JOURNAL OF APPLIED POLYMER SCIENCE
·
2015
·Vol. 133
·期 5
·
IF 1.768
Shiyong Xiao,Qizhong Xiong,Hongjian Zhou,Yunxia Zhang,Guozhong Wang,Haimin Zhang,Huijun Zhao
A simple and environmental friendly oxoacetohydrazide functionalization method is developed to convert the straw cellulose into high performance adsorbents for effective Pb(II) removal. The adsorption experimental results demonstrated that the resultant oxoacetohydrazide-modified cellulose (OMC) possesses a dramatically improved Pb(II) adsorption capacity (82.9 mg/g), which is over six times of that for the unmodified celluloses (13.6 mg/g). The mechanistic studies confirm that the markedly enhanced Pb(II) adsorption capability of OMC can be attributed to the formation of N-Pb-N bonds resulting from the strong chelating interactions of Pb(II) with oxoacetohydrazide. Also, the OMC shows an excellent reusability, capable of retain 95% of its original Pb(II) adsorption capacity after three consecutive adsorption cycles. The findings of this work pave a way to transform the agricultural byproducts into high performance functional materials. © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016 , 133 , 42950.
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
POLYMERS FOR ADVANCED TECHNOLOGIES
·
2015
·Vol. 26
·期 11
·1351-1355
·
IF 1.757
Deming Zeng,Jian Lv,Chun Wei,Chuanbai Yu
Sisal is a natural material and a potential additive to reinforce composites. In this paper, sisal fiber cellulose microcrystalline (SFCM) was obtained from sisal fiber, and SFCM/unsaturated polyester (SFCM/UPR) in-situ resins were prepared via in-situ polymerization. Moreover, SFCM/UPR composites were produced with methods of rolling and molding. Effect of SFCM on dynamic mechanical properties of composites was studied. It is demonstrated that SFCM could significantly improve the dynamic mechanical properties of composites; the effect is closely related with the amount of SFCM, its dispersion in UPR matrix, and interfacial interaction. When the content of SFCM was 3 wt%, at 50°C, the storage modulus of SFCM/UPR composite was 33.22% higher than that of pure UPR. In addition, the glass transition temperature (T g ) was shifted to a higher temperature by 7.5°C, and loss modulus was decreased by 16.24%. The equilibrium value of relaxation modulus at 120 min was 30.52% higher than that of pure UPR composite. Besides, the equilibrium value of creep strain at 120 min was decreased by 41.61% compared with pure UPR composite. Copyright © 2015 John Wiley & Sons, Ltd.
研究领域:
材料科学
·
高分子化学
✓ 已验证
产品关联
DOI
高影响因子
ADVANCES IN POLYMER TECHNOLOGY
·
2014
·Vol. 34
·期 2
·
IF 2.147
Jian Lv,Deming Zeng,Chun Wei
In this paper, sisal fiber cellulose microcrystal (SFCM) was prepared by the sulfate pulping method, and sisal fiber cellulose microcrystal/unsaturated polyester (SFCM/UP) in situ resin was polymerized. Furthermore, the SFCM/UP composite was prepared by rolling and molding techniques. Effects of SFCM content on mechanical and wear properties of the UP composites were studied. Structure and properties of the in situ SFCM/UP resin and its composites were characterized by using Fourier transform infrared, polarized optical microscopy, thermogravimetric analysis, scanning electron microscopy, and other methods. The results showed that the addition of SFCM by in situ polymerization significantly improves the thermal stability of UP: The decomposition temperature ( T d5 ) of SFCM/UP in situ resin, at thermal weight loss of 5%, is increased by 16°C compared to that of the pure UP resin. On a condition that the SFCM content was 2%, the impact strength, flexural strength, and flexural modulus of SFCM/UP composites are higher than those of UP composites by 41.08%, 52.52%, and 32.31%, respectively. Moreover, the addition of SFCM significantly enhances the wear properties of unsaturated polyester composite at 200°C; the volume wear rate of SFCM/UP composite is lower than that of UP composites by 64%, indicating SFCM could significantly strengthen and toughen UP composites.
研究领域:
材料科学
·
复合材料
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Yating Shi,Changmei Lin,Peiwei Deng,Leo N.Y. Cao,Weiguo Wang,Wanjing Li,Hezhi Lin,Yun Yang,Hao Wang,Meidan Ye,Zijie Xu,Shilin Cao,Wenxi Guo
As wearable devices in the fields of medical health, human–computer interaction, and motion detection continue to diversify in their materials and forms, they show vast application potential. Cellulose materials are emerging as prominent materials for fabricating flexible wearable electronic devices because of their favorable skin compatibility, cost-effectiveness, and abundance. However, there is little research on the use of kapok cellulose in wearable electronics. This study addresses this knowledge gap by exploring the high-yield production and waste recycling potential of kapok cellulose. To overcome the limitations of conventional cellulose films, such as poor flexibility, high haze, and limited light transmittance, a kapok cellulose nanofiber film (KCNF) with a transparency of > 90 % and a tensile strain of > 20 % is prepared. The use of the KCNF as a friction electric material in the triboelectric nanogenerator (TENG) improves its electrical output performance by 228 % and permits its comfortable long-term attachment to the skin for self-powered tactile sensing applications, including game control, text input, and smart medical devices. This study demonstrates that the exploration of KCNF materials expands the options available for developing wearable electronic devices with numerous potential applications.
研究领域:
材料科学
·
生物医学工程
·
电子工程
✓ 已验证
产品关联
DOI
高影响因子
Journal of Water Process Engineering
·
2025
·
IF 6.7
Dongzheng Wang,Guo Yang,Caiyi Jiang,Xingyong Liu,Bo Xing,Min Li,Yi Wang,Fuping Zhang,Xiaolin Shi,Qian Zhou
Polyvinylidene fluoride (PVDF) membrane in-situ coupling catalytic oxidation technology holds great promise as a means to mitigate membrane fouling. However, its application is constrained by several factors, including the inherent incompatibility with inorganic nanoparticles, unsatisfactory hydrophily, and limited catalytic capacity. In this study, a novel in-situ coupling Fenton membrane catalyst with high permeability and anti-fouling capacity was processed based on highly efficient FeNi-LDHs@Cellulose. The performance evaluation exhibit that pure water flux and TOC removal efficiency increased from 556.81 L·m −2 ·h −1 , 65.42% to 665.24 L·m −2 ·h −1 , 99.03 % while rate of Irreversible contamination (Rir) decreased from 42 % to 11.7 %, respectively. After 5 cycles, the pure water flux decreased from 665.24 L·m −2 ·h −1 to 471.13 L·m −2 ·h −1 , and the TOC removal efficiency and flux recovery rate (FRR) still remained above 90%. In addition, further mechanistic insights by pollution model, extended Derjaguin-Landau-VerweyOverbeek (XDLVO), Three-dimensional fluorescence (3D-EEM) and EPR verified that anti-fouling mainly attribute to high hydrophilicity and in-situ decomposition pollutants. Meanwhile, the decomposition mechanism of pollutants and generation path of OH and 1 O 2 were proposed. This research provides insights for further improving the permeability and anti-fouling performance of PVDF membrane in the field of treatment organic wastewater by combining organic with inorganic nanoparticles.
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
CATALYSIS LETTERS
·
2023
·
IF 2.8
Xu Lingling,Pan Xiaomei,Wu Ningxin,Gao Lijing,Xiao Guomin
The conversion of biomass energy sources is a crucial direction in the transformation of energy resources, such as cellulose to high-value chemicals. As an important platform compound, 5-hydroxymethylfurfural (HMF) is one of the worthwhile products from biomass. Previously, the use of Hf/ZSM-5 catalyst demonstrated excellent catalytic performance, with the yield of HMF reaching 67.50% under optimal reaction conditions (120 min, 190 °C, H 2 O(NaCl)/THF). Based on the previous work, the effect of a series of metal salts on the preparation of HMF from cellulose catalyzed by Hf/ZSM-5 catalyst was investigated in this paper. This result demonstrates the addition of AlCl 3 promoted the production of HMF yield and AlCl 3 completed with excellent performance among five metal salts. Moreover, the yield of HMF was improved to 70.95% by adjusting the optimal reaction conditions. Graphical Abstract
研究领域:
化学工程
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
ACS Omega
·
2020
·
IF 2.87
Yu Shi,Chang Liu,Jiankun Zhuo,Qiang Yao
Catalytic fast co-pyrolysis of biomass and plastic is an effective method to achieve high-quality bio-oil production. In this work, (Ni)-MCM-41 catalysts with different Ni loadings were prepared and characterized in detail by using a variety of advanced analytical techniques, and the effects on the catalytic performance were analyzed by micropyrolysis with gas chromatography mass spectrometry (Py-GC/MS) and thermogravimetry-Fourier transform infrared spectroscopy (TG-FTIR) methods. The results showed that an appropriate amount of Ni addition can effectively modulate the physicochemical properties of MCM-41. For a Ni loading of 25.1 wt % (Cat-C), the catalyst showed an optimal catalytic performance, a decrease in the proportion of oxygenated compounds in the product from 35.6 (MCM-41) to 13.4%, and an increase in the relative total amount of olefins plus aromatics from 62.2 (MCM-41) to 84.6%. The excellent catalytic performance of Cat-C can be ascribed to a balancing of its proper physical structural properties, appropriate acidity, strong metal–carrier interaction, high metal dispersion, and excellent compatibility balance between active and acidic sites.
研究领域:
化学工程
·
能源科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry A
·
2023
·Vol. 12
·期 3
·1617-1628
·
IF 11.9
Meng Ma,Wenqin Shao,Qindan Chu,Wenting Tao,Si Chen,Yanqin Shi,Huiwen He,Yulu Zhu,Xu Wang
With the strong support of the government for emerging technology industries, electromagnetic waves have brought convenience to people's lives, but also become an undeniable new source of pollution. Therefore, it is vital to develop new high-performance electromagnetic shielding materials. Herein, we designed a well-structured asymmetrical gradient multilayer composite film by constructing a controllable electromagnetic gradient. Using cellulose nanofibers as the matrix, a layer-by-layer filtration method was used to rationally distribute FeCo@rGO and MXene fillers to build an ordered multilayer structure that provides alternating conductive and magnetic gradients. Owing to gradient absorption shielding and reflection mechanisms for electromagnetic waves within the film layer, the EMI shielding efficiency (EMI SE) of the asymmetrical gradient alternating six-layer composite film reached 45.2 dB (X-band), and the reflection coefficient was reduced to 0.71 when 20 wt% filler was added. In addition, this composite film has good thermal conductivity and mechanical properties, exhibiting thermal conductivity of 2.90 W (m−1 K−1) and tensile strength of 26.2 MPa. This strategy provides a feasible approach for designing electromagnetic shielding composite materials with adjustable electromagnetic properties and has significant practical significance in expanding the application of MXene-based composite materials.
研究领域:
材料科学
·
电磁学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
IRANIAN POLYMER JOURNAL
·
2016
·Vol. 25
·期 5
·465-474
·
IF 1.684
Zhang Heng,Gao Xin,Chen Ke-Li,Liu Qi-Xing
Parenchyma cellulose, isolated from bagasse pith BP, was utilized as an alternative resource for preparation of soluble cellouronic acid sodium salt (SCA) by selective oxidation with the catalytic amounts of 4-acetamide-TEMPO and NaClO, in which NaClO 2 was used as a primary oxidant in an aqueous condition. The yield and carboxyl content of SCA were measured as a function of NaClO 2 content, 4-acetamide-TEMPO loading, oxidation temperature, initial pH, and reaction time, and optimized by an orthogonal test with the objective of achieving a maximum yield with high carboxyl content. An optimal SCA yield of 71.0 % with 32.92 % carboxyl content was found under the conditions of NaClO 2 dosage of 16 mmol/g, 4-acetamide-TEMPO loading of 0.20 mmol/g, and oxidation temperature of 50 °C in acetate buffer at pH 5.5 for 72 h. The structure and morphology of both parenchyma cellulose and its oxidized product were further characterized by means of Fourier transform infrared spectroscopy (FTIR), X-ray photoelectronic spectroscopy (XPS), X-ray diffraction (XRD), and scanning electron microscopy (SEM). These techniques confirmed that parenchyma cellulose from bagasse pith was successively modified by an effective TEMPO-derivative-catalyzed oxidation process. The finding of this study might provide guidance in maximizing the yield of SCA from parenchyma cells utilizing the 4-acetamide-TEMPO/NaClO/NaClO 2 system. Considering the simple preparation process and favorable SCA property, this BP parenchyma cellulose showed unique characteristics with a great promise for high-valued modification and application in the areas of advanced and functional materials.
研究领域:
生物质转化
·
高分子化学
·
材料科学
·
绿色化学
·
纤维素化学
·
功能材料
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
·
2014
·Vol. 15
·期 4
·6161-6168
·
IF 2.339
Runqiang Liu,Yijun Zhang,Lianyang Bai,Mingxian Huang,Jun Chen,Yuping Zhang
A chiral selector of cellulose-2,3-bis(3,5-dimethylphenylcarbamate) (CBDMPC) was synthesized by reacting 3,5-dimethylphenyl isocyanate with microcrystalline cellulose dissolved in an ionic liquid of 1-allyl-3-methyl-imidazolium chloride (AMIMCl). The obtained chiral selector was effectively characterized by infrared spectroscopy, elemental analysis and1H NMR. The selector was reacted with 3-aminopropylsilanized silica gel and the CBDMPC bonded chiral stationary phase (CSP) was obtained. Chromatographic evaluation of the prepared CSPs was conducted by high performance liquid chromatographic (HPLC) and baseline separation of three typical fungicides including hexaconazole, metalaxyl and myclobutanil was achieved using n-hexane/isopropanol as the mobile phase with a flow rate 1.0 mL/min. Experimental results also showed that AMIMCl could be recycled easily and reused in the preparation of CSPs as an effective reaction media.Keywords:1-allyl-3-methyl-imidazolium chloride;synthesis;Cellulose-2,3-bis(3,5-dimethylphenylcarbamate);high performance liquid chromatography;chiral stationary phase;enantioseparation
研究领域:
化学
·
分析化学
·
色谱学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Environmental Chemical Engineering
·
2023
·
IF 7.7
Danya Zhan,Qiongfen Yu,Ming Li,Zhenhua Gu,Shengnan Sun,Yinning Li,Aimin Li,Rong Zhu,Zhongfan Mo,Runfang Ma
Utilizing biological resources facilitates alleviating energy shortage and environmental pollution problems, but high-value utilization of these resources requires breaking the biomass structure. This study realized the clean and efficient separation of cellulose, hemicellulose, and lignin from tobacco stems using a sustainable H 2 O 2 -enhanced alkaline pretreatment combined with acid and ethanol precipitation. The purity and thermal stability of the separated cellulose increased from 32.49% to 92.41% and 261 °C to 369 °C, respectively. Changes in the cellulose crystal form and the solubilization mechanisms of hemicellulose and lignin were elucidated. In addition, a food-preservation film was prepared from the obtained biocellulose using the solution-casting method. After adding glycerol and sorbitol as plasticizers , the tensile strength and water-contact angle (a hydrophobicity indicator) of the biocellulose composite film increased from 125 MPa to 154 MPa and from 50.48° to 73.16°, respectively. This study provides a platform for lignocellulosic biomass separation, renewable utilization, and a practical route toward functional biomaterial production.
研究领域:
生物化学
·
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
POLYMERS FOR ADVANCED TECHNOLOGIES
·
2015
·Vol. 26
·期 11
·1306-1311
·
IF 1.757
Deming Zeng,Jian Lv,Huashan Liu,Rui Du,Hui Lv,Chun Wei
In this paper, the effects of preparation methods on mechanical and tribological properties of sisal fiber cellulose microcrystalline (SFCM)/unsaturated polyester (UP) composites were studied. Compared with the pure UP composites, the SFCM/UP composites prepared by in-situ polymerization had greatly improved the mechanical and tribological properties. The impact strength, flexural strength, and flexural modulus of SFCM/UP composites with 2 wt% SFCM were 6.8 KJ/M 2 , 105.53 MPa, and 14.29 GPa, increased by 74.81%, 33.38%, and 7.36% in comparison with pure UP composites, respectively. Meanwhile, the volume wear rate of SFCM/UP composites at 100, 150, and 200°C decreased 50.40%, 52.39%, and 50.06%, respectively. These results suggested that the properties of SFCM/UP composites prepared by in-situ polymerization were significantly improved, which may be attributed to the strong interface interactions between SFCM and UP matrix. Copyright © 2015 John Wiley & Sons, Ltd.
研究领域:
材料科学
·
复合材料工程
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）