Hydrophobic hybrid biopolymeric scaffolds based on chitosan : preparation, properties and applications

Name: Salita, Demeyer

LCSH: Burapha University -- Polymer Science Faculty of Sience

Classification :.DDC: 541.33

LCSH: Chitosan

LCSH: Biopolymers

LCSH: Surface chemistry

LCSH: Hydrophobic surfaces

Abstract: Water contamination by oil and organic solvents has been one of the major environmental concerns. To address this issue, superhydrophobic, low-cost and environmentally friendly materials are of great interest. Chitosan is a biopolymer possessing several useful properties, however, its poor stability and hydrophilic character severely hinders the use in practical applications. In this work, chitosan was chemically modified by a sol-gel process followed by a freeze-drying method, to strengthen the stability and obtain superhydrophobic scaffolds. Two organoalkoxysilanes, triethoxy(octyl)silane (TOS) and triethoxy(phenyl)silane (TPS) were engaged as hydrophobic modifiers in the presence of 3-(triehoxysilyl) propyl isocyanate (ICP) coupling agent. The crosslinked organic-inorganic hybrid scaffolds were three -dimensionally porous providing large surface area to facilitate the uptake of oils and organic solvents. Physicochemical and structural properties of the chitosan hybrid scaffolds were evaluated. ATR-FTIR, SEM-EDX, TGA analysis, pyrolysis and mechanical test confirmed the success of sol-gel synthesis in which the advantages of both organic and inorganic phases were combined. Water contact angle and adsorption test demonstrated that the CH/ICP/TPS70 was a superhydrophobic material and that the TPS concentration influenced in hydrophobicity. These hybrid scaffolds represented superior features including low bulk density (0.026 g/cm3 ), high porosity (70%), good compressive strength (two times its unmodified counterpart), superhydrophobicity (water contact angle of 159o ), and remarkable selectivity towards oil/water mixture. The hybrid scaffolds not only exhibited strong potential as an oil/water adsorbent with reusability but also showed an alternative route for environmentally friendly remediation of contaminated water.

Burapha University. Library

Address: CHONBURI

Email: buulibrary@buu.ac.th

Name: Thanida Trakulsujaritchok

Role: Principal advisor

Created: 2021

Modified: 2023-03-15

Issued: 2023-03-15

วิทยานิพนธ์/Thesis

application/pdf

CallNumber: Th 541.33 Sa165H

eng

DegreeName: Master of Science

Level: Master's Degree

Descipline: Polymer Science

Grantor: Burapha University

©copyrights Burapha University

ลำดับที่.	ชื่อแฟ้มข้อมูล	ขนาดแฟ้มข้อมูล	จำนวนเข้าถึง	วัน-เวลาเข้าถึงล่าสุด
1	61910010.pdf	2.27 MB

ใช้เวลา

0.028706 วินาที