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Pimpaka Chanchettanadi. Preparation and characterization of chitosan-activated carbon-poly(vinyl alcohol) composite films for controlled release of naphthalne-1-yl-acetic acid. Master's Degree(Engineering Technology). Thammasat University. Thammasat University Library. : Thammasat University, 2020.
Preparation and characterization of chitosan-activated carbon-poly(vinyl alcohol) composite films for controlled release of naphthalne-1-yl-acetic acid
องค์ประกอบของคอมโพสิตฟิล์มโดยใช้ถ่านกัมมันต์ เพื่อควบคุมการดูดซับและการชะลอการปลดปล่อยของฮอร์โมนพืช
Name: Pimpaka Chanchettanadi
keyword:
Chitosan
Abstract:
Food security is a current global problem. Therefore, plant growth regulators have been introduced to maintain availability of sufficient food quantity with appropriate quality. Naphthalen-1-yl-acetic acid or 1-naphthylacetic acid (1-NAA) is widely used as a plant growth regulator. However, high concentration of 1-NAA inhibits plant growth, contaminates in environment, and affects human health. Here, we report a novel chitosan (CS)-activated carbon (AC)-poly(vinyl alcohol) composite film for controlled release of 1-NAA. It was found that neutralization by diluting ethanol solution for four cycles promoted 1-NAA absorption. This was because it could largely promote the presence of ammonium form (NH3+) in CS structure. XPS results showed that as AC/CS ratios in the composite films increased, the -NH3+/NH ratios decreased corresponding to the reduction of CS content in the films. Performance of the developed composite film was evaluated using 1-NAA absorption and release studies. It showed that the film with AC/CS ratio at 24:16 exhibited maximum 1-NAA absorption capacity (11.82±0.35 mg g-1) and it also could effectively slow release of 1-NAA in water and reached 18.80% after 30 days. Although the developed composite film could absorb 1-NAA lower than pure chitosan film by 1.3 times, it could slower release of 1-NAA than that of the pure chitosan film by ~3 times. This was caused by the presence of both electrostatic and ππ interactions for 1-NAA attraction in the composite film structure
Thammasat University. Thammasat University Library
Address:
BANGKOK
Email:
preserv@tu.ac.th
Name: Pakorn Opaprakasit
Role:
advisor
Name: Egashira, Ryuichi
Role:
co-advisor
Created:
2020
Modified:
2022-11-07
Issued:
2022-11-07
วิทยานิพนธ์/Thesis
application/pdf
eng
DegreeName: Master of Engineering
Level: Master's Degree
Descipline: Engineering Technology
Grantor: Thammasat University
©copyrights Thammasat University
RightsAccess:
ใช้เวลา
0.024677 วินาที
Pimpaka Chanchettanadi
| Title | Contributor | Type |
|---|---|---|
| Preparation and characterization of chitosan-activated carbon-poly(vinyl alcohol) composite films for controlled release of naphthalne-1-yl-acetic acid
มหาวิทยาลัยธรรมศาสตร์ Pimpaka Chanchettanadi | Pakorn Opaprakasit Egashira, Ryuichi | วิทยานิพนธ์/Thesis |
Pakorn Opaprakasit
Egashira, Ryuichi
| Title | Creator | Type and Date Create |
|---|---|---|
| Preparation and characterization of chitosan-activated carbon-poly(vinyl alcohol) composite films for controlled release of naphthalne-1-yl-acetic acid
มหาวิทยาลัยธรรมศาสตร์ Pakorn Opaprakasit;Egashira, Ryuichi | Pimpaka Chanchettanadi | วิทยานิพนธ์/Thesis |
| Development of technique for determination of anti-scalant concentration in cooling water system
มหาวิทยาลัยธรรมศาสตร์ Paiboon Sreearunothai;Egashira, Ryuichi | Tikumporn Sudsakorn | วิทยานิพนธ์/Thesis |