POLYMER DEGRADATION AND STABILITY
·
2020
·
IF 4.032
Yan Zhang,Tianyi Sun,Dashuai Zhang,Zaifeng Shi,Xiaopeng Zhang,Chen Li,Lili Wang,Junjun Song,Qiang Lin
A novel photodegradable Nano-G/TiO 2 /PVC composite film was prepared by codoping nano-graphite (Nano-G) and TiO 2 photocatalyst in Polyvinyl chloride (PVC) plastic. The Characterization tests were performed by using ultraviolet-visible spectroscopy (UV-vis), infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), gel permeation chromatography (GPC) and physical and mechanical properties. Compared with TiO 2 /PVC, Nano-G/PVC and PVC film, the Nano-G/TiO 2 /PVC composite film showed higher photodegradability. The weight loss rates of Nano-G/PVC (Nano-G 1 wt%), TiO 2 /PVC (TiO 2 1 wt%) and Nano-G/TiO 2 /PVC (Nano-G 1 wt%, TiO 2 1 wt%) films after the UV irradiation for 30 h were 7.68%, 8.94% and 17.24%, respectively, while that of PVC was only 2.12%. For the Nano-G/TiO 2 /PVC composite film, the optimal doping amount of nano-graphite is 1 wt%. The decline rates of Mw and Mn of Nano-G/TiO 2 /PVC (Nano-G 1 wt%, TiO 2 1 wt%) composite film were 12.93% and 61.97%, respectively, which were much higher than that of PVC. Nano-graphite can effectively improve the migration and separation of TiO 2 photogenerated electrons, improving the photodegradation rate of PVC. The mechanism of the Nano-G/TiO 2 /PVC composite film photocatalytic degradation was proposed. The photocatalytic technology is a feasible and effective way to solve "white pollution".
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
Polymer-Plastics Technology and Materials
·
2021
·
IF 2.371
Yan Zhang,Zaifeng Shi,Tianyi Sun,Dashuai Zhang,Xiaopeng Zhang,Xiaoxue Lin,Chen Li,Lili Wang,Junjun Song,Qiang Lin
A novel photodegradable Methylene Blue (MB)/TiO2/PVC film was prepared. The physical and mechanical properties, hydrophilicity, and the thermal stability of the film before irradiation were characterized. The photodegradability test was performed by using gel permeation chromatography (GPC), infrared spectroscopy (FT-IR), ultraviolet-visible spectroscopy (UV-vis), and scanning electron microscopy (SEM). Compared with TiO2/PVC, MB/PVC, and PVC, the MB/TiO2/PVC film showed the higher photodegradability. The weight loss rates of TiO2/PVC, MB/PVC, and MB/TiO2/PVC films after irradiation for 30 h were 8.94%, 15.84%, and 27.55%, respectively, while that of PVC was only 2.12%. The decline rates of Mw and Mn of MB/TiO2/PVC (MB 2 wt%, TiO2 1 wt%) were 35.68% and 65.38%, respectively. Due to the excellent degradability and usability of the MB/TiO2/PVC film, the photocatalytic technology is a feasible and effective way to solve “white pollution”.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
Advanced Sustainable Systems
·
2024
·
IF 6.5
Yan Gao,Yanan Wang,Yujie Cao,Yajie Hu,Guantao Wang,Mingguang Han,Sida Luo
Macroscopic 3D-controllable graphene (3D-CG) architectures not only retain the intrinsic properties of graphene sheets but also exhibit structural advantages for pollutant adsorption and energy storage. This paper proposes a novel hybrid powder-based additive manufacturing method to fabricate 3D biomass-derived laser-induced graphene (3D B-LIG) structures with customizable geometries and microporous features. This method utilizes two waste sources as feedstock precursors for sustainable graphene production: “black liquor” (sodium lignosulfonate, NaLS) and “white pollution” (polypropylene, PP). Employing a computer-aided design process, this method allows for the synchronous creation of various freeform macrostructures, with either identical or variable sections. To optimize the formability and processing efficiency of 3D B-LIG, systematic studies have been conducted. These studies establish the relationship between processing parameters and the resulting structures by controlling the laser parameters and the mixing ratio of NaLS and PP. By leveraging tunable microporous structures with a maximized specific surface area of 485.3 m 2 g −1 , 3D B-LIG demonstrates exceptional performance in pollutant adsorption (with a maximum adsorption capacity of 283.3 mg g −1 for methylene blue) and energy storage (with a gravimetric specific capacitance value of 194.9 F g −1 ).
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
ACS Nano
·
2022
·
IF 18.027
Lu Chen,Siheng Wang,Shanshan Wang,Chang Chen,Luhe Qi,Le Yu,Ziyang Lu,Jing Huang,Junqing Chen,Zhen Wang,Xiao-Wen Shi,Zhanqian Song,He Liu,Chaoji Chen
Heavy reliance on petrochemical-based plastic foams in both industry and society has led to severe plastic pollution (the so-called “white pollution”). In this work, we develop a biodegradable, recyclable, and sustainable cellulose/bentonite (Cel/BT) foam material directly from resource-abundant natural materials (i.e., lignocellulosic biomass and minerals) via ambient drying. The strong resistance to the capillary force-driven structural collapse of the preformed three-dimensional (3D) network during the ambient drying process can be ascribed to the purpose-designed cellulose–bentonite coordination interaction, which provides a practical way for the locally scalable production of foam materials with designed shapes without complex processing and intensive energy consumption. Benefiting from the strong cellulose–bentonite coordination interaction, the Cel/BT foam material demonstrates high mechanical strength and outstanding thermal stability, outperforming commercial plastic polystyrene foam. Furthermore, the Cel/BT foam presents environmental impacts much lower than those of petrochemical-based plastic foams as it can be 100% recycled in a closed-loop recycling process and easily biodegraded in the environment (natural cellulose goes back to the carbon cycle, and bentonite minerals return to the geological cycle). This study demonstrates an energy-efficient ambient drying approach for the local and scalable production of an all-natural cellulose/bentonite foam for sustainable packaging, buildings, and beyond, presenting great potential in response to “white pollution” and resource shortage.
研究领域:
材料科学
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环境科学
·
生物工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Yuxin Qi,Ying Bi,Chao Kong,Changyin Zhu,Hu Cheng,Yinlong Zhang,Jiangang Han,Jianming Xue,Ziyan Li,Yang Song,Dongmei Zhou
Recycling difficult-to-degrade plastics, also known as “white pollution”, is currently being researched in the fields of materials and the environment, which is an extremely challenging topic. In this study, a pyrolysis-activation method combined with multiple activators was developed to prepare stable porous plastic chars (PPCs) from discarded plastic bottles for removing the typical antibiotic sulfamethoxazole (SMX). Micro/mesopores were formed in the PPCs, with the specific surface area reaching 961.20 m 2 /g. C, O, and N were the main elements in the PPCs, and their atomic ratios showed the hydrophobicity and aromaticity. Graphite-like structures and abundant surface functional groups were generated in the PPCs. Unlike conventional char materials, impurities, such as aluminum oxide, have high reflectivity, resulting in the appearance of many shining spots. PPCs display a high sorption capability for SMX, with the maximum sorption quantity determined reaching 487.52 mg/g. Multilayer sorption is dominated by physical processes, and pore filling, partitioning, hydrogen bonding, π-π stacking, and electrostatic interactions are the main sorption processes. Chemical-like sorption and mass transfer control the sorption rate. Furthermore, PPCs have stable performance and good recyclability and could be used for practical applications. This study provides a novel strategy and an example of the upcycling of discarded plastic as an excellent char material for environmental remediation.
研究领域:
材料科学
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环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·Vol. 141
·期 29
·e55674
·
IF 2.7
Zhepeng Di,Shuangqiao Yang,Shibing Bai
The problem of white pollution caused by waste agricultural mulch film (WAMF) has a long history and has brought great damage to the soil and ecological environment. The recycled WAMF has no processing performance because it is doped with a large amount of cotton straw and soil inorganic particles. In this study, it was reported for the first time that high-quality and efficient recovery of WAMF was carried out by means of solid-state shear milling (S 3 M) technology. After the pretreatment of S 3 M, the recycled WAMF is transformed into an active composite powder with a particle size of microns, which regains certain processing performance. Then we prepared a composite material similar to WPC (wood-plastic composite) by using the composite powder. It was found that under the action of strong three-dimensional shear force, the phase domain size of the composite decreased significantly, and the compatibility of each component improved. The macroscopic performance was that the tensile strength was increased by 65% and the bending strength was increased by 74%, reaching 8.30 and 17 MPa, respectively. The 24-h water absorption of this composite decreased by 13%. More importantly, the thermal stability was not significantly reduced during the milling process. This process does not require sorting, cleaning, or other operations, which can greatly simplify the process flow and improve recovery efficiency. It provides an effective solution to the problem of white pollution caused by WAMF.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
COMPOSITES SCIENCE AND TECHNOLOGY
·
2022
·
IF 9.879
Ming Yan,Hailong Lu,Ting Wu,Lili Zhang,Jinxia Ma,Xiaofan Zhou
The huge accumulation of plastic wastes is emerging as a serious threat to the ecological environment and human health. Herein, inspired by the reinforcement principle of lignin-carbohydrate complexes (LCC) in the natural trees, we design a green, highly efficient, and eco-friendly method to prepare cellulose composites with excellent performances. Cationic Guar Gum (CGG) and Lignosulfonate (LS), which are derived from biomass, are employed as raw materials to form LS-CGG complexes (LGC) acted as LCC analogs to improve the performance of the cellulose framework. Based on the principle of electrostatic interactions , a self-assembled and facile infiltrated strategy has been applied in the preparation of the LGC-filter paper complex (LGC-FP), which can be industrial-scale manufactured employing established and mature processes from pulping and papermaking industry. This work provides an eco-friendly, low-cost, and scalable route to prepare bioplastics, which is a promising alternative to address the “white pollution” and reach the carbon neutrality goal to a certain extent.
研究领域:
材料科学
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环境科学
·
生物工程
✓ 已验证
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2023
·Vol. 47
·期 42
·19494-19503
·
IF 3.3
Mengfei Zhang,Yang Wang,Jing Huang,Dong Wang,Ting Li,Shibo Wang,Weifu Dong
White pollution substantially impairs people's quality of life nowadays. Bio-based polymers that are environmentally friendly and biodegradable have garnered interest. Among them, polylactic acid (PLA) has attracted wide attention due to its excellent biodegradability, high transparency, and easy processing. However, its inherent flammability, low toughness, and poor compatibility with flame retardants severely limit its application scope. In this paper, a phytic acid-based flame retardant glycidyl methacrylate phytate (GPA) was prepared by epoxy ring-opening and phosphate transesterification. GPA was grafted onto PLA through free radical polymerization, and the introduction of GPA improved both the mechanical properties and flame retardancy of PLA. The LOI of PLA composite rose to 28% after adding a 6 wt% GPA. A reduction of 11.7% in the total heat release of the PLA-GPAX was observed in comparison to neat PLA, demonstrating that the prepared PLA composite exhibits high flame retardancy. Due to the improved dispersion and compatibility of GPA in the matrix after grafting onto PLA, the mechanical strength of PLA increased by 19.9%. This study provides a feasible method for improving the compatibility between flame retardants and bio-based polymers, achieving a mutually beneficial situation in flame retardancy and mechanical strength, and further expanding the application range of bio-based materials.
研究领域:
材料科学
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环境科学
·
高分子化学
✓ 已验证
DOI
高影响因子
Journal of Cleaner Production
·
2023
·
IF 11.1
Chun Wang,Qianqian Wang,Jintao Yu,Xinmeng Wang,Lijuan Wang,Bin Zhao,Lin Hao,Weihua Liu,Zhi Wang,Hao Chen,Qiuhua Wu
White pollution caused by the massive discharges of waste expanded polystyrene (WEPS) has become a critical global issue, so the effective conversion of WEPS is of great significance to reduce white pollution. Herein, adopting WEPS as raw material, three high-value-added hyper-crosslinked polymers (WEPS-HCPs) with high surface areas and abundant micro/mesoporous structures were synthesized via Friedel-Crafts alkylation reaction using dimethoxymethane, dichloroxylene and 4,4′-bis(chloromethyl)-1,1′-biphenyl (BCB) as cross-linker, respectively. The WEPS-HCPs were used as sorbent to extract aflatoxins (AFs) and all the HCPs exhibited high adsorption capacity . For the fast separation and recovery of the sorbent, WEPS-BCB was chosen as a model HCP to be magnetically functionalized to obtain a magnetic HCP (mWEPS-BCB) for the first time. Based on magnetic solid phase extraction with the mWEPS-BCB as sorbent, a fast and sensitive method was developed to determine trace level of AFs in grain food . Under the optimal conditions, the proposed method presented wide linear range (0.008–10.0 ng g −1 ), low detection limit (0.002–0.015 ng g −1 ) and satisfactory precision (relative standard deviation < 7%). Converting WEPS into a high-value-added sorbent not only provided a facile strategy for effective recycling of WEPS, but also developed a sensitive method for accurate determination of AFs in grain food, achieving significant economic and environmental benefits.
研究领域:
环境科学
·
材料科学
·
食品安全
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2025
·
IF 5.6
Min Hu,Jing Cao,Siyue Xiang,Ziye Xiang,Lurong Liu,Junfeng Zhang
This study innovatively employs a two-step process of ball-milling degradation and carbonization to convert waste PET plastics into porous carbon material (PET-C) rich in oxygen-containing functional groups, which functions as a high-performance additive for lead-acid battery anodes while achieving the high-value utilization of waste plastics. Leveraging a unique process design, the prepared PET-C combines a hierarchical pore structure with abundant surface carbonyl/carboxyl functional groups. This synergistic "pore-functional group" effect dramatically improves charge transfer efficiency and effectively inhibits irreversible PbSO 4 deposition. Remarkably, even trace amounts of PET-C substantially improve battery performance—the cycle life of a battery with 1 % PET-C reaches an impressive 21,062 cycles, representing an 11.35-fold increase compared to the control battery (1855 cycles), while a low carbon concentration of 0.3 % PET-C still maintains 7357 cycles. This study pioneers the integration of ball-milling plastic degradation with energy material preparation, thereby presenting a dual-pronged solution to "white pollution" management and lead-carbon battery (LCB) performance enhancement. The research not only elucidates the critical impact of carbon material surface chemistry on battery performance but also demonstrates the successful application of circular economy principles in the field of energy materials.
研究领域:
材料科学
·
储能
·
环境科学
·
化学工程
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
FIBERS AND POLYMERS
·
2024
·Vol. 25
·期 11
·4149-4160
·
IF 2.2
Hu Ke,Chen Hongxuan,Lin Yihui,Han Shitong,Wang Qi,Peng Houqian,Wang Ying,Zhao Jiwu,Xi Hailing,Wen Na,Long Jinlin
Abstract Polypropylene (PP) nonwovens have been widely used in disposable protective masks and protective clothing, which are essential to protect healthcare workers from highly infectious diseases such as COVID-19. However, realizing the disinfection reusable function of PP nonwovens to reduce carbon emission or white waste pollution after extensive use has been still a great challenge. Herein, Durable Antimicrobial and Anti-fungal Post-disinfection polypropylene nonwovens were developed by co-grafting of Triclosan and Chitosan. The antibacterial performance test results showed that the as-prepared co-grafted polypropylene nonwoven has a > 99.9% of antimicrobial efficiency against E. coli , S. aureus as well as multi-drug-resistant P. aeruginosa , and the excellent anti-fungal performance against fungus ( C. albicans ) and mold ( A. niger ). Moreover, it retained excellent Antimicrobial and Anti-fungal Properties after disinfection 3 times with boiling water, 40 × diluted 84 disinfectant and 75% alcohol for 5 min. This work provided ideas for developing more effective pathogen protection and longer-lasting personal protective equipment to reduce the environmental impact of medical masks and personal protective equipment in terms of energy consumption, carbon emissions and waste generation. Graphical Abstract Polypropylene (PP) nonwovens have been widely used in disposable protective masks and protective clothing, which are essential to protect healthcare workers from highly infectious diseases such as COVID-19. The as-prepared PP-AA-CS-TCL nonwovens exhibited an antibacterial efficiency of > 99.9% against E. coli , S. aureus , and P. aeruginosa as well as the excellent anti-fungal properties against C. albicans and A. niger. And the antimicrobial and anti-fungal activities were maintained even after disinfection 3 times with boiling water, 40x diluted 84 disinfectant and 75% alcohol for 5 minutes each. This provides a new way of thinking about reusing disposable surgical products with polypropylene nonwoven and reducing environmental pollution.
研究领域:
材料科学
·
生物医学工程
·
环境科学
·
纺织工程
✓ 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）