Preparation of low‐allergen natural rubber latex by transglutaminase catalysis

Sun, Jinyu; Tian, Xiaohui; Ping, Feng; Gong, Shuting; Yuan, Yongbo

doi:10.1002/app.38963

Cited by 5 publications

(3 citation statements)

References 24 publications

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“…Mechanical properties. Tensile strength was determined by a slightly modified GB7543-2006 method [21]. It was carried out by universal test tension machine (CMT2202) and the stretching rate was 400 mm/min.…”

Section: Methodsmentioning

confidence: 99%

Mechanical Properties and Thermal Resistance of Natural Rubber Nanocomposite Reinforced with Quaternized Polyvinyl Alcohol/Silica Nanoclusters

Liu

Tian

Sun

et al. 2016

JNanoR

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Quaternized polyvinyl alcohol (QPVA) was synthesized and used as an intermedium to improve dispersion of silica (SiO2) in natural rubber (NR). QPVA/SiO2 nanoclusters reinforced NR nanocomposite was prepared by latex compounding via electrostatic interaction. TEM micrographs demonstrated QPVA/SiO2 nanoclusters were distributed around NR particles, forming shell-core structure. The mechanical properties and thermal ageing resistance of NR-QPVA/SiO2 were significantly improved compared with that of neat NR. The tensile strength of NR-QPVA/SiO2 film was improved by 60%, when the SiO2 content is 3%. SEM pictures indicated SiO2 was homogenous dispersed throughout NR matrix in the presence of QPVA. It also demonstrated that SiO2 could enhance thermal stability of NR, as NR-QPVA/SiO2 had best surface morphology after 72 hours thermal ageing at 100 °C. The thermal decomposition temperature and glass transition temperature of NR-QPVA/SiO2 film increased to a higher temperature due to strong polymer–filler interaction, which also indicated that all the ingredients were compatible and homogenous.

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Section: Methodsmentioning

confidence: 99%

Mechanical Properties and Thermal Resistance of Natural Rubber Nanocomposite Reinforced with Quaternized Polyvinyl Alcohol/Silica Nanoclusters

Liu

Tian

Sun

et al. 2016

JNanoR

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“…After extraction, ammonia was used to keep the liquid latex, and this material was centrifuged at 8000rpm. The centrifugation was important because it reduced some proteins contained in natural latex that cause allergic reactions [8,9]. …”

Section: Methodsmentioning

confidence: 99%

Natural Latex Films as Carrier for Casearia sylvestris Swartz Extract Associated with Ciprofloxacin

Bolognesi¹,

Borges²,

Cinman³

et al. 2015

ACSJ

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In order to create a new sustained drug delivery system applied for tissue regeneration, this study beget a natural rubber latex (NRL) film with Casearia sylvestris extract and ciprofloxacin. Manipulated from the biomaterial latex obtained by the rubber tree Hevea brasiliensis, the NRL film has shown to be a great angiogenic compound and also has shown a great potential in being a possible carrier for sustained drug release. In order to increase the therapeutic spectrum of the film two substances was added to it: the C. sylvestris extract which has antiulcer, anti-inflammatory and Bolognesi et al.; ACSj, 5(1): 17-25, 2015; Article no. ACSj.2015.003 18 wound healing effects due to its casearins and the antibiotic ciprofloxacin which is considered as one of the main drugs used for open wounds in the skin. The study occurred at State São Paulo University in Assis (UNESP-FCL), Brazil. The substances were mixed and a film was made by casting at ambient temperature creating circular films with 5cm of diameter. After that the film was placed in 1 liter of water to start the release study. The release behavior was analyzed by UV-VIS spectrophotometry being the casearins related to the wavelength of 235nm and the ciprofloxacin of 320nm. The film supported the release of compounds, releasing 93.73% of the extract and 56.53% of the drug, along 29 hours. In addition, the incorporation was proven by Scanning Electron Microscopy (SEM), which showed the morphology of pure and incorporated films and also by Fourier Transform Infrared Spectroscopy (FTIR) which has shown that no chemical change occurred during the process. Thereby, according to results, the material has a possible approach to biomedical application. Original Research Article

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“…Natural rubber latex (NRL), extracted from Hevea brasiliensis tree, are widely used in manufacturing dipped products such as medical gloves, balloons, and condoms due to its low cost, excellent elasticity, and film‐forming property. However, the poor tensile strength of unvulcanized NRL film is a serious defect and limits its application in certain areas.…”

Section: Introductionmentioning

confidence: 99%

Morphology and mechanical properties of natural rubber latex films modified by exfoliated Na‐montmorillonite/polyethyleneimine‐g‐poly (methyl methacrylate) nanocomposites

Wang

Tian

Sun

et al. 2016

J of Applied Polymer Sci

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Na-montmorillonite/polyethyleneimine-g-poly(methyl methacrylate) (Na-MMT/PEI-g-PMMA) nanocomposite latexes were prepared by soap-free emulsion polymerization in the aqueous suspension of Na-MMT. The exfoliated morphology of the nanocomposites was confirmed by XRD and TEM. With the aim of improving morphology and mechanical properties of natural rubber latex (NRL) films, the synthesized Na-MMT/PEI-g-PMMA nanocomposites were mixed with NRL by latex compounding technology. The results of SEM and AFM analysis showed that the surface of NRL/Na-MMT/PEI-g-PMMA film was smoother and denser than that of pristine NRL film while Na-MMT was dispersed uniformly on the fracture surface of the modified films, which suggested the good compatibility between NRL and Na-MMT/PEI-g-PMMA. The tensile strength of NRL/Na-MMT/PEI-g-PMMA films was increased greatly by 85% with 10 phr Na-MMT/PEI-g-PMMA when Na-MMT content was 3 wt % and the elongation at break also increased from 930% to 1073% at the same time.The purpose of this work was to investigate the effects of Namontmorillonite/polyethyleneimine-g-poly(methyl methacrylate) (Na-MMT/PEI-g-PMMA) nanocomposites on the morphology and mechanical properties of NRL films. Na-MMT/PEI-g-PMMA nanocomposite latexes were prepared by soap-free emulsion polymerization. 23,24 An amphipathic macromolecule PEI was introduced into the gallery of Na-MMT and formed

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Preparation of low‐allergen natural rubber latex by transglutaminase catalysis

Cited by 5 publications

References 24 publications

Mechanical Properties and Thermal Resistance of Natural Rubber Nanocomposite Reinforced with Quaternized Polyvinyl Alcohol/Silica Nanoclusters

Mechanical Properties and Thermal Resistance of Natural Rubber Nanocomposite Reinforced with Quaternized Polyvinyl Alcohol/Silica Nanoclusters

Natural Latex Films as Carrier for Casearia sylvestris Swartz Extract Associated with Ciprofloxacin

Morphology and mechanical properties of natural rubber latex films modified by exfoliated Na‐montmorillonite/polyethyleneimine‐g‐poly (methyl methacrylate) nanocomposites

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