Coatings
·
2023
·Vol. 13
·期 2
·317
·
IF 3.4
Yan Zhang,Tianyi Sun,Dashuai Zhang,Chen Li,Jinrui Liu,Bangsen Li,Zaifeng Shi
The fact that the use of a large number of plastic products has brought serious pollution to the environment has always been the focus of global attention. The development of photocatalytic degradable plastics is one of the effective ways to solve the problem of “white pollution”. In this work, La3+modified TiO2nanoparticles were prepared by ball milling and characterized. La3+/TiO2was mixed with Polyvinyl chloride (PVC) plastic to make a photodegradable composite film, and the photodegradation performance and mechanical properties of films were evaluated. The photodegradable films were characterized by infrared spectroscopy (FT-IR), X-ray diffractometry (XRD), and scanning electron microscopy (SEM). After 30 h UV irradiation, the weight loss rate of the PVC was only 2.12%, while that of the TiO2/PVC reached 8.94%. The accelerating of the degradation rate was due to the mixing of TiO2into PVC. As for the La3+/TiO2/PVC composite film, when the mass percentage of La3+/TiO2was 1.5%, the weight loss rate of La3+/TiO2/PVC sample reached a maximum of 17.78%, which was eight times the degradation rate of PVC and two times the degradation rate of TiO2/PVC. The La3+/TiO2/PVC film showed good photodegradability. La is a transition metal element with a special 4f electronic structure. The reaction mechanism of photodegradation of PVC by the interaction of La3+and TiO2were discussed.Keywords:La3+modified TiO2;La3+/TiO2/PVC composite film;ball milling method;photodegradation
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
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
JOURNAL OF APPLIED POLYMER SCIENCE
·
2014
·Vol. 132
·期 2
·
IF 1.64
Zhenjiang Yu,Xuyang Liu,Fangbo Zhao,Xiaoyang Liang,Yu Tian
A novel low-cost SiO 2 /Polyvinylchloride (PVC) membrane with different nano-SiO 2 particles loading (0–4 wt %) was prepared by the phase-inversion process. The optimum nano-SiO 2 dosage was determined as 1.5 wt % based on the casting solution compositions, the membranes' mechanical properties and hydrophilicities, the pure water fluxes, microstructures, and absorption of protein. Compared with the bare membrane, the membrane with 1.5 wt % nano-SiO 2 addition presented better capabilities against the protein absorption and bacterial attachment, better antifouling performance, and higher flux recovery ratio in filtration of the supernatant liquor which collected from a secondary sedimentation tank in a municipal wastewater plant. The SiO 2 /PVC membranes have applicable potential in the municipal wastewater treatment for their low price, good antifouling performance and high removal efficiencies of SS (over 97.2%), COD (up to 82.9%) and total bacteria (more than 93.6%). © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015 , 132 , 41267.
研究领域:
环境科学
·
材料科学
·
水处理工程
✓ 已验证
DOI
高影响因子
COLLOID AND POLYMER SCIENCE
·
2021
·Vol. 300
·期 1
·51-57
·
IF 1.931
Wang Bin,Jiang Fan,Ma Xiangmei,Dong Zhehao,Liu Yixing
Zinc oxide (ZnO) is often used as an ultraviolet (UV) light capture agent to improve the UV protective ability of polymers. However, its poor affinity and photocatalytic effect on the polymer properties. To overcome these, ZnO nanoparticles (NPs) with superior UV-shielding properties were made via the synergistic role of (3-aminopropyl) triethoxysilane (APTES) and resorcinol diglycidyl ether (RDGE) functionalization and then added to PVC solution, and composite films were prepared by a casting method. HRTEM, XRD, SEM, TGA, FTIR, and UV spectrophotometer were applied to study the structure, dispersion, and optical performance. The results showed that the functionalization ZnO NPs could be well dispersed in PVC. The composite films have excellent shielding ability to UV light and greatly decrease the photocatalysis efficiency. Therefore, this work provides a new strategy to make PVC nanocomposites with superior UV resistance, which may expand its application range in packaging and fiber/textile fields.
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
DESALINATION
·
2024
·
IF 8.3
Shibo Liang,Lutao Peng,Qin Yi,Zhi Huang,Yanbin Luo,Zixuan Yang,Jinpeng Zhu,Bart Van der Bruggen,Lelin Zeng
Conventional polymer inclusion membranes (PIMs) exhibit suboptimal mechanical properties. Consequently, new composite PIMs were prepared by a modified solvent evaporation method using a PTFE base membrane, a PVC polymer, and an organic phosphonate extractant. Their chemical compositions and microstructures were analyzed by ATR-FTIR and FESEM. The mechanical and mass transfer properties of the composite PIMs were systematically investigated. The composite PIMs exhibited significantly higher tensile strength (36.86 MPa to 52.77 MPa), reduced tensile strain (76.49 % to 118.49 %), and enhanced bursting strength exceeding 0.2 MPa, compared to conventional PIMs. The Zn 2+ /Cu 2+ were separated with a high separation coefficient of 2003.19 by a retardant-enhanced composite PIM system. A new mass transfer model was developed by analyzing the multilayered structure of composite PIMs in depth. The apparent diffusion coefficient of Zn 2+ within PTFE-PVC composite layer (7.76 × 10 −14 m 2 /s) was found to be lower than that within polymer inclusion layer (3.18 × 10 −13 m 2 /s). The optimal regions of polymer inclusion layer thickness, contact area, and time were selected by model calculation for a certain separation task (e.g., purity ≥ 0.97 and yield ≥0.80 for Zn 2+ or Cu 2+ ). Finally, the retardant-enhanced composite PIMs were successfully used for selective separation of several other transition metal ions.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
ChemistrySelect
·
2024
·Vol. 9
·期 39
·e202404063
·
IF 1.9
Xiangmei Ma,Shengmin Pan,Yiqing Wu,Bin Wang
Graphical A novel composite (BCE) by depositing ethyl 3,4-dihydroxybenzoate on the surface of Bi2S3-doped CeO2 was synthesized, and the prepared BCE/polyvinyl chloride (PVC) composite films displaied excellent UV-shielding property, butbarely catalytic thermal decomposition of the PVC matrix. In this study, bismuth sulfide (Bi 2 S 3 )-doped cerium oxide (CeO 2 ) was prepared via hydrothermal method, and by depositing ethyl 3,4-dihydroxybenzoate (EDHB) on the surface of Bi 2 S 3 /CeO 2 (Bi 2 S 3 /CeO 2 /EDHB and BCE). The samples were characterized by FTIR, XRD, TEM, and UV–vis absorption spectrum means. According to the characterizations, Bi 2 S 3 was successfully incorporated into the CeO 2 structure (Bi 2 S 3 /CeO 2 ), and the prepared BCE/PVC composite films display excellent UV-shielding property. Moreover, the result of thermogravimetric analysis (TGA) tests indicated that BCE also was barely catalytic thermal decomposition of PVC matrix. This work not only paves an attractive way for the design of the CeO 2 -based UV-shielding agent, but also provides valuable insights into the inspiration to construct high-performance UV-shielding composites.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
Materials Research Express
·
2020
·Vol. 8
·期 1
·015303
·
IF 1.929
Dashuai Zhang,Xiaoxue Lin,Yan Zhang,Xiaopeng Zhang,Chen Li,Yang Lin,Tianyi Sun,Linhua Zhu,Qiang Lin,Zaifeng Shi
The PVDF/PVC superhydrophobic composite membrane was prepared by non-solvent induced phase separation method. When the concentration of PVDF/PVC(= 85/15) is 4%, DMF can be used as a solvent to prepare PVDF/PVC superhydrophobic composite membrane by using the simple and applicable NIPS method. Through static contact angle and rolling angle, it was found that the maximum contact angle of PVDF/PVC composite membrane with low concentration can reach 152°, rolling angle is 3 degrees, and the surface potential energy is also relatively low about 8°. It was found by DSC that the crystallinity of PVDF/PVC composite membrane with low concentration was higher, SEM shows that the surface of 4% PVDF/PVC composite membrane has nano scale protrusion, and AMF finds that the surface of 4% PVDF/PVC composite membrane was high Surface roughness. When the surface roughness was high, the surface hydrophobicity is improved, the wetting problem was alleviated, the self-cleaning ability of the membrane is improved, and the membrane pollution is reduced. It was found that the 4% PVDF/PVC composite membrane prepared by low concentration method has a long-lasting self-cleaning performance and can be used as an organic coating in the field of self-cleaning.
研究领域:
材料科学
·
膜技术
·
表面工程
✓ 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）