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Zhi L, Sun H, Xu L, Cai Y. Distribution and Elimination of Trifluoropropylmethylsiloxane Oligomers in Both Biosolid-Amended Soils and Earthworms. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2021; 55:985-993. [PMID: 33356203 DOI: 10.1021/acs.est.0c05443] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
During a primary screening in 2015 and 2016, tris(trifluoropropyl)trimethylcyclotrisiloxane (D3F) and cis-/trans-tetrakis(trifluoropropyl)tetramethylcyclotetrasiloxane isomers (cis-D4F, trans-D4Fa,b,c) were detected in 12 biosolid-amended soils from Laixi and Shijiazhuang Cities of China, with mean concentrations being 10.3 ng/g dry weight (dw) and 2.7 ng/g dw for D3F and D4F, respectively. Subsequently, one further systematical survey found that although repeatedly amended by biosolids containing trifluoropropylmethylsiloxanes (4.2-724 ng/g dw), these compounds had no increasing trend in biosolid-amended soils (n = 100) collected from Laixi City at five sampling events from February 2017 to June 2019. Simulated experiments indicated that hydrolysis half-lives (1.8-28.0 days) of trifluoropropylmethylsiloxanes in soils were 3.0-18.3 times shorter than volatilization half-lives (7.4-362 days). Compared with those of octamethylcyclotetrasiloxane (D4), the hydrolysis rates of D4F isomers were faster in soils with total organic carbon (TOC) ≤80 mg/g but lower in soils with TOC ≥ 150 mg/g. In earthworm bodies, trifluoropropylmethylsiloxanes had 1.03-1.5 times lower biota-soil accumulation factors (1.3-3.2) but 1.4-3.0 times longer half-lives (2.6-5.7 days) than D4. The stronger persistence of fluorinated-siloxane than the corresponding dimethylsiloxane in both soils (at high TOC levels) and earthworms indicated that environmental risks of these compounds deserve further investigation.
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Affiliation(s)
- Liqin Zhi
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Science, Chinese Academy of Sciences, Beijing 100085, China
- Environmental Protection Research Institute of Light Industry, Beijing 100089, China
| | - Hongyu Sun
- School of Environmental and Municipal Engineering, Tianjin Chengjian University, Tianjin 300384, China
| | - Lin Xu
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Science, Chinese Academy of Sciences, Beijing 100085, China
| | - Yaqi Cai
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Science, Chinese Academy of Sciences, Beijing 100085, China
- Hubei Key Laboratory of Environmental and Health Effects of Persistence Toxic Substances, Institute of Environment and Health, Jianghan University, Wuhan 430056, China
- School of Environment, Hangzhou Institute for Advanced Study, UCAS, Hangzhou 330106, China
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Bont M, Barry C, Johnston S. A review of liquid silicone rubber injection molding: Process variables and process modeling. POLYM ENG SCI 2021. [DOI: 10.1002/pen.25618] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Matthew Bont
- Plastics Engineering Department University of Massachusetts Lowell Lowell Massachusetts USA
| | - Carol Barry
- Plastics Engineering Department University of Massachusetts Lowell Lowell Massachusetts USA
| | - Stephen Johnston
- Plastics Engineering Department University of Massachusetts Lowell Lowell Massachusetts USA
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Zhi L, Xu L, Qu Y, Zhang C, Cao D, Cai Y. Identification and Elimination of Fluorinated Methylsiloxanes in Environmental Matrices near a Manufacturing Plant in Eastern China. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2018; 52:12235-12243. [PMID: 30339022 DOI: 10.1021/acs.est.8b02508] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Fluorinated methylsiloxanes are modified methylsiloxanes and include tris(trifluoropropyl)trimethylcyclotrisiloxane (D3F) and tetrakis(trifluoropropyl)tetramethylcyclotetrasiloxane (D4F). Here, we report fluorinated methylsiloxanes (D3F and D4F) in surface water and sediment samples collected near a fluorinated methylsiloxane manufacturing plant in Weihai, China. The concentrations of D3F and D4F in surface water ranged from 3.29-291 ng/L and from 7.02-168 ng/L, respectively. The concentrations of D3F and D4F in sediment ranged from 11.8-5478 ng/g and from 17.2-6277 ng/g, respectively. In simulation experiment, the half-lives of D3F and D4F at different pH values (5.2, 6.4, 7.2, 8.3, and 9.2) varied from 80.6-154 h and from 267-533 h, respectively. CF3(CH2)2MeSi(OH)2 was identified as one of the main hydrolysis products of fluorinated methylsiloxanes. It was also detected in the river samples at concentrations of 72.1-182.9 ng/L. In addition, the slow rearrangement of D3F (spiked concentration = 500 ng/L) to D4F (concentration = 11.0-22.7 ng/L) was also found during 336h hydrolysis experiment.
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Affiliation(s)
- Liqin Zhi
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Science , Chinese Academy of Sciences , Beijing 100085 , China
- University of Chinese Academy of Sciences , Beijing 100049 , China
- Environmental Protection Research Institute of Light industry, Beijing 100089 , China
| | - Lin Xu
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Science , Chinese Academy of Sciences , Beijing 100085 , China
- University of Chinese Academy of Sciences , Beijing 100049 , China
| | - Yao Qu
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Science , Chinese Academy of Sciences , Beijing 100085 , China
- School of Chemical & Environmental Engineering , China University of Mining & Technology (Beijing) , Beijing 100083 , China
| | - Chunhui Zhang
- School of Chemical & Environmental Engineering , China University of Mining & Technology (Beijing) , Beijing 100083 , China
| | - Dong Cao
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Science , Chinese Academy of Sciences , Beijing 100085 , China
| | - Yaqi Cai
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Science , Chinese Academy of Sciences , Beijing 100085 , China
- University of Chinese Academy of Sciences , Beijing 100049 , China
- Institute of Environment and Health , Jianghan University , Wuhan 430056 , China
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Song Y, Zeng L, Guan A, Zheng Q. Time-concentration superpositioning principle accounting for reinforcement and dissipation of multi-walled carbon nanotubes filled polystyrene melts. POLYMER 2017. [DOI: 10.1016/j.polymer.2017.06.020] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Song Y, Zeng L, Zheng Q. Reconsideration of the Rheology of Silica Filled Natural Rubber Compounds. J Phys Chem B 2017; 121:5867-5875. [PMID: 28520426 DOI: 10.1021/acs.jpcb.7b02760] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
There is substantial progress along with giant debate in reinforcement mechanisms in relation to structured filler network and heterogeneously retarded polymer dynamics, while the dissipation behaviors have never been clarified for nanoparticle filled polymers. Herein dynamic rheological behaviors of silica filled natural rubber were investigated. Master curves of linear rheology in the hydrodynamic regime and those of the nonlinear Payne effect at a predetermined frequency were created, disclosing a leading role of dynamically retarded bulk rubbery phase to the hydrodynamic regime and a leading role of molecular disentanglement in the bulk phase to the Payne effect. The methodology is able to account for both reinforcement and dissipation of the compounds as a function of filler content. Furthermore, a frequency-dependent hydrodynamic to non-hydrodynamic transition is revealed, revealing the importance of the relaxation of chains in the bulk phase to both reinforcement and dissipation of the compounds. It is suggested that the dynamics of the bulk phase play a critical role for the rheology in the hydrodynamic regime while the fractal filler aggregates become dominative only in the terminal non-hydrodynamic regime where the bulk phase relaxes sufficiently.
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Affiliation(s)
- Yihu Song
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Key Laboratory of Adsorption and Separation Materials & Technologies of Zhejiang Province, Zhejiang University , Hangzhou 310027, China
| | - Lingbin Zeng
- Shanghai Aerospace System Engineering Institute , Shanghai 201110, China
| | - Qiang Zheng
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Key Laboratory of Adsorption and Separation Materials & Technologies of Zhejiang Province, Zhejiang University , Hangzhou 310027, China
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Jiang L, Hu K, Liu Z, Yuan Y, Zhou C, Lei J. Aliphatic Diamide as Novel Asphalt-Modified Epoxy Curing Agent for Enhanced Performance. ADVANCES IN POLYMER TECHNOLOGY 2016. [DOI: 10.1002/adv.21726] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Liang Jiang
- State Key Laboratory of Polymer Materials Engineering; Polymer Research Institute of Sichuan University; Chengdu 610065 China
| | - Kai Hu
- State Key Laboratory of Polymer Materials Engineering; Polymer Research Institute of Sichuan University; Chengdu 610065 China
| | - Zhimeng Liu
- State Key Laboratory of Polymer Materials Engineering; Polymer Research Institute of Sichuan University; Chengdu 610065 China
| | - Ye Yuan
- State Key Laboratory of Polymer Materials Engineering; Polymer Research Institute of Sichuan University; Chengdu 610065 China
| | - Changlin Zhou
- State Key Laboratory of Polymer Materials Engineering; Polymer Research Institute of Sichuan University; Chengdu 610065 China
| | - Jingxin Lei
- State Key Laboratory of Polymer Materials Engineering; Polymer Research Institute of Sichuan University; Chengdu 610065 China
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Fei HF, Gao X, Han X, Wang Q, Hu T, Zhang Z, Xie Z. Synthesis, characterization, and properties of vinyl-terminated copolysiloxanes containing trifluoropropyl and 4-trifluoromethylphenyl groups. ACTA ACUST UNITED AC 2015. [DOI: 10.1002/pola.27530] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Hua-Feng Fei
- Laboratory of Advanced Polymer Materials; Institute of Chemistry, Chinese Academy of Sciences; Beijing 100190 China
- College of Chemistry and Chemical Engineering; Graduate University of Chinese Academy of Sciences; Beijing 100049 China
| | - Xiyin Gao
- Laboratory of Advanced Polymer Materials; Institute of Chemistry, Chinese Academy of Sciences; Beijing 100190 China
| | - Xiaojie Han
- Laboratory of Advanced Polymer Materials; Institute of Chemistry, Chinese Academy of Sciences; Beijing 100190 China
- College of Chemistry and Chemical Engineering; Graduate University of Chinese Academy of Sciences; Beijing 100049 China
| | - Qian Wang
- Laboratory of Advanced Polymer Materials; Institute of Chemistry, Chinese Academy of Sciences; Beijing 100190 China
| | - Tao Hu
- Laboratory of Advanced Polymer Materials; Institute of Chemistry, Chinese Academy of Sciences; Beijing 100190 China
- College of Chemistry and Chemical Engineering; Graduate University of Chinese Academy of Sciences; Beijing 100049 China
| | - Zhijie Zhang
- Laboratory of Advanced Polymer Materials; Institute of Chemistry, Chinese Academy of Sciences; Beijing 100190 China
| | - Zemin Xie
- Laboratory of Advanced Polymer Materials; Institute of Chemistry, Chinese Academy of Sciences; Beijing 100190 China
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Fei HF, Xie W, Wang Q, Gao X, Hu T, Zhang Z, Xie Z. Controlled synthesis and characterization of poly[methyl(3,3,3-trifluoropropyl)siloxane] with selective end groups. RSC Adv 2014. [DOI: 10.1039/c4ra12268b] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Controlled polymerization method to synthesize poly[methyl(3,3,3-trifluoropropyl)siloxane] with narrow molar mass distribution, broad “termination window”, selective end groups and quantitative transformation.
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Affiliation(s)
- Hua-Feng Fei
- Beijing National Laboratory for Molecular Sciences (BNLMS)
- Institute of Chemistry
- Chinese Academy of Sciences
- Beijing 100190, China
- Graduate University of Chinese Academy of Sciences
| | - Wenchun Xie
- Beijing National Laboratory for Molecular Sciences (BNLMS)
- Institute of Chemistry
- Chinese Academy of Sciences
- Beijing 100190, China
| | - Qian Wang
- Beijing National Laboratory for Molecular Sciences (BNLMS)
- Institute of Chemistry
- Chinese Academy of Sciences
- Beijing 100190, China
| | - Xiyin Gao
- Beijing National Laboratory for Molecular Sciences (BNLMS)
- Institute of Chemistry
- Chinese Academy of Sciences
- Beijing 100190, China
- Graduate University of Chinese Academy of Sciences
| | - Tao Hu
- Beijing National Laboratory for Molecular Sciences (BNLMS)
- Institute of Chemistry
- Chinese Academy of Sciences
- Beijing 100190, China
- Graduate University of Chinese Academy of Sciences
| | - Zhijie Zhang
- Beijing National Laboratory for Molecular Sciences (BNLMS)
- Institute of Chemistry
- Chinese Academy of Sciences
- Beijing 100190, China
| | - Zemin Xie
- Beijing National Laboratory for Molecular Sciences (BNLMS)
- Institute of Chemistry
- Chinese Academy of Sciences
- Beijing 100190, China
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Kang Y, Chen Z, Jiao Z, Huang W. Rubber-like thermosetting epoxy asphalt composites exhibiting atypical yielding behaviors. J Appl Polym Sci 2010. [DOI: 10.1002/app.31563] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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