost, and degradable liquid mulch film.
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SOFT MATERIALS
·
2024
·
IF 1.6
Jing Wang,Shaopeng Lv,Xinchen Gui,Yadong Yu
Developing innovative packaging films is of great significance for extending the shelf-life of perishable fruit. In this study, we successfully synthesized antibacterial composites by incorporating Fe into reduced graphene oxides (rGO) and MoS2. The resulting rGO-MoS2-Fe2O3 composites demonstrated effective inhibition against E. coli and S. aureus. After investigating the antibacterial mechanism of rGO-MoS2-Fe2O3 composites, we utilized carboxymethyl cellulose (CMC) as a film substrate to create CMC films infused with rGO-MoS2-Fe2O3 composites. The incorporation of rGO-MoS2-Fe2O3 composites decreased the light transmittance and hygroscopicity of CMC films, while greatly enhancing the mechanical properties of CMC films. To evaluate the practical applications of these rGO-MoS2-Fe2O3-based CMC films, we conducted a strawberry preservation experiment, which revealed that CMC films supplemented with 5 wt% rGO-MoS2-Fe2O3 exhibited exceptional performance in preventing weight loss and maintaining total titratable acidity levels in strawberries. These findings highlighted the promising potential of rGO-MoS2-Fe2O3-based CMC films for fruit preservation applications.
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高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2024
·
IF 8.1
Bo He,Yunfei Lin,Qi Zhou,Shaokun Tang
Covalent organic framework (COF) nanosheets have been considered as promising materials for proton exchange membranes (PEM) due to their orderly, adjustable pores and relatively improved membrane forming properties. Here, we introduced the one-dimensional sulfonated bacterial cellulose nanofibers (SBCNF), originating from coconut and binding TpBd-2SO 3 H nanosheets to prepare a series of SBCNF/TpBd-2SO 3 H composite membranes . The composite membranes present a typical layered structure due to the presence of SBCNF. Moreover, extensive hydrogen bond network is formed between the embedded TpBd-2SO 3 H nanosheets and SBCNF, which is beneficial for improving the proton conductivity and mechanical strength of the membrane. As a result, the composite membrane achieved a proton conductivity of 147.5 mS/cm at 80 °C, 100 %RH and a highest tensile strength of 88.49 MPa.
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高影响因子
危险品化学品经营许可证（带存储）