Preparation and Characterization of Temperature and pH-Responsive P(N-vinylcaprolactam-crotonic Acid-2-hydroxyethyl acrylate/2-hydroxyethyl methacrylate) Hydrogels
{"title":"Preparation and Characterization of Temperature and pH-Responsive P(N-vinylcaprolactam-crotonic Acid-2-hydroxyethyl acrylate/2-hydroxyethyl methacrylate) Hydrogels","authors":"H. Ma, H. Shang, X. Duan, W. Ma, H. Liu, N. Qiao","doi":"10.1134/S1990793124020118","DOIUrl":null,"url":null,"abstract":"<p>The temperature and pH responsive hydrogels of the polymer(<i>N</i>-vinylcaprolactam-crotonic acid-2-hydroxyethyl acrylate) and polymer(<i>N</i>-vinylcaprolactam-crotonic acid-2-hydroxyethyl methacrylate) were prepared by free radical polymerization using <i>N</i>-vinylcaprolactam, crotonic acid, 2-hydroxyethyl acrylate and 2-hydroxyethyl methacrylate as raw materials. In the polymer(<i>N</i>-vinylcaprolactam-crotonic acid-2-hydroxyethyl acrylate/2-hydroxyethyl methacrylate) hydrogels, <i>N</i>-vinylcaprolactam is the temperature sensitive component, and crotonic acid is pH sensitive component. Six the polymer(<i>N</i>-vinylcaprolactam-crotonic acid-2-hydroxyethyl acrylate/2-hydroxyethyl methacrylate) hydrogels with different 2-hydroxyethyl acrylate/2-hydroxyethyl methacrylate contents were prepared. The chemical structure and morphology of the polymer(<i>N</i>-vinylcaprolactam-crotonic acid-2-hydroxyethyl acrylate/2-hydroxyethyl methacrylate) hydrogels were characterized by fourier transform infrared spectrum and scanning electron microscopy, respectively. The swelling kinetic curves and equilibrium swelling ratios under different temperature and pH of the polymer(<i>N</i>-vinylcaprolactam-crotonic acid-2-hydroxyethyl acrylate/2-hydroxyethyl methacrylate) hydrogels were tested. Mechanical properties of the two hydrogels were determined by compressive testing. Results show that the 2-hydroxyethyl acrylate/2-hydroxyethyl methacrylate content in the polymer(<i>N</i>-vinylcaprolactam-crotonic acid-2-hydroxyethyl acrylate/2-hydroxyethyl methacrylate) hydrogels affects the pore size, swelling ratio and mechanical properties. Compared with the polymer(<i>N</i>-vinylcaprolactam-crotonic acid-2-hydroxyethyl methacrylate) hydrogel, the polymer(<i>N</i>-vinylcaprolactam-crotonic acid-2-hydroxyethyl acrylate) hydrogel has higher swelling properties and mechanical properties due to its uniform network structure.</p>","PeriodicalId":768,"journal":{"name":"Russian Journal of Physical Chemistry B","volume":null,"pages":null},"PeriodicalIF":1.4000,"publicationDate":"2024-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Russian Journal of Physical Chemistry B","FirstCategoryId":"92","ListUrlMain":"https://link.springer.com/article/10.1134/S1990793124020118","RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"PHYSICS, ATOMIC, MOLECULAR & CHEMICAL","Score":null,"Total":0}
引用次数: 0
Abstract
The temperature and pH responsive hydrogels of the polymer(N-vinylcaprolactam-crotonic acid-2-hydroxyethyl acrylate) and polymer(N-vinylcaprolactam-crotonic acid-2-hydroxyethyl methacrylate) were prepared by free radical polymerization using N-vinylcaprolactam, crotonic acid, 2-hydroxyethyl acrylate and 2-hydroxyethyl methacrylate as raw materials. In the polymer(N-vinylcaprolactam-crotonic acid-2-hydroxyethyl acrylate/2-hydroxyethyl methacrylate) hydrogels, N-vinylcaprolactam is the temperature sensitive component, and crotonic acid is pH sensitive component. Six the polymer(N-vinylcaprolactam-crotonic acid-2-hydroxyethyl acrylate/2-hydroxyethyl methacrylate) hydrogels with different 2-hydroxyethyl acrylate/2-hydroxyethyl methacrylate contents were prepared. The chemical structure and morphology of the polymer(N-vinylcaprolactam-crotonic acid-2-hydroxyethyl acrylate/2-hydroxyethyl methacrylate) hydrogels were characterized by fourier transform infrared spectrum and scanning electron microscopy, respectively. The swelling kinetic curves and equilibrium swelling ratios under different temperature and pH of the polymer(N-vinylcaprolactam-crotonic acid-2-hydroxyethyl acrylate/2-hydroxyethyl methacrylate) hydrogels were tested. Mechanical properties of the two hydrogels were determined by compressive testing. Results show that the 2-hydroxyethyl acrylate/2-hydroxyethyl methacrylate content in the polymer(N-vinylcaprolactam-crotonic acid-2-hydroxyethyl acrylate/2-hydroxyethyl methacrylate) hydrogels affects the pore size, swelling ratio and mechanical properties. Compared with the polymer(N-vinylcaprolactam-crotonic acid-2-hydroxyethyl methacrylate) hydrogel, the polymer(N-vinylcaprolactam-crotonic acid-2-hydroxyethyl acrylate) hydrogel has higher swelling properties and mechanical properties due to its uniform network structure.
期刊介绍：
Russian Journal of Physical Chemistry B: Focus on Physics is a journal that publishes studies in the following areas: elementary physical and chemical processes; structure of chemical compounds, reactivity, effect of external field and environment on chemical transformations; molecular dynamics and molecular organization; dynamics and kinetics of photoand radiation-induced processes; mechanism of chemical reactions in gas and condensed phases and at interfaces; chain and thermal processes of ignition, combustion and detonation in gases, two-phase and condensed systems; shock waves; new physical methods of examining chemical reactions; and biological processes in chemical physics.
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