Polymers
·
2019
·Vol. 11
·期 12
·2096
·
IF 3.164
Wenjie Chen,Jiao Ding,Xuming Yan,Wei Yan,Ming He,Guoqiang Yin
The use of waste plant protein obtained from underutilized and non-food-producing plants may be a promising strategy in the development of bioactive packaging. A series of blend films were prepared by casting from cottonseed protein (CP) and poly(vinyl alcohol) (PVA) and modified with different plasticizers. The morphology, structure, and crystallinity of each of the blend films were characterized by scanning electron microscopy, Fourier transform infrared spectroscopy, and X-ray diffraction. CP and PVA were found to be compatible in the appropriate ratios, and the CP/PVA blend films were partially crystalline. We compared the effects that four plasticizers, i.e., glycerol, triethanolamine (TEA), ethylene glycol, and polyethylene glycol, had on the performance of the CP/PVA blend films. Plasticizers altered the degree of interaction between CP and PVA, which changed the secondary structure of the CP but had little effect on the crystallinity of CP/PVA blend films. Among the different plasticizers tested, TEA was the most efficient at improving the elongation at the break, tensile strength, and oxygen barrier properties of the CP/PVA blend films. Such CP/PVA blend films plasticized using TEA can, therefore, be considered emerging and promising plastics for potential applications in food packaging and flower planting applications.Keywords:cottonseed protein;poly (vinyl alcohol);plasticizer;blend films;triethanolamine
研究领域:
材料科学
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生物技术
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包装工程
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产品关联
DOI
PubMed
高影响因子
POLYMER ENGINEERING AND SCIENCE
·
2018
·
IF 1.551
Tengyang Zhu,Xing Yang,Yayun Zheng,Xiaoqi He,Feifei Chen,Jujie Luo
A series of poly(amide- co -poly(propylene glycol)) (PA-PPG) random copolymers with different content of PPG were designed by polycondensation reaction. These random copolymers were blended up to 60% with commercially available Pebax 2533. The blend membranes were characterized by Fourier-transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD), scanning electron microscope (SEM). Gas permeation properties of these blend membranes were investigated using five single-gases (CO 2 , H 2 , O 2 , CH 4 , and N 2 ) at different temperature of 25–55°C and 1.0 atm. The impacts of content of PA-PPG with different PPG content and operating temperature on CO 2 separation properties of Pebax/PA-PPG blend membranes were studied. The results showed that CO 2 permeability gradually increased with the increasing operating temperature, whereas CO 2 permeability gradually decreased with the increase in content of PA-PPG. CO 2 /N 2 selectivity gradually increased with the increase in content of PA-PPG. In particular, Pebax/PA-PPG (50)–60% displayed excellent CO 2 and O 2 separation properties ( P CO2 = 79.7 Barrer and P O2 = 13.6 Barrer, CO 2 /N 2 = 34.7 and O 2 /N 2 = 5.9) at 25°C and 1.0 atm. POLYM. ENG. SCI., 59:E14–E23, 2019. © 2018 Society of Plastics Engineers
研究领域:
材料科学
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环境工程
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DOI
高影响因子
FIBERS AND POLYMERS
·
2018
·Vol. 19
·期 6
·1150-1156
·
IF 1.353
Fu Rao,Dong Congcong,Sun Changmei,Qu Rongjun,Ji Chunnuan,Zhang Ying
Enzyme degradation method was adopted to prepare porous m -aramid/cellulose blend membranes with high air permeability, water absorbency and moisture permeability. This facile preparation process started by casting a blend membrane from a DMAc/LiCl solution containing m -aramid and cellulose. An enzyme was then used to degrade the cellulose in the blend membrane, resulting in porous structures. Five enzymes including cellulase, chitosanase, papain, lipase, and glucose oxidase, were evaluated and cellulase was found to be optimal. Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM) were used to characterize the miscibility and the morphology of the m -aramid/cellulose blend membranes before and after degradation, respectively. The thermal stability of the blend membranes were characterized by thermogravimetric analysis (TGA). The properties including air permeability, water absorbency and moisture permeability of the m -aramid/cellulose blend membranes greatly improved after degradation as compared to those of the pure m-aramid. This paper provided a new approach to preparing novel textile materials with high comfortability.
研究领域:
材料科学
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生物技术
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产品关联
DOI
高影响因子
Polymers
·
2022
·Vol. 14
·期 24
·5550
·
IF 4.967
Xinqing Wang,Zhenhua Huang,Zhaoyang Niu,Fangping Chen,Changsheng Liu
In recent years, with the development of green environmental protection, starch film has become of interest due to the wide availability of sources, low price, and biodegradability. Amylose/polyvinyl alcohol (PVA) blend films crosslinked with different amounts of glutaraldehyde (GLU) were prepared by a solution casting method. The cross-linking degree, water sorption, tensile property, crystallization and section morphology of the films were examined. With the increase in glutaraldehyde concentration, the cross-linking degree of the blend film was improved. The wide-angle X-ray scattering (WAXS) result indicated that cross-linking hindered the crystallization of film. The section morphology of films was examined by scanning electron microscope (SEM). The results showed that the cross-linking degree of amylose film improved while the crystallinity decreased with the increase in glutaraldehyde content. Cross-linking had no obvious effect on the water sorption property of the blend films. The cross-linking modification significantly enhanced the tensile strength and Young’s modulus, while it reduced the elongation at break of the blend films. It was found that the film with 0.5 wt % glutaraldehyde possessed the best performance: the tensile strength increased by 115%, while the elongation at break decreased by 18% even at high relative humidity (RH) of 90% compared to non-crosslinked films. The developed amylose/PVA blend films have promising application prospects as agricultural mulch films and packaging materials.Keywords:high content of amylose;amylose/PVA blend film;crosslinking;mechanical property;starch
研究领域:
材料科学
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生物材料
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产品关联
DOI
PubMed
高影响因子
POLYMER
·
2024
·
IF 4.1
Qingchen Lu,Xiaoming Zhang,Yexiong Qi,Haibo Yuan,Guoli Li
Polyvinyl alcohol (PVA) has excellent physical and chemical properties; however, its rigidity easily leads to brittleness and breakage during use. Additionally, due to intramolecular hydrogen bonding, the dense structure of the film limits its application. This research used a self-toughening approach by homogeneously blending PVA 0588 and PVA 0499 with different molecular weights to enhance the toughness of PVA and create a porous structure for broader application in membrane separation. Porous PVA membranes were then produced through mechanical stretching. Rheological testing, differential scanning calorimetry, and dynamic thermomechanical analysis confirmed that the blend system is partially compatible. Mechanical characterization revealed that adding PVA 0499 decreased the tensile modulus, strength, and bending modulus of the blended film but increased the elongation at break, reaching a maximum of 179 %. This result indicates that homogeneous blending effectively achieved PVA self-toughening. After this, the PVA blended membrane underwent mechanical stretching. Results showed that the stretched membrane developed a porous structure with a PVA 0588 content of 60 wt%, yielding a pure water flux of 70.3 L m −2 h −1 MPa −1 and a glucan rejection rate of 91.07 %. The molecular weight cut-off test demonstrated that the resulting porous membrane was suitable for water treatment, effectively filtering substances with a molecular weight of ≥70 kDa. The membrane also exhibited notable antifouling properties. The hydrophilicity and high roughness of the porous membrane facilitated the formation of additional hydrogen bonds between the membrane surface and water molecules, thereby reducing direct contact between pollutants and the membrane surface. This study provides preliminary theoretical and experimental insights into enhancing PVA toughness and expanding its applications in membrane separation. Furthermore, homogeneous blending opens new avenues for improving the mechanical performance of polymers.
研究领域:
材料科学
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化学工程
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环境工程
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高分子科学
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DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2019
·Vol. 137
·期 15
·48569
·
IF 2.188
Wenying Shi,Xianhua Zeng,Hongbin Li,Haixia Zhang,Xiaohong Qin,Rong Zhou
In order to obtain the compatible poly( p -phenylene terephthalamide) (PPTA)/polyvinylidene fluoride (PVDF) blend membranes, the casting solution was synthesized via the in situ polycondensation process and flat sheet blend membranes were successfully prepared through the immersion precipitation phase inversion method in our previous study. In this study, the polycondensation solution was directly used as the spinning dope to fabricate PPTA/PVDF hollow fiber in-situ blend membrane by the dry-wet spinning technique. Hollow fiber membranes were employed to remove the dyes including Congo red (CR) and methylene blue (MB) from the dyeing liquor. Effects of operation conditions on dye rejection and membrane water flux were investigated. With the increase of operation pressure, feed concentration and feed temperature, dye rejection rates gradually decreased, but the rejection value of CR and MB still remained above 99.5%. On the contrary, the permeation water flux basically increased. During the continuous dye filtration of 300 min, hollow fiber membrane can maintain high dye rejection rates and stable water flux. The combination method of physical backwashing and chemical cleaning can effectively alleviate membrane fouling and recover membrane water flux. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2020 , 137 , 48569.
研究领域:
材料科学
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环境工程
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产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2024
·Vol. 59
·期 10
·4354-4365
·
IF 3.5
Liu Chang,Li Ning,Niu Li,Li Xu,Feng Jacko,Liu Zhiming
The crosslinked of hydroxypropyl methylcellulose (HPMC) and sodium alginate (SA) with a range of weight ratios formed blend films. Antibacterial packaging films (HPMC/ZA blend film) were prepared by simple ion exchange method with HPMC/SA blend film. The mixture of Zn 2+ gave a plenty effect of the prepared films. The microstructure, physical properties, structure, and antibacterial properties of crosslinked films were investigated in detail. It was found that the infrared shifted peaks of O–H stretching and O–H bending in crosslinked HPMC/ZA film, which was caused by the formation of hydrogen bond between HPMC and ZA. SEM images of HPMC 5 /ZA 5 blend film exhibited rougher structure. In addition, the light transmission, thermal properties, water vapor permeability, and antibacterial activity of HPMC 5 /ZA 5 blend film are obviously enhanced, compared with HPMC/SA blend film. Furthermore, HPMC 5 /ZA 5 blend film exhibited better antibacterial activity against S. aureus and E. coli , revealing the possible application on food packaging.
研究领域:
材料科学
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高分子科学
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食品包装
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抗菌技术
✓ 已验证
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2025
·Vol. 14
·期 1
·120850
·
IF 7.2
Xiaohua Tong,Enyang Zhang,Guangran Shao,Ming Yuan,Boyi Song,Wangqing Zhang
Polymer blending is a simple and cost-effective method to improve the gas separation performance of polyimide membranes, thereby potentially overcoming the inherent permeability/selectivity trade-off effect. However, its application still faces challenges, since only a few polymers are miscible with polyimides, and the mechanical property of the membranes usually reduces significantly after polymer blending. Herein, we prepare membranes by blending polyimide containing bulky isopropyl substituents with a small amount of polar polymers such as polyacrylonitrile (PAN). The resultant blend membranes using PAN as additive not only possess excellent gas separation performance but also maintain good mechanical property. For example, when 0.8 wt% PAN is added, the corresponding blend membrane displays a high CO 2 permeability of 632.2 Barrer and a high CO 2 /CH 4 selectivity of 23.4 under humidified condition, close to the 2008 Robeson upper bound, which is attributed to the formation of micro-phase separation structure within the blend membranes. Moreover, the tensile strength of the blend membranes using 0.8 wt% PAN as additive is only 12 % lower than that of the pure polyimide membrane. In addition, the blend membranes using PAN as additive show remarkable stability against physical aging and outstanding long-term operation stability, suggesting their great prospect for natural gas purification and biogas upgrading.
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DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2022
·
IF 10.53
Jian Ren,Xin Yang,Weixing Yan,Xia Feng,Yiping Zhao,Li Chen
The efficiency of the hemodialysis membrane has been widely improved by blending small molecular additives and modifying the membrane surface for patients with chronic or acute kidney disease. However, a qualified sieving property, flux, and hemocompatibility are intractable to give consideration simultaneously, while the elution of small-molecular additives and modifiers easily cause coagulation, complement activation, etc. Fortunately, the BCP methoxy polyethylene glycol-polyethersulfone-block-methoxy polyethylene glycol (mPEG -b- PES -b- mPEG) based membranes exhibiting great potential for sieving in middle molecular toxin and compatibility between mPEG -b- PES -b- mPEG and PES, is nearly unfeasible elution during hemodialysis, by reason of including bounded hydrophilic segments by chemical bonds. Here, the mPEG -b- PES -b- mPEG is synthesized to fabricate the membranes, including blend membranes and BCP membrane. As a result, the blend membranes have shown an increasing flux, hemocompatibility, and sieving of lysozyme with the increasing cooperation of mPEG-b-PES-b-mPEG, the block copolymer (BCP) mPEG -b- PES -b- mPEG membrane has shown better balance than the blend membranes in flux, sieving, and hemocompatibility. Besides, for exploring further possibilities, the typical blend membrane M4 (mPEG- b -PES- b -mPEG: 20%, PES: 5%) and BCP membrane M5 (mPEG- b -PES- b -mPEG: 25%) are post tailored by ethanol at 50 °C for 2 h. This process leading the typical membranes to an efficient flux (M5-P: 442.22 L m −2 h −1 ) and sieving performances (M5-P: the urea and lysozyme sieving of 96.43% and 74.97%) due to the effect of ethanol at the micro-molecular chain movements and microspheres transfer. Our work presents BCP mPEG -b- PES -b- mPEG a promising future in hemodialysis membranes according to the superior performances of flux and sieving.
研究领域:
材料科学
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生物医学工程
·
纳米技术
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DOI
高影响因子
JOURNAL OF FOOD SCIENCE AND TECHNOLOGY-MYSORE
·
2014
·Vol. 52
·期 5
·3072-3078
·
IF 2.024
Song Lianjun,Zhi Junli,Zhang Pingan,Zhao Qiuyan,Li Ning,Qiao Mingwu,Liu Jie
In this study, a new method was developed to produce biodegradable material using soy protein isolate (SPI) as matrix. The blend films were successfully prepared by casting the aqueous dispersions of SPI and polyamic acid salt (PAS) solution. The effects of blending and PAS content on the structure of the resultant films were investigated by Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), differential scanning calorimetry (DSC) analyses, scanning electron microscopy (SEM). Furthermore, film thickness, water vapor permeability (WVP), water barrier and mechanical properties were measured. The result showed that there exists strong intermolecular interactions between SPI and PAS, which played an important role in forming a homogeneous structure of the blend films. Moreover, the incorporation of PAS enhanced the water barrier and mechanical properties of the films. This is a simple way to prepare biodegradable films compared with other methods and the blend films have the potentiality to be used as food packaging and biomedical materials instead of synthetic polymer.
研究领域:
生物材料学
·
高分子科学
·
食品科学
·
包装工程
·
生物医学工程
✓ 已验证
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2017
·Vol. 135
·期 6
·45832
·
IF 1.86
Li-Feng Fang,Hideto Matsuyama,Bao-Ku Zhu,Shuaifei Zhao
In this study, antifouling poly(vinyl chloride) (PVC) blend membranes were prepared by blending the PVC based amphiphilic copolymer PVC -g- poly(hydroxyethyl methacrylate) (PVC- g -PHEMA), synthesized by atom transfer radical polymerization (ATRP), into the hydrophobic PVC matrix via the nonsolvent-induced phase separation method. The in situ ATRP reaction solutions were also used as the blend additives to improve membrane performance. Attenuated total reflectance–Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy indicated that the blend membranes based on the two blend routes exhibited similar surface chemical compositions. The membrane morphology and surface wettability were determined by scanning electronic microscopy and water contact angle measurement, respectively. The blend membranes showed improved water permeability, comparable rejections and enhanced antifouling properties compared with the pure PVC membrane. The PVC blend membranes also had excellent long-term stability in terms of chemical compositions and fouling resistance. The results demonstrated that ATRP was a promising technique to synthesize amphiphilic copolymer and prepare stable blend antifouling membranes. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018 , 135 , 45832.
研究领域:
材料科学
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聚合物化学
·
膜技术
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产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2016
·
IF 5.557
Li-Feng Fang,Bao-Ku Zhu,Li-Ping Zhu,Hideto Matsuyama,Shuaifei Zhao
Two new amphiphilic copolymers poly(methyl methacrylate- graft -poly(ethylene glycol) methacrylate) (PMMA -g- PEG) are synthesized and blended into polyvinyl chloride (PVC) to prepare membranes in different coagulation media (water and ethanol) via the non-solvent induced phase separation method. The prepared membranes are characterized by X-ray photoelectron spectroscopy, proton nuclear magnetic resonance , scanning electron microscopy, atomic force microscopy and water contact angle measurement. Their separation performance and fouling resistance (by protein adsorption and foulant filtration) are also compared. It is found that the membrane hydrophilicity is significantly increased by blending amphiphilic copolymer due to the introduction of hydrophilic poly(ethylene glycol) (PEG) segments of the copolymer. The membranes formed in water have more desirable structures (i.e., smoother surfaces and higher porosity) and better performance (i.e., higher permeability and rejection to bovine serum albumin) compared with those formed in ethanol. The amphiphilic copolymer blended membranes formed in the water coagulation bath exhibit excellent antifouling properties, in particular, showing ~100% fouling reversibility. Therefore, blending amphiphilic copolymers and selecting water as the coagulation media can be effective strategies to develop high performance antifouling membranes.
研究领域:
材料科学
·
化学工程
·
膜技术
✓ 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）