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Hanna DH, El-Mazaly MH, Mohamed RR. Synthesis of biodegradable antimicrobial pH-sensitive silver nanocomposites reliant on chitosan and carrageenan derivatives for 5-fluorouracil drug delivery toward HCT116 cancer cells. Int J Biol Macromol 2023; 231:123364. [PMID: 36693607 DOI: 10.1016/j.ijbiomac.2023.123364] [Citation(s) in RCA: 12] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2022] [Revised: 01/12/2023] [Accepted: 01/17/2023] [Indexed: 01/22/2023]
Abstract
The current research relies on a one-pot green biosynthesis of silver nanoparticles (SNPs) with various ratios of silver (Ag) in the existence of N, N, N-trimethyl chitosan chloride (TMC) and carboxymethyl kappa-carrageenan (CMKC), to investigate the effectiveness of the synthesized silver nanocomposites (SNCs) as pH sensitive biodegradable carrier for orally intestinal delivery of 5-fluorouracil (5-FU) drug. FTIR, XRD, TEM and FE-SEM/EDX methods were utilized to demonstrate the structure of the prepared polyelectrolyte complex PEC (TMC/CMKC) and SNCs (TMC/CMKC/Ag). The results showed that the 5-FU encapsulation effectiveness inside all of the prepared SNCs samples was improved by increasing the concentration of Ag, reaching 92.16 ± 0.57 % with 3 % Ag. In vitro release behavior of 5-FU loaded SNC 3 % (TMC/CMKC/Ag 3 %), displayed slow and sustained release reaching 96.3 ± 0.81 % up to 24 h into pH 7.4 medium. The successful release of 5-FU from the loaded SNC 3 % was confirmed through occurrence of strong cytotoxicity, with an IC50 value of 31.15 μg/ml, and high % of apoptotic cells (30.66 %) within the treated HCT116 cells. Besides, SNC 3 % showed good biodegradability and antimicrobial properties against different bacterial strains. Overall, SNC 3 % can be suggested as an effective system for both controlled drug delivery and antibacterial action.
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Affiliation(s)
- Demiana H Hanna
- Department of Chemistry, Faculty of Science, Cairo University, Giza 12613, Egypt.
| | - Marwa H El-Mazaly
- Department of Chemistry, Faculty of Science, Cairo University, Giza 12613, Egypt
| | - Riham R Mohamed
- Department of Chemistry, Faculty of Science, Cairo University, Giza 12613, Egypt
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2
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Zhang Q, Wang Q, Sun H, Zhu M, Wei Y, Kang X. Preparation and performances of a cationic modified polyacrylamide viscosity enhancer for water‐based drilling fluids. J Appl Polym Sci 2023. [DOI: 10.1002/app.53644] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Affiliation(s)
- Qin Zhang
- Changqing Drilling Branch CNPC Chuanqing Drilling Engineering Limited Company Xi'an China
| | - Qingchen Wang
- Changqing Drilling Branch CNPC Chuanqing Drilling Engineering Limited Company Xi'an China
| | - Huan Sun
- Changqing Drilling Branch CNPC Chuanqing Drilling Engineering Limited Company Xi'an China
| | - Mingming Zhu
- Changqing Drilling Branch CNPC Chuanqing Drilling Engineering Limited Company Xi'an China
| | - Yan Wei
- Changqing Drilling Branch CNPC Chuanqing Drilling Engineering Limited Company Xi'an China
| | - Xue Kang
- Changqing Drilling Branch CNPC Chuanqing Drilling Engineering Limited Company Xi'an China
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Wang Y, Ma L, Zhang Y. Thermal stability of cationic poly(3-methacryloylamino propyl trimethyl ammonium chloride) in salt solution. J MACROMOL SCI B 2022. [DOI: 10.1080/00222348.2022.2124751] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
Affiliation(s)
- Yongji Wang
- School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing, P.R. China
| | - Lupeng Ma
- School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing, P.R. China
| | - Yuejun Zhang
- School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing, P.R. China
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Lima BL, Marques NN, Souza EA, Balaban RC. Polysaccharide Derivative as an Additive in Olefin-Based Drilling Fluid. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.120023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Study on Hydrolysis Properties and Mechanism of Poly(3-Methacrylamido Propyl Trimethyl Ammonium Chloride) Solution. Polymers (Basel) 2022; 14:polym14142811. [PMID: 35890587 PMCID: PMC9318009 DOI: 10.3390/polym14142811] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2022] [Revised: 07/06/2022] [Accepted: 07/07/2022] [Indexed: 02/01/2023] Open
Abstract
Poly(3-methacrylamido propyl trimethyl ammonium chloride) (PMAPTAC) is a typical cationic water-soluble polyelectrolyte, which has been widely used in petroleum, papermaking, daily cosmetics and other fields in the form of an aqueous solution. However, the acid–base and thermal stability of PMAPTAC in aqueous solution have not been reported yet, which hinders its further application in high-temperature and acid–base environments. To address these deficiencies, the effects of temperature and pH of PMAPTAC with different intrinsic viscosities on its hydrolysis stability were investigated qualitatively and quantitatively, and the hydrolysis mechanism was studied. Firstly, the qualitative analysis showed that the apparent viscosity of the PMAPTAC solution decreased with hydrolysis time at different temperatures and pH. The higher the temperature and the lower the pH, the greater the viscosity loss of PMAPTAC. The quantitative analysis showed that the hydrolysis rate of the PMAPTAC sample solution increased with the increase in temperature and pH. In addition, the intrinsic viscosity of PMAPTAC samples had little effect on the hydrolytic stability of PMAPTAC. Secondly, by analyzing the viscosity curves at different pH and temperatures by Arrhenius analysis, the Arrhenius equations were found to be 1/τ = 200.34e^((−25.04)/RT), 1/τ = 9127.07e^((−38.90)/RT) and 1/τ = 4683.03e^((−39.89)/RT) for pH 3, pH 7 and pH 11, respectively. Thirdly, the hydrolysis rate of PDMC was the fastest under alkaline conditions. In addition, compared with PDMC, PMAPTAC had better hydrolysis stability under the same conditions. Finally, the mechanism of the hydrolyzed polymer was studied by FTIR and 13CNMR, which showed that the carbonyl group of PMAPTAC was hydrolyzed into a carboxyl group, and the small molecule (3-aminopropyl) trimethylammonium chloride was generated, while the ester group of PDMC was hydrolyzed into a carboxyl group, and choline chloride was released. The above results can provide a theoretical basis for the application of PMAPTAC in some high-temperature and acid–base environments.
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De Silva EH, Salamat N, Zhang L, Zheng J, Novak BM. Water-soluble polycarbodiimides and their cytotoxic and antifungal properties. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2021; 32:2369-2386. [PMID: 34428379 DOI: 10.1080/09205063.2021.1971821] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
We have successfully synthesized water-soluble neutral and polyelectrolyte helical polycarbodiimides and studied their biological properties. These polymers were prepared by decorating carbodiimide backbones with nonionic, hydrophilic functional groups such as dimethylamine, piperazine, and morpholine. Additionally, the 3° amines present in these functional groups were quaternized using methyl iodide as the alkylating agent to produce their ionic analogs. Polycarbodiimides were chosen as the base polymer used because of their facile chemical modification, pH tolerance in terms of both their helical conformations and degradation behaviors, and tunable helical inversion barriers. Hydrophilic side groups, such as morpholine, dimethylamine, and piperazine, can be used to balance the amphiphilic architecture of the polycarbodiimides along with lipophilic groups, such as alkyl side chains. A chiral R or S BINOL Ti(IV) isopropoxide catalyst was used to control the handedness of the polycarbodiimide helices in these studies. These ionic and neutral polycarbodiimides were subsequently studied for potential antimicrobial and cytotoxic properties. Poly[N-methyl-N'-2-morpholinoethylcarbodiimide], as an example, exhibited significant antifungal properties against Candida albicans. Also, Poly[N-methyl-N'-2-morpholinoethylcarbodiimide] showed significant inhibition of biofilm formation. This suggests that the polymer is a promising candidate for antifungal biomedical applications. Measuring cytotoxicity against urinary bladder cancer cells, poly[N-[3-(dimethylamino)propyl)]-N'-[3-(morpholino)propyl]carbodiimide] (S-cat) and poly[N-[3-(dimethylamino)propyl)]-N'-[3-(morpholino)propyl]carbodiimide]-MeI (S-cat) showed significantly low IC50 values. The IC50 values of poly[N-[3-(dimethylamino)propyl)]-N'-[3-(morpholino)propyl]carbodiimide] (S-cat) and Poly[N-[3-(dimethylamino)propyl)]-N'-[3-(morpholino)propyl]carbodiimide]-MeI (S-cat) are 3.50 μM and 1.27 μM, respectively. The significantly low cancer cell growth inhibition concentration implies the highest cytotoxicity of the polymers, suggesting potential applications as cancer therapeutics. These results also showed that the functionalization and chirality of polycarbodiimides modulate their anticancer and antifungal activity.
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Affiliation(s)
- Enosha Harshani De Silva
- Department of Chemistry and Biochemistry, The University of Texas at Dallas, Richardson, TX, USA
| | - Narges Salamat
- Department of Biological Sciences, The University of Texas at Dallas, Richardson, TX, USA
| | - Li Zhang
- Department of Biological Sciences, The University of Texas at Dallas, Richardson, TX, USA
| | - Jie Zheng
- Department of Chemistry and Biochemistry, The University of Texas at Dallas, Richardson, TX, USA
| | - Bruce M Novak
- Department of Chemistry and Biochemistry, The University of Texas at Dallas, Richardson, TX, USA
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Madruga LYC, Sabino RM, Santos ECG, Popat KC, Balaban RDC, Kipper MJ. Carboxymethyl-kappa-carrageenan: A study of biocompatibility, antioxidant and antibacterial activities. Int J Biol Macromol 2020; 152:483-491. [PMID: 32109473 DOI: 10.1016/j.ijbiomac.2020.02.274] [Citation(s) in RCA: 35] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2019] [Revised: 02/23/2020] [Accepted: 02/24/2020] [Indexed: 12/18/2022]
Abstract
Chemical modification of polysaccharides is an important route to enhance, develop or change polysaccharide properties. In this study, carboxymethylation of kappa-carrageenan (KC) with monochloroacetic acid was performed to achieve different degrees of substitution (DS) of carboxymethyl-kappa-carrageenan (CMKC). The degree of substitution ranged from 0.8 to 1.6 and was calculated from the 1H NMR spectra. The chemical structure of the CMKCs was further characterized by FT-IR, and 13C NMR. FT-IR confirmed the carboxymethylation. Carboxymethylation increased viscosity of KC in water and decreased viscosity of KC in synthetic human sweat. Tests with human adipose derived stem cells showed higher viability and lower cytotoxicity for CMKCs when compared to KC. CMKCs showed no hemolytic activity to human red blood cells. CMKCs have increased antioxidant activity compared to KC. In antibacterial assays, CMKCs with DS of 0.8, 1.0 and 1.2 exhibited growth inhibition against Staphylococcus aureus, Bacillus cereus, Escherichia coli and Pseudomonas aeruginosa. CMKC with DS ranging from 1.0 to 1.2 are good candidate biomaterials for cell-contacting applications.
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Affiliation(s)
- Liszt Y C Madruga
- Institute of Chemistry, Federal University of Rio Grande do Norte (UFRN), Natal, RN, Brazil; Laboratory of Immunoparasitology, College of Pharmacy, Federal University of Rio Grande do Norte (UFRN), Natal, RN, Brazil
| | - Roberta M Sabino
- School of Advanced Materials Discovery, Colorado State University, Fort Collins, CO, United States
| | - Elizabeth C G Santos
- Laboratory of Immunoparasitology, College of Pharmacy, Federal University of Rio Grande do Norte (UFRN), Natal, RN, Brazil
| | - Ketul C Popat
- School of Advanced Materials Discovery, Colorado State University, Fort Collins, CO, United States; Department of Mechanical Engineering, Colorado State University, Fort Collins, CO, United States; School of Biomedical Engineering, Colorado State University, Fort Collins, CO, United States
| | - Rosangela de C Balaban
- Institute of Chemistry, Federal University of Rio Grande do Norte (UFRN), Natal, RN, Brazil
| | - Matt J Kipper
- School of Advanced Materials Discovery, Colorado State University, Fort Collins, CO, United States; School of Biomedical Engineering, Colorado State University, Fort Collins, CO, United States; Department of Chemical and Biological Engineering, Colorado State University, Fort Collins, CO, United States.
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Measurement and Correlation of the Solubility of β-Cyclodextrin in Different Solutions at Different Temperatures and Thermodynamic Study of the Dissolution Process. Processes (Basel) 2019. [DOI: 10.3390/pr7030135] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
A new improved formulation was studied to improve the rehydration properties of freeze-dried dumplings. To provide basic data for industrial applications, the solubility capabilities of β-Cyclodextrin in sucrose, NaCl, and a mixed solution were measured at temperatures ranging from 303.15 to 353.15 K using a laser monitoring method. The experimental values indicated that the solubility of β-Cyclodextrin in solvents increased with increasing temperature. The simplified Apelblat model, Apelblat model, and λh model were employed to analyze the experimental results using correlation tests. The relative average deviation (RAD) values between the experimental and calculated values were less than 0.095, 0.075, and 0.103 for the simplified Apelblat equation, Apelblat equation, and λh equation, respectively. Apparent thermodynamic analysis of β-Cyclodextrin dissolution was also performed at the mean temperature using the model parameters of Apelblat equation. Furthermore, thermodynamic properties of the solution process, including the enthalpy, entropy, and Gibbs free energy, were also calculated and analyzed. This study provides the basic data for applications in industrial production, and is specifically of great significance for the improved formulation of freeze-dried dumplings.
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de Lima BLB, Marques NDN, Villetti MA, Balaban RDC. HPAM-g
-PEOPPO: Rheological modifiers in aqueous media of high temperature and high ionic strength. J Appl Polym Sci 2019. [DOI: 10.1002/app.47453] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Bruna Luiza Batista de Lima
- Laboratório de Pesquisa em Petróleo - LAPET; Universidade Federal do Rio Grande do Norte; 59078970 Natal Rio Grande do Norte Brazil
| | - Nívia do Nascimento Marques
- Laboratório de Pesquisa em Petróleo - LAPET; Universidade Federal do Rio Grande do Norte; 59078970 Natal Rio Grande do Norte Brazil
| | - Marcos Antônio Villetti
- Laboratório de Espectroscopia de Polímeros - LEPOL; Universidade Federal de Santa Maria; 97105-900 Santa Maria Rio Grande do Sul Brazil
| | - Rosangela de Carvalho Balaban
- Laboratório de Pesquisa em Petróleo - LAPET; Universidade Federal do Rio Grande do Norte; 59078970 Natal Rio Grande do Norte Brazil
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Polymer Injectivity: Investigation of Mechanical Degradation of Enhanced Oil Recovery Polymers Using In-Situ Rheology. ENERGIES 2018. [DOI: 10.3390/en12010049] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Water soluble polymers have attracted increasing interest in enhanced oil recovery (EOR) processes, especially polymer flooding. Despite the fact that the flow of polymer in porous medium has been a research subject for many decades with numerous publications, there are still some research areas that need progress. The prediction of polymer injectivity remains elusive. Polymers with similar shear viscosity might have different in-situ rheological behaviors and may be exposed to different degrees of mechanical degradation. Hence, determining polymer in-situ rheological behavior is of great significance for defining its utility. In this study, an investigation of rheological properties and mechanical degradation of different partially hydrolyzed polyacrylamide (HPAM) polymers was performed using Bentheimer sandstone outcrop cores. The results show that HPAM in-situ rheology is different from bulk rheology measured by a rheometer. Specifically, shear thickening behavior occurs at high rates, and near-Newtonian behavior is measured at low rates in porous media. This deviates strongly from the rheometer measurements. Polymer molecular weight and concentration influence its viscoelasticity and subsequently its flow characteristics in porous media. Exposure to mechanical degradation by flow at high rate through porous media leads to significant reduction in shear thickening and thereby improved injectivity. More importantly, the degraded polymer maintained in-situ viscosity at low flow rates indicating that improved injectivity can be achieved without compromising viscosity at reservoir flow rates. This is explained by a reduction in viscoelasticity. Mechanical degradation also leads to reduced residual resistance factor (RRF), especially for high polymer concentrations. For some of the polymer injections, successive degradation (increased degradation with transport length in porous media) was observed. The results presented here may be used to optimize polymer injectivity.
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