1
|
Lv K, Zhu Q, Yin H, Feng Y. Slow Curing of Epoxy Resin Underwater at High Temperatures. Ind Eng Chem Res 2022. [DOI: 10.1021/acs.iecr.2c02610] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Affiliation(s)
- Kun Lv
- Polymer Research Institute, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu610065, People’s Republic of China
| | - Qi Zhu
- CNPC Bohai Drilling Engineering Co., Ltd., Tianjin300450, People’s Republic of China
| | - Hongyao Yin
- Polymer Research Institute, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu610065, People’s Republic of China
| | - Yujun Feng
- Polymer Research Institute, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu610065, People’s Republic of China
| |
Collapse
|
2
|
Thermally Conductive and Antistatic Properties of Silicone Rubber Reinforced by the Modified Graphene Oxide. Polymers (Basel) 2022; 14:polym14214703. [DOI: 10.3390/polym14214703] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2022] [Revised: 10/21/2022] [Accepted: 10/26/2022] [Indexed: 11/06/2022] Open
Abstract
Silicone rubber (SR)/vinyl-graphene oxide (vinyl-GO) nanocomposites were prepared through the hydrosilylation reaction of silicon hydrogen polydimethylsiloxane (H-PDMS) with vinyl polydimethylsiloxane (vinyl-PDMS), in which vinyl-GO was used as a nano filler. The thermally conductive and antistatic properties of the nanocomposites, and their tensile strength and thermal stability were evaluated. The thermally conductive and antistatic properties increased naturally when the nanocomposites had eight to nine parts of vinyl-GO. The addition of 9 parts of vinyl-GO increased the thermal conductivity to 0.44 from 0.17 W/m−1·K−1 of neat SR and the surface resistance value to 108 from 1014 Ω of neat SR. Vinyl-GO is effective in improving the tensile strength and toughness of the nanocomposites. The tensile strength and elongation at break of the nanocomposites were much higher than that of neat SR, especially for 10 parts of vinyl-GO in the nanocomposite, and the tensile strength was 1.84 MPa and the elongation at break was 314.1%. Additionally, compared with neat SR, the nanocomposites had a much higher thermal stability. For eight parts of vinyl-GO in the nanocomposites, H-PDMS with the selected silicon hydrogen content and vinyl-PDMS with the selected vinyl content could offer an appropriate cross-linking degree that suits the character of GO. When the nanocomposite had eight parts of vinyl-GO, its scanning electron microscope exhibited a monolayer GO with folded, twisted, and local surface folds. However, there was a certain amount of multilayer aggregation of GO for 10 parts of vinyl-GO in the nanocomposite.
Collapse
|
3
|
Zhang X, Zhao T, Cao T, Liu P, Ma C, Li P, Huang D. Study on the compounding of a new type of trimer epoxy resin curing agent. J Appl Polym Sci 2022. [DOI: 10.1002/app.52368] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Xiongfei Zhang
- School of Chemistry and Chemical Engineering Changsha University of Science and Technology Changsha PR China
| | - Tianhui Zhao
- School of Chemistry and Chemical Engineering Changsha University of Science and Technology Changsha PR China
| | - Ting Cao
- School of Chemistry and Chemical Engineering Changsha University of Science and Technology Changsha PR China
| | - Peiyu Liu
- School of Chemistry and Chemical Engineering Changsha University of Science and Technology Changsha PR China
| | - Chuang Ma
- School of Chemistry and Chemical Engineering Changsha University of Science and Technology Changsha PR China
| | - Pengyun Li
- School of Chemistry and Chemical Engineering Changsha University of Science and Technology Changsha PR China
| | - Dang Huang
- School of Chemistry and Chemical Engineering Changsha University of Science and Technology Changsha PR China
| |
Collapse
|
4
|
Wilfong WC, Ji T, Duan Y, Shi F, Wang Q, Gray ML. Critical review of functionalized silica sorbent strategies for selective extraction of rare earth elements from acid mine drainage. JOURNAL OF HAZARDOUS MATERIALS 2022; 424:127625. [PMID: 34857400 DOI: 10.1016/j.jhazmat.2021.127625] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/29/2021] [Revised: 10/14/2021] [Accepted: 10/25/2021] [Indexed: 06/13/2023]
Abstract
The ubiquitous and growing global reliance on rare earth elements (REEs) for modern technology and the need for reliable domestic sources underscore the rising trend in REE-related research. Adsorption-based methods for REE recovery from liquid waste sources are well-positioned to compete with those of solvent extraction, both because of their expected lower negative environmental impact and simpler process operations. Functionalized silica represents a rising category of low cost and stable sorbents for heavy metal and REE recovery. These materials have collectively achieved high capacity and/or high selective removal of REEs from ideal solutions and synthetic or real coal wastewater and other leachate sources. These sorbents are competitive with conventional materials, such as ion exchange resins, activated carbon; and novel polymeric materials like ion-imprinted particles and metal organic frameworks (MOFs). This critical review first presents a data mining analysis for rare earth element recovery publications indexed in Web of science, highlighting changes in REE recovery research foci and confirming the sharply growing interest in functionalized silica sorbents. A detailed examination of sorbent formulation and operation strategies to selectively separate heavy (HREE), middle (MREE), and light (LREE) REEs from the aqueous sources is presented. Selectivity values for sorbents were largely calculated from available figure data and gauged the success of the associated strategies, primarily: (1) silane-grafted ligands, (2) impregnated ligands, and (3) bottom-up ligand/silica hybrids. These were often accompanied by successful co-strategies, especially bite angle control, site saturation, and selective REE elution. Recognizing the need to remove competing fouling metals to achieve purified REE "baskets," we highlight techniques for eliminating these species from acid mine drainage (AMD) and suggest a novel adsorption-based process for purified REE extraction that could be adapted to different water systems.
Collapse
Affiliation(s)
- Walter C Wilfong
- National Energy Technology Laboratory, 626 Cochrans Mill Road, P.O. Box 10940, Pittsburgh, PA 15236-0940, USA; NETL Support Contractor, 626 Cochrans Mill Road, P.O. Box 10940, Pittsburgh, PA 15236-0940, USA.
| | - Tuo Ji
- National Energy Technology Laboratory, 626 Cochrans Mill Road, P.O. Box 10940, Pittsburgh, PA 15236-0940, USA; NETL Support Contractor, 626 Cochrans Mill Road, P.O. Box 10940, Pittsburgh, PA 15236-0940, USA
| | - Yuhua Duan
- National Energy Technology Laboratory, 626 Cochrans Mill Road, P.O. Box 10940, Pittsburgh, PA 15236-0940, USA
| | - Fan Shi
- National Energy Technology Laboratory, 626 Cochrans Mill Road, P.O. Box 10940, Pittsburgh, PA 15236-0940, USA; NETL Support Contractor, 626 Cochrans Mill Road, P.O. Box 10940, Pittsburgh, PA 15236-0940, USA
| | - Qiuming Wang
- National Energy Technology Laboratory, 626 Cochrans Mill Road, P.O. Box 10940, Pittsburgh, PA 15236-0940, USA; NETL Support Contractor, 626 Cochrans Mill Road, P.O. Box 10940, Pittsburgh, PA 15236-0940, USA
| | - McMahan L Gray
- National Energy Technology Laboratory, 626 Cochrans Mill Road, P.O. Box 10940, Pittsburgh, PA 15236-0940, USA
| |
Collapse
|
5
|
Feng X, Wang J, Zhang C, Du Z, Li H, Zou W. Fabrication and characterization of antistatic epoxy composite with multi-walled carbon nanotube-functionalized melamine foam. RSC Adv 2018; 8:14740-14746. [PMID: 35541317 PMCID: PMC9079949 DOI: 10.1039/c8ra01044g] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2018] [Accepted: 04/04/2018] [Indexed: 01/05/2023] Open
Abstract
A novel strategy for synthesizing an antistatic epoxy composite was carried out.
Collapse
Affiliation(s)
- Xueliang Feng
- Key Laboratory of Carbon Fiber and Functional Polymers (Beijing University of Chemical Technology)
- Ministry of Education
- College of Materials Science and Engineering
- Beijing University of Chemical Technology
- Beijing 100029
| | - Jiangang Wang
- Key Laboratory of Carbon Fiber and Functional Polymers (Beijing University of Chemical Technology)
- Ministry of Education
- College of Materials Science and Engineering
- Beijing University of Chemical Technology
- Beijing 100029
| | - Chen Zhang
- Key Laboratory of Carbon Fiber and Functional Polymers (Beijing University of Chemical Technology)
- Ministry of Education
- College of Materials Science and Engineering
- Beijing University of Chemical Technology
- Beijing 100029
| | - Zhongjie Du
- Key Laboratory of Carbon Fiber and Functional Polymers (Beijing University of Chemical Technology)
- Ministry of Education
- College of Materials Science and Engineering
- Beijing University of Chemical Technology
- Beijing 100029
| | - Hangquan Li
- Key Laboratory of Carbon Fiber and Functional Polymers (Beijing University of Chemical Technology)
- Ministry of Education
- College of Materials Science and Engineering
- Beijing University of Chemical Technology
- Beijing 100029
| | - Wei Zou
- Key Laboratory of Carbon Fiber and Functional Polymers (Beijing University of Chemical Technology)
- Ministry of Education
- College of Materials Science and Engineering
- Beijing University of Chemical Technology
- Beijing 100029
| |
Collapse
|