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Matusiak J, Grządka E, Maciołek U, Le TA, Huynh TP, Franus W. The interactions between zeolite and two cellulose derivatives: A comprehensive analysis of liquid and solid phase properties. Carbohydr Polym 2024; 343:122456. [PMID: 39174093 DOI: 10.1016/j.carbpol.2024.122456] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2024] [Revised: 06/24/2024] [Accepted: 07/01/2024] [Indexed: 08/24/2024]
Abstract
This study investigates the impact of cellulose-derived polymers, anionic carboxymethylcellulose (CMC), and cationic cellulose (CC) on the colloidal and thermal stability of zeolite Na-X materials. By exploring polymer adsorption onto Na-X surfaces and characterising the resultant materials, using FT-IR, XPS, SEM, PSD, CHN, and zeta potential, the research unveils how CMC and CC modify zeolite properties. This investigation elucidates the potential roles of these polymers in colloidal systems with zeolites, revealing their promise for crafting organic-inorganic materials. Additional insight was also provided by careful examination of the thermal stability (TGA-DSC) of the obtained cellulose/zeolite materials. Furthermore, the study distinguishes the different adsorption mechanisms of CMC and CC, with CMC relying on some weak interactions (H-bonding and van der Waals forces), while CC interacts mainly via electrostatic forces. Both CMC and CC can act as stabilizing agents, with CMC being more efficient and using both electrosteric and depletion stabilizations. Importantly, the concentration of CC plays a role in bridging flocculation, highlighting the concentration-dependent nature of the stabilization mechanism.
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Affiliation(s)
- Jakub Matusiak
- Department of Construction Materials Engineering and Geoengineering, Faculty of Civil Engineering and Architecture, Lublin University of Technology, Nadbystrzycka 40, 20-618 Lublin, Poland.
| | - Elżbieta Grządka
- Institute of Chemical Sciences, Faculty of Chemistry, Maria Curie-Skłodowska University, M. Skłodowskiej Curie 3 Sq., Lublin 20-031, Poland
| | - Urszula Maciołek
- Institute of Chemical Sciences, Faculty of Chemistry, Maria Curie-Skłodowska University, M. Skłodowskiej Curie 3 Sq., Lublin 20-031, Poland
| | - Trung-Anh Le
- Department of Chemistry, Faculty of Science, University of Helsinki, A.I. Virtasen aukio 1, 00560 Helsinki, Finland
| | - Tan-Phat Huynh
- Laboratory of Molecular Sciences and Engineering, Åbo Akademi University, Henrikinkatu 2, 20500 Turku, Finland
| | - Wojciech Franus
- Department of Construction Materials Engineering and Geoengineering, Faculty of Civil Engineering and Architecture, Lublin University of Technology, Nadbystrzycka 40, 20-618 Lublin, Poland
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2
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Sun D, Zeng J, Yang D, Qiu X, Liu W. Full biomass-based multifunctional flocculant from lignin and cationic starch. Int J Biol Macromol 2023; 253:127287. [PMID: 37806418 DOI: 10.1016/j.ijbiomac.2023.127287] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2023] [Revised: 10/04/2023] [Accepted: 10/05/2023] [Indexed: 10/10/2023]
Abstract
Flocculation is a common process for wastewater treatment. However, the most commonly used organic synthetic flocculants such as polyacrylamide are petroleum-based. In this work, biomass lignin was grafted with cationic starch to synthesize low-cost, green and fully biomass-based multifunctional flocculants. The cationic polyacrylamide was replaced by cheap industrial cationic starch. Hyperbranched multifunctional lignin-grafted cationic starch flocculant (CS-L) was successfully prepared via ring-opening reaction with epichlorohydrin. The mass content of lignin in the grafted product was between 16.6 % and 70.1 %. With the dosage of CS-L between 4.0 and 7.5 mg/l, the turbidity removal rate for 500 mg/l kaolin suspension reached more than 97 %. When the dosage of CS-L was 24 mg/l, the removal rate of 50 mg/l Cu2+ reached 85.7 %. Importantly, when the mixed solution of kaolin particles and Cu2+ was treated, the synchronous removal rates of kaolin and Cu2+ reached 90 % and 72 % respectively in the range of 8.0-12.0 mg/l flocculant addition. The synthesized lignin-grafted cationic starch flocculant showed an excellent multifunctional flocculation function.
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Affiliation(s)
- Danting Sun
- State Key Laboratory of Pulp and Paper Engineering, Guangdong Provincial Key Lab of Green Chemical Product Technology, School of Chemistry and Chemical Engineering, South China University of Technology, Wushan Road 381, Guangzhou, Guangdong 510640, China
| | - Jia Zeng
- State Key Laboratory of Pulp and Paper Engineering, Guangdong Provincial Key Lab of Green Chemical Product Technology, School of Chemistry and Chemical Engineering, South China University of Technology, Wushan Road 381, Guangzhou, Guangdong 510640, China
| | - Dongjie Yang
- State Key Laboratory of Pulp and Paper Engineering, Guangdong Provincial Key Lab of Green Chemical Product Technology, School of Chemistry and Chemical Engineering, South China University of Technology, Wushan Road 381, Guangzhou, Guangdong 510640, China
| | - Xueqing Qiu
- School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, China
| | - Weifeng Liu
- State Key Laboratory of Pulp and Paper Engineering, Guangdong Provincial Key Lab of Green Chemical Product Technology, School of Chemistry and Chemical Engineering, South China University of Technology, Wushan Road 381, Guangzhou, Guangdong 510640, China.
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3
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Gao W, Mo A, Jiang J, Liang Y, Cao X, He D. Removal of microplastics from water by coagulation of cationic-modified starch: An environmentally friendly solution. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 904:166787. [PMID: 37666335 DOI: 10.1016/j.scitotenv.2023.166787] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/11/2023] [Revised: 08/18/2023] [Accepted: 09/01/2023] [Indexed: 09/06/2023]
Abstract
Microplastics (MPs) pose a potential risk to aquatic ecosystems, and there is a growing demand to alleviate the contamination of MPs. Here, we introduce cationic-modified starch (CS) as an eco-friendly bio-coagulant for removing MPs from water. CS with varying degrees of substitution was synthesized and characterized, and its performance in removing MPs was evaluated under different MP sizes, types, and aging, as well as various water conditions. The results indicated that CS efficiently removed MPs, achieving an average removal rate of 65.33 % for polystyrene particles, with higher removal rates for larger, high-density, and aged MPs. The efficiency of CS remained consistent across a wide range of water pH values, but was significantly reduced in the presence of kaolin clay or/and humic acid. The removal efficiency of CS for MPs was enhanced by the non-ionic surfactant, Tween 20, but inhibited by the anionic surfactant, cetyltrimethylammonium bromide. In addition, CS could concurrently remove both MPs and phenanthrene, as a typical water contaminant. Moreover, the applicability of CS was demonstrated in natural water samples from the Ecological Demonstration Zone of the Yangtze River Delta, China, with an average removal rate of 60.13 ± 3.15 %. Taken together, this study offers an environmentally friendly and cost-effective approach for the removal of MPs from water, demonstrating CS has significant application potential as a sustainable solution to mitigate microplastic pollution.
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Affiliation(s)
- Wei Gao
- School of Ecological and Environmental Sciences, Shanghai Engineering Research Center of Biotransformation of Organic Solid Waste, East China Normal University, Shanghai 200241, China
| | - Aoyun Mo
- School of Ecological and Environmental Sciences, Shanghai Engineering Research Center of Biotransformation of Organic Solid Waste, East China Normal University, Shanghai 200241, China
| | - Jie Jiang
- School of Ecological and Environmental Sciences, Shanghai Engineering Research Center of Biotransformation of Organic Solid Waste, East China Normal University, Shanghai 200241, China
| | - Yuqing Liang
- School of Ecological and Environmental Sciences, Shanghai Engineering Research Center of Biotransformation of Organic Solid Waste, East China Normal University, Shanghai 200241, China
| | - Xiaomu Cao
- School of Ecological and Environmental Sciences, Shanghai Engineering Research Center of Biotransformation of Organic Solid Waste, East China Normal University, Shanghai 200241, China
| | - Defu He
- School of Ecological and Environmental Sciences, Shanghai Engineering Research Center of Biotransformation of Organic Solid Waste, East China Normal University, Shanghai 200241, China; Shanghai Key Laboratory for Urban Ecological Processes and Eco-Restoration, East China Normal University, Shanghai 200241, China; Technology Innovation Center for Land Spatial Eco-restoration in Metropolitan Area, Ministry of Natural Resources of China, Shanghai, 200062, China.
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4
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Chen R, Song Y, Wang Z, Ji H, Du Z, Ma Q, Yang Y, Liu X, Li N, Sun Y. Developments in small-angle X-ray scattering (SAXS) for characterizing the structure of surfactant-macromolecule interactions and their complex. Int J Biol Macromol 2023; 251:126288. [PMID: 37582436 DOI: 10.1016/j.ijbiomac.2023.126288] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2023] [Revised: 08/08/2023] [Accepted: 08/09/2023] [Indexed: 08/17/2023]
Abstract
The surfactant-macromolecule interactions (SMI) are one of the most critical topics for scientific research and industrial application. Small-angle X-ray scattering (SAXS) is a powerful tool for comprehensively studying the structural and conformational features of macromolecules at a size ranging from Angstroms to hundreds of nanometers with a time-resolve in milliseconds scale. The SAXS integrative techniques have emerged for comprehensively analyzing the SMI and the structure of their complex in solution. Here, the various types of emerging interactions of surfactant with macromolecules, such as protein, lipid, nuclear acid, polysaccharide and virus, etc. have been systematically reviewed. Additionally, the principle of SAXS and theoretical models of SAXS for describing the structure of SMI as well as their complex has been summarized. Moreover, the recent developments in the applications of SAXS for charactering the structure of SMI have been also highlighted. Prospectively, the capacity to complement artificial intelligence (AI) in the structure prediction of biological macromolecules and the high-throughput bioinformatics sequencing data make SAXS integrative structural techniques expected to be the primary methodology for illuminating the self-assembling dynamics and nanoscale structure of SMI. As advances in the field continue, we look forward to proliferating uses of SAXS based upon its abilities to robustly produce mechanistic insights for biology and medicine.
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Affiliation(s)
- Ruixin Chen
- College of Vocational and Technical Education, Yunnan Normal University, Kunming, Yunnan, China
| | - Yang Song
- College of Vocational and Technical Education, Yunnan Normal University, Kunming, Yunnan, China
| | - Zhichun Wang
- College of Vocational and Technical Education, Yunnan Normal University, Kunming, Yunnan, China
| | - Hang Ji
- College of Vocational and Technical Education, Yunnan Normal University, Kunming, Yunnan, China
| | - Zhongyao Du
- College of Vocational and Technical Education, Yunnan Normal University, Kunming, Yunnan, China
| | - Qingwen Ma
- College of Vocational and Technical Education, Yunnan Normal University, Kunming, Yunnan, China
| | - Ying Yang
- College of Vocational and Technical Education, Yunnan Normal University, Kunming, Yunnan, China
| | - Xingxun Liu
- College of Food Science and Engineering, Nanjing University of Finance and Economics, Nanjing, Jiangsu, China
| | - Na Li
- National Facility for Protein Science in Shanghai, Shanghai Advanced Research Institute, CAS, Shanghai, China.
| | - Yang Sun
- College of Vocational and Technical Education, Yunnan Normal University, Kunming, Yunnan, China.
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Hao Z, Zhang W, Chen W, Mei P, Lai L. Relationship between the molecular structure of different dithiocarbamates and their oil removal performance. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2022; 86:467-481. [PMID: 35960831 DOI: 10.2166/wst.2022.221] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Six kinds of dithiocarbamates (DTCs) were synthesized from three linear amines with different amino numbers, two polyether amines with different molecular weights, and one branched amine with benzene rings, respectively. The conditions affecting oil removal rate and floc rising time of DTC were studied using simulated oily wastewater. Furthermore, the effects of the molecular structure of DTC on oil removal efficiency, floc morphology, floc rising time, and floc adhesion were investigated. When the conditions were optimal, the oil removal efficiency of DTC synthesized from polyethylene polyamine was 95.14%, which was higher than other DTCs. Meanwhile, the ferrous ion was the most suitable chelating metal ion for DTC than other transition metal ions. The increase of amino groups in the initiators improves the oil removal efficiency of DTC, while the linear structural DTC exhibits a low oil removal efficiency due to a lack of network structural flocs. The introduction of polyether structure helps reduce the volume of the flocs and make them compact, but it also increases the adhesion of the floc on the metal surface. The introduction of bisphenol A phenol amino resin structure induces the generation of the flocs in oil wastewater and improves the oil removal efficiency.
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Affiliation(s)
- Ziyang Hao
- College of Chemistry and Environmental Engineering, Yangtze University, Jingzhou 434023, P. R. China E-mail:
| | - Wenyan Zhang
- College of Chemistry and Environmental Engineering, Yangtze University, Jingzhou 434023, P. R. China E-mail:
| | - Wu Chen
- College of Chemistry and Environmental Engineering, Yangtze University, Jingzhou 434023, P. R. China E-mail:
| | - Ping Mei
- College of Chemistry and Environmental Engineering, Yangtze University, Jingzhou 434023, P. R. China E-mail:
| | - Lu Lai
- College of Chemistry and Environmental Engineering, Yangtze University, Jingzhou 434023, P. R. China E-mail:
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The influence of fucoidan on stability, adsorption and electrokinetic properties of ZnO and TiO2 suspensions. APPLIED NANOSCIENCE 2022. [DOI: 10.1007/s13204-021-01760-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
AbstractStabilization of nano-oxide suspensions is a very important process. Nowadays, synthetic polymers are used to increase stability of the colloidal systems. However, this solution is not ecological and incompatible with the principles of green chemistry. Instead of synthetic polymers, their natural counterparts can be used. Herein, we present the use of natural bioactive polysaccharide—fucoidan as a stabilizer of nano-zinc(II) and nano-titanium(IV) oxide suspensions. These two oxides are commercially available and are widely used in the cosmetic and pharmaceutical industries. The turbidimetric studies (Turbiscan Lab) showed that the addition of fucoidan leads to the increase of stability and that the effect depends on the polymer concentration. To fully describe the systems’ stability, the adsorption (UV–Vis and FT-IR/PAS) and the electrokinetic properties (zeta potential and surface charge density) were studied. The obtained results indicate that fucoidan adsorbs by the electrostatic and non-electrostatic interactions on the used oxides forming the tight adsorption layer. The following paper thoroughly explains the stabilization mechanism of fucoidan toward the nano-oxide suspensions. Moreover, the presented results could be useful in the preparation of new cosmetic and pharmaceutical products containing nano-oxides.
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Grządka E, Godek E, Słowik G, Kowalczuk A, Matusiak J, Maciołek U. Interactions between Nanoclay, CTAB and Linear/Star Shaped Polymers. Int J Mol Sci 2022; 23:ijms23063051. [PMID: 35328470 PMCID: PMC8955478 DOI: 10.3390/ijms23063051] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2022] [Revised: 03/03/2022] [Accepted: 03/09/2022] [Indexed: 11/16/2022] Open
Abstract
The influence of star-shaped (PAA-SS) and linear polyacrylic acid (PAA) with different molecular weights (high—PAA-HMW and low—PAA-LMW) on the structure of the adsorption layer, adsorption amount, electrokinetic and stabilizing properties of the PAA/CTAB/nanoclay suspensions was studied. The properties of the systems containing one of these polymers, the cationic surfactant—hexadecyltrimethylammonium bromide (CTAB) and the surface-modified nanoclay (N-SM) were analyzed using the following techniques: BET, CHN, FT-IR, ED-XRF, XRD, HRTEM, UV-Vis, tensiometry and zeta potential measurements. It was proved that PAA could be used as an effective stabilizer of N-SM. Moreover, the addition of CTAB caused a significant increase in the stability of the systems but decreased the adsorption of PAA on the N-SM surface and changed the structure of the adsorption layers. The largest stability was observed in the PAA-HMW/CTAB system. The PAA polymers and PAA/CTAB complexes adsorbed, especially on the clay surface, influenced the primary distribution of the layered sheets but kept the same basal d-spacing. The adsorption of PAA and the PAA/CTAB complexes took place mainly at the plate edges and on the contact space between the sheets. The obtained results will be used for the preparation of the PAA/CTAB/nanoclay composite for water purification.
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Affiliation(s)
- Elżbieta Grządka
- Department of Radiochemistry and Environmental Chemistry, Institute of Chemical Sciences, Faculty of Chemistry, Maria Curie-Skłodowska University, M. Skłodowskiej-Curie 3 Sq., 20-031 Lublin, Poland;
- Correspondence:
| | - Ewelina Godek
- Department of Radiochemistry and Environmental Chemistry, Institute of Chemical Sciences, Faculty of Chemistry, Maria Curie-Skłodowska University, M. Skłodowskiej-Curie 3 Sq., 20-031 Lublin, Poland;
| | - Grzegorz Słowik
- Department of Chemical Technology, Institute of Chemical Sciences, Faculty of Chemistry, Maria Curie-Skłodowska University, M. Skłodowskiej-Curie 3 Sq., 20-031 Lublin, Poland;
| | - Agnieszka Kowalczuk
- Centre of Polymer and Carbon Materials, Polish Academy of Sciences, M. Curie-Skłodowskiej 34, 41-819 Zabrze, Poland;
| | - Jakub Matusiak
- Faculty of Chemistry, Wroclaw University of Science and Technology, Wybrzeże Wyspiańskiego 27, 50-370 Wroclaw, Poland; or
| | - Urszula Maciołek
- Analytical Laboratory, Institute of Chemical Sciences, Faculty of Chemistry, Maria Curie-Skłodowska University, M. Skłodowskiej-Curie 3 Sq., 20-031 Lublin, Poland;
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Karić N, Vukčević M, Ristić M, Perić-Grujić A, Marinković A, Trivunac K. A green approach to starch modification by solvent-free method with betaine hydrochloride. Int J Biol Macromol 2021; 193:1962-1971. [PMID: 34762916 DOI: 10.1016/j.ijbiomac.2021.11.027] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2021] [Revised: 10/05/2021] [Accepted: 11/03/2021] [Indexed: 11/15/2022]
Abstract
In this study, a novel simple and eco-efficient, semi-dry method with a spray system for starch modification has been developed. Compared to conventional semi-dry methods, this method does not use solvents so that no slurry or semi-liquid mixture is obtained, the material is in a moisted/semi-moisted state. The modification of starch was performed using betaine hydrochloride (BHC) as the cationic reagent, and the characteristics of such starch derivates were compared with cationic starches obtained using glycidyltrimethylammonium chloride (GTMAC). Due to the instability, toxicity, and high cost of the most commonly used GTMAC, it should be replaced with more eco-friendly reagents, such as BHC, which is derived from betaine found in most green plants (e.g., spinach - Spinacia oleracea, beets - Beta vulgaris). The influence of processing conditions such as temperature, concentration of cationic reagents, presence and concentration of natural plasticizers/catalyst on physico-chemical and structural properties of cationic starches have also been studied. The cationic degree varied from 0.045-0.204 for the starch-BHC samples and within the range of 0.066-0.245 for the starch-GTMAC samples. The modification of starch with cationic reagents resulted in an increased solubility and swelling capacity, followed by decreased viscosity of the modified starches.
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Affiliation(s)
- Nataša Karić
- Innovation Center of Faculty of Technology and Metallurgy, Karnegijeva 4, 11060 Belgrade, Serbia.
| | - Marija Vukčević
- University of Belgrade, Faculty of Technology and Metallurgy, Karnegijeva 4, 11060 Belgrade, Serbia
| | - Mirjana Ristić
- University of Belgrade, Faculty of Technology and Metallurgy, Karnegijeva 4, 11060 Belgrade, Serbia
| | - Aleksandra Perić-Grujić
- University of Belgrade, Faculty of Technology and Metallurgy, Karnegijeva 4, 11060 Belgrade, Serbia
| | - Aleksandar Marinković
- University of Belgrade, Faculty of Technology and Metallurgy, Karnegijeva 4, 11060 Belgrade, Serbia
| | - Katarina Trivunac
- University of Belgrade, Faculty of Technology and Metallurgy, Karnegijeva 4, 11060 Belgrade, Serbia
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Biswas S, Pal A. Application of biopolymers as a new age sustainable material for surfactant adsorption: A brief review. CARBOHYDRATE POLYMER TECHNOLOGIES AND APPLICATIONS 2021. [DOI: 10.1016/j.carpta.2021.100145] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
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10
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Influence of Zwitterionic CAPB on Flocculation of the Aqueous Cationic Guar Gum/Glauconite Suspensions at Various pH. Int J Mol Sci 2021; 22:ijms222212157. [PMID: 34830038 PMCID: PMC8621159 DOI: 10.3390/ijms222212157] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2021] [Revised: 11/05/2021] [Accepted: 11/08/2021] [Indexed: 11/21/2022] Open
Abstract
The influence of the pseudoamphoteric zwitterionic surfactant cocamidopropylbetaine (CAPB) on the stabilizing flocculating properties of the aqueous suspensions of glauconite (GT) with cationic guar gum (CGG) at various pH values was investigated. The following techniques were used: turbidimetry, UV-VIS spectrophotometry, tensiometry, electrophoretic mobility measurements, SEM, CHN, XRD, and FT-IR. It was established that CGG is an effective glauconite flocculant. Moreover, the most probable mechanism that is responsible for flocculation is bridge flocculation resulting from polymer adsorption on the glauconite surface. The adsorption process is caused by electrostatic interactions between the negatively charged glauconite surface and the positively charged polymer. The amount of CGG adsorption increases with the increase of the pH, which was confirmed by the adsorption and zeta potential measurements. The addition of CAPB increases the amount of the polymer adsorption due to the formation of intermolecular polymer–surfactant complexes; however, it reduces flocculation effectiveness.
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Wei L, Jinju M, Hongjian P, Zongwu W, Xinding Y. Synthesis of a polyamine-modified starch flocculant and its application. IRANIAN POLYMER JOURNAL 2021. [DOI: 10.1007/s13726-021-00921-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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12
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A review on cationic starch and nanocellulose as paper coating components. Int J Biol Macromol 2020; 162:578-598. [DOI: 10.1016/j.ijbiomac.2020.06.131] [Citation(s) in RCA: 37] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2020] [Revised: 06/06/2020] [Accepted: 06/14/2020] [Indexed: 01/11/2023]
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13
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Matusiak J, Grządka E, Kowalczuk A, Pietruszka R, Godlewski M. The influence of hydrocarbon, fluorinated and silicone surfactants on the adsorption, stability and electrokinetic properties of the κ-carrageenan/alumina system. J Mol Liq 2020. [DOI: 10.1016/j.molliq.2020.113669] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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14
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Abdullahi W, Crossman M, Griffiths PC. Surfactant-Modulation of the Cationic-Polymer-Induced Aggregation of Anionic Particulate Dispersions. Polymers (Basel) 2020; 12:polym12020287. [PMID: 32024169 PMCID: PMC7077465 DOI: 10.3390/polym12020287] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2019] [Accepted: 01/08/2020] [Indexed: 11/16/2022] Open
Abstract
Commodity formulations contain many chemically distinct components and their mutual interactions define the beneficial characteristics of the formulation. Mixing oppositely charged polymers and surfactants invariably induces macroscopic phase separation, to a degree dependent on the prevailing polymer and surface charge densities, and the interaction can be modulated by added ionic surfactants. Here, it is shown that a general universality exists between the charge present on a series of cationic-modified cellulose polymers—the charge being controlled either by the degree of cationic modification of the polymer itself or through the subsequent level of anionic surfactant binding—and its capacity to remove anionic colloidal material from solution, be that silica particles or polystyrene-butadiene lattices. Particulate material not removed from solution bears no adsorbed polymer, i.e., the particle surface is bare. Addition of nonionic surfactant does not negate this universality, implying that the nonionic surfactant is largely a spectator molecule or structure (micelle) in these systems, and that the dominant force is an electrostatic one.
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Affiliation(s)
- Wasiu Abdullahi
- School of Science, Faculty of Engineering and Science, University of Greenwich, Chatham Maritime, Kent ME4 4TB, UK;
| | - Martin Crossman
- Unilever Research, Port Sunlight, Quarry Road East, Bebington, Wirral CH63 3JW, UK;
| | - Peter Charles Griffiths
- School of Science, Faculty of Engineering and Science, University of Greenwich, Chatham Maritime, Kent ME4 4TB, UK;
- Correspondence: ; Tel.: +44-208-331-9549
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