Nanomaterials
·
2023
·Vol. 13
·期 24
·3151
·
IF 5.3
Hao Xu,Zhu-Xiang Gong,Li-Zhu Huo,Chao-Fei Guo,Xue-Juan Yang,Yu-Xuan Wang,Xi-Ping Luo
Cellulose-based carbon (CBC) is widely known for its porous structure and high specific surface area and is liable to adsorb gas molecules and macromolecular pollutants. However, the application of CBC in gas sensing has been little studied. In this paper, a ZnO/CBC heterojunction was formed by means of simple co-precipitation and high-temperature carbonization. As a new ammonia sensor, the prepared ZnO/CBC sensor can detect ammonia that the previous pure ZnO ammonia sensor cannot at room temperature. It has a great gas sensing response, stability, and selectivity to an ammonia concentration of 200 ppm. This study provides a new idea for the design and synthesis of biomass carbon–metal oxide composites.Keywords:gas sensor;ammonia;zinc oxide;microcrystalline cellulose
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2023
·
IF 8.2
Menglei Yan,Weifei Wang,Qingqing Xu,Qian Zou,Wen Chen,Dongming Lan,Yonghua Wang
The existing oil oxidation detection methods are unsuitable for consumers to identify oil oxidation in a domestic setting. This study aims to develop indicator films detecting the degree of lipid oxidation with the naked eye. Purple sweet potato pigment (PSP) was chosen as a color indicator due to its response to hydrogen peroxide. The novel oxidation indicator films were prepared using corn starch, carboxymethyl cellulose (CMC), and varying concentrations of PSP. Fourier transform infrared spectroscopy spectra and scanning electron microscopy analysis confirmed the successful dispersion of PSP in the films. Thermal stability , light resistance, ultraviolet light resistance, mechanical resistance, and flexibility of films containing PSP were improved, enhancing the potential application in detecting oxidized substances. All the films exhibited noticeable color changes when exposed to different concentrations of hydrogen peroxide. These differences were more pronounced with higher levels of PSP. When these films were used to determine the degree of lipid oxidation, the ∆E value of the CS-PSP-0.25 % film showed a linear relationship (R 2 = 0.929) with the peroxide value, unlike other films. Therefore, it is reliable to infer the peroxide value of edible oil by observing the color of the films, which helps customers avoid consuming expired oils.
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CELLULOSE
·
2023
·Vol. 30
·期 15
·9563-9574
·
IF 5.7
Wang Zhixin,E Yuyu,Li Jie,Du Tingting,Wang Kun,Yao Xi,Jiang Jianxin,Wang Meng,Yuan Shengguang
Bacterial cellulose (BC) aerogels with ultralight, low density, and low thermal conductivity are hopeful candidates for environmentally friendly heat insulating materials. However, the application of BC in packaging and building as a heat nonconductor is seriously limited by its flammable characteristics. Hence, we report a moderate approach to fabricating a flame retardant and heat-insulating composite aerogel by introducing zinc borate (ZnB) particles into BC via an ultrasound-assistant deposition process. The in situ synthesis of ZnB particles resulted in the separation of single fibers from fiber bundles in BC instead of damaging its homogeneous porous structure, improving its thermal stability by weakening the convective intensity of heat rays. The heat release capacity of the prepared composite aerogel was only 8 J g −1 k −1 , exhibiting excellent flame retardancy. The probable mechanism proposed to be that the dehydration of ZnB particles lowered the surface temperature by releasing the bound water, and simultaneously produced metallic oxides (ZnO and B 2 O 3 ) for retarding the spread of heat and isolating the flammable fibrils within the combustion area. Besides above scientifical meaning on understanding the thermal insulation process, because of the natural and renewable substrate and the following simple modification process, the present approach has potential applications for industrial-scale production of green and flame retardant material.
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INDUSTRIAL CROPS AND PRODUCTS
·
2023
·
IF 5.9
Jiafeng Yuan,Guanben Du,Hongxing Yang,Sichen Liu,Seongsu Park,Tongda Liu,Xin Ran,Byung‑Dae Park,Wei Gao,Long Yang
Herein, lignin was functionalized to obtain quinonoid lignin (QL) and epoxidized lignin (EL), and cellulose was modified to be aminated cellulose (AC). A novel fully bio-based adhesive of QL-AC-EL with multiple cross-linked networks was designed based on Schiff base and addition reaction. Furthermore, the natural wood interface was activated by brushing aqueous solution of 3-aminopropyltriethoxysilane (APTES) to obtain a functional interface with many -NH 2 groups. Finally, the created QL-AC-EL was used as a specific adhesive to glue wood interface with abundant -NH 2 groups. The bonding performance was evaluated that the dry strength of the plywood specimens made from activated wood interface was 3.2 MPa, which increased by 123.8% than that of natural wood interface. It is amazing that the wet strength of plywood by using activated wood interface was 1.73 MPa, whereas wet bonding strength of natural wood was zero. The significantly improvement of the bonding properties should be caused by the covalent crosslinking between adhesive and activated wood interface, which plays an important role in the enhanced water resistance of the interfacial bonding stability. This work provided a new inspiration for the design of bio-based adhesives with excellent performance and water resistance from the interfacial chemical bonding perspective.
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APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Yucheng Hu,Meixue Gan,Yimin Xie,Yingsong Yu,Qinghua Feng
Sustainable and biodegradable products processed from natural biomass offer promising replacement alternatives for nondegradable petrochemical-based plastics. While, the poor water tolerance of biomass is typically insufficient for practical use in applications, such as packaging. This study proposes a simple strategy to imitate the lotus leaf structure. Precision imprinting is performed to construct surface microstructure with simple templates, followed by in situ grafting of low-surface-energy nanoparticles onto the micro-architecture of the cellulose composite film surface. The resulting biometric superhydrophobic cellulosic composite (BSCC) exhibits both stable superhydrophobicity and excellent optical performance (anti-counterfeiting, high transparency (approximately 87%), and high haze (approximately 75%)) owing to the designed microstructure. The BSCC exhibits good self-cleaning behavior, and high tensile strength (>91.4 MPa), and is biodegradable in soil within 87 d. Importantly, this work demonstrates a simple approach to engineering and enhancing cellulose-based materials with superhydrophobicity and tunable optical performance to be able to replace petrochemical plastics.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2023
·
IF 8.2
Yujiao Lin,Qingqing Wang,Yuhui Huang,Jian Du,Yi Cheng,Jie Lu,Yehan Tao,Haisong Wang
Water pollution remains a serious problem for aquatic organism and human beings. Developing an efficient material which can simultaneously remove and convert pollutants into low or no harmful compounds is an essential issue. Targeting at this goal, a multifunctional and amphoteric wastewater treatment material of Co-MOF and functionalized cellulose-based composite (CMC/SA/PEI/ZIF-67) was designed and prepared. Carboxymethyl cellulose (CMC) and sodium alginate (SA) were selected as support to construct an interpenetrating network structure and made it crosslinked with polyethyleneimine (PEI) for further in situ growth of ZIF-67 with good dispersion. The material was characterized using an appropriate set of spectroscopic and analytical techniques. When applied in the adsorption of heavy metal oxyanions with no adjustment of pH, the adsorbent could completely decontaminate Cr(VI) at both low and high initial concentrations with good reduction rates. The adsorbent maintained good reusability after five cycles. Meanwhile, the cobalt species of CMC/SA/PEI/ZIF-67 can activate peroxymonosulfate to generate high oxidizing substances (such as SO 4 ˉ · and ·OH ˉ radicals) to degrade cationic rhodamine B dye within 120 min, thus indicating the amphoteric and catalytic nature of our CMC/SA/PEI/ZIF-67 adsorbent. The mechanism of the adsorption and catalytic process was also discussed based with the assistance of different characterization analysis.
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MACROMOLECULAR RAPID COMMUNICATIONS
·
2023
·Vol. 44
·期 17
·2300175
·
IF 4.6
Junmeng Zhao,Wenjiao Ge,Jianbo Shuai,Xiangli Gao,Fengshan Zhang,Xiaohui Wang
Cellulose is a promising feedstock for the production of sustainable materials. To fully utilize its potential, exploring efficient cellulose solvents is a paramount prerequisite. In this study, ten superbase amino acid ionic liquids (SAAILs) are synthesized using 1,5-diazabicyclo[4.3.0]non-5-ene (DBN) and 1,8-diazabicyclo[5.4.0]undec-7-ene (DBU) with different amino acid anions via a simple neutralization method. The properties of these SAAILs, such as viscosity and glass transition temperature, varied with their cation and anion structures. The ability of the SAAILs to dissolve cellulose is related to their Kamlet–Taft parameters, particularly hydrogen bond basicity ( β ). The main driving force for cellulose dissolution in SAAILs is thought to be hydrogen bonding interactions between SAAILs and cellulose hydroxyl groups. Four SAAILs composed of DBN or DBU cations and proline, or aspartic acid anions are identified as promising solvents for preparing regenerated cellulose films (RCFs). The RCF prepared from [DBN]Proline(Pro) showed a favorable combination of high tensile strength (76.9 MPa), high Young's modulus (5201.2 MPa), good transparency (≈70% at 550 nm), and smooth surface morphology. These halogen- and metal-free SAAILs show the potential to provide a new avenue for cellulose processing.
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ACS Sustainable Chemistry & Engineering
·
2023
·
IF 8.4
Li Yan,Xugang Dang,Mao Yang,Wenjia Han,Yanchun Li
Carboxymethyl cellulose (CMC) has potential applications in food packaging given its good processibility and biological properties. In this research, dialdehyde carboxymethyl cellulose (DCMC) was first modified with polyamidoamine (PAMAM G0) to synthesize hyperbranched dialdehyde carboxymethyl cellulose (HPD). Then, a novel hyperbranched dialdehyde carboxymethyl cellulose-grafted gelatin (HPD/Gs) film was obtained by the “one-pot” method. The structural characteristics, degree of cross-linking, thickness, swelling behavior, water solubility, water vapor permeability, surface morphology, hydrophilicity, mechanical strength, antibacterial properties, and biocompatibility of HPD/Gs were characterized by using Fourier transform infrared (FTIR), scanning electron microscopy energy-dispersive X-ray spectroscopy (SEM-EDS), X-ray diffractometry (XRD), thermogravimetric analysis/derivative thermogravimetry (TGA/DTG), differential scanning calorimetry (DSC), and other analysis technologies. The results revealed that the prepared HPD/Gs film showed good thermal stability and mechanical properties. In particular, when the mass ratio of HPD to G was 1:1.5, the cross-linking degree, swelling behaviors, water vapor permeability (WVP), water contact angle, tensile strength, and elongation at break of the HPD/1.5G film reached 42.757%, 109.114%, 46.71 g·mm/m2·day·kPa (1 day), 115.4 ± 4.5°, 1.77 MPa, and 320.93%, respectively. Moreover, the HPD/Gs films had good cytocompatibility and antibacterial properties against Staphylococcus aureus and Escherichia coli. The research indicated that the designed HPD/Gs are a type of green antimicrobial material with potential value.
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CELLULOSE
·
2023
·Vol. 30
·期 10
·6507-6521
·
IF 5.7
Fan Lingling,Zheng Wenfeng,Yang Yuan,Sun Yan,Peng Songlin,Xu Jie,Yin Guangfu
Bacterial cellulose (BC)/polypyrrole (PPy) nanofibrous composites have been extensively studied in supercapacitors owing to their large specific surface area and excellent tensile strength. However, the inferior cycling stability due to structural pulverization of PPy impedes their potential applications. Herein, nanofibrous composite membranes of MXene, PPy and oxidized BC (TOBC) were prepared for flexible supercapacitor electrodes. The C6 primary hydroxyl groups of BC nanofibers were oxidized into aldehyde or carboxyl groups. Due to the enhanced interaction of TOBC with PPy and MXene, the TOBC nanofibers were horizontally wrapped on the MXene nanosheets and PPy was homogeneously deposited on the TOBC nanofibers. The flexible solid-state supercapacitors fabricated with the MXene@TOBC@PPy (TMP) electrodes achieved an areal specific capacitance of 928.9 mF cm −2 at 0.7 mA cm −2 and a capacitance retention of 85.5% after 5000 cycles. Therefore, the TMP electrodes could be a promising electrode material for flexible supercapacitors.
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NEW JOURNAL OF CHEMISTRY
·
2023
·Vol. 47
·期 29
·13831-13840
·
IF 3.3
Zhenzhao Chen,Guoqing Chen,Changshui Wang,Dai Chen,Qian Zhang,Longjun Jiang,Chunmei Zhang,Kunming Liu,Shuijian He
In this study, porous carbon nanofibers were produced via one-step carbonization and activation of cellulose acetate/polyacrylonitrile (CA/PAN) hybrid nanofibers using electrospinning. Zinc acetate effectively enhanced the thermal stability of CA without deacetylation and served as a template for pore creation. The effect of the mass ratio of CA to PAN on the microstructure and capacitive properties of the resulting carbon nanofiber membrane electrodes was investigated. All the membrane electrodes displayed self-supporting structures. The specific surface area, pore volume and specific capacitance of the membrane electrodes gradually increased with an increase in the CA : PAN mass ratio from 2 : 1 to 6 : 1, and then slightly decreased when the mass ratio reached 8 : 1. The CNF-C6P1 membrane electrode exhibited excellent flexibility, with a maximum specific surface area of ∼563.8 m2 g−1, largest specific capacitance of 132.2 F g−1 at 0.5 A g−1, and excellent rate capability of 53.3% at 20 A g−1. After 4000 cycles of the charge/discharge process in a two-electrode system, this membrane electrode could still retain 85.1% of the original specific capacitance and the coulombic efficiency was close to 100%, showing high electrochemical stability and reversibility. This work provides a simple and effective strategy for the design and synthesis of flexible electrode materials for supercapacitors from cellulose acetate.
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JOURNAL OF APPLIED POLYMER SCIENCE
·
2023
·Vol. 140
·期 33
·e54268
·
IF 3
Shoucun Zhang,Yujing Bian,Xueyin Yan,Guoli Fang,Shengwei Guo
The separation of the proteins is of great theoretical and practical importance for biotechnological application. Considering the requirement of non-destructive separation, the stimulus–response method is an alternative to the separation of protein. In this work, a cellulose-based composite with CO 2 stimulus–response property is prepared by a simple coprecipitation of poly ( N , N ˊ-diethylamino ethyl methacrylate)- co -poly (hydroxyethyl methacrylate) (PDH) and cellulose mixture solution. Subsequently, these composites as the adsorption medium are used to separate the bovine serum albumin (BSA, as the model protein) from solution through stimulus–response course (by CO 2 /N 2 alternation). The results indicate that the ratio of the copolymers/cellulose composite have an obvious effect on the separation of BSA. The average maximum adsorption capacity can get to 562.6 mg/g, and the composites exhibits good adsorption/desorption cycling characteristics. After the composite materials are cycled for three times, the adsorption capacity can still decrease to 300 mg/g. Due to its high adsorption capacity and low preparation cost, the composite is expected to be widely used in industry.
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FOOD HYDROCOLLOIDS
·
2023
·
IF 10.7
Shuo Shi,Xiaowei Xu,Yanming Ren,Hao Zhang,Xin Du,Haijing Li,Xiufang Xia
This study investigates the waterproof layer formed by beeswax (BW) to improve the hydrophobicity of sodium alginate/black soybean seed coat anthocyanin/cellulose nanocrystal indicator films. The concentrations of BW and the fabrication method of the waterproof layer, including spraying, coating (CO), and soaking, were optimized. The results showed that the optimal concentration of BW in the waterproof layer was 5% owing to its high water contact angle of 111.5°. Different methods of fabricating waterproof layers with BW led to the formation of particles of different sizes on the microscopic film surface. Hydrophobic films with a waterproof layer of BW-CO had high transmittance and pH sensitivity, ensuring the basic properties of indicator films. Meanwhile, they exhibited excellent water barrier properties based on the water contact angle, water vapor adsorption, water vapor permeability, water content and water solubility. In particular, these films remained highly hydrophobic after 10 days of storage at 100% humidity, with a water contact angle of 108.3°. The findings indicated that hydrophobic sodium alginate/black soybean seed coat anthocyanin/cellulose nanocrystal indicator films were prepared using BW, which improved their potential application in intelligent food packaging.
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