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Paoletti L, Baschieri F, Migliorini C, Di Meo C, Monasson O, Peroni E, Matricardi P. 3D printing of gellan-dextran methacrylate IPNs in glycerol and their bioadhesion by RGD derivatives. J Biomed Mater Res A 2024; 112:1107-1123. [PMID: 38433552 DOI: 10.1002/jbm.a.37698] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2023] [Revised: 02/14/2024] [Accepted: 02/22/2024] [Indexed: 03/05/2024]
Abstract
The ever-growing need for new tissue and organ replacement approaches paved the way for tissue engineering. Successful tissue regeneration requires an appropriate scaffold, which allows cell adhesion and provides mechanical support during tissue repair. In this light, an interpenetrating polymer network (IPN) system based on biocompatible polysaccharides, dextran (Dex) and gellan (Ge), was designed and proposed as a surface that facilitates cell adhesion in tissue engineering applications. The new matrix was developed in glycerol, an unconventional solvent, before the chemical functionalization of the polymer backbone, which provides the system with enhanced properties, such as increased stiffness and bioadhesiveness. Dex was modified introducing methacrylic groups, which are known to be sensitive to UV light. At the same time, Ge was functionalized with RGD moieties, known as promoters for cell adhesion. The printability of the systems was evaluated by exploiting the ability of glycerol to act as a co-initiator in the process, speeding up the kinetics of crosslinking. Following semi-IPNs formation, the solvent was removed by extensive solvent exchange with HEPES and CaCl2, leading to conversion into IPNs due to the ionic gelation of Ge chains. Mechanical properties were investigated and IPNs ability to promote osteoblasts adhesion was evaluated on thin-layer, 3D-printed disk films. Our results show a significant increase in adhesion on hydrogels decorated with RGD moieties, where osteoblasts adopted the spindle-shaped morphology typical of adherent mesenchymal cells. Our findings support the use of RGD-decorated Ge/Dex IPNs as new matrices able to support and facilitate cell adhesion in the perspective of bone tissue regeneration.
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Affiliation(s)
- Luca Paoletti
- Department of Drug Chemistry and Technologies, Sapienza University of Rome, Rome, Italy
| | - Francesco Baschieri
- Institute of Pathophysiology, Biocenter, Medical University of Innsbruck, Innsbruck, Austria
| | - Claudia Migliorini
- Department of Drug Chemistry and Technologies, Sapienza University of Rome, Rome, Italy
| | - Chiara Di Meo
- Department of Drug Chemistry and Technologies, Sapienza University of Rome, Rome, Italy
| | - Olivier Monasson
- CY Cergy Paris Université, CNRS, BioCIS, Cergy-Pontoise, France
- Université Paris-Saclay, CNRS, BioCIS, Châtenay-Malabry, France
| | - Elisa Peroni
- CY Cergy Paris Université, CNRS, BioCIS, Cergy-Pontoise, France
- Université Paris-Saclay, CNRS, BioCIS, Châtenay-Malabry, France
| | - Pietro Matricardi
- Department of Drug Chemistry and Technologies, Sapienza University of Rome, Rome, Italy
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An eco-friendly strategy using a double-current two-phase cell system for electrografting of polyacrylic acid. J Electroanal Chem (Lausanne) 2022. [DOI: 10.1016/j.jelechem.2022.116991] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Netto AJ, de Azevedo Silva AM, Bezerra LR, de Barros Carvalho A, da Silva Agostini DL, Vasconcelos de Oliveira DL, Mazzetto SE, Viana Kotzebue LR, Ribeiro Oliveira J, Oliveira RL, Pereira Filho JM, da Silva AL. Lipid microspheres containing urea for slow release of non-protein N in ruminant diets. ANIMAL PRODUCTION SCIENCE 2022. [DOI: 10.1071/an20694] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
ContextUrea is widely used in ruminant diets as a source of non-protein nitrogen (NPN), partially substituting for true protein in feed, but high levels of urea in the diet may cause toxicity.AimsThis study investigated the microencapsulation of urea in carnauba wax for slow release in the rumen to improve the N efficiency and growth of sheep.MethodsTwo microencapsulated systems were developed with urea:carnauba wax ratios (w/w) of 1:2 (U12) and 1:4 (U14). Based on the initial characterisation, only U12 was examined in an in vivo experiment with Santa Ines crossbred male sheep (n=40) initially weighing 28±0.6kg at 270 days of age. The experimental arrangement was a completely randomised design, and the animals were distributed into four treatments; i.e. four levels of inclusion (0, control; 15; 30; and 45g/kg DM) of microencapsulated urea in the diet.Key resultsThe dietary inclusion of microencapsulated urea was associated with linear increases (P≤0.05) in the intake of DM and metabolisable energy, the digestibility of crude protein, non-fibrous carbohydrates and fibre fractions, and N balance. Additionally, liveweight gain and feed efficiency increased quadratically (P<0.001). There were also linear reductions (P<0.001) in blood urea and urinary urea concentrations.ConclusionsThe study demonstrated that the inclusion of up to 30g/kg U12 microencapsulated urea can be recommended as a source of slow-release urea in sheep diets since it improved the performance and feed efficiency and promoted lower concentrations of blood urea and urinary urea.ImplicationsThe use of urea microencapsulated in carnauba wax can reduce the risk of urea toxicity and provide a safer way to supply NPN to ruminants and improve N utilisation.
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Wang P, Zhang W, Wang L, Fan S, Deng Y, Liang Q, Chen B. Synthesis of Superabsorbent Polymer Hydrogels with Rapid Swelling: Effect of Reaction Medium Dosage and Polyvinylpyrrolidone on Water Absorption Rate. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:14614-14621. [PMID: 34872248 DOI: 10.1021/acs.langmuir.1c02295] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
A superabsorbent polymer (SAP) was synthesized by solution polymerization. The influence of synthesis technology was studied and optimized, and FTIR, SEM, and TGA were used to characterize the structure and morphology of the material. Under the optimal synthesis conditions, the water absorption of the material can achieve about 80% of the saturation value in the first 20 min, and the material absorbs distilled water up to 2013 g/g. The SAP also has remarkable water retention and reswelling capability. The excellent performance makes it have a promising application in agriculture. In addition, the results show that the dosage of the reaction medium is a major factor for performance. Under the condition of the optimum value of other factors, the influence of the dosage of the reaction medium on water absorption can reach about 1000 g in distilled water.
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Affiliation(s)
- Peng Wang
- Key Laboratory of Eco-functional Polymer Materials of the Ministry of Education, Key Laboratory of Eco-environmental Polymer Materials of Gansu Province, College of Chemistry and Chemical Engineering, Northwest Normal University, 730070 Lanzhou, China
| | - Wenxu Zhang
- Key Laboratory of Eco-functional Polymer Materials of the Ministry of Education, Key Laboratory of Eco-environmental Polymer Materials of Gansu Province, College of Chemistry and Chemical Engineering, Northwest Normal University, 730070 Lanzhou, China
| | - Liang Wang
- Administration of Gansu Anxi Extra-arid Desert National Nature Reserve Service, 736100 Guazhou, China
| | - Suoting Fan
- Key Laboratory of Eco-functional Polymer Materials of the Ministry of Education, Key Laboratory of Eco-environmental Polymer Materials of Gansu Province, College of Chemistry and Chemical Engineering, Northwest Normal University, 730070 Lanzhou, China
| | - Yun Deng
- Key Laboratory of Eco-functional Polymer Materials of the Ministry of Education, Key Laboratory of Eco-environmental Polymer Materials of Gansu Province, College of Chemistry and Chemical Engineering, Northwest Normal University, 730070 Lanzhou, China
| | - Qian Liang
- Key Laboratory of Eco-functional Polymer Materials of the Ministry of Education, Key Laboratory of Eco-environmental Polymer Materials of Gansu Province, College of Chemistry and Chemical Engineering, Northwest Normal University, 730070 Lanzhou, China
| | - Bowen Chen
- Key Laboratory of Eco-functional Polymer Materials of the Ministry of Education, Key Laboratory of Eco-environmental Polymer Materials of Gansu Province, College of Chemistry and Chemical Engineering, Northwest Normal University, 730070 Lanzhou, China
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Copolymer Based on Polyglycerol-Acrylate-Lactate as Potential Water Viscosifier and Surfactant for Enhanced Oil Recovery. INT J POLYM SCI 2020. [DOI: 10.1155/2020/3464670] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Polymer and surfactant flooding are widely applied processes in enhanced oil recovery (EOR) in which viscous polymers or surfactants aqueous solutions are introduced in oil reservoirs to rise the recovery of the remaining oil. In this regard, one of the challenges of EOR practices is the use of efficient but low-cost viscosifier and surfactant polymers. This work is aimed at synthesizing a polyglycerol derived from the biodegradable and nontoxic monomer, glycerol, and evaluating the effect of its copolymerization on rheological and interfacial properties, which were tested in water and brine for the former and in the water/oil system for the last properties. The copolymers were synthesized using a polyglycerol backbone, acrylic acid, lactic acid, and oleic acid. The chemical structure of copolymers was characterized by Fourier transform infrared spectroscopy (FT-IR), thermogravimetry (TG), and differential scanning calorimetry (DSC). The viscosity and the interfacial tension (IFT) of polymeric solutions were tested. Thus, the viscosity and surface performance of the prepared polymer solutions in distilled water and brine were analyzed according to the structure of the synthesized polymers. The results showed that the synthesized polymers modified water viscosity and surface tension between water and oil. The developed polymers could be candidates for applications in enhanced oil recovery and related applications.
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de Medeiros TTB, de Azevedo Silva AM, da Silva AL, Bezerra LR, da Silva Agostini DL, de Oliveira DLV, Mazzetto SE, Kotzebue LRV, Oliveira JR, Souto GSB, de Barros Carvalho A, Netto AJ, Oliveira RL. Carnauba wax as a wall material for urea microencapsulation. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2019; 99:1078-1087. [PMID: 30022472 DOI: 10.1002/jsfa.9275] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/02/2017] [Revised: 05/27/2018] [Accepted: 07/15/2018] [Indexed: 06/08/2023]
Abstract
BACKGROUND The high ureolytic activity of rumen microbiota is a concern when urea is used in ruminant feed, because it leads to fast urea conversion, resulting in possible intoxication and lower nitrogen utilization. This study intended to microencapsulate urea using carnauba wax to obtain slow-release systems in the rumen. The experiment was conducted in a randomized block design, arranged in a 3 × 2 factorial, with the urea encapsulated with carnauba wax in ratios of 1 : 2; 1 : 3, and 1 : 4 (UME 2; UME 3, and UME 4) and two particles sizes (small, PS ; and large, PL ). RESULTS All formulations showed excellent properties, including inhibition of urea hygroscopicity. The formulation UME 2 exhibited the greatest yield (91.6%) and microencapsulation efficiency (99.6%) values, whereas the formulation UME 4 presented the greatest thermal stability (259.5 °C) and lowest moisture content (1.81%). The UME 2 formulation presented a slower release than the other UME formulations studied. CONCLUSION The production of urea microspheres using carnauba wax was successful for all microencapsulated systems developed, evidencing the promising potential for use in ruminant animal diets. The UME 2 formulation with large particles is the most recommended because it permitted greater resistance to microbial attack, allowing a slower release of urea into the rumen, reducing the risk of intoxication or ruminal alkalosis. © 2018 Society of Chemical Industry.
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Affiliation(s)
| | | | | | | | - Deuber L da Silva Agostini
- Department of Physics, Chemistry, and Biology, State University of São Paulo, Presidente Prudente, Brazil
| | | | - Selma E Mazzetto
- Department of Organic and Inorganic Chemistry, Federal University of Ceará, Fortaleza, Brazil
| | - Lloyd R Viana Kotzebue
- Department of Organic and Inorganic Chemistry, Federal University of Ceará, Fortaleza, Brazil
| | | | | | | | - Antonio J Netto
- Department of Animal Science, Federal University of Campina Grande, Patos, Brazil
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Fernandes BS, Pinto JC, Cabral-Albuquerque ECDM, Fialho RLL. Coating of urea granules by in situ polymerization in fluidized bed reactors. POLIMEROS 2019. [DOI: 10.1590/0104-1428.06617] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Alexander W, Wickson J, Duncan J, Carmichael K, Irvine D, Howdle S. Synthesis and control of crosslinked poly(acrylic acid) based viscosity modifiers using dense phase carbon dioxide as a solvent. J Supercrit Fluids 2018. [DOI: 10.1016/j.supflu.2018.05.003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Landim LB, Pinto JC, Cabral-Albuquerque EC, Cunha S, Fialho RL. Synthesis and characterization of copolymers of urea-succinic acid-ethylene glycol and copolymers of urea-succinic acid-glycerol. POLYM ENG SCI 2018. [DOI: 10.1002/pen.24746] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Lucas B. Landim
- Universidade Federal da Bahia/Programa de Pós-graduação em Engenharia Industrial, Escola Politécnica, Rua Aristides Novis, n° 02; Federação, CEP: 40.210-630 Salvador/BA Brasil
| | - José Carlos Pinto
- Universidade Federal do Rio de Janeiro/Programa de Pós-graduação em Engenharia Química-COPPE, Cidade Universitária, CP: 68502; Rio de Janeiro, 21.941-972 RJ Brasil
| | - Elaine C.M. Cabral-Albuquerque
- Universidade Federal da Bahia/Programa de Pós-graduação em Engenharia Industrial, Escola Politécnica, Rua Aristides Novis, n° 02; Federação, CEP: 40.210-630 Salvador/BA Brasil
| | - Silvio Cunha
- Instituto de Química; Universidade Federal da Bahia/Programa de Pós-graduação em Química, Rua Barão de Jeremoabo, n° 147; Ondina, CEP: 40.170-115 Salvador/BA Brasil
| | - Rosana L. Fialho
- Universidade Federal da Bahia/Programa de Pós-graduação em Engenharia Industrial, Escola Politécnica, Rua Aristides Novis, n° 02; Federação, CEP: 40.210-630 Salvador/BA Brasil
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