1
|
Bai N, Shi Y, Wang YX, Liu LZ, Song LX, Wang CC, Song LF. Effects of nano-silica on the crystallization, structure, and mechanical properties of crosslinked ethylene-octene copolymer/nano-silica composites. JOURNAL OF POLYMER ENGINEERING 2023. [DOI: 10.1515/polyeng-2022-0199] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/30/2023]
Abstract
Abstract
Nano-silica (SiO2) has been widely used to fill rubbers (crosslinked) and usual polyolefin elastomers (POEs). SiO2 filled POE with crystalline structure can also be crosslinked. Crystallization, structure, and mechanical properties of crosslinked POE/SiO2 composites can be affected by SiO2. In this paper, crosslinked POE/SiO2 composites were obtained through two different methods: dynamic crosslinking in molten state and static crosslinking. For the non-crosslinked and static crosslinked composites, SiO2 had a more significant effect on the nucleation in non-crosslinked POE than in static crosslinked POE. For the dynamic crosslinked composite, SiO2 and crosslinking points hindered the mobility of POE chains and suppressed the POE crystallization, resulting in smaller and fewer crystals. Dynamic mechanical analysis showed that the SiO2 and POE were compatible, as evidenced by the lower tan(δ) value in SiO2-filled samples. The latter was more consistent with the higher tensile strength and elongation at break for the non-crosslinked and static crosslinked composites than for the non-filled samples. However, the dynamic crosslinked composite exhibited the worst elongation at break, resulting from the lowest number of crystals and shortened molecular chains due to the shearing that occurred during crosslinking process. The SiO2 had no observable effect on the permanent deformation of samples.
Collapse
|
2
|
Layered Double Hydroxide Materials: A Review on Their Preparation, Characterization, and Applications. INORGANICS 2023. [DOI: 10.3390/inorganics11030121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/17/2023] Open
Abstract
Layered double hydroxides (LDHs), a type of synthetic clay with assorted potential applications, are deliberated upon in view of their specific properties, such as adsorbent-specific behavior, biocompatibility, fire-retardant capacity, and catalytic and anion exchange properties, among others. LDHs are materials with two-dimensional morphology, high porosity, and exceptionally tunable and exchangeable anionic particles with sensible interlayer spaces. The remarkable feature of LDHs is their flexibility in maintaining the interlayer spaces endowing them with the capacity to accommodate a variety of ionic species, suitable for many applications. Herein, some synthetic methodologies, general characterizations, and applications of LDHs are summarized, encompassing their broader appliances as a remarkable material to serve society and address several problems viz. removal of pollutants and fabrication of sensors and materials with multifaceted useful applications in the medical, electrochemical, catalytic, and agricultural fields, among others.
Collapse
|
3
|
Xu Q, Sun Z, Tian R, Li K, Lu C. Fluorescence quantification of inorganic particle dispersity for anti-aging evaluation of polymer composites. Chem Commun (Camb) 2023; 59:2652-2655. [PMID: 36779915 DOI: 10.1039/d2cc06036a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/09/2023]
Abstract
We have developed a fluorescent quantification strategy to evaluate the uniformity and the aggregation degree of inorganic particles in polymers. This proposed strategy has been successfully used for investigating the anti-aging behaviors of composites.
Collapse
Affiliation(s)
- Qinghong Xu
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing, 10029, China.
| | - Ziqi Sun
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing, 10029, China.
| | - Rui Tian
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing, 10029, China.
| | - Kaitao Li
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing, 10029, China.
| | - Chao Lu
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing, 10029, China. .,Green Catalysis Center, College of Chemistry, Zhengzhou University, Zhengzhou, 450001, China
| |
Collapse
|
4
|
Haque ME, Khan MW, Hasan MM, Chowdhury MNK. Synthesis, characterization and performance of nanocopper impregnated sawdust-reinforced nanocomposite. Polym Bull (Berl) 2022. [DOI: 10.1007/s00289-022-04496-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
|
5
|
Pradhan S, Goswami D, Ratna D, Chattopadhyay S. Graphene nanoplatelet filled elastomer composites; influence of different matrices on the dispersion, electrical and mechanical properties. POLYM ENG SCI 2022. [DOI: 10.1002/pen.26154] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Sudip Pradhan
- Rubber Technology Cell Naval Dockyard Mumbai India
- Rubber Technology Centre Indian Institute of Technology Kharagpur Kharagpur India
| | - Debottam Goswami
- School of Nano‐science and Technology Indian Institute of Technology Kharagpur Kharagpur India
| | | | - Santanu Chattopadhyay
- Rubber Technology Centre Indian Institute of Technology Kharagpur Kharagpur India
- School of Nano‐science and Technology Indian Institute of Technology Kharagpur Kharagpur India
| |
Collapse
|
6
|
Chen Q, Huang W, Duan P, Yue T, Zhang L, Wu X, Liu J. Manipulating the mechanical properties of cis-polyisoprene nanocomposites via molecular dynamics simulation. POLYMER 2022. [DOI: 10.1016/j.polymer.2022.125233] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/15/2022]
|
7
|
Viscusi G, D'Amico F, Gorrasi G. In situ one‐step fabrication of layered double hydroxide deposited on cellulose: Effect of modified cellulose on physical properties of polyurethane composites. POLYM ADVAN TECHNOL 2022. [DOI: 10.1002/pat.5684] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Gianluca Viscusi
- Department of Industrial Engineering University of Salerno Fisciano Italy
| | - Francesca D'Amico
- Department of Industrial Engineering University of Salerno Fisciano Italy
| | - Giuliana Gorrasi
- Department of Industrial Engineering University of Salerno Fisciano Italy
| |
Collapse
|
8
|
Mukherjee M, Mandal S, Gnanasundaram S, Das BN. Polyurethane‐layered double hydroxide nanocomposite foam: in‐situ synthesis by reaction injection molding and characterization. POLYM INT 2022. [DOI: 10.1002/pi.6365] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Moumita Mukherjee
- Shoe & Product Design Centre (SPDC), CSIR – Central Leather Research Institute Chennai 600020 India
| | - Sujata Mandal
- Centre for Analysis, Testing, Evaluation& Reporting Services (CATERS), CSIR – Central Leather Research Institute Chennai 600020 India
| | - Saraswathy Gnanasundaram
- Shoe & Product Design Centre (SPDC), CSIR – Central Leather Research Institute Chennai 600020 India
| | - Bhabendra Nath Das
- Shoe & Product Design Centre (SPDC), CSIR – Central Leather Research Institute Chennai 600020 India
| |
Collapse
|
9
|
Shabani S, Dinari M. Ag/LDH-itaconic acid-gellan gam nanocomposites: Facile and green synthesis, characterization, and excellent catalytic reduction of 4-nitrophenol. Int J Biol Macromol 2021; 193:1645-1652. [PMID: 34742553 DOI: 10.1016/j.ijbiomac.2021.11.001] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2021] [Revised: 10/13/2021] [Accepted: 11/01/2021] [Indexed: 11/29/2022]
Abstract
The catalytic reduction reaction is one of the most commonly used solutions to convert high-risk contaminants into safe or low-risk materials. Today, with the increasing water pollution, the urgent need for efficient and effective catalysts is felt more than ever. For this purpose, for the first time, a green catalyst composed of silver nanoparticles anchored on itaconic acid-modified Ca-Al layered double hydroxide/gellan gum nanocomposite (Ag/LDH-ITA-GG NC) was prepared from a green approach without the use of any toxic organic solvents. To gain an in-depth insight into the physicochemical properties of the catalyst, different techniques including nitrogen adsorption-desorption isotherms, FESEM/mapping, FTIR, TGA, and XRD were used. The catalytic performance of the Ag/LDH-ITA-GG NC toward 4-nitrophenol reduction by NaBH4 was investigated. The calculated values of the apparent rate constant for this reaction are 0.2142 min-1 (for 1.0 mg of the catalyst), 0.2375 min-1 (for 3.0 mg of the catalyst), and 0.2550 min-1 (for 5.0 mg of the catalyst), indicating that the catalytic conversion of 4-nitrophenol to 4-aminophenol on the Ag/LDH-ITA-GG NC catalyst follows the pseudo-first-order kinetics and is comparable to the previous findings in the literature. The results of this study indicated that Ag/LDH-ITA-GG NC can potentially be utilized as an auspicious high efficient green catalyst for the reduction of pollutants like 4-nitrophenol.
Collapse
Affiliation(s)
- Shirin Shabani
- Chemistry Group, Pardis College, Isfahan University of Technology, Isfahan 84156-83111, Iran
| | - Mohammad Dinari
- Department of Chemistry, Isfahan University of Technology, Isfahan 84156-83111, Iran.
| |
Collapse
|
10
|
van Tonder L, Labuschagné FJWJ. Systematic Literature Review of the Effect of Layered Double Hydroxides on the Mechanical Properties of Rubber. Polymers (Basel) 2021; 13:polym13213716. [PMID: 34771273 PMCID: PMC8587788 DOI: 10.3390/polym13213716] [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: 09/14/2021] [Revised: 10/14/2021] [Accepted: 10/18/2021] [Indexed: 11/29/2022] Open
Abstract
Layered double hydroxides (LDHs) have attracted interest as reinforcing fillers in elastomers due to their ease of synthesis and customisability. A systematic review was performed on the effect of LDHs on the mechanical properties of elastomers using the Scopus database. Of the 61 articles relevant to the search criteria, the majority were published on polyurethane (PU) and nitrile butadiene rubber (NBR). Mg-Al LDH was used in most of the studies and Zn-Al LDH was used second most common. LDH can act as a reinforcing filler, typically increasing tensile strength even at low concentrations, so it could be used as an alternative to traditional reinforcing fillers for elastomers. LDH can also be made a functional filler by selecting the right metals and interlayer anions. It was found that Mg-Al LDH and Zn-Al LDH can both participate in crosslinking reactions and can replace MgO and ZnO, respectively. Less Zn ions are required for crosslinking when LDH is used than when ZnO is used, making LDH more environmentally friendly. Organic modification is usually required to improve compatibility with the elastomer matrix, especially in non-polar elastomers. It enables exfoliation of the LDH and intercalation of polymer chains into the LDH interlayer to occur. Organic modifiers can also be used to functionalise the LDH. Stearic acid used in crosslinking systems can be replaced by stearate anions from stearate-modified LDH.
Collapse
|
11
|
Curing kinetics and ionic interactions in layered double hydroxides–nitrile rubber Mg–Al-LDHs–XNBR composites. Polym Bull (Berl) 2021. [DOI: 10.1007/s00289-020-03249-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
AbstractThe carboxylated butadiene–acrylonitrile XNBR composites containing layered double hydroxides (Mg–Al-LDHs) were prepared with the aim to investigate the effect of various Mg:Al ratio in the filler composition on the rheological behavior, kinetic of curing and viscoelastic properties of final material. Due to the presence of metal cations, LDHs can form ionic cross-links with carboxylic functional groups of XNBR nitrile rubber. The DSC analysis indicated lower ranges of curing temperatures as the Mg:Al ratio raised (90–184 °C for Pural MG63, 88–187 °C for Pural MG70). The apparent energy of activation Ea decreased with increasing Mg:Al ratio reaching the value of 111.46 kJˑmole−1 for XNBR composite containing Pural MG70. The rheological analysis revealed the presence of specific polymer–nanofillers and fillers–fillers interactions. The XNBR–LDHs rubbers exhibited two transitions corresponding to the glass temperature of elastomer Tg (in range of −13.08 to −13.60 °C) and the ionic transition temperature Tα′ (in range of 32.95–37.90 °C). The ionic transition temperature Tα′ was not observed for the nitrile rubber composite containing Pural MG5 with the lowest Mg:Al ratio. The formed ordered ionic phase significantly affected the viscoelastic behavior of XNBR composites at room and sub-zero temperatures leading to the increase in the storage modulus G′. Therefore, among the various possible applications of LDHs, their use in rubber technology offers the potential for production of environmentally friendly rubber products cured without any additional curatives.
Collapse
|
12
|
Maciejewska M, Sowińska A. Influence of Fillers and Ionic Liquids on the Crosslinking and Performance of Natural Rubber Biocomposites. Polymers (Basel) 2021; 13:polym13101656. [PMID: 34069680 PMCID: PMC8160702 DOI: 10.3390/polym13101656] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2021] [Revised: 05/14/2021] [Accepted: 05/17/2021] [Indexed: 12/15/2022] Open
Abstract
This work concerns the effect of fillers and ionic liquids on the cure characteristics of natural rubber (NR) compounds, as well as the mechanical and thermal properties of the vulcanizates. Three types of white filler were applied, such as cellulose, nanosized silica and hydrotalcite, to modify the performance of NR composites. Additionally, ionic liquids (ILs) with bromide anion and different cations, i.e., 1-butyl-3-methylimidazolium (Bmi) and 1-butyl-3-methylpyrrolidinium (Bmpyr), were used to improve the cure characteristics of NR compounds and functional properties of the vulcanizates. The type of filler and the structure of ILs were proved to affect the rheometric properties and cure characteristics of NR compounds as well as the performance of the NR vulcanizates. Owing to the adsorption of curatives onto the surface, silica reduced the activity of the crosslinking system, prolonging the optimal vulcanization time of NR compounds and reducing the crosslinking degree of the elastomer. However, silica-filled NR exhibited the highest thermal stability. Hydrotalcite increased the crosslink density and, consequently, the mechanical properties of the vulcanizates, but deteriorated their thermal stability. ILs beneficially influenced the cure characteristics of NR compounds, as well as the crosslink density and mechanical performance of the vulcanizates, particularly those filled with silica. Cellulose did not significantly affect the vulcanization of NR compounds and crosslink density of the vulcanizates compared to the unfilled elastomer, but deteriorated their tensile strength. On the other hand, cellulose improved the thermal stability and did not considerably alter the damping properties of the vulcanizates.
Collapse
|
13
|
Coarse-Grained Lattice Modeling and Monte Carlo Simulations of Stress Relaxation in Strain-Induced Crystallization of Rubbers. Polymers (Basel) 2020; 12:polym12061267. [PMID: 32492948 PMCID: PMC7361699 DOI: 10.3390/polym12061267] [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: 05/07/2020] [Revised: 05/26/2020] [Accepted: 05/27/2020] [Indexed: 11/17/2022] Open
Abstract
Two-dimensional triangulated surface models for membranes and their three-dimensional (3D) extensions are proposed and studied to understand the strain-induced crystallization (SIC) of rubbers. It is well known that SIC is an origin of stress relaxation, which appears as a plateau in the intermediate strain region of stress-strain curves. However, this SIC is very hard to implement in models because SIC is directly connected to a solid state, which is mechanically very different from the amorphous state. In this paper, we show that the crystalline state can be quite simply implemented in the Gaussian elastic bond model, which is a straightforward extension of the Gaussian chain model for polymers, by replacing bonds with rigid bodies or eliminating bonds. We find that the results of Monte Carlo simulations for stress-strain curves are in good agreement with the reported experimental data of large strains of up to 1200%. This approach allows us to intuitively understand the stress relaxation caused by SIC.
Collapse
|
14
|
Monte Carlo Study of Rubber Elasticity on the Basis of Finsler Geometry Modeling. Symmetry (Basel) 2019. [DOI: 10.3390/sym11091124] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Configurations of the polymer state in rubbers, such as so-called isotropic (random) and anisotropic (almost aligned) states, are symmetric/asymmetric under space rotations. In this paper, we present numerical data obtained by Monte Carlo simulations of a model for rubber formulations to compare these predictions with the reported experimental stress–strain curves. The model is defined by extending the two-dimensional surface model of Helfrich–Polyakov based on the Finsler geometry description. In the Finsler geometry model, the directional degree of freedom σ → of the polymers and the polymer position r are assumed to be the dynamical variables, and these two variables play an important role in the modeling of rubber elasticity. We find that the simulated stresses τ sim are in good agreement with the reported experimental stresses τ exp for large strains of up to 1200 % . It should be emphasized that the stress–strain curves are directly calculated from the Finsler geometry model Hamiltonian and its partition function, and this technique is in sharp contrast to the standard technique in which affine deformation is assumed. It is also shown that the obtained results are qualitatively consistent with the experimental data as influenced by strain-induced crystallization and the presence of fillers, though the real strain-induced crystallization is a time-dependent phenomenon in general.
Collapse
|
15
|
Hajibeygi M, Shafiei-Navid S, Shabanian M. Influence of imide functionalized organo-modified Mg-Al layered double hydroxide on the thermal and mechanical properties of new aliphatic-aromatic poly (amide-imide). Appl Organomet Chem 2018. [DOI: 10.1002/aoc.4706] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Mohsen Hajibeygi
- Faculty of Chemistry; Kharazmi University; 15719-14911 Tehran Iran
| | | | - Meisam Shabanian
- Faculty of Chemistry and Petrochemical Engineering; Standard Research Institute (SRI); P.O. Box 31745-139 Karaj Iran
| |
Collapse
|
16
|
Qiu L, Gao Y, Zhang C, Yan Q, O'Hare D, Wang Q. Synthesis of highly efficient flame retardant polypropylene nanocomposites with surfactant intercalated layered double hydroxides. Dalton Trans 2018; 47:2965-2975. [DOI: 10.1039/c7dt03477f] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The thermal and flame retardant performances of polypropylene (PP) nanocomposites with sodium dodecyl sulfate (DDS) and stearic acid intercalated layered double hydroxides (DDS-LDHs and stearic-LDHs) were investigated in this study.
Collapse
Affiliation(s)
- Lei Qiu
- College of Environmental Science and Engineering
- Beijing Forestry University
- Beijing 100083
- P. R. China
- Beijing Key Lab for Source Control Technology of Water Pollution
| | - Yanshan Gao
- College of Environmental Science and Engineering
- Beijing Forestry University
- Beijing 100083
- P. R. China
- Beijing Key Lab for Source Control Technology of Water Pollution
| | - Cheng Zhang
- College of Environmental Science and Engineering
- Beijing Forestry University
- Beijing 100083
- P. R. China
- Beijing Key Lab for Source Control Technology of Water Pollution
| | - Qinghua Yan
- College of Environmental Science and Engineering
- Beijing Forestry University
- Beijing 100083
- P. R. China
- Beijing Key Lab for Source Control Technology of Water Pollution
| | - Dermot O'Hare
- Chemistry Research Laboratory
- Department of Chemistry
- University of Oxford
- Oxford
- UK
| | - Qiang Wang
- College of Environmental Science and Engineering
- Beijing Forestry University
- Beijing 100083
- P. R. China
- Beijing Key Lab for Source Control Technology of Water Pollution
| |
Collapse
|
17
|
He C, Zhang L, Chen D, Fan X, Cai Z, Zhu M. Modification of Talc@TiO2 toward high-performance nitrile rubber application. RSC Adv 2018; 8:17300-17311. [PMID: 35539239 PMCID: PMC9080459 DOI: 10.1039/c8ra01091a] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2018] [Accepted: 04/24/2018] [Indexed: 12/14/2022] Open
Abstract
To improve the dispersion of talcum powder (Talc) for polymer applications, modified nano-titania powders (TiO2) using a silane coupling agent (KH550), a titanate coupling agent (NDZ201) and sodium polyacrylate (PAAS) were well adhered to the surface of Talc with a ball milling method, thereby preparing a series of mixed Talc@TiO2 particles to realize good dispersion in carboxylated acrylonitrile–butadiene rubber (XNBR). Note that Talc@TiO2 particles modified by PAAS and NDZ201 show better colloidal dispersion in anhydrous ethanol due to organification and repulsion of charge, with original Talc and NDZ201 modified Talc@TiO2 powders as a comparison. Modified Talc@TiO2 hybrid XNBR shows good performance characteristics, including damping capacity and impact resistance, depending mainly on the excellent mechanical property of Talc, good dispersion and the high adhesive force between modified Talc@TiO2 and XNBR. Modified nano-titania powders (TiO2) with KH550, NDZ201 and PAAS were adhered to the surface of talcum powder (Talc) using a ball milling method.![]()
Collapse
Affiliation(s)
- Chao He
- Key Laboratory of Advanced Technologies of Materials (Ministry of Education)
- School of Materials Science and Engineering
- Southwest Jiaotong University
- Chengdu 610031
- China
| | - Lin Zhang
- Key Laboratory of Advanced Technologies of Materials (Ministry of Education)
- School of Materials Science and Engineering
- Southwest Jiaotong University
- Chengdu 610031
- China
| | - Duoli Chen
- Key Laboratory of Advanced Technologies of Materials (Ministry of Education)
- School of Materials Science and Engineering
- Southwest Jiaotong University
- Chengdu 610031
- China
| | - Xiaoqiang Fan
- Key Laboratory of Advanced Technologies of Materials (Ministry of Education)
- School of Materials Science and Engineering
- Southwest Jiaotong University
- Chengdu 610031
- China
| | - Zhenbing Cai
- Tribology Research Institute
- State Key Laboratory of Traction Power
- Southwest Jiaotong University
- Chengdu 610031
- China
| | - Minhao Zhu
- Key Laboratory of Advanced Technologies of Materials (Ministry of Education)
- School of Materials Science and Engineering
- Southwest Jiaotong University
- Chengdu 610031
- China
| |
Collapse
|
18
|
Silva VMD, Nunes RCR, Sousa AMFD. Epoxidized natural rubber and hydrotalcite compounds: rheological and thermal characterization. POLIMEROS 2017. [DOI: 10.1590/0104-1428.03416] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- Vanessa Macedo da Silva
- Universidade Federal do Rio de Janeiro, Brazil; Centro Universitário Estadual da Zona Oeste, Brazil
| | | | | |
Collapse
|
19
|
Natarajan T, Stöckelhuber KW, Malanin M, Eichhorn KJ, Formanek P, Reuter U, Wießner S, Heinrich G, Das A. Temperature-Dependent Reinforcement of Hydrophilic Rubber Using Ice Crystals. ACS OMEGA 2017; 2:363-371. [PMID: 31457443 PMCID: PMC6641033 DOI: 10.1021/acsomega.6b00443] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/30/2016] [Accepted: 01/18/2017] [Indexed: 06/07/2023]
Abstract
This is the first study on the impact of ice crystals on glass transition and mechanical behavior of soft cross-linked elastomers. A hydrophilic elastomer such as epichlorohydrin-ethylene oxide-allyl glycidyl ether can absorb about ∼40 wt % of water. The water-swollen cross-linked network exhibits elastic properties with more than 1500% stretchability at room temperature. Coincidently, the phase transition of water into solid ice crystals inside of the composites allows the reinforcement of the soft elastomer mechanically at lower temperatures. Young's modulus of the composites measured at -20 °C remarkably increased from 1.45 to 3.14 MPa, whereas at +20 °C, the effect was opposite and the Young's modulus decreased from 0.6 to 0.03 MPa after 20 days of water treatment. It was found that a part of the absorbed water, ∼74% of the total absorbed water, is freezable and occupies nearly 26 vol % of the composites. Simultaneously, these solid ice crystals are found to be acting as a reinforcing filler at lower temperatures. The size of these ice crystals is distributed in a relatively narrow range of 400-600 nm. The storage modulus (E') of the ice crystal-filled composites increased from 3 to 13 MPa at -20 °C. The glass transition temperature (-37 °C) of the soft cross-linked elastomer was not altered by the absorption of water. However, a special transition (melting of ice) occurred at temperatures close to 0 °C as observed in the dynamic mechanical analysis of the water-swollen elastomers. The direct polymer/filler (ice crystals) interaction was demonstrated by strain sweep experiments and investigated using Fourier transform infrared spectroscopy. This type of cross-linked rubber could be integrated into a smart rubber application such as in adaptable mechanics, where the stiffness of the rubber can be altered as a function of temperature without affecting the mechanical stretchability either below or above 0 °C (above the glass temperature region) of the rubber.
Collapse
Affiliation(s)
- Tamil
Selvan Natarajan
- Leibniz-Institut
für Polymerforschung Dresden e. V., Hohe Straße 6, D-01069 Dresden, Germany
- Technische
Universität Dresden, Institut für
Werkstoffwissenschaft, D-01062 Dresden, Germany
| | | | - Mikhail Malanin
- Leibniz-Institut
für Polymerforschung Dresden e. V., Hohe Straße 6, D-01069 Dresden, Germany
| | - Klaus-Jochen Eichhorn
- Leibniz-Institut
für Polymerforschung Dresden e. V., Hohe Straße 6, D-01069 Dresden, Germany
| | - Petr Formanek
- Leibniz-Institut
für Polymerforschung Dresden e. V., Hohe Straße 6, D-01069 Dresden, Germany
| | - Uta Reuter
- Leibniz-Institut
für Polymerforschung Dresden e. V., Hohe Straße 6, D-01069 Dresden, Germany
| | - Sven Wießner
- Leibniz-Institut
für Polymerforschung Dresden e. V., Hohe Straße 6, D-01069 Dresden, Germany
- Technische
Universität Dresden, Institut für
Werkstoffwissenschaft, D-01062 Dresden, Germany
| | - Gert Heinrich
- Leibniz-Institut
für Polymerforschung Dresden e. V., Hohe Straße 6, D-01069 Dresden, Germany
- Technische
Universität Dresden, Institut für
Werkstoffwissenschaft, D-01062 Dresden, Germany
| | - Amit Das
- Leibniz-Institut
für Polymerforschung Dresden e. V., Hohe Straße 6, D-01069 Dresden, Germany
- Technical
University of Tampere, Korkeakoulunkatu 16, Fi-33720 Tampere, Finland
| |
Collapse
|
20
|
Matchawet S, Kaesaman A, Vennemann N, Kumerlӧwe C, Nakason C. Effects of imidazolium ionic liquid on cure characteristics, electrical conductivity and other related properties of epoxidized natural rubber vulcanizates. Eur Polym J 2017. [DOI: 10.1016/j.eurpolymj.2016.12.037] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
21
|
Hou G, Tao W, Liu J, Gao Y, Zhang L, Li Y. Tailoring the dispersion of nanoparticles and the mechanical behavior of polymer nanocomposites by designing the chain architecture. Phys Chem Chem Phys 2017; 19:32024-32037. [DOI: 10.1039/c7cp06199d] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
The dispersion of nanoparticles with different polymer–nanoparticle interaction strengths and chain architectures.
Collapse
Affiliation(s)
- Guanyi Hou
- Key Laboratory of Beijing City on Preparation and Processing of Novel Polymer Materials
- Beijing University of Chemical Technology
- People's Republic of China
| | - Wei Tao
- Key Laboratory of Beijing City on Preparation and Processing of Novel Polymer Materials
- Beijing University of Chemical Technology
- People's Republic of China
| | - Jun Liu
- Key Laboratory of Beijing City on Preparation and Processing of Novel Polymer Materials
- Beijing University of Chemical Technology
- People's Republic of China
- Engineering Research Center of Elastomer Materials on Energy Conservation and Resources of Ministry of Education
- Beijing University of Chemical Technology
| | - Yangyang Gao
- Key Laboratory of Beijing City on Preparation and Processing of Novel Polymer Materials
- Beijing University of Chemical Technology
- People's Republic of China
- Engineering Research Center of Elastomer Materials on Energy Conservation and Resources of Ministry of Education
- Beijing University of Chemical Technology
| | - Liqun Zhang
- Key Laboratory of Beijing City on Preparation and Processing of Novel Polymer Materials
- Beijing University of Chemical Technology
- People's Republic of China
- Engineering Research Center of Elastomer Materials on Energy Conservation and Resources of Ministry of Education
- Beijing University of Chemical Technology
| | - Ying Li
- Department of Mechanical Engineering and Institute of Materials Science
- University of Connecticut
- Storrs
- USA
| |
Collapse
|
22
|
He X, Li T, Shi Z, Wang X, Xue F, Wu Z, Chen Q. Thermal-oxidative aging behavior of nitrile-butadiene rubber/functional LDHs composites. Polym Degrad Stab 2016. [DOI: 10.1016/j.polymdegradstab.2016.08.018] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|
23
|
Shoushtari Zadeh Naseri A, Jalali-Arani A. Study on the morphology, static and dynamic mechanical properties of (styrene butadiene rubber/ethylene propylene diene monomer/organoclay) nanocomposites vulcanized by the gamma radiation. J Appl Polym Sci 2016. [DOI: 10.1002/app.43581] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
| | - Azam Jalali-Arani
- Department of Polymer Engineering & Color Technology; Amirkabir University of Technology; Tehran Iran
| |
Collapse
|
24
|
Basu D, Das A, Wang DY, George JJ, Stöckelhuber KW, Boldt R, Leuteritz A, Heinrich G. Fire-safe and environmentally friendly nanocomposites based on layered double hydroxides and ethylene propylene diene elastomer. RSC Adv 2016. [DOI: 10.1039/c5ra27444c] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The capability of layered double hydroxide has been explored as a potential flame retardant filler and the effect of the mechanical properties, dynamic mechanical properties, and thermal stability of the composites was also studied.
Collapse
Affiliation(s)
- Debdipta Basu
- Leibniz-Institut für Polymerforschung Dresden e. V
- D-01069 Dresden
- Germany
- Technische Universität Dresden
- Institut für Werkstoffwissenschaft
| | - Amit Das
- Leibniz-Institut für Polymerforschung Dresden e. V
- D-01069 Dresden
- Germany
- Tampere University of Technology
- Tampere
| | | | | | | | - Regine Boldt
- Leibniz-Institut für Polymerforschung Dresden e. V
- D-01069 Dresden
- Germany
| | - Andreas Leuteritz
- Leibniz-Institut für Polymerforschung Dresden e. V
- D-01069 Dresden
- Germany
| | - Gert Heinrich
- Leibniz-Institut für Polymerforschung Dresden e. V
- D-01069 Dresden
- Germany
- Technische Universität Dresden
- Institut für Werkstoffwissenschaft
| |
Collapse
|
25
|
|
26
|
Eili M, Shameli K, Ibrahim NA, Ahmad MB, Wan Yunus WMZ. The effect of the divalent metal on the intercalation capacity of stearate anions into layered double hydroxide nanolayers. J IND ENG CHEM 2015. [DOI: 10.1016/j.jiec.2014.06.025] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
|
27
|
Kabir Chowdhury MN, Ismail AF, Khan MR, Hossen Beg MD, Dzarfan Othman MH, Gohari RJ, Moslehyani A. Physicochemical and micromechanical investigation of a nanocopper impregnated fibre reinforced nanocomposite. RSC Adv 2015. [DOI: 10.1039/c5ra19021e] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
This paper outlines the synthesis of a novel sustainable nanocomposite and the investigation of its physicochemical and mechanical properties using micromechanical models.
Collapse
Affiliation(s)
| | - Ahmad Fauzi Ismail
- Advanced Membrane Technology Research Center
- University Technology Malaysia
- 81310 Johor Bahru
- Malaysia
| | - Maksudur Rahman Khan
- Faculty of Chemical & Natural Resources Engineering
- University Malaysia Pahang
- Kuantan
- Malaysia
| | | | | | - Rasoul Jamshidi Gohari
- Advanced Membrane Technology Research Center
- University Technology Malaysia
- 81310 Johor Bahru
- Malaysia
- Department of Chemical Engineering
| | - Ali Moslehyani
- Advanced Membrane Technology Research Center
- University Technology Malaysia
- 81310 Johor Bahru
- Malaysia
- Department of Chemical and Biological Engineering
| |
Collapse
|
28
|
Laskowska A, Zaborski M, Boiteux G, Gain O, Marzec A, Maniukiewicz W. Effects of unmodified layered double hydroxides MgAl-LDHs with various structures on the properties of filled carboxylated acrylonitrile–butadiene rubber XNBR. Eur Polym J 2014. [DOI: 10.1016/j.eurpolymj.2014.09.013] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
|
29
|
Eshwaran SB, Basu D, Vaikuntam SR, Kutlu B, Wiessner S, Das A, Naskar K, Heinrich G. Exploring the role of stearic acid in modified zinc aluminum layered double hydroxides and their acrylonitrile butadiene rubber nanocomposites. J Appl Polym Sci 2014. [DOI: 10.1002/app.41539] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Subramani Bhagavatheswaran Eshwaran
- Leibniz-Institut für Polymerforschung Dresden e.V.; Hohe Strasse 6 D-01069 Dresden Germany
- Technische Universität Dresden; Institut für Werkstoffwissenschaft; D-01062 Dresden Germany
| | - Debdipta Basu
- Leibniz-Institut für Polymerforschung Dresden e.V.; Hohe Strasse 6 D-01069 Dresden Germany
- Technische Universität Dresden; Institut für Werkstoffwissenschaft; D-01062 Dresden Germany
| | - Sankar Raman Vaikuntam
- Leibniz-Institut für Polymerforschung Dresden e.V.; Hohe Strasse 6 D-01069 Dresden Germany
- Technische Universität Dresden; Institut für Werkstoffwissenschaft; D-01062 Dresden Germany
| | - Burak Kutlu
- Leibniz-Institut für Polymerforschung Dresden e.V.; Hohe Strasse 6 D-01069 Dresden Germany
- Technische Universität Dresden; Institut für Werkstoffwissenschaft; D-01062 Dresden Germany
| | - Sven Wiessner
- Leibniz-Institut für Polymerforschung Dresden e.V.; Hohe Strasse 6 D-01069 Dresden Germany
- Technische Universität Dresden; Institut für Werkstoffwissenschaft; D-01062 Dresden Germany
| | - Amit Das
- Leibniz-Institut für Polymerforschung Dresden e.V.; Hohe Strasse 6 D-01069 Dresden Germany
| | - Kinsuk Naskar
- Rubber Technology Centre; Indian Institute of Technology Kharagpur; Kharagpur India
| | - Gert Heinrich
- Leibniz-Institut für Polymerforschung Dresden e.V.; Hohe Strasse 6 D-01069 Dresden Germany
- Technische Universität Dresden; Institut für Werkstoffwissenschaft; D-01062 Dresden Germany
| |
Collapse
|
30
|
Liu T, Peng H, Miao YE, Tjiu WW, Shen L, Wei C. Synergistic effect of carbon nanotubes and layered double hydroxides on the mechanical reinforcement of nylon-6 nanocomposites. CHINESE JOURNAL OF POLYMER SCIENCE 2014. [DOI: 10.1007/s10118-014-1521-y] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
31
|
Tammaro L, Vittoria V, Bugatti V. Dispersion of modified layered double hydroxides in Poly(ethylene terephthalate) by High Energy Ball Milling for food packaging applications. Eur Polym J 2014. [DOI: 10.1016/j.eurpolymj.2014.01.001] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
32
|
Basu D, Das A, Stöckelhuber KW, Wagenknecht U, Heinrich G. Advances in layered double hydroxide (LDH)-based elastomer composites. Prog Polym Sci 2014. [DOI: 10.1016/j.progpolymsci.2013.07.011] [Citation(s) in RCA: 125] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
|
33
|
Preparation and characterization of polyhydroxybutyrate/polycaprolactone nanocomposites. ScientificWorldJournal 2014; 2014:572726. [PMID: 24600329 PMCID: PMC3926308 DOI: 10.1155/2014/572726] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2013] [Accepted: 11/19/2013] [Indexed: 11/17/2022] Open
Abstract
Polyhydroxybutyrate (PHB)/polycaprolactone (PCL)/stearate Mg-Al layered double hydroxide (LDH) nanocomposites were prepared via solution casting intercalation method. Coprecipitation method was used to prepare the anionic clay Mg-Al LDH from nitrate salt solution. Modification of nitrate anions by stearate anions between the LDH layers via ion exchange reaction. FTIR spectra showed the presence of carboxylic acid (COOH) group which indicates that stearate anions were successfully intercalated into the Mg-Al LDH. The formation of nanocomposites only involves physical interaction as there are no new functional groups or new bonding formed. X-ray diffraction (XRD) and transmission electron microscopy (TEM) indicated that the mixtures of nanocomposites are intercalated and exfoliated types. XRD results showed increasing of basal spacing from 8.66 to 32.97 Å in modified stearate Mg-Al LDH, and TEM results revealed that the stearate Mg-Al LDH layers are homogeneously distributed in the PHB/PCL polymer blends matrix. Enhancement in 300% elongation at break and 66% tensile strength in the presence of 1.0 wt % of the stearate Mg-Al LDH as compare with PHB/PCL blends. Scanning electron microscopy (SEM) proved that clay improves compatibility between polymer matrix and the best ratio 80PHB/20PCL/1stearate Mg-Al LDH surface is well dispersed and stretched before it breaks.
Collapse
|
34
|
|
35
|
Le H, Oßwald K, Wießner S, Das A, Stöckelhuber KW, Boldt R, Gupta G, Heinrich G, Radusch HJ. Location of dispersing agent in rubber nanocomposites during mixing process. POLYMER 2013. [DOI: 10.1016/j.polymer.2013.10.038] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
|
36
|
Coiai S, Pérez Amaro L, Cicogna F, Dintcheva NT, Liguori F, Barbaro P, Passaglia E. Progress in Understanding of the Interactions between Functionalized Polyolefins and Organo-Layered Double Hydroxides. MACROMOL REACT ENG 2013. [DOI: 10.1002/mren.201300154] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Serena Coiai
- Istituto di Chimica dei Composti Organo Metallici (ICCOM), Consiglio Nazionale delle Ricerche, UOS Pisa; Via G. Moruzzi 1 56124 Pisa Italy
| | - Lucía Pérez Amaro
- Istituto di Chimica dei Composti Organo Metallici (ICCOM), Consiglio Nazionale delle Ricerche, UOS Pisa; Via G. Moruzzi 1 56124 Pisa Italy
| | - Francesca Cicogna
- Istituto di Chimica dei Composti Organo Metallici (ICCOM), Consiglio Nazionale delle Ricerche, UOS Pisa; Via G. Moruzzi 1 56124 Pisa Italy
| | - Nadka Tz. Dintcheva
- Dipartimento di Ingegneria Civile, Ambientale, Aerospaziale, dei Materiali; Università di Palermo; Viale delle Scienze, Ed. 6 90128 Palermo Italy
| | - Francesca Liguori
- Istituto di Chimica dei Composti Organo Metallici (ICCOM), Consiglio Nazionale delle Ricerche; Via Madonna del Piano 10 50019 Sesto Fiorentino (FI) Italy
| | - Pierluigi Barbaro
- Istituto di Chimica dei Composti Organo Metallici (ICCOM), Consiglio Nazionale delle Ricerche; Via Madonna del Piano 10 50019 Sesto Fiorentino (FI) Italy
| | - Elisa Passaglia
- Istituto di Chimica dei Composti Organo Metallici (ICCOM), Consiglio Nazionale delle Ricerche, UOS Pisa; Via G. Moruzzi 1 56124 Pisa Italy
| |
Collapse
|
37
|
Enhanced properties of polyurea elastomeric nanocomposites with anisotropic functionalised nanofillers. POLYMER 2013. [DOI: 10.1016/j.polymer.2013.05.056] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
|
38
|
Effect of imidazolium ionic liquid type on the properties of nitrile rubber composites. POLYM INT 2013. [DOI: 10.1002/pi.4550] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
|
39
|
Xiao S, Feng J, Zhu J, Wang X, Yi C, Su S. Preparation and characterization of lignin-layered double hydroxide/styrene-butadiene rubber composites. J Appl Polym Sci 2013. [DOI: 10.1002/app.39311] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Affiliation(s)
- Suo Xiao
- Key Lab of Sustainable Resources Processing and Advanced Materials of Hunan Province; College of Chemistry and Chemical Engineering, Hunan Normal University; Changsha 410081 Hunan China
| | - Jianxiang Feng
- Polymers and Composites Division, Ningbo Institute of Material Technology and Engineering; Chinese Academy of Science; Ningbo 315201 Zhejiang China
| | - Jin Zhu
- Polymers and Composites Division, Ningbo Institute of Material Technology and Engineering; Chinese Academy of Science; Ningbo 315201 Zhejiang China
| | - Xi Wang
- Key Lab of Sustainable Resources Processing and Advanced Materials of Hunan Province; College of Chemistry and Chemical Engineering, Hunan Normal University; Changsha 410081 Hunan China
| | - Chunwang Yi
- Key Lab of Sustainable Resources Processing and Advanced Materials of Hunan Province; College of Chemistry and Chemical Engineering, Hunan Normal University; Changsha 410081 Hunan China
| | - Shengpei Su
- Key Lab of Sustainable Resources Processing and Advanced Materials of Hunan Province; College of Chemistry and Chemical Engineering, Hunan Normal University; Changsha 410081 Hunan China
| |
Collapse
|
40
|
Costantino U, Leroux F, Nocchetti M, Mousty C. LDH in Physical, Chemical, Biochemical, and Life Sciences. DEVELOPMENTS IN CLAY SCIENCE 2013. [DOI: 10.1016/b978-0-08-098259-5.00026-3] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
|
41
|
Zhang R, Huang H, Yang W, Xiao X, Yang J, Hu Y. Preparation and thermal properties of poly(3-hydroxybutyrate-co-4-hydroxybutyrate)/aluminum-containing layered double hydroxides nanocomposites. HIGH PERFORM POLYM 2012. [DOI: 10.1177/0954008312457581] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
In this study, the nanocomposites based on poly(3-hydroxybutyrate- co-4-hydroxybutyrate) (P(3,4)HB) and three kinds of aluminum-containing layered double hydroxides (LDHs) were prepared via melting intercalation. The thermal stability, thermal combustion and thermomechanical properties for these systems were systematically investigated. Both x-ray diffractometry and transmission electron microscopy analyses for P(3,4)HB/LDH system confirm that P(3,4)HB/magnesium–aluminum (MgAl) system has a main exfoliated microstructure and P(3,4)HB/ZnAl system has an intercalated or partially exfoliated microstructure, while P(3,4)HB/NiAl system has an intercalated or phase separated microstructure. The microscale combustion calorimetry results show that the peak of heat release rate for P(3,4)HB/LDH systems, as an important parameter for the assessment of fire hazard of materials, is significantly reduced with the addition of LDHs. The storage modulus of three systems with small amount of LDHs measured by dynamic mechanical analysis is remarkably enhanced. The increment in the storage modulus of P(3,4)HB/LDH nanocomposites will increase with the increase in the atomic number of M2+ of LDHs.
Collapse
Affiliation(s)
- Rui Zhang
- College of Chemical Engineering, Nanjing Forestry University, Nanjing, Jiangsu, China
| | - Hua Huang
- College of Chemical Engineering, Nanjing Forestry University, Nanjing, Jiangsu, China
| | - Wei Yang
- Suzhou Key Laboratory of Urban Public Safety, Suzhou Institute of University of Science and Technology of China, Suzhou, Jiangsu, China
| | - Xifu Xiao
- College of Chemical Engineering, Nanjing Forestry University, Nanjing, Jiangsu, China
| | - Jian Yang
- College of Chemical Engineering, Nanjing Forestry University, Nanjing, Jiangsu, China
| | - Yuan Hu
- Suzhou Key Laboratory of Urban Public Safety, Suzhou Institute of University of Science and Technology of China, Suzhou, Jiangsu, China
| |
Collapse
|
42
|
Arranz-Andrés J, Pérez E, Cerrada M. Hybrids based on poly(vinylidene fluoride) and Cu nanoparticles: Characterization and EMI shielding. Eur Polym J 2012. [DOI: 10.1016/j.eurpolymj.2012.04.006] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
|
43
|
Eili M, Shameli K, Ibrahim NA, Yunus WMZW. Degradability enhancement of poly(lactic acid) by stearate-Zn(3)Al LDH nanolayers. Int J Mol Sci 2012; 13:7938-7951. [PMID: 22942682 PMCID: PMC3430213 DOI: 10.3390/ijms13077938] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2012] [Revised: 05/23/2012] [Accepted: 06/13/2012] [Indexed: 11/16/2022] Open
Abstract
Recent environmental problems and societal concerns associated with the disposal of petroleum based plastics throughout the world have triggered renewed efforts to develop new biodegradable products compatible with our environment. This article describes the preparation, characterization and biodegradation study of poly(lactic acid)/layered double hydroxide (PLA/LDH) nanocomposites from PLA and stearate-Zn(3)Al LDH. A solution casting method was used to prepare PLA/stearate-Zn(3)Al LDH nanocomposites. The anionic clay Zn(3)Al LDH was firstly prepared by co-precipitation method from a nitrate salt solution at pH 7.0 and then modified by stearate anions through an ion exchange reaction. This modification increased the basal spacing of the synthetic clay from 8.83 Å to 40.10 Å. The morphology and properties of the prepared PLA/stearate-Zn(3)Al LDH nanocomposites were studied by X-ray diffraction (XRD), transmission electron microscope (TEM), scanning electron microscope (SEM), thermogravimetric analysis (TGA), tensile tests as well as biodegradation studies. From the XRD analysis and TEM observation, the stearate-Zn(3)Al LDH lost its ordered stacking-structure and was greatly exfoliated in the PLA matrix. Tensile test results of PLA/stearate-Zn(3)Al LDH nanocomposites showed that the presence of around 1.0-3.0 wt % of the stearate-Zn(3)Al LDH in the PLA drastically improved its elongation at break. The biodegradation studies demonstrated a significant biodegradation rate improvement of PLA in the presence of stearate-Zn(3)Al LDH nanolayers. This effect can be caused by the catalytic role of the stearate groups in the biodegradation mechanism leading to much faster disintegration of nanocomposites than pure PLA.
Collapse
Affiliation(s)
- Mahboobeh Eili
- Department of Chemistry, Faculty of Science, Universiti Putra Malaysia, Serdang, Selangor 43400, Malaysia; E-Mail:
| | - Kamyar Shameli
- Department of Chemistry, Faculty of Science, Universiti Putra Malaysia, Serdang, Selangor 43400, Malaysia; E-Mail:
| | - Nor Azowa Ibrahim
- Department of Chemistry, Faculty of Science, Universiti Putra Malaysia, Serdang, Selangor 43400, Malaysia; E-Mail:
| | - Wan Md Zin Wan Yunus
- Department of Chemistry, Centre for Defence Foundation Studies, National Defence University of Malaysia, Kuala Lumpur 57000, Malaysia; E-Mail:
| |
Collapse
|
44
|
Yang W, Miao J, Xia R, Qian J, Zhang Y. On Surface Modification of Nano-TiN with Graft Copolymer LMPB-g-KH570. J DISPER SCI TECHNOL 2012. [DOI: 10.1080/01932691.2011.590119] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
|
45
|
Feng J, Liao Z, Zhu J, Su S. Comparison of morphology and mechanical properties of peroxide-cured acrylonitrile butadiene rubber/LDH composites prepared from different organically modified LDHs. J Appl Polym Sci 2012. [DOI: 10.1002/app.37746] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
|
46
|
Abstract
It is well recognized that nanocomposites formed by adding nanoparticles to polymers can have significantly enhanced properties relative to the native polymer. This review focuses on three aspects that are central to the outstanding problem of realizing these promised property improvements. First, we ask if there exist general strategies to control nanoparticle spatial distribution. This is an important question because it is commonly accepted that the nanoparticle dispersion state crucially affects property improvements. Because ideas on macroscale composites suggest that optimizing different properties requires different dispersion states, we next ask if we can predict a priori the particle dispersion and organization state that can optimize one (or more) properties of the resulting nanocomposite. Finally, we examine the role that particle shape plays in affecting dispersion and hence property control. This review focuses on recent advances concerning these underpinning points and how they affect measurable properties relevant to engineering applications.
Collapse
Affiliation(s)
- Sanat K Kumar
- Department of Chemical Engineering, Columbia University, New York, NY 10027, USA.
| | | |
Collapse
|
47
|
Qu L, Yu G, Wang L, Li C, Zhao Q, Li J. Effect of filler-elastomer interactions on the mechanical and nonlinear viscoelastic behaviors of chemically modified silica-reinforced solution-polymerized styrene butadiene rubber. J Appl Polym Sci 2012. [DOI: 10.1002/app.36677] [Citation(s) in RCA: 55] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
|
48
|
Das A, George JJ, Kutlu B, Leuteritz A, Wang DY, Rooj S, Jurk R, Rajeshbabu R, Stöckelhuber KW, Galiatsatos V, Heinrich G. A Novel Thermotropic Elastomer based on Highly-filled LDH-SSB Composites. Macromol Rapid Commun 2012; 33:337-42. [DOI: 10.1002/marc.201100735] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2011] [Indexed: 11/11/2022]
|
49
|
Herrero M, Martínez-Gallegos S, Labajos F, Rives V. Layered double hydroxide/polyethylene terephthalate nanocomposites. Influence of the intercalated LDH anion and the type of polymerization heating method. J SOLID STATE CHEM 2011. [DOI: 10.1016/j.jssc.2011.08.017] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
50
|
Rooj S, Das A, Heinrich G. Tube-like natural halloysite/fluoroelastomer nanocomposites with simultaneous enhanced mechanical, dynamic mechanical and thermal properties. Eur Polym J 2011. [DOI: 10.1016/j.eurpolymj.2011.06.007] [Citation(s) in RCA: 64] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|