1
|
Kazybayeva DS, Irmukhametova GS, Khutoryanskiy VV. Thiol-Ene “Click Reactions” as a Promising Approach to Polymer Materials. POLYMER SCIENCE SERIES B 2022. [DOI: 10.1134/s1560090422010055] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
|
2
|
High efficiency and simple preparation of polyacrylamide coated silica stationary phase for hydrophilic interaction liquid chromatography. J Chromatogr A 2019; 1605:360357. [PMID: 31345618 DOI: 10.1016/j.chroma.2019.07.011] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2019] [Revised: 07/05/2019] [Accepted: 07/06/2019] [Indexed: 11/23/2022]
Abstract
A polyacrylamide (PAM)-coated silica packing as a novel stationary phase for hydrophilic interaction liquid chromatography (HILIC) was produced firstly by thermal immobilization. The coated layer was formed by a simple and facile physical method that dipping silica spheres into a PAM solution and then stirring the mixture until the solution was evaporated absolutely, leaving a certain amount of PAM on the silica particles. Although there are no chemical bonds involved, the bleeding measurement and the background noise are acceptable. Polyacrylamide coated silica (PAM-Sil, mean diameter: 5 μm) demonstrated a good hydrophilic property and excellent separation efficiency, which was observed especially for several high polar analytes such as saccharides. It is much higher than bare silica or amino columns under the same conditions. Moreover the obtained stationary phase demonstrated good stability under our operation conditions. The specific preparing method offers an easy and economical way to manipulate the thickness of PAM coating and can be extended as a universal way to produce various polymer coated stationary phases with dipping-heating/stirring-evaporating procedure.
Collapse
|
3
|
Huang B, Jiang J, Kang M, Liu P, Sun H, Li BG, Wang WJ. Synthesis of block cationic polyacrylamide precursors using an aqueous RAFT dispersion polymerization. RSC Adv 2019; 9:12370-12383. [PMID: 35515873 PMCID: PMC9063656 DOI: 10.1039/c9ra02716e] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2019] [Accepted: 04/11/2019] [Indexed: 11/21/2022] Open
Abstract
Synthesis of cationic polyacrylamides (CPAMs) by introducing cationic polymer precursors followed by chain extension of acrylamide (AM) homopolymer blocks via RAFT polymerization is a promising approach for engineering high-performance CPAMs. However, the aqueous solution polymerization of AM usually leads to high viscosity, thus limiting the solid content in the polymerization system. Herein a novel approach is introduced that uses a random copolymer of AM and methacryloxyethyltrimethyl ammonium chloride (DMC) as a macro RAFT chain transfer agent (mCTA) and stabilizer for aqueous RAFT dispersion polymerization of AM. The AM/DMC random copolymers synthesized by RAFT solution polymerization, having narrow dispersities (Đ s) at different molecular weights and cationic degrees (C s), could serve as the mCTA, which was confirmed by mCTA chain extension in aqueous solution polymerization of AM under different C s, solid contents, AM addition contents, extended PAM block lengths, and mCTA chain lengths. The block CPAMs had a Đ value of less than 1.2. A model was developed using the method of moments with consideration of the diffusion control effect, for further understanding the chain extension kinetics. Predicted polymerization kinetics provided an accurate fit of the experimental data. The AM/DMC random copolymers were further used for aqueous RAFT dispersion polymerization of AM under different polymerization temperatures, C s, and mCTA chain lengths. The resulting products had a milky appearance, and the block copolymers had Đ s of less than 1.3. Higher C s and longer chain lengths on mCTAs were beneficial for stabilizing the polymerization systems and produced smaller particle sizes and less particle aggregation. The products remained stable at room temperature storage for more than a month. The results indicate that aqueous RAFT dispersion polymerization using random copolymers of AM and DMC at moderate cationic degrees as a stabilizer and mCTA is a suitable approach for synthesizing CPAM block precursors at an elevated solid content.
Collapse
Affiliation(s)
- Bo Huang
- State Key Lab of Chemical Engineering, College of Chemical and Biological Engineering, Zhejiang University 38 Zheda Road Hangzhou 310027 China
| | - Jie Jiang
- State Key Lab of Chemical Engineering, College of Chemical and Biological Engineering, Zhejiang University 38 Zheda Road Hangzhou 310027 China
| | - Mutian Kang
- State Key Lab of Chemical Engineering, College of Chemical and Biological Engineering, Zhejiang University 38 Zheda Road Hangzhou 310027 China
| | - Pingwei Liu
- State Key Lab of Chemical Engineering, College of Chemical and Biological Engineering, Zhejiang University 38 Zheda Road Hangzhou 310027 China .,Institute of Zhejiang University - Quzhou 78 Jiuhua Boulevard North Quzhou China 324000
| | - Hailong Sun
- State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University 24 South Section 1, Yihuan Road Chengdu China 610064
| | - Bo-Geng Li
- State Key Lab of Chemical Engineering, College of Chemical and Biological Engineering, Zhejiang University 38 Zheda Road Hangzhou 310027 China
| | - Wen-Jun Wang
- State Key Lab of Chemical Engineering, College of Chemical and Biological Engineering, Zhejiang University 38 Zheda Road Hangzhou 310027 China .,Institute of Zhejiang University - Quzhou 78 Jiuhua Boulevard North Quzhou China 324000
| |
Collapse
|
4
|
Cai J, Cheng L, Zhao J, Fu Q, Jin Y, Ke Y, Liang X. A polyacrylamide-based silica stationary phase for the separation of carbohydrates using alcohols as the weak eluent in hydrophilic interaction liquid chromatography. J Chromatogr A 2017; 1524:153-159. [PMID: 29030034 DOI: 10.1016/j.chroma.2017.10.005] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2017] [Revised: 09/20/2017] [Accepted: 10/02/2017] [Indexed: 01/28/2023]
Abstract
A hydrophilic interaction liquid chromatography (HILIC) stationary phase was prepared by a two-step synthesis method, immobilizing polyacrylamide on silica sphere particles. The stationary phase (named PA, 5μm dia) was evaluated using a mixture of carbohydrates in HILIC mode and the column efficiency reached 121,000Nm-1. The retention behavior of carbohydrates on PA stationary phase was investigated with three different organic solvents (acetonitrile, ethanol and methanol) employed as the weak eluent. The strongest hydrophilicity of PA stationary phase was observed in both acetonitrile and methanol as the weak eluent, when compared with another two amide stationary phases. Attributing to its high hydrophilicity, three oligosaccharides (xylooligosaccharide, fructooligosaccharide and chitooligosaccharides) presented good retention on PA stationary phase using alcohols/water as mobile phase. Finally, PA stationary phase was successfully applied for the purification of galactooligosaccharides and saponins of Paris polyphylla. It is feasible to use safer and cheaper alcohols to replace acetonitrile as the weak eluent for green analysis and purification of polar compounds on PA stationary phase.
Collapse
Affiliation(s)
- Jianfeng Cai
- Engineering Research Center of Pharmaceutical Process Chemistry, Ministry of Education, School of Pharmacy, East China University of Science and Technology, Shanghai 200237, PR China
| | - Lingping Cheng
- Engineering Research Center of Pharmaceutical Process Chemistry, Ministry of Education, School of Pharmacy, East China University of Science and Technology, Shanghai 200237, PR China
| | - Jianchao Zhao
- Engineering Research Center of Pharmaceutical Process Chemistry, Ministry of Education, School of Pharmacy, East China University of Science and Technology, Shanghai 200237, PR China
| | - Qing Fu
- Engineering Research Center of Pharmaceutical Process Chemistry, Ministry of Education, School of Pharmacy, East China University of Science and Technology, Shanghai 200237, PR China
| | - Yu Jin
- Engineering Research Center of Pharmaceutical Process Chemistry, Ministry of Education, School of Pharmacy, East China University of Science and Technology, Shanghai 200237, PR China.
| | - Yanxiong Ke
- Engineering Research Center of Pharmaceutical Process Chemistry, Ministry of Education, School of Pharmacy, East China University of Science and Technology, Shanghai 200237, PR China.
| | - Xinmiao Liang
- Engineering Research Center of Pharmaceutical Process Chemistry, Ministry of Education, School of Pharmacy, East China University of Science and Technology, Shanghai 200237, PR China; Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical, Physics, Chinese Academy of Science, Dalian 116203, PR China
| |
Collapse
|
5
|
TANG T, ZHANG WB, XU JW, XIA MZ, GONG XD, WANG FY, LI T. Preparation and Evaluation of a C18-Sulfonic Group Dual Modification Chromatographic Stationary Phase. CHINESE JOURNAL OF ANALYTICAL CHEMISTRY 2017. [DOI: 10.1016/s1872-2040(16)60989-1] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
|