| Autor: |
Yvonne Tze Qzian Ling, Siang Yee Lee, Kok Whye Cheong, Shiek Lin Tay, Seng Tat Tan, Yi Xin Heng |
| Předmět: |
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| Zdroj: |
AIP Conference Proceedings; 2018, Vol. 1985 Issue 1, p1-6, 6p |
| Abstrakt: |
Petroleum-based mineral oils are commonly used as softeners in latex compounding. They are often added as emulsions. The main aim of this research is to formulate environmental friendly vegetable oil nanoemulsion and investigate the swelling effect of this emulsion in different natural rubber (NR) latexes. Vegetable oil nanoemulsion with nano-sized of 11.4 nm (NE) was produced from the blend of coconut kernel oil (CKO) and soybean oil (SBO) in a ratio of 7:3 using phase inversion temperature (PIT) method. A macro-sized CKO/SBO emulsion (ME) of 744.9 nm was also formulated by homogenization method. These emulsions were then subjected to blend with various latexes, including natural rubber (NR), epoxidized natural rubber (ENR) with epoxidation level of 25% (ENR-25) and 50% (ENR-50). It was found that about 3.0 phr of CKO/SBO NE has swollen NR latexes more extensively compared to ENR latexes, evidenced by an increase in particle sizes in the increasing order of ENR-50 < ENR-25 < NR. This increasing trend is equivalent to the percentage increase recorded about 134 %, 161 % and 660 % for ENR-50, ENR-25 and NR respectively. The study of oil content effect revealed that 6 phr of NE has a better swelling effect than that of 3 phr on all the latex particle sizes. In a further study on the effect of storage temperature, all latex particles stored at 50 ± 3°C was able to swell up larger than those stored at room temperature (25 ± 3°C). A drastic increase in latex particle size was observed for NR-NE(3) stored at 50 ± 3°C with a size recorded at 2165.7 nm. Taken together, CKO/SBO nanoemulsion has a potential to serve as a green softener in latex compounding. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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