[1]王力和,李继宁,邱金丽,等.三类典型塑料农膜在水环境中的自然老化与降解行为研究[J].南京师大学报(自然科学版),2023,46(02):131-139.[doi:10.3969/j.issn.1001-4616.2023.02.017]
　Wang Lihe,Li Jining,Qiu Jinli,et al.Natural Aging and Degradation Behaviors of the Three Kinds of Typical Plastic Agricultural Films in Water Environment[J].Journal of Nanjing Normal University(Natural Science Edition),2023,46(02):131-139.[doi:10.3969/j.issn.1001-4616.2023.02.017]
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三类典型塑料农膜在水环境中的自然老化与降解行为研究()
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《南京师大学报（自然科学版）》[ISSN:1001-4616/CN:32-1239/N]

卷:
第46卷
期数:
2023年02期
页码:
131-139
栏目:
环境科学与工程
出版日期:
2023-06-15

文章信息/Info

Title:
Natural Aging and Degradation Behaviors of the Three Kinds of Typical Plastic Agricultural Films in Water Environment
文章编号:
1001-4616(2023)02-0131-09
作者:
王力和1; 2; 李继宁1; 2; 邱金丽1; 2; 王风贺1; 2
(1.南京师范大学环境学院,江苏 南京 210023)
(2.江苏省环境风险防控与应急响应技术工程研究中心,江苏 南京 210023)
Author(s):
Wang Lihe1; 2; Li Jining1; 2; Qiu Jinli1; 2; Wang Fenghe1; 2
(1.School of Environment,Nanjing Normal University,Nanjing 210023,China)
(2.Jiangsu Province Engineering Research Center of Environmental Risk Prevention and Emergency Response Technology,Nanjing 210023,China)
关键词:
塑料农膜; 自然老化; 降解; 水环境
Keywords:
plastic agricultural films;  natural aging;  degradation;  water environment
分类号:
X71
DOI:
10.3969/j.issn.1001-4616.2023.02.017
文献标志码:
A
摘要:
本文以聚乳酸(PLA)、碳酸钙改性聚乙烯(CCF-PE)和聚乙烯(PE)塑料农膜作为研究对象,通过户外自然暴露法进行老化与降解,利用傅里叶变换红外光谱、微机控制电子万能试验机、扫描电子显微镜等表征手段,对三类典型塑料农膜的结构和性能进行分析检测,研究其在水环境中180 d的自然老化与降解行为. 研究结果表明:随着时间的延长,PLA和CCF-PE农膜的质量损耗率在实验前两个月增幅较快,而后上升趋势有所减缓,但PE农膜则一直保持平缓上升状态; 三类塑料农膜在降解过程中存在水质有机污染和微纳塑料污染风险上升的趋势; 三类塑料农膜断裂伸长率和拉伸强度均呈下降趋势,经过180 d老化与降解后,力学性能依次为PE农膜>PLA农膜>CCF-PE农膜; 三类塑料农膜原始表面平整光滑,无孔洞和裂纹,但经过180 d老化与降解后,PLA和PE农膜表面出现裂纹,CCF-PE农膜表面出现孔洞; 三类塑料农膜特征峰的强度均有所降低,表明其分子链发生断裂,分子量下降; PLA农膜主要发生的是光降解,CCF-PE农膜的CO2-3特征峰大幅度减弱,PE农膜中—CH2参与氧化反应.
Abstract:
In this paper, Polylactic acid(PLA), Calcium carbonate filled polyethylene(CCF-PE)and Polyethylene(PE)plastic agricultural films were used as research materials, and the aging and degradation experiments were carried out by natural outdoor exposure, using Fourier Transform Infrared Spectroscopy(FTIR), Electromechanical Universal Testing Machine, Scanning Electron Microscope(SEM)and other characterization methods to analyze the structure and properties of the three kinds of typical plastic agricultural films and study the aging and degradation behaviors of them in water environment for 180 days. The results showed that the mass loss rate of PLA and CCF-PE agricultural films increase rapidly in the first two months of the experiment, and then the increasing trend slowed down with the extension of time. However, PE agricultural films maintained a gentle rise. In the degradation process of three kinds of plastic agricultural films, the risk of water organic pollution and micro- and nano-plastic pollution was increasing. The breaking elongation rate and the tensile strength of three kinds of plastic agricultural films decreased and the mechanical properties followed the order of PE films>PLA films>CCF-PE films after 180 days of aging and degradation. The original surface of three kinds of plastic agricultural films was flat and smooth, without holes and cracks, but after 180 days of aging and degradation, cracks appeared on the surface of PLA and PE agricultural films and holes appeared on the surface of CCF-PE agricultural films. The intensity of all the specific peaks of three kinds of plastic agricultural films decreased, which indicated that the molecular chains were broken and the molecular weights were decreasing. PLA agricultural films were mainly photodegraded. The CO2-3 characteristic peaks of CCF-PE agricultural films were greatly reduced, and —CH2 in PE agricultural films were involved in the oxidation reaction.

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备注/Memo

备注/Memo:
收稿日期:2022-07-07.
基金项目:科技部高端外国专家引进计划项目(G2022014018).
通讯作者:王风贺,博士,教授,博士生导师,研究方向:水土环境污染控制与修复. E-mail:wangfenghe@njnu.edu.cn
更新日期/Last Update: 2023-06-15