Physicochemical and antimicrobial properties of natural rubber latex films in the presence of vegetable oil microemulsions

Lee, Siang Yin; Ng, Angie; Singh, Manroshan; Liew, Yun Khoon; Gan, Seng Neon; Koh, Rhun Yian

doi:10.1002/app.44788

Cited by 10 publications

(4 citation statements)

References 40 publications

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“…On the other hand, soybean oil is mainly composed of long chain triaglycerols (LCTs) that are less soluble in microemulsions due to long chain fatty acids which are bulky enough and unable to reach the interfacial film . Similarly, in a comparative study for microemulsions formed with vegetable oils (coconut, palm kernel and soybean oil) larger droplet sizes are reported for LCT oils (Lee et al, 2017).…”

Section: Microemulsion Sizementioning

confidence: 80%

Fortification of chocolate usingMoringa oleiferaextract encapsulated in microemulsions

Kaltsa

Alibade

Batra

et al. 2021

OCL

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The aim of the present study was to evaluate the physical and antioxidant properties of microemulsions containing Moringa oleifera leaf extract (MLE) produced by the means of a deep eutectic solvent. Selected microemulsions containing MLE were incorporated in chocolate products to enrich them. Their color properties including CIE L*, a*, b* parameters and whitening index (WI) along with DPPH radical scavenging activity were assessed during a period of 8 months. The antioxidant activity of microemulsions depended on the oil phase used, while it was unaffected by the concentration of MLE. Samples prepared with soybean oil as oil phase containing MLE presented the highest radical inhibition percentage (I% = 26.8–27.8%). Coconut microemulsions were finally incorporated at 2 and 4% w/w concentration into chocolate products, as coconut oil is a known cocoa butter substitute. Although the incorporation of MLE microemulsions did not affect the color properties of most of the chocolates, enriched products did not exhibit superior antioxidant activity compared to control samples.

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Section: Microemulsion Sizementioning

confidence: 80%

Fortification of chocolate usingMoringa oleiferaextract encapsulated in microemulsions

Kaltsa

Alibade

Batra

et al. 2021

OCL

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“…Considering the green chemistry movement, vegetable oils can be used for extension of these rubbers. 16 Various researchers have used vegetable oils for extension of solution and emulsion SBR's for environmental sustainability, processing, and performance improvement. [17][18][19][20][21][22][23] SSBR was extended with Soybean, Sunflower, Canola, Corn, Coconut, Cottonseed, Olive, Palm, Peanut and Safflower oils and improvement in abrasion resistance and tear strength with comparable physical properties was observed as compared to SSBR extended with naphthenic oil.…”

Section: Introductionmentioning

confidence: 99%

Use of vegetable oils as an alternate to naphthenic oil for extension of emulsion styrene butadiene rubber

Agrawal,

Kumawat,

Salvi

et al. 2023

Journal of Elastomers & Plastics

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Various petroleum based mineral oils like Distillate Aromatic Extract (DAE), Treated Distillate Aromatic Extract (TDAE), Residual Aromatic Extract (RAE) and Naphthenic oils are used for extension of emulsion polymerized Styrene Butadiene Rubber (E-SBR). Vegetable oils are alternate to these petroleum oil from sustainability point of view as vegetable oils have no Polycyclic Aromatic (PCA) content. They improve abrasion resistance leads to less rubber particulates spread in the environment and reduce rolling resistance leads to lower fuel consumption. However, introduction of few vegetable oils leads to slow down the cure reaction due to high unsaturation to saturation ratio. Presence of high fatty acid content in vegetable oils help in better rubber-filler interaction. In the present research, vegetable origin oils as such without any modification (Decas, Palmolein, Groundnut, Soybean, Mustard and Coconut) extended Styrene Butadiene Rubber (OE-SBR) were characterized in standard American Society for Testing and Materials (ASTM) compound recipe for various processing, different vulcanizate and other performance properties. Curative’s dosages were adjusted in the recipe of vegetable oil extended SBR’s to achieve the 300% modulus value like naphthenic oil. Vegetable oil extended Emulsion Styrene Butadiene Rubber (E-SBR) grades (Prepared with Palmolein and Coconut oils) were showing comparable rheometric and stress-strain properties, high reinforcement index (around 5%), better rubber-filler interaction parameter (around 12%), better abrasion resistance (around 23%) and comparable tanδ value @0°, 30° and 60°C as compared to naphthenic oil extended SBR based compound.

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“…An antimicrobial agent is a natural or synthetic substance that can kill or inhibit the growth of microorganisms by disrupting the essential microbial metabolic pathway or changing the cell membrane or cell wall structure [ 19 ]. There are a wide variety of antimicrobial agents that have proven their antimicrobial activities in NR latex, such as chitin [ 20 ], mangosteen peel powder [ 21 , 22 ], zinc oxide nanoparticles [ 23 , 24 ], silver nanoparticles [ 25 ], vegetable oil emulsion [ 26 ], and povidone-iodine [ 27 ]. Each antimicrobial agent has its mechanism for suppressing the growth of pathogenic microorganisms.…”

Section: Introductionmentioning

confidence: 99%

Natural Rubber (NR) Latex Films with Antimicrobial Properties for Stethoscope Diaphragm Covers

Azura

2022

Materials

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Systematic disinfection of the stethoscope diaphragm is required to ensure that it does not act as a vector for cross-transmission of health-related diseases. Thus, an antimicrobial latex film could be used as a cover to inhibit pathogenic bacteria from growing on its surface. The aim of this work is to determine the antimicrobial activity and mechanical properties of antimicrobial natural rubber (NR) latex films with different types of antimicrobial agents (mangosteen peel powder (MPP), zinc oxide nanoparticles (ZnO NP), and povidone-iodine (PVP-I)). The antimicrobial loading was varied from 0.5, to 1.0, and 2.0 phr to monitor the effective inhibition of Gram-negative bacteria and fungi growth. For MPP and PVP-I antimicrobial agents, a loading of 2.0 phr showed good antimicrobial efficacy with the largest zone of inhibition. Simultaneously, ZnO NP demonstrated excellent antimicrobial activity at low concentrations. The addition of antimicrobial agents shows a comparable effect on the mechanical properties of NR latex films. In comparison to control NR latex film (29.41 MPa, 48.49 N/mm), antimicrobial-filled films have significantly greater tensile and tear strengths (MPP (33.84 MPa, 65.21 N/mm), ZnO NP (31.79 MPa, 52.77 N/mm), and PVP-I (33.25 MPa, 50.75 N/mm). In conclusion, the addition of antimicrobial agents, particularly ZnO NP, can be a better choice for NR latex films because they will serve as both an activator and an antimicrobial. In a clinical context, with regard to frequently used medical equipment such as a stethoscope, such an approach offers significant promise to aid infection control.

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Physicochemical and antimicrobial properties of natural rubber latex films in the presence of vegetable oil microemulsions

Cited by 10 publications

References 40 publications

Fortification of chocolate usingMoringa oleiferaextract encapsulated in microemulsions

Fortification of chocolate usingMoringa oleiferaextract encapsulated in microemulsions

Use of vegetable oils as an alternate to naphthenic oil for extension of emulsion styrene butadiene rubber

Natural Rubber (NR) Latex Films with Antimicrobial Properties for Stethoscope Diaphragm Covers

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