环境诱导表面重构调控PVC和PET塑料的可浮性

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Abstract The hydrophobic conversion of hydrophilic polyethylene terephthalate (PET) and polyvinyl chloride (PVC) plastics in different environments was researched on the basis of surface reconstruction and thermodynamics, aiming at the floatability fluctuation of waste plastics. It was revealed that 82%, 47% and 0.2% of PET hydrophobicity was recovered in air, ethanol, and water at temperature 70℃, and 100%, 37%, and 2% of PVC hydrophobicity was recovered. A non-polar air environment with high temperature favoured surface reconstruction and hydrophobicity restoration, while a polar water environment with low temperature induced hydrophilic plastic surfaces. Compared with the surface coating, the surface alcoholysis was more conducive to maintaining the hydrophilicity of the plastic. This study proposed that changing the molecules structure of plastic surface was beneficial to maintaining their hydrophilicity, and a low-temperature-entire-immersion process assisted plastic flotation in stability.

Key words： waste management plastic recycling plastic flotation surface reconstruction environmental response

Received: 21 May 2021

PACS:

X783.2

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	ZHANG Ying-shuang
	YANG Ya-bin
	JIANG Hong-ru
	WANG Hui

Cite this article:

ZHANG Ying-shuang,YANG Ya-bin,JIANG Hong-ru等. Regulating PVC and PET floatability based on surface reconstruction induced by environments[J]. CHINA ENVIRONMENTAL SCIENCECE, 2022, 42(2): 761-769.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2022/V42/I2/761

[1]	Lee Y, Hur J. Adsorption of microplastic-derived organic matter onto minerals[J]. Water Research, 2020,187:116426.
[2]	马思睿,李舒行,郭学涛.微塑料的老化特性、机制及其对污染物吸附影响的研究进展[J]. 中国环境科学, 2020,40(9):3992-4003. Ma S R, Li S X, Guo X T. A review on aging characteristics, mechanism of microplastics and their effects on the adsorption behaviors of pollutants[J]. China Environmental Science, 2020,40(9):3992-4003.
[3]	Zhang Y, Jiang H, Wan H, et al. Separation of hazardous polyvinyl chloride from waste plastics by flotation assisted with surface modification of ammonium persulfate:Process and mechanism[J]. Journal of Hazardous Materials, 2020,389:121918.
[4]	Zhao P, Zhang X, Gu F, et al. Bidirectional magnetic projection:one-step separation for recycling mixed wastes[J]. ACS Sustainable Chemical Engineering, 2020,8(29):10774−10785.
[5]	Zheng Y, Bai J, Xu J, et al. A discrimination model in waste plastics sorting using NIR hyperspectral imaging system[J]. Waste Management, 2018,72:87-98.
[6]	Wang Y, Zhang Y, Wang C. Surface modification and selective flotation of waste plastics for effective recycling-a review[J]. Separation and Purification Technology, 2019,226:75-94.
[7]	Zhang Y, Li C, Wang L, et al. Application of froth flotation in the separation of polyvinyl chloride and polycarbonate for recycling of waste plastic based on a novel surface modification[J]. Waste Management, 2020,110:43-52.
[8]	Jiang H, Zhang Y, Wang H. Surface reactions in selective modification:the prerequisite for plastic flotation[J]. Environmental Science and Technology, 2020,54(16):9742-9756.
[9]	Du Y, Zhang Y, Jiang H, et al. Hydrophilic modification of polycarbonate surface with surface alkoxylation pretreatment for efficient separation of polycarbonate and polystyrene by froth flotation[J]. Waste Management, 2020,118:471-480.
[10]	Zhang Y, Jiang H, Wang K, et al. Green flotation of polyethylene terephthalate and polyvinyl chloride assisted by surface modification of selective CaCO3 coating[J]. Journal Cleaner Production, 2020,242:118441.
[11]	Thanh Truc N, Lee B. Combining ZnO/microwave treatment for changing wettability of WEEE styrene plastics (ABS and HIPS) and their selective separation by froth flotation[J]. Applied Surface Science, 2017,420:746-752.
[12]	Wang J, Wang H, Huang L, et al. Surface treatment with Fenton for separation of acrylonitrile-butadiene-styrene and polyvinylchloride waste plastics by flotation[J]. Waste Management, 2017,67:20-26.
[13]	Ebbens S, Hodgkinson R, Parnell A, et al. InSitu imaging and height reconstruction of phase separation processes in polymer blends during spin coating[J]. ACS Nano, 2011,5(6):5124-5131.
[14]	Zhang X, Zhang C, Hankett J, et al. Molecular surface structural changes of plasticized PVC materials after plasma treatment[J]. Langmuir, 2013,29(12):4008-4018.
[15]	Zhang Y, Chen S, Wang H, et al. Separation of polyvinylchloride and acrylonitrile-butadiene-styrene combining advanced oxidation by S2O82-/Fe2+ system and flotation[J]. Waste Management, 2019,91:80-88.
[16]	Wang K, Zhang Y, Zhong Y, et al. Flotation separation of polyethylene terephthalate from waste packaging plastics through ethylene glycol pretreatment assisted by sonication[J]. Waste Management, 2020,105:309-316.
[17]	Chen S, Zhang Y, Guo C, et al. Separation of polyvinyl chloride from waste plastic mixtures by froth flotation after surface modification with sodium persulfate[J]. Journal Cleaner Production, 2019,218:167-172.
[18]	Zhang Y, Jiang H, Wang K, et al. Flotation separation of acrylonitrile-butadiene-styrene and polystyrene in WEEE based on oxidation of active sites[J]. Minerals Engineering, 2020,146:106131.
[19]	Jin H, Bai B, Wei W, et al. Hydrothermal liquefaction of polycarbonate (PC) plastics in sub-/supercritical water and reaction pathway exploration[J], ACS Sustainable Chemical Engineering, 2020,8(18):7039-7050.
[20]	Deng R, Liang F, Li W, et al. Reversible transformation of nanostructured polymer particles[J]. Macromolecules, 2013,46(17):7012-7017.
[21]	Zhou Y, Milner S. Average and local Tg shifts of plasticized PVC from simulations[J]. Macromolecules, 2018,51(10):3865-3873.
[22]	Zhao Y, Liu L, Zhao H. Surface reconstruction by a coassembly approach[J]. Angewandte Chemie International Edition, 2019,58(31):10577-10581.
[23]	Yasuda H, Sharma A. Effect of orientation and mobility of polymer molecules at surfaces on contact angle and its hysteresis[J]. Journal of Polymer Science:Polymer Physics Edition, 1981,19(9):1285-1291.
[24]	Roman-Ramirez L, McKeown P, Shah C, et al. Chemical degradation of end-of-life Poly(lactic acid) into methyl lactate by a Zn(II) complex[J]. Industrial Engineering Chemical Research, 2020,59(24):11149-11156.
[25]	Wang C, Wang H, Wu B, et al. Boiling treatment of ABS and PS plastics for flotation separation[J]. Waste Management, 2014,(7) 34:1206-1210.
[26]	李昱鹏,张志超,李声耀,等.氧等离子体改性聚乙烯表面的疏水性过回复机制[J]. 高等学校化学学报, 2014,35(8):1816-1821. Li Y P, Zhang Z C, Li S Y, et al. The mechanism of hydrophobic recovery of polyethylene surface modified by oxygen plasma[J]. Chemical Journal of Chinese University, 2014,35(8):1816-1821.