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Yun S, Chabert AJ, Militz H. Fixation of Tripotassium Citrate Flame Retardant Using a Sorbitol and Citric Acid Wood-Modification Treatment. MATERIALS (BASEL, SWITZERLAND) 2024; 17:5377. [PMID: 39517651 PMCID: PMC11547926 DOI: 10.3390/ma17215377] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/03/2024] [Revised: 10/23/2024] [Accepted: 10/25/2024] [Indexed: 11/16/2024]
Abstract
Wood modification has been explored in various ways to enhance dimensional stability and reduce flammability, with a focus on environmentally friendly treatments to meet market demands. This study aimed to investigate the efficacy of new, potential fire-retardant materials. Specifically, the study examined the combination of tripotassium citrate (TPC), a water-soluble and bio-based fire retardant, with sorbitol and citric acid (SorCA), an eco-friendly thermosetting resin previously studied. While TPC is known to control combustion, its application in wood modification has not been thoroughly researched. To assess the fixation and flammability of these fire retardants, tests were conducted on Scots Pine (Pinus sylvestris L.), including chemical analysis, dimensional stability, mechanical properties, flame retardancy, and leaching tests. The combination of SorCA and TPC showed high weight percent gain (WPG) values; however, leaching and anti-swelling efficiency (ASE) tests revealed challenges in fixation stability. The dynamic mechanical properties were reduced, whereas the static strength values were in the same range compared with untreated wood. While TPC exhibited high flame retardancy prior to leaching, its efficacy diminished post-leaching, underscoring challenges in fixation and the need for improved retention strategies. Bunsen burner tests conducted on leached specimens indicated enhanced performance even under severe leaching conditions as per the EN 84:2020 procedure. However, cone calorimetry measurements showed less favorable outcomes, emphasizing the necessity for further investigation into optimizing TPC retention and enhancing treatment efficacy.
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Affiliation(s)
| | | | - Holger Militz
- Department of Wood Biology and Wood Products, Faculty of Forest Sciences and Forest Ecology, University of Göttingen, Büsgenweg 4, 37077 Göttingen, Germany
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2
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Qiu Y, Hu C, Li J, Lai Q, Liu Z, Lin X, Zhang W. Cell Wall Modification Based on Combination Reagents to Improve Dimensional Stability of Wood with High Efficiency. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2024; 72:14601-14609. [PMID: 38900413 DOI: 10.1021/acs.jafc.4c02876] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/21/2024]
Abstract
Although γ-methacryloxypropyltrimethoxysilane (MPS) was proved to be an effective reagent for improving the dimensional stability of wood, a bottleneck in ASE value (around 50%) existed. The reason was that MPS with low polarity opened few hydrogen bonds in the amorphous region of cellulose, while these hydrogen bonds could be reopened by water. Therefore, citric acid (CA) is chosen to cooperate with MPS to further enhance the dimensional stability of wood. In this paper, MPS and CA were used to modify wood individually (MW and CW) or with different combinations, that is, one-step modification (M/CW) and two-step modification with MPS first (M-CW) or CA first (C-MW). CA and MPS concentrations were optimized at 5 wt%. The ASE value for M/CW was only 25.74% at a weight percent gain (WPG) of 6.43%, which was only 0.6 times to MW or 0.7 times to CW. For M-CW, the ASE value gradually decreased with the soaking cycles, from 65.64% at a WPG of 9.05% to 51.20%. The C-MW had the best dimensional stability, with the ASE value 75.35% at a WPG of 11.50%. Although it decreased during the first soaking cycle, it stabilized at 62.20% at last. SEM and EDS images showed that the polymer mainly distributed in cell walls and few in cell lumen in C-MW. Thus, the enhanced dimensional stability of C-MW could be explained by CA opening the hydrogen bonds in the amorphous region of cellulose first, which provided more binding sites for MPS.
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Affiliation(s)
- Yuhan Qiu
- Key Laboratory for Biobased Materials and Energy of Ministry of Education, College of Materials and Energy, South China Agricultural University, Guangzhou 510642, China
| | - Chuanshuang Hu
- Key Laboratory for Biobased Materials and Energy of Ministry of Education, College of Materials and Energy, South China Agricultural University, Guangzhou 510642, China
| | - Jiewen Li
- Key Laboratory for Biobased Materials and Energy of Ministry of Education, College of Materials and Energy, South China Agricultural University, Guangzhou 510642, China
| | - Qin Lai
- Key Laboratory for Biobased Materials and Energy of Ministry of Education, College of Materials and Energy, South China Agricultural University, Guangzhou 510642, China
| | - Ziling Liu
- Key Laboratory for Biobased Materials and Energy of Ministry of Education, College of Materials and Energy, South China Agricultural University, Guangzhou 510642, China
| | - Xiuyi Lin
- Key Laboratory for Biobased Materials and Energy of Ministry of Education, College of Materials and Energy, South China Agricultural University, Guangzhou 510642, China
| | - Weiwei Zhang
- Key Laboratory for Biobased Materials and Energy of Ministry of Education, College of Materials and Energy, South China Agricultural University, Guangzhou 510642, China
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3
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Scharf A, Popescu CM, Dernegård H, Oja J, Ormondroyd G, Medved S, Sandberg D, Jones D. Particleboards Bonded by an Imidazole-Based Adhesive System. MATERIALS (BASEL, SWITZERLAND) 2023; 16:7201. [PMID: 38005130 PMCID: PMC10673158 DOI: 10.3390/ma16227201] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/28/2023] [Revised: 11/14/2023] [Accepted: 11/15/2023] [Indexed: 11/26/2023]
Abstract
Particleboards with different combinations of the adhesive material imidazole, citric acid, and sorbitol were produced. Softwood sawdust from a Swedish sawmill was mixed with an aqueous solution of the chemicals and then dried to 0% moisture content prior to pressing. The boards were pressed to a target density of 700 kg m-3 at either 200 °C or 220 °C for 10 min. The hygroscopic and mechanical properties of the boards were clearly better at 220 °C than 200 °C for all used chemical combinations. A combination of imidazole (14.4 wt%) and citric acid (11.3 wt%) led to the best results, where the thickness swelling after 24 h of water immersion was 6.3% and the internal bonding strength was 0.57 MPa. The modulus of rupture and modulus of elasticity were 3.3 MPa and 1.1 GPa, respectively. Cyclic accelerated weathering showed exceptional stability with a thickness change after boiling and drying of only 2.1% compared to the initial dry thickness. This study indicates that the presence of imidazole leads to greatly improved hygroscopic properties and good internal bonding strength when used in particleboards.
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Affiliation(s)
- Alexander Scharf
- Wood Science and Engineering, Luleå University of Technology, Forskargatan 1, SE-93187 Skellefteå, Sweden; (D.S.); (D.J.)
| | - Carmen-Mihaela Popescu
- Petru Poni Institute of Macromolecular Chemistry, 41A Grigore Ghica Voda Alley, 700487 Iasi, Romania;
| | | | - Johan Oja
- Norra Timber, Skeppargatan 1, SE-90403 Umeå, Sweden;
| | - Graham Ormondroyd
- Biocomposites Centre, Bangor University, Deiniol Road, Bangor LL57 2UW, UK;
| | - Sergej Medved
- Biotechnical Faculty, University of Ljubljana, Jamnikarjeva 101, 1000 Ljubljana, Slovenia;
| | - Dick Sandberg
- Wood Science and Engineering, Luleå University of Technology, Forskargatan 1, SE-93187 Skellefteå, Sweden; (D.S.); (D.J.)
| | - Dennis Jones
- Wood Science and Engineering, Luleå University of Technology, Forskargatan 1, SE-93187 Skellefteå, Sweden; (D.S.); (D.J.)
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Antimicrobial Functionalization of Prolamine-Silica Hybrid Coatings with Fumaric Acid for Food Packaging Materials and Their Biocompatibility. Antibiotics (Basel) 2022; 11:antibiotics11091259. [PMID: 36140038 PMCID: PMC9495839 DOI: 10.3390/antibiotics11091259] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2022] [Revised: 09/10/2022] [Accepted: 09/10/2022] [Indexed: 11/16/2022] Open
Abstract
The interest of the food packaging industry in biodegradable, recyclable, and functional materials has steadily increased in recent years. The use of hydrogels in the food sector holds great potential for use in packaging systems or as carriers for bioactive substances. The synthesis of an oxygen barrier coating of prolaminic silica material and antimicrobial functionalization with fumaric acid for packaging materials described here is an elegant way to meet these requirements. The developed material achieved a significant antimicrobial activity against Escherichia coli and Staphylococcus aureus, two common clinical pathogens. Another pre-requisite of such materials is a high biocompatibility, which can be assessed using human cell models, to help ensure consumer safety. The biocompatibility was determined by luminescence adenosine triphosphate and photometric lactate dehydrogenase assays. No cytotoxic effects on human keratinocytes in vitro were found for the test materials.
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Hadinugroho W, Martodihardjo S, Fudholi A, Riyanto S. Preparation of Citric Acid-Locust Bean Gum (CA-LBG) for the Disintegrating Agent of Tablet Dosage Forms. J Pharm Innov 2021. [DOI: 10.1007/s12247-021-09591-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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6
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Duaux G, Fleury E, Portinha D. Biobased poly(ester- co-glycoside) from reactive natural Brønsted acidic deep eutectic solvent analogue. Polym Chem 2021. [DOI: 10.1039/d1py00990g] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
{glucose : malic acid : water} [(1 : 1 : x), x ≤ 9] mixtures are Brønsted Acidic Natural Low Transition Temperature (NaLTTM) that react in solvent/catalyst free conditions to prepare all-natural poly(ester-co-glycoside) branched and crosslinked polymers.
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Affiliation(s)
- Gabriel Duaux
- Université de Lyon CNRS, UMR 5223, INSA-Lyon, IMP@INSA, Villeurbanne F-69621, France
| | - Etienne Fleury
- Université de Lyon CNRS, UMR 5223, INSA-Lyon, IMP@INSA, Villeurbanne F-69621, France
| | - Daniel Portinha
- Université de Lyon CNRS, UMR 5223, INSA-Lyon, IMP@INSA, Villeurbanne F-69621, France
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Lee SH, Md Tahir P, Lum WC, Tan LP, Bawon P, Park BD, Osman Al Edrus SS, Abdullah UH. A Review on Citric Acid as Green Modifying Agent and Binder for Wood. Polymers (Basel) 2020; 12:polym12081692. [PMID: 32751175 PMCID: PMC7464553 DOI: 10.3390/polym12081692] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2020] [Revised: 07/23/2020] [Accepted: 07/27/2020] [Indexed: 12/15/2022] Open
Abstract
Citric acid (CA) can be found naturally in fruits and vegetables, particularly citrus fruit. CA is widely used in many fields but its usage as a green modifying agent and binder for wood is barely addressed. Esterification is one of the most common chemical reactions applied in wood modification. CA contains three carboxyl groups, making it possible to attain at least two esterification reactions that are required for crosslinking when reacting with the hydroxyl groups of the cell wall polymers. In addition, the reaction could form ester linkages to bring adhesivity and good bonding characteristics, and therefore CA could be used as wood binder too. This paper presents a review concerning the usage of CA as a wood modifying agent and binder. For wood modification, the reaction mechanism between wood and CA and the pros and cons of using CA are discussed. CA and its combination with various reactants and their respective optimum parameters are also compiled in this paper. As for the major wood bonding component, the bonding mechanism and types of wood composites bonded with CA are presented. The best working conditions for the CA in the fabrication of wood-based panels are discussed. In addition, the environmental impacts and future outlook of CA-treated wood and bonded composite are also considered.
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Affiliation(s)
- Seng Hua Lee
- Institute of Tropical Forestry and Forest Products (INTROP), Universiti Putra Malaysia, Serdang 43400 UPM, Selangor, Malaysia; (P.M.T.); (S.S.O.A.E.)
- Correspondence: (S.H.L.); (L.P.T.); (P.B.)
| | - Paridah Md Tahir
- Institute of Tropical Forestry and Forest Products (INTROP), Universiti Putra Malaysia, Serdang 43400 UPM, Selangor, Malaysia; (P.M.T.); (S.S.O.A.E.)
| | - Wei Chen Lum
- Institute for Infrastructure Engineering and Sustainable Management (IIESM), Universiti Teknologi MARA, Shah Alam 40450, Selangor, Malaysia;
| | - Li Peng Tan
- Faculty of Veterinary Medicine, Universiti Malaysia Kelantan, Pengkalan Chepa, Kota Bharu 16100, Kelantan, Malaysia
- Correspondence: (S.H.L.); (L.P.T.); (P.B.)
| | - Paiman Bawon
- Faculty of Forestry and Environment, Universiti Putra Malaysia, Serdang 43400 UPM, Selangor, Malaysia;
- Correspondence: (S.H.L.); (L.P.T.); (P.B.)
| | - Byung-Dae Park
- Department of Wood and Paper Science, Kyungpook National University, Daegu 41566, Korea;
| | - Syeed SaifulAzry Osman Al Edrus
- Institute of Tropical Forestry and Forest Products (INTROP), Universiti Putra Malaysia, Serdang 43400 UPM, Selangor, Malaysia; (P.M.T.); (S.S.O.A.E.)
| | - Ummi Hani Abdullah
- Faculty of Forestry and Environment, Universiti Putra Malaysia, Serdang 43400 UPM, Selangor, Malaysia;
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8
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Leachability and Decay Resistance of Wood Polyesterified with Sorbitol and Citric Acid. FORESTS 2020. [DOI: 10.3390/f11060650] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Research Highlights: Polyesterification of wood with sorbitol and citric acid (SCA) increases decay resistance against brown-rot and white-rot fungi without reducing cell wall moisture content but the SCA polymer is susceptible to hydrolysis. Background and Objectives: SCA polyesterification is a low-cost, bio-based chemical wood modification system with potential for commercialisation. Materials and Methods: This study investigates moisture-related properties and decay resistance in SCA-modified wood. Scots pine sapwood was polyesterified at 140 °C with various SCA solution concentrations ranging from 14–56% w/w. Dimensional stability was assessed and leachates were analysed with high-performance liquid chromatography (HPLC). Chemical changes were characterized with attenuated total reflection Fourier-transform infrared spectroscopy (ATR-FTIR) and spectra were quantitatively compared with peak ratios. Low-field nuclear magnetic resonance (LFNMR) relaxometry was used to assess water saturated samples and decay resistance was determined with a modified EN113 test. Results: Anti-swelling efficiency (ASE) ranged from 23–43% and decreased at higher weight percentage gains (WPG). Reduced ASE at higher WPG resulted from increased water saturated volumes for higher treatment levels. HPLC analysis of leachates showed detectable citric acid levels even after an EN84 leaching procedure. ATR-FTIR analysis indicated increased ester content in the SCA-modified samples and decreased hydroxyl content compared to controls. Cell wall water assessed by non-freezing moisture content determined with LFNMR was found to increase because of the modification. SCA-modified samples resisted brown-rot and white-rot decay, with a potential decay threshold of 50% WPG. Sterile reference samples incubated without fungi revealed substantial mass loss due to leaching of the samples in a high humidity environment. The susceptibility of the SCA polymer to hydrolysis was confirmed by analysing the sorption behaviour of the pure polymer in a dynamic vapour sorption apparatus. Conclusions: SCA wood modification is an effective means for imparting decay resistance but, using the curing parameters in the current study, prolonged low-level leaching due to hydrolysis of the SCA polymer remains a problem.
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Hadinugroho W, Martodihardjo S, Fudholi A, Riyanto S. Esterification of citric acid with locust bean gum. Heliyon 2019; 5:e02337. [PMID: 31485527 PMCID: PMC6716352 DOI: 10.1016/j.heliyon.2019.e02337] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2019] [Revised: 07/02/2019] [Accepted: 08/15/2019] [Indexed: 12/02/2022] Open
Abstract
Esterification of citric acid (CA) with locust bean gum (LBG) was prepared by hydrochloric acid (HCl) as a catalyst and UV irradiation (254 nm) as esterification energy. This study aims to determine the best conditions of esterification. Other than that, it is to know the effect of amount HCl and UV irradiation time for the esterification process of CA with LBG. The amounts of HCl are 0.18 and 0.30 M, while the variations of UV irradiation time are 75 and 100 minutes. Polyester (CA-LBG) were characterized by Fourier transform infrared spectroscopy (FTIR), nuclear magnetic resonance (NMR), scanning electron microscopy (SEM), differential scanning calorimetry (DSC), X-ray diffractometer (XRD), esterification degree, and viscosity. Parameters for determining the best conditions for esterification are esterification degree and viscosity. The best conditions of esterification were obtained by using 0.30 M mL HCl and 100 minutes of UV irradiation time resulted in CA-LBG having a value of esterification degree 9.69 % and viscosity 7.46 cPs. HCl accelerates protonation on the O atoms and the formation of positive C atoms of carbonyl groups of citric acid. The time of UV irradiation gives the longer energy for the bond formation between the positive C atoms of the carbonyl group and the O atoms of the hydroxyl group at C-6 atoms of mannose and galactose.
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Affiliation(s)
- Wuryanto Hadinugroho
- Department of Pharmaceutical, Faculty of Pharmacy, Widya Mandala Surabaya Catholic University, Kalisari Selatan no. 1 Pakuwon City, Surabaya, Indonesia.,Department of Pharmaceutical, Faculty of Pharmacy, Gadjah Mada University, Sekip Utara, Yogyakarta, Indonesia
| | - Suwaldi Martodihardjo
- Department of Pharmaceutical, Faculty of Pharmacy, Gadjah Mada University, Sekip Utara, Yogyakarta, Indonesia
| | - Achmad Fudholi
- Department of Pharmaceutical, Faculty of Pharmacy, Gadjah Mada University, Sekip Utara, Yogyakarta, Indonesia
| | - Sugeng Riyanto
- Department of Pharmaceutical, Faculty of Pharmacy, Gadjah Mada University, Sekip Utara, Yogyakarta, Indonesia
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10
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In vitro controlled release of tuberculosis drugs by amphiphilic branched copolymer nanoparticles. J IND ENG CHEM 2019. [DOI: 10.1016/j.jiec.2019.04.033] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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11
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Zhao Y, Moser C, Henriksson G. Transparent Composites Made from Tunicate Cellulose Membranes and Environmentally Friendly Polyester. CHEMSUSCHEM 2018; 11:1728-1735. [PMID: 29644799 DOI: 10.1002/cssc.201800627] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/26/2018] [Revised: 04/06/2018] [Indexed: 06/08/2023]
Abstract
A series of optically transparent composites were made by using tunicate cellulose membranes, in which the naturally organized cellulose microfibrillar network structure of tunicate tunics was preserved and used as the template and a solution of glycerol and citric acid at different molar ratios was used as the matrix. Polymerization through ester bond formation occurred at elevated temperatures without any catalyst, and water was released as the only byproduct. The obtained composites had a uniform and dense structure. Thus, the produced glycerol citrate polyester improved the transparency of the tunicate cellulose membrane while the cellulose membrane provided rigidity and strength to the prepared composite. The interaction between cellulose and polyester afforded the composites high thermal stability. Additionally, the composites were optically transparent and their shape, strength, and flexibility were adjustable by varying the formulation and reaction conditions. These composites of cellulose, glycerol, and citric acid are renewable and biocompatible and have many potential applications as structural materials in packaging, flexible displays, and solar cells.
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Affiliation(s)
- Yadong Zhao
- Fibre and Polymer Technology, KTH, Royal Institute of Technology, Teknikringen 56, 11428, Stockholm, Sweden
| | - Carl Moser
- Fibre and Polymer Technology, KTH, Royal Institute of Technology, Teknikringen 56, 11428, Stockholm, Sweden
| | - Gunnar Henriksson
- Fibre and Polymer Technology, KTH, Royal Institute of Technology, Teknikringen 56, 11428, Stockholm, Sweden
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12
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Sun L, Ma S, Wang C, Chi Y, Dong J. Supramolecular self-assembly of a polyelectrolyte chain based on step-growth polymerization of hydrophobic and hydrophilic monomers. RSC Adv 2017. [DOI: 10.1039/c7ra09205a] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
Polymerization of citric acid and hexamethylene diisocyanate and hydrolysis results in a polyelectrolyte PHMC. Noncovalent cross-linking of cooperative H-bonding units stabilizes the self-assembly of the PHMC chains into nanoparticles in water.
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Affiliation(s)
- Li Sun
- College of Chemistry and Chemical Engineering
- Shaoxing University
- Shaoxing
- China
- School of Materials Science and Chemical Engineering
| | - Shang Ma
- College of Chemistry and Chemical Engineering
- Shaoxing University
- Shaoxing
- China
| | - Chen Wang
- College of Chemistry and Chemical Engineering
- Shaoxing University
- Shaoxing
- China
| | - Yongmei Chi
- College of Chemistry and Chemical Engineering
- Shaoxing University
- Shaoxing
- China
- School of Materials Science and Chemical Engineering
| | - Jian Dong
- College of Chemistry and Chemical Engineering
- Shaoxing University
- Shaoxing
- China
- School of Materials Science and Chemical Engineering
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13
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de Jongh PAJM, Paul PKC, Khoshdel E, Wilson P, Kempe K, Haddleton DM. Thermal study of polyester networks based on renewable monomers citric acid and gluconolactone. POLYM INT 2016. [DOI: 10.1002/pi.5260] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Affiliation(s)
| | - Prem KC Paul
- Unilever Research; Port Sunlight Bebington CH63 3JW UK
| | - Ezat Khoshdel
- Unilever Research; Port Sunlight Bebington CH63 3JW UK
| | - Paul Wilson
- Department of Chemistry; University of Warwick; Coventry CV4 7AL UK
- Monash Institute of Pharmaceutical Sciences; Monash University; Parkville VIC 3052 Australia
| | - Kristian Kempe
- Department of Chemistry; University of Warwick; Coventry CV4 7AL UK
- Monash Institute of Pharmaceutical Sciences; Monash University; Parkville VIC 3052 Australia
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14
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Ickowicz DE, Haim-Zada M, Abbas R, Touitou D, Nyska A, Golovanevski L, Weiniger CF, Katzhendler J, Domb AJ. Castor oil-citric acid copolyester for tissue augmentation. POLYM ADVAN TECHNOL 2014. [DOI: 10.1002/pat.3345] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Diana E. Ickowicz
- Institute for Drug Research, School of Pharmacy, Faculty of Medicine; The Hebrew University of Jerusalem; Ein Kerem Jerusalem Israel
| | - Moran Haim-Zada
- Institute for Drug Research, School of Pharmacy, Faculty of Medicine; The Hebrew University of Jerusalem; Ein Kerem Jerusalem Israel
| | - Randa Abbas
- Juvenis Ltd; Misgav Business Park, M.P. Misgav 20174 Israel
| | - Dan Touitou
- Juvenis Ltd; Misgav Business Park, M.P. Misgav 20174 Israel
| | - Abraham Nyska
- Haharuv 18, PO Box 184 Timrat 23840 Israel
- Sackler School of Medicine; Tel Aviv University; Tel Aviv Israel
| | - Ludmila Golovanevski
- Department of Anesthesiology and Critical Care Medicine; Hadassah Hebrew University Medical Center; Jerusalem Israel
| | - Carolyn F. Weiniger
- Department of Anesthesia; Stanford University School of Medicine; Stanford CA USA
| | - Jeoshua Katzhendler
- Institute for Drug Research, School of Pharmacy, Faculty of Medicine; The Hebrew University of Jerusalem; Ein Kerem Jerusalem Israel
| | - Abraham J. Domb
- Institute for Drug Research, School of Pharmacy, Faculty of Medicine; The Hebrew University of Jerusalem; Ein Kerem Jerusalem Israel
- Jerusalem College of Engineering (JCE); Jerusalem Israel
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15
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Aboudzadeh A, Fernandez M, Muñoz ME, Santamaría A, Mecerreyes D. Ionic Supramolecular Networks Fully Based on Chemicals Coming from Renewable Sources. Macromol Rapid Commun 2013; 35:460-5. [DOI: 10.1002/marc.201300732] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2013] [Revised: 10/24/2013] [Indexed: 11/09/2022]
Affiliation(s)
- Ali Aboudzadeh
- POLYMAT, University of the Basque Country UPV/EHU; Joxe Mari Korta Center; Avda. Tolosa 72 20018 Donostia-San Sebastián Spain
| | - Mercedes Fernandez
- POLYMAT and Polymer Science and Technology Department; Faculty of Chemistry, University of the Basque Country UPV/EHU; Paseo Manuel de Lardizabal 3 20018 Donostia-San Sebastián Spain
| | - Maria Eugenia Muñoz
- POLYMAT and Polymer Science and Technology Department; Faculty of Chemistry, University of the Basque Country UPV/EHU; Paseo Manuel de Lardizabal 3 20018 Donostia-San Sebastián Spain
| | - Antxon Santamaría
- POLYMAT and Polymer Science and Technology Department; Faculty of Chemistry, University of the Basque Country UPV/EHU; Paseo Manuel de Lardizabal 3 20018 Donostia-San Sebastián Spain
| | - David Mecerreyes
- POLYMAT, University of the Basque Country UPV/EHU; Joxe Mari Korta Center; Avda. Tolosa 72 20018 Donostia-San Sebastián Spain
- Ikerbasque; Basque Foundation for Science; E-48011 Bilbao Spain
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16
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Jiang M, Chen G, Lu P, Dong J. Preparation of aqueous soluble polyamides from renewable succinic acid and citric acid as a new approach to design bio-inspired polymers. J Appl Polym Sci 2013. [DOI: 10.1002/app.39807] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Man Jiang
- Faculty of Materials Science and Chemical Engineering; Ningbo University; Ningbo Zhejiang Province 315211 China
- School of Chemistry and Chemical Engineering; Shaoxing University; Shaoxing Zhejiang Province 312000 China
- Zhejiang Provincial Key Laboratory of Alternative Technologies for Fine Chemicals; Shaoxing Zhejiang Province 312000 China
| | - Guangsong Chen
- School of Chemistry and Chemical Engineering; Shaoxing University; Shaoxing Zhejiang Province 312000 China
| | - Ping Lu
- School of Chemistry and Chemical Engineering; Shaoxing University; Shaoxing Zhejiang Province 312000 China
- Zhejiang Provincial Key Laboratory of Alternative Technologies for Fine Chemicals; Shaoxing Zhejiang Province 312000 China
| | - Jian Dong
- Faculty of Materials Science and Chemical Engineering; Ningbo University; Ningbo Zhejiang Province 315211 China
- School of Chemistry and Chemical Engineering; Shaoxing University; Shaoxing Zhejiang Province 312000 China
- Zhejiang Provincial Key Laboratory of Alternative Technologies for Fine Chemicals; Shaoxing Zhejiang Province 312000 China
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Aboudzadeh MA, Muñoz ME, Santamaría A, Fernández-Berridi MJ, Irusta L, Mecerreyes D. Synthesis and Rheological Behavior of Supramolecular Ionic Networks Based on Citric Acid and Aliphatic Diamines. Macromolecules 2012. [DOI: 10.1021/ma300966m] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- M. Ali Aboudzadeh
- POLYMAT, University of the Basque Country UPV/EHU, Joxe Mari Korta Center, Avda. Tolosa
72, 20018 Donostia-San Sebastian, Spain
| | - M. Eugenia Muñoz
- POLYMAT and Polymer Science and Technology Department,
Faculty of Chemistry, University of the Basque Country UPV-EHU, Paseo Manuel de Lardizabal 3, 20018 Donostia-San
Sebastián, Spain
| | - Antxon Santamaría
- POLYMAT and Polymer Science and Technology Department,
Faculty of Chemistry, University of the Basque Country UPV-EHU, Paseo Manuel de Lardizabal 3, 20018 Donostia-San
Sebastián, Spain
| | - M. José Fernández-Berridi
- POLYMAT and Polymer Science and Technology Department,
Faculty of Chemistry, University of the Basque Country UPV-EHU, Paseo Manuel de Lardizabal 3, 20018 Donostia-San
Sebastián, Spain
| | - Lourdes Irusta
- POLYMAT and Polymer Science and Technology Department,
Faculty of Chemistry, University of the Basque Country UPV-EHU, Paseo Manuel de Lardizabal 3, 20018 Donostia-San
Sebastián, Spain
| | - David Mecerreyes
- POLYMAT, University of the Basque Country UPV/EHU, Joxe Mari Korta Center, Avda. Tolosa
72, 20018 Donostia-San Sebastian, Spain
- Ikerbasque, Basque Foundation for Science, E-48011
Bilbao, Spain
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Doll KM, Vermillion KE, Fanta GF, Liu Z. Diffusion coefficients of water in biobased hydrogel polymer matrices by nuclear magnetic resonance imaging. J Appl Polym Sci 2012. [DOI: 10.1002/app.36798] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Bednarz S, Lukasiewicz M, Mazela W, Pajda M, Kasprzyk W. Chemical structure of poly(β-cyclodextrin-co-citric acid). J Appl Polym Sci 2010. [DOI: 10.1002/app.33002] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Xue CH, Zhou RJ, Shi MM, Gao Y, Wu G, Zhang XB, Chen HZ, Wang M. A green route to water soluble carbon nanotubes and in situ loading of silver nanoparticles. NANOTECHNOLOGY 2008; 19:325605. [PMID: 21828818 DOI: 10.1088/0957-4484/19/32/325605] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
A green approach has been developed to synthesize water soluble multi-walled carbon nanotubes (MWNTs). Ag nanoparticles have been loaded on the as-synthesized MWNTs via the in situ solution method. The strategy is based on the introduction of hydroxyl and carboxyl groups through a mild modification of MWNTs via polycondensation of citric acid and D-sorbitol, improving the water solubility of MWNTs, giving rise to preferred sites of Ag nucleation, and providing mild in situ reducing agents. The modification of MWNTs and loading of Ag nanoparticles on MWNTs were demonstrated by Fourier transform infrared spectroscopy, thermogravimetric analysis, transmission electron microscopy, and scanning electron microscopy.
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Affiliation(s)
- Chao-Hua Xue
- Department of Polymer Science and Engineering, State Key Lab of Silicon Materials, Zhejiang University, Hangzhou 310027, People's Republic of China. Key Laboratory of Macromolecule Synthesis and Functionalization, (Zhejiang University), Ministry of Education, Hangzhou 310027, People's Republic of China
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Noordover BAJ, Duchateau R, van Benthem RATM, Ming W, Koning CE. Enhancing the functionality of biobased polyester coating resins through modification with citric acid. Biomacromolecules 2007; 8:3860-70. [PMID: 17994697 DOI: 10.1021/bm700775e] [Citation(s) in RCA: 64] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Citric acid (CA) was evaluated as a functionality-enhancing monomer in biobased polyesters suitable for coating applications. Model reactions of CA with several primary and secondary alcohols and diols, including the 1,4:3,6-dianhydrohexitols, revealed that titanium(IV) n-butoxide catalyzed esterification reactions involving these compounds proceed at relatively low temperatures, often via anhydride intermediates. Interestingly, the facile anhydride formation from CA at temperatures around CA's melting temperature ( T m = 153 degrees C) proved to be crucial in modifying sterically hindered secondary hydroxyl end groups. OH-functional polyesters were reacted with CA in the melt between 150 and 165 degrees C, yielding slightly branched carboxylic acid functional materials with strongly enhanced functionality. The acid/epoxy curing reaction of the acid-functional polymers was simulated with a monofunctional glycidyl ether. Finally, the CA-modified polyesters were applied as coatings, using conventional cross-linking agents. The formulations showed rapid curing, resulting in chemically and mechanically stable coatings. These results demonstrate that citric acid can be applied in a new way, making use of its anhydride formation to functionalize OH-functional polyesters, which is an important new step toward fully biobased coating systems.
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Affiliation(s)
- Bart A J Noordover
- Laboratory of Polymer Chemistry, Eindhoven University of Technology, Den Dolech 2, 5600 MB Eindhoven, The Netherlands
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