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Han Z, Xie Y, Ni C. Experimental Study of Salicylic Acid as a Calcium Sulfate Dihydrate Scale Inhibitor, Analyzed from Surface Properties and Crystal Growth. ACS OMEGA 2022; 7:34752-34762. [PMID: 36211063 PMCID: PMC9535717 DOI: 10.1021/acsomega.2c01262] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/02/2022] [Accepted: 09/06/2022] [Indexed: 06/16/2023]
Abstract
Static and dynamic experiments were carried out to study the antiscale performance of salicylic acid (SA) to calcium sulfate dihydrate (CSD) scale. The CSD scale formed in the reuse of processing of wastewater of phosphorite flotation. The scale surface physicochemical properties have been investigated by means of scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), ζ potential, and contact angle measurements. The antiscale mechanisms of SA to CSD were studied from surface properties and crystal growth. The results showed that the scale inhibition efficiency of SA to CSD reached 98.9% (6 mg/L) under static conditions. Under dynamic conditions, the faster the fluid velocity, the less CSD formed. The order of scaling capability on different material surfaces was 20#CS > 304SS > PC > PE. The growth of CSD was inhibited by SA resulting in the surface becoming porous. The deprotonated SA could easily interact with the Ca2+ to make the CSD surface potential negative. The wettability properties of the CSD are greatly improved when the contact angle is reduced. The surface tension values of CSD without and with 6 mg/L SA are 19.06 and 240.69 mN/m2, respectively. SA as a scale inhibitor can significantly inhibit crystallization of CSD.
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Zhao L, Zhang Q, Li X, Ye J, Chen J. Adsorption of Cu(II) by phosphogypsum modified with sodium dodecyl benzene sulfonate. JOURNAL OF HAZARDOUS MATERIALS 2020; 387:121808. [PMID: 31901841 DOI: 10.1016/j.jhazmat.2019.121808] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/01/2019] [Revised: 10/29/2019] [Accepted: 11/30/2019] [Indexed: 06/10/2023]
Abstract
Phosphogypsum (PG) is a solid waste generated during the wet production of phosphoric acid, and stockpiling PG causes serious pollution to the environment. Therefore, we prepared an adsorption material modified with sodium dodecyl benzene sulfonate (SDBS) based on PG (SDBS@PG). SDBS@PG can be regenerated and used in several adsorption-desorption cycles. The optimum conditions for Cu(II) removal are as follows: the Cu(II) concentration is 10 mg/L, the amount of adsorbent is 1.6 g/L, the pH is 6, and the contact time is 60 min. Under these conditions, the removal rate is 99.23 %. The kinetic data of adsorption conform to the pseudo-second-order model. The equilibrium isotherm results are consistent with the Langmuir isotherm equation. Furthermore, plausible mechanisms were proposed: PG was modified with SDBS, which greatly improved the adsorption of Cu(II) onto PG. The main reason is that SDBS is adsorbed on the surface of PG by chemical action in the form of micelles and then Cu(II) is adsorbed on the anionic SDBS micelles of SDBS@PG due to chemical and electrostatic interactions. This work indicates that SDBS@PG can be used for the removal of Cu(II) and is qualified for practical application.
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Affiliation(s)
- Lina Zhao
- College of Mining, Guizhou University, Guiyang, 550025, China; National & Local Joint Laboratory of Engineering for Effective Utilization of Regional Mineral Resources from Karst Areas, Guiyang, 550025, China; Guizhou Key Laboratory of Comprehensive Utilization of Nonmetallic Mineral Resources, Guiyang, 550025, China
| | - Qin Zhang
- College of Mining, Guizhou University, Guiyang, 550025, China; National & Local Joint Laboratory of Engineering for Effective Utilization of Regional Mineral Resources from Karst Areas, Guiyang, 550025, China; Guizhou Key Laboratory of Comprehensive Utilization of Nonmetallic Mineral Resources, Guiyang, 550025, China.
| | - Xianbo Li
- College of Mining, Guizhou University, Guiyang, 550025, China; National & Local Joint Laboratory of Engineering for Effective Utilization of Regional Mineral Resources from Karst Areas, Guiyang, 550025, China; Guizhou Key Laboratory of Comprehensive Utilization of Nonmetallic Mineral Resources, Guiyang, 550025, China
| | - Junjian Ye
- College of Mining, Guizhou University, Guiyang, 550025, China; National & Local Joint Laboratory of Engineering for Effective Utilization of Regional Mineral Resources from Karst Areas, Guiyang, 550025, China; Guizhou Key Laboratory of Comprehensive Utilization of Nonmetallic Mineral Resources, Guiyang, 550025, China
| | - Jiuyan Chen
- College of Mining, Guizhou University, Guiyang, 550025, China; National & Local Joint Laboratory of Engineering for Effective Utilization of Regional Mineral Resources from Karst Areas, Guiyang, 550025, China; Guizhou Key Laboratory of Comprehensive Utilization of Nonmetallic Mineral Resources, Guiyang, 550025, China
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Side-Chain Polyimides as Binder Polymers for Photolithographic Patterning of a Black Pixel Define Layer for Organic Light Emitting Diode. INT J POLYM SCI 2018. [DOI: 10.1155/2018/3790834] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
A pixel define layer (PDL) in an organic light emitting diode (OLED) is patterned using a photolithographic process before the deposition of organic layers on top of ITO anode. If the patterning of PDL on OLED panels can be achieved using a black photoresist, the patterning of black matrix (BM) on top of PDL patterns can be omitted by reducing the reflection of ambient light from OLED panels. In this study, we synthesized a series of side-chain-type polyimides as binder polymers of black photoresists and investigated the potential of using the black photoresist for the fine patterning of black PDL on OLED panels.
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Li H, Liu J, Zheng X, Ji C, Mu Q, Liu R, Liu X. Synthesis of a branched photosensitive copolymer and its application for negative-type photoresists. J Appl Polym Sci 2016. [DOI: 10.1002/app.42838] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Hu Li
- Key Laboratory of Food Colloids and Biotechnology (Ministry of Education), School of Chemical and Material Engineering; Jiangnan University; Wuxi 214122 China
| | - Jingcheng Liu
- Key Laboratory of Food Colloids and Biotechnology (Ministry of Education), School of Chemical and Material Engineering; Jiangnan University; Wuxi 214122 China
| | - Xiangfei Zheng
- Suzhou Rui Hong Electronic Chemicals Company, Limited; Suzhou Jiangsu 215124 China
| | - Changwei Ji
- Suzhou Rui Hong Electronic Chemicals Company, Limited; Suzhou Jiangsu 215124 China
| | - Qidao Mu
- Suzhou Rui Hong Electronic Chemicals Company, Limited; Suzhou Jiangsu 215124 China
| | - Ren Liu
- Key Laboratory of Food Colloids and Biotechnology (Ministry of Education), School of Chemical and Material Engineering; Jiangnan University; Wuxi 214122 China
| | - Xiaoya Liu
- Key Laboratory of Food Colloids and Biotechnology (Ministry of Education), School of Chemical and Material Engineering; Jiangnan University; Wuxi 214122 China
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Preparation and application of photosensitive copolymers for PDP barrier ribs formed by photolithography. CHINESE JOURNAL OF POLYMER SCIENCE 2012. [DOI: 10.1007/s10118-013-1232-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Themistou E, Patrickios CS. Degradable polymer networks and star polymers based on mixtures of two cleavable dimethacrylate crosslinkers: Synthesis, characterization, and degradation. ACTA ACUST UNITED AC 2009. [DOI: 10.1002/pola.23631] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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