Electrospun multi-scale hybrid nanofiber/net with enhanced water swelling ability in rubber composites

Zhao, Jinchao; Dehbari, Nazila; Han, Wei; Huang, Leping; Tang, Youhong

doi:10.1016/j.matdes.2015.07.105

Cited by 37 publications

(24 citation statements)

References 51 publications

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“…31 The characteristic , indicating the existence of PAA main chains. 48 During the neutralization process of PAA by NaOH, -COOH groups of AA were partially converted into -COONa, as shown in Fig. 1(b).…”

Section: Molecular Interactions Within Hydrogelsmentioning

confidence: 99%

In situ polymerized hyperbranched polymer reinforced poly(acrylic acid) hydrogels

Dehbari

Tavakoli

Khatrao

et al. 2017

Mater. Chem. Front.

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a Hydrogels have been extensively investigated for use in various applications. Poly acrylic acid (PAA) is a common example, which has been widely used due to its super hydrophilicity properties, biocompatibility and biodegradability characteristics. However its poor mechanical properties, which have been addressed in many research studies, are known as a drawback that limits its applications. So, enhancing PAA mechanical properties using a hyperbranched polymer (HB) is the key question to be addressed in this research.Investigations of the mechanical properties of the PAA-HB hydrogel revealed 130% improvement in the ultimate tensile strength, indicating a two times enhancement compared to that of PAA. Statistical analysis showed that the overall effect of introducing notches (with different depths) on the selected mechanical properties of both PAA and PAA-HB was significant. Mechanical characterization of PAA-HB networks showed that significant improvement in the mechanical properties was achieved as the capability of water uptake increased by 20%. Characterization of the physical properties confirmed that participation of HB may form a PAA based hybrid material with good swelling properties. Those findings are attributed to the supramolecular structure of the HB, which can introduce physical entanglement between the PAA network structure and increase the crystallinity of the final hydrogel as compared to those from the PAA hydrogel.

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Section: Molecular Interactions Within Hydrogelsmentioning

confidence: 99%

In situ polymerized hyperbranched polymer reinforced poly(acrylic acid) hydrogels

Dehbari

Tavakoli

Khatrao

et al. 2017

Mater. Chem. Front.

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“…The use of doubleneedle electrospinning was effective for creating an entangled network consisting of two different types of fiber with sizes ranging from submicron to nanometer. Arrangement of these fibers resulted in the formation of a spiderweb‐like structure that increased the hydrophilicity and specific surface area while also affecting porosity . Figure d shows a WSR composite with randomly distributed PAA/SBS nanofibers in the dry state.…”

Section: Resultsmentioning

confidence: 90%

“…However, SAPs trapped within the rubber matrix remained isolated. In further experiments, we observed that poly(acrylic acid) (PAA) nanofibers in WSR composites could produce feasible connections known as water channels between SAPs, thereby transferring water between SAPs efficiently. Furthermore, the introduction of nanofibers/mats into WSR composites has led to significant improvement in the mechanical properties of WSR, depending on the type of nanofiber .…”

Section: Introductionmentioning

confidence: 99%

Enhancing water swelling ability and mechanical properties of water‐swellable rubber by PAA/SBS nanofiber mats

Dehbari

Tavakoli

Zhao

et al. 2016

J of Applied Polymer Sci

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Investigation of the potential use of nanofibers to reinforce composites has gained significance in many applications. In this article, the nanofiber mats of poly(acrylic acid) (PAA) and styrene–butadiene–styrene (SBS) triblock copolymer with composites structure were interweaved by double needle electrospinning process. The multiple nanofiber mats were added to conventional water‐swellable rubber (WSR). Improved mechanical and physical properties of WSR were obtained. Enhancement of the swellability of WSR + PAA/SBS nanofiber mats was derived from the PAA constituent absorbing water from the surface into the bulk and introducing random internal water channels between discontinuous superabsorbent polymers. The role of SBS nanofibers in the composite of WSR + PAA/SBS nanofiber mats was more related to the mechanical properties, where the breaking force of the composite increased to twice that of the conventional WSR. Interestingly, after immersion of the WSR + PAA/SBS nanofiber mats in water for 1 week, there was only a slight decrease in their mechanical properties of less than 5% compared to the dry state. The mechanisms and effects of the nanofiber mats in enhancing the mechanical and water swelling properties of WSR are also discussed. © 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016, 133, 44213.

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“…The water absorption property has been documented in several previous reports related to superabsorbent hydrogels, whereby the researchers calculated the weight variation of the material before and after absorption . However, the thickness and the weight of nanowebs are too small to be calculated.…”

Section: Resultsmentioning

confidence: 99%

Fabrication of superabsorbent nanofibers based on sodium polyacrylate/poly(vinyl alcohol) and their water absorption characteristics

Choi

Kim

2019

Polymer International

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Superabsorbent polymers (SAPs) have been widely studied and used in various industries. In this study, SAPs based on sodium polyacrylate (NaPAA) and poly(vinyl alcohol) were successfully prepared in the form of nanofibers using the electrospinning technique. The heat‐treated superabsorbent nanofibers (SANs) with 7 wt% of NaPAA and containing both crystal structures and crosslinks presented the best absorption performance, with up to 3.9 times and 134% increase in the absorption area and swelling ratio, respectively. Furthermore, the crystal structure and crosslinking of the SANs enabled them to maintain their fiber network during water absorption and recovery. The absorption rate of SANs having both crystal structures and crosslinks was slightly lower than that of nanofibers with only crystal structures, but it was still higher than that of SAPs because of the highly porous nature of the nanowebs. The easy processing and structural stability of SANs are expected to be useful in a wide range of applications. © 2019 Society of Chemical Industry

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Electrospun multi-scale hybrid nanofiber/net with enhanced water swelling ability in rubber composites

Cited by 37 publications

References 51 publications

In situ polymerized hyperbranched polymer reinforced poly(acrylic acid) hydrogels

In situ polymerized hyperbranched polymer reinforced poly(acrylic acid) hydrogels

Enhancing water swelling ability and mechanical properties of water‐swellable rubber by PAA/SBS nanofiber mats

Fabrication of superabsorbent nanofibers based on sodium polyacrylate/poly(vinyl alcohol) and their water absorption characteristics

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