การเตรียมและการทดสอบสมบัติของคอมโพสิตของพอลิ (เมทิล เมทาคริเลต-โค-บ ิวทิล เมทาคริเลต) แบบมีร่างแห และผงเปลือก ลำไยที่ถูกดัดแปร สำหรับใช้เป็นวัสดุดูดซับน้ำมันและตัวทำละลายอินทรีย์
This study is focused on the preparation and property testing of composites of crosslinked poly(methyl methacrylate-co-butyl methacrylate) and modified longan shell powder (LSP) for use as oil and organic solvent absorbents which they contain amount of modified longan shell powder 2, 4, 6 and 8...
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| Format: | Theses and Dissertations |
| Language: | other |
| Published: |
เชียงใหม่ : บัณฑิตวิทยาลัย มหาวิทยาลัยเชียงใหม่
2020
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| Online Access: | http://cmuir.cmu.ac.th/jspui/handle/6653943832/69626 |
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| Institution: | Chiang Mai University |
| Language: | other |
| Summary: | This study is focused on the preparation and property testing of composites of crosslinked
poly(methyl methacrylate-co-butyl methacrylate) and modified longan shell powder (LSP) for use
as oil and organic solvent absorbents which they contain amount of modified longan shell powder 2,
4, 6 and 8 percentage. The composites were synthesized by free radical polymerization from methyl
methacrylate and butyl methacrylate using benzoyl peroxide as initiator and polyethylene glycol
diacrylate as crosslinker. The success of modification of LSP and the synthesis was confirmed by
thermogravimetric analysis (TGA), Fourier transform infrared spectroscopy (FTIR) and scanning
electron spectroscopy (SEM). The average percentages grafting determined by gravimetric method,
TGA and FTIR were 30.08, 26.13 and 22.31 respectively. The prepared composites were brown
and darker when increasing LSP content. The conversion percentage of composites is in the range
of 95 to 98. The composites show higher thermal stability as increasing LSP content. After grafting,
composites have more compatibility with LSP, observed by SEM. Water contact angle of
composites is in the range of 55 to 75 degree. In this research, 4 organic solvents and 3 oils were
used to study the absorption ability of the composites. It was found that the prepared composites
show high absorption capacity in toluene in the range of 2.73 to 3.82 g/g and low absorption
capacity in hexane water and oil (<0.5 g/g). The absorption kinetic model showed that absorption followed the pseudo-second order equation. It was found that chemisorption occurs. For the
reusability of the composites, the results show that they can be used up to 10 times. Moreover, the
absorption capacity of ethyl acetate that can be enhanced by adding the porogen, in this case
deionized water. In conclusion, it can utilize LSP which is an agriculture waste for use as organic
solvent absorbent. Moreover, modifications of LSP by grafting and alkalization can improve the
adsorption rate of the composites. |
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