Ultra-strong gel-spun ultra-high molecular weight polyethylene fibers filled with chitin nanocrystals

An, Minfang; Xu, Haojun; Lv, You; Duan, Tianchen; Tian, Feng; Liang, Hong; Gu, Qun; Wang, Zongbao

doi:10.1039/c5ra25786g

Cited by 21 publications

(14 citation statements)

References 34 publications

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“…The in situ WAXD results in Figure show that the diffraction patterns corresponding to (110) and (200) orthorhombic crystalline plane of UHMWPE change from arc to point, which also supports the transformation from shish‐kebab to shish crystals (composed mostly of extended chain crystals). While there usually generates monoclinic phase of UHMWPE in the fibers that go through the higher stretching ratio in product line, but it was not observed in this experiment possibly because of low stretching rate, which is same to the result of Tian et al The DSC curves of final UHMWPE fibers present two obvious melting peaks. The first melting peak between 142 and 146 °C is caused by the melting of micro‐fibrils crystals, and the second melting peak located between 150 and 153 °C is the result of the orthorhombic‐to‐hexagonal phase transition.…”

Section: Resultssupporting

confidence: 53%

Structural transformation from shish‐kebab crystals to micro‐fibrils through hot stretching process of gel‐spun ultra‐high molecular weight polyethylene fibers with high concentration solution

Yao

et al. 2017

J Polym Sci B Polym Phys

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Structural evolution of gel‐spun ultra‐high molecular weight polyethylene fibers with high concentration solution via hot stretching process was investigated by in situ small‐angle X‐ray scattering, in situ wide‐angle X‐ray diffraction measurements, scanning electron microscopy, and differential scanning calorimetry. With the increase of stretching strain, the long period continuously increases at relative lower stretching temperature, while it first increases and then decreases rapidly at relative higher stretching temperature. The kebab thickness almost keeps constant during the whole hot‐stretching process and the kebab diameter continually decreases for all stretching temperatures. Moreover, the length of shish decreases slightly and the shish quantity increases although there is almost no change in the diameter of shish crystals during the hot stretching process. The degree of crystal orientation at different temperatures is as high as above 0.9 during the whole stretching process. These results indicate that the shish‐kebab crystals in ultra‐high molecular weight polyethylene fibers can transform continuously into the micro‐fibril structure composed mostly of shish crystals through the hot stretching process. © 2017 Wiley Periodicals, Inc. J. Polym. Sci., Part B: Polym. Phys. 2018, 56, 225–238

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Section: Resultssupporting

confidence: 53%

Structural transformation from shish‐kebab crystals to micro‐fibrils through hot stretching process of gel‐spun ultra‐high molecular weight polyethylene fibers with high concentration solution

Yao

et al. 2017

J Polym Sci B Polym Phys

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“…For UHMWPE fibres, a slight difference in melting temperature ( T m ) between obtained and the one reported by the producer (144–152°C) was shown due to the environmental and storage conditions like humidity, increased storage temperature, DSC set parameters and so on. 30 EVA copolymer is a partially crystalline polymer that consists of crystalline ethylene segments and also a non-crystalline (amorphous) vinyl acetate segments. 7 An endothermic peak was typical for crystal melting of ethylene sequences in EVA copolymer, 31 which was low (Δ H m 1 = 8.708 J g −1 ), Table 2.…”

Section: Resultsmentioning

confidence: 99%

Processing and characterization of UHMWPE composite fibres with alumina particles in poly(ethylene-vinyl acetate) matrix

Zec

Tomić

Zrilić

et al. 2017

Journal of Thermoplastic Composite Materials

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Processing of hybrid composites represents a challenge for engineers where the aim is to establish compatibility among several materials. The aim of this study is to evaluate the effects of different size and morphology of alumina fillers on the mechanical and thermal properties of the composite fibers based on ultra-high molecular weight polyethylene fibers (UHMWPE).These fibers have an outstanding elastic modulus and they are compatible with nonpolar sequences of the poly(ethylene-co-vinyl acetate) (EVA) matrix. Compared to the fibers, inferior mechanical properties of the matrix can be improved using alumina particles. Commercial Al 2 O 3 nanoparticles, commercial whiskers and synthesized particles of Al 2 O 3 doped with iron oxide, incorporated in different weight percent were used as fillers. The UHMWPE fibers were impregnated using the solution of EVA in toluene with dispersed particles. FT-IR and FE-SEM were used for structural examination. Tensile testing revealed increasing of modulus of elasticity and strengths of obtained hybrid composite fibers. Thermal gravimetry showed improved thermal stability up to 350°C of the hybrid composite fibers with alumina particles doped with iron oxide. Results of tested samples showed that the best mechanical properties were for hybrid composite fibers with 1 wt.% of iron doped alumina filler.

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“…5 The production process of UHMWPE fibers called gel spinning determines whether the degree of crystallinity and the level of macromolecular orientation of the product were high, which could help the product to get a high tenacity. 6,7 However, some problems such as low surface energy and poor surface adhesion constrain its applications. 8,9 Many techniques have been studied to address the shortcomings of UHMWPE fibers for biomedical applications.…”

Section: Introductionmentioning

confidence: 99%

Surface modification of vascular endothelial growth factor-loaded silk fibroin to improve biological performance of ultra-high-molecular-weight polyethylene via promoting angiogenesis

Ai¹,

Sheng²,

Cai³

et al. 2017

IJN

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Ultra-high-molecular-weight polyethylene (UHMWPE) has been applied in orthopedics, as the materials of joint prosthesis, artificial ligaments, and sutures due to its advantages such as high tensile strength, good wear resistance, and chemical stability. However, postoperative osteolysis induced by UHMWPE wear particles and poor bone–implant healing interface due to scarcity of osseointegration is a significant problem and should be solved imperatively. In order to enhance its affinity to bone tissue, vascular endothelial growth factor (VEGF) was loaded on the surface of materials, the loading was performed by silk fibroin (SF) coating to achieve a controlled-release delivery. Several techniques including field emission scanning electron microscopy (FESEM) and attenuated total reflectance (ATR)-Fourier transform infrared (FTIR) and water contact angle measurement were used to validate the effectiveness of introduction of SF/VEGF. The result of ELISA demonstrated that the release of VEGF was well maintained up to 4 weeks. The modified UHMWPE was evaluated by both in vitro and in vivo experiments. According to the results of FESEM and cell counting kit-8 (CCK-8) assay, bone marrow mesenchymal stem cells cultured on the UHMWPE coated with SF/VEGF and SF exhibited a better proliferation performance than that of the pristine UHMWPE. The model rabbit of anterior cruciate ligament reconstruction was used to observe the graft–bone healing process in vivo. The results of histological evaluation, microcomputed tomography (micro-CT) analysis, and biomechanical tests performed at 6 and 12 weeks after surgery demonstrated that graft–bone healing could be significantly improved due to the effect of VEGF on angiogenesis, which was loaded on the surface by SF coating. This study showed that the method loading VEGF on UHMWPE by SF coating played an effective role on the biological performance of UHMWPE and displayed a great potential application for anterior cruciate ligament reconstruction.

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Ultra-strong gel-spun ultra-high molecular weight polyethylene fibers filled with chitin nanocrystals

Abstract: Ultra-high molecular weight polyethylene (UHMWPE)/chitin nanocrystals (CNC) and UHMWPE/acetylated chitin nanocrystals (ACNC) fibers were prepared.

Cited by 21 publications

References 34 publications

Structural transformation from shish‐kebab crystals to micro‐fibrils through hot stretching process of gel‐spun ultra‐high molecular weight polyethylene fibers with high concentration solution

Structural transformation from shish‐kebab crystals to micro‐fibrils through hot stretching process of gel‐spun ultra‐high molecular weight polyethylene fibers with high concentration solution

Processing and characterization of UHMWPE composite fibres with alumina particles in poly(ethylene-vinyl acetate) matrix

Surface modification of vascular endothelial growth factor-loaded silk fibroin to improve biological performance of ultra-high-molecular-weight polyethylene via promoting angiogenesis

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