Fast and simple construction of composite films with renewable Eucommia ulmoides gum and Poly(ε-caprolactone)

Yue, Panpan; Leng, Zejian; Bian, Jing; Li, Mingfei; Peng, Feng; Sun, Run‐Cang

doi:10.1016/j.compscitech.2019.05.010

Cited by 18 publications

(8 citation statements)

References 33 publications

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“…There are two crystalline forms in gutta-percha [25,26], namely αand β-crystalline forms. As shown in Figure 10a, the peaks at 11.4 • , 17.9 • , 26.9 • , 30.8 • , and 33.5 • are the characteristic peaks of the α-crystalline form of gutta-percha, while the peaks at 19.1 • and 22.8 • are the characteristic peaks of the β-crystalline form [27,28], showing that the extracted gutta-percha maintains its natural crystalline structure.…”

Section: Xrd Analysismentioning

confidence: 94%

Extraction of High-Purity Native State Gutta-Percha from Enzymatic Hydrolyzed Eucommia ulmoides Pericarps by Ultrasound Treatment and Surfactant Aqueous Phase Dispersion

Shi

Zhang

et al. 2022

Agriculture

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Herein, a method of ultrasound treatment combined with surfactant aqueous phase dispersion was proposed for the extraction of high-purity gutta-percha in its native state from enzymatic hydrolyzed Eucommia ulmoides pericarps. Firstly, the plant tissues wrapped around gutta-percha were destructed through enzymatic hydrolysis, then the plant tissues debris still attached to gutta-percha were further stripped off by ultrasound. Finally, under the “amphiphilic” action of sodium dodecyl sulfate (SDS), the entangled gutta-percha was untwined, allowing the residual plant tissue debris to be released and precipitated, thus high purity gutta-percha was obtained. The process parameters were optimized through single factor and response surface experiments. The optimal parameters for ultrasonic treatment were displayed as follows: frequency of 40 kHz, power of 320 W, time of 7.3 h, temperature of 50 °C, and material-to-liquid ratio of 1:70 g/mL, and for the aqueous phase dispersion of surfactant were SDS concentration 1.7%, temperature 80 °C, stirring speed 1200 rpm, solid-to-liquid ratio 1:60 g/mL, and time 60 h. Under optimal conditions, the purity of gutta-percha reached 95.4 ± 0.31% and its weight average molecular weight (Mw) was 20.85 × 104. Moreover, the obtained gutta-percha maintained its native filamentous form. The obtained products were characterized by IR, NMR, XRD, TGA, DSC, and tensile experiments, which showed that the obtained product was gutta-percha and maintained the natural α- and β- crystal structure. The proposed method overcomes the disadvantages of the traditional organic solvent method, which has great environmental pollution and destroys the gutta-percha structure. This is also the first reported method to obtain high purity gutta-percha while maintaining its native state.

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Section: Xrd Analysismentioning

confidence: 94%

Extraction of High-Purity Native State Gutta-Percha from Enzymatic Hydrolyzed Eucommia ulmoides Pericarps by Ultrasound Treatment and Surfactant Aqueous Phase Dispersion

Shi

Zhang

et al. 2022

Agriculture

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“…The peaks at 1665, 2840, and 2910 cm –1 are attributed to the stretching vibration of CC, CH, and CH 2 of EUR, respectively. NMR (Figure d–f) exhibits the characteristic signals at δ 39.8/1.9–2.3, 134.9, 124.3/5.1, 26.7/1.9–2.3, and 16.3/1.6 ppm attributed to C1/H1, C2, C3/H3, C4/H4, and C5/H5, respectively. ,− Especially, the trans -configuration of EUR can be proven by H5 with the characteristic signal at δ 1.68 ppm, which is distinct with the cis -configuration of NR for H5 at δ 1.80 ppm. , In XPS spectra (Figure g), the C 1s narrow region spectra at 284.6 and 284.8 eV indicate CC and CC, CH carbon groups, respectively, which account for ∼77.3% and ∼22.7%, respectively.…”

Section: Properties Of Eucommia Ulmoides Rubbermentioning

confidence: 96%

“…Spectral Characterization. In FTIR spectra (Figure 6a), 59,92,136 the absorption peaks at 2947, 2915, and 2840 cm −1 arise from the CH 3 asymmetric stretching, CH 2 asymmetric stretching, and CH 2 symmetric stretching, respectively. The signal at 1594 cm −1 is assigned to CC stretching vibration, while the signals at 1364 and 1457 cm −1 are originated from the CH 2 deformation vibration and in-plane bending motion of EUR, respectively.…”

Section: Properties Ofmentioning

confidence: 99%

“…Besides, the absorption peaks at 876, 798, 778, and 571 cm –1 are attributed to EUR extra crystallization. With the development of spectral technologies, the Raman, NMR, and XPS are used to characterize the chemical composition and molecular structure of EUR. ,, In Raman spectra (Figure b), ,− the weak peaks in the region of 1280–1420 cm –1 belong to the bending vibration of CH 2 . The peaks at 1665, 2840, and 2910 cm –1 are attributed to the stretching vibration of CC, CH, and CH 2 of EUR, respectively.…”

Section: Properties Of Eucommia Ulmoides Rubbermentioning

confidence: 99%

“…Potential fields of application (e.g., environment, engineering, agriculture, and biomedical engineering) of EUR-based materials [Reprinted with permission from refs (Copyright 2018 Elsevier), (Copyright 2020 Elsevier), (Copyright 2019 Elsevier), (Copyright 2020 Elsevier), (Copyright 2020 Elsevier), (Copyright 2019 Elsevier), (Copyright 2019 Elsevier), (Copyright 2019 Royal Society of Chemistry), (Copyright 2020 Elsevier), (Copyright 2020 Elsevier), and (Copyright 2020 Elsevier)].…”

Section: Fabrication and Potential Applications Of Eucommia Ulmoides ...mentioning

confidence: 99%

See 2 more Smart Citations

Natural Polymer Eucommia Ulmoides Rubber: A Novel Material

Wei

Peng

et al. 2021

J. Agric. Food Chem.

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As the second natural rubber resource, Eucommia ulmoides rubber (EUR) from Eucommia ulmoides Oliver is mainly composed of trans-1,4-polyisoprene, which is the isomer of natural rubber cis-1,4-polyisoprene from Hevea brasiliensis. In the past few years, the great potential application of EUR has received increasing attention, and there is a growing awareness that the natural polymer EUR could become an emerging research topic in field of the novel materials due to its unique and excellent duality of both rubber and plastic. To gain insight into its further development, in this review, the extraction, structure, physicochemical properties, and modification of EUR are discussed in detail. More emphasis on the potential applications in the fields of the environment, agriculture, engineering, and biomedical engineering is summarized. Finally, some insights into the challenges and perspectives of EUR are also suggested.

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A high toughness elastomer based on natural Eucommia ulmoides gum

Zhao

et al. 2020

J of Applied Polymer Sci

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Eucommia ulmoides gum (EUG) is a kind of bio-based polymer with similar structure to natural rubber (NR). However, it behaves as hard plastic at room temperature due to crystallization, which makes it not as widely used as NR. Herein, a new bio-based elastomer (HEUG) was prepared by rhodiumcatalyzed hydrogenation of EUG for the first time. 1 H-NMR and 13 C-NMR spectroscopy confirmed the structure of HEUG, and wide angle X-ray diffraction, polarizing light microscopy showed that the crystal was gradually destroyed in the hydrogenation process, finding that when the degree of hydrogenation is more than 16.5%, HEUG transformed from plastic to elastomer at room temperature. Besides, the Synchrotron Radiation experiment showed that HEUG with hydrogenation of 85.9% could be self-reinforced by strain-induced crystallization during stretching, which make it has excellent tensile strength and toughness (21.4 MPa and 68.1 MJ m −3 , respectively). This new bio-based elastomer has the potential to replace NR and has a wide application prospect in rubber industry.

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Fast and simple construction of composite films with renewable Eucommia ulmoides gum and Poly(ε-caprolactone)

Cited by 18 publications

References 33 publications

Extraction of High-Purity Native State Gutta-Percha from Enzymatic Hydrolyzed Eucommia ulmoides Pericarps by Ultrasound Treatment and Surfactant Aqueous Phase Dispersion

Extraction of High-Purity Native State Gutta-Percha from Enzymatic Hydrolyzed Eucommia ulmoides Pericarps by Ultrasound Treatment and Surfactant Aqueous Phase Dispersion

Natural Polymer Eucommia Ulmoides Rubber: A Novel Material

A high toughness elastomer based on natural Eucommia ulmoides gum

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