Open AccessEffects of Water on Hydrophobization and Mechanical Properties of Thermoplastic Agar
Author(s) -
Agusman Agusman,
Dina Fransiska,
Nurhayati Nurhayati,
Hari Eko Irianto,
P Priambudi,
Azween Abdullah,
Rossy Choerun Nissa,
Putri Putih Puspa Asri,
Nanang Masruchin,
Bakti Berlyanto Sedayu,
Arif Rahman Hakim,
Putri Wullandari,
Wahyu Tri Handoyo
Publication year - 2021
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.179
H-Index - 26
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/715/1/012057
Subject(s) - bioplastic , water content , materials science , ultimate tensile strength , extrusion , thermoplastic , elongation , composite material , glycerol , plastics extrusion , agar , moisture , plasticizer , absorption of water , contact angle , chemical engineering , chemistry , waste management , organic chemistry , genetics , geotechnical engineering , biology , bacteria , engineering
Thermoplastic agar (TPA) was prepared by a melt extrusion process and the effects of water contents on the material properties of these foams were investigated. Bioplastics were produced by mixing agar, glycerol, and water at ratio agar; glycerol: water was 5:3:2; 5:3:3; and 5:3:4 through the melting process at 120 °C and 18 rpm. The addition of water affected the extrusion process more easily, so the pellet could move easily from the extruder, but the moisture content of TPA increased with water addition. Then, TGA analysis showed no difference in decreasing mass in the sample with water addition. Permeability, elongation, contact angle, density, moisture content, and WVTR of bioplastics increased with water addition. The FTIR curves indicated that the interaction between water and agar may form much more hydrogen bonds. The best treatment was bioplastics with agar:glycerol:water=5:3:2, which have characteristics: tensile strength 16.19 MPa, elongation at break 102.56%, moisture content %, contact angle 72.81°, density 1.38 g/ml, moisture content 3.09%, transparency value 0.067, and WVTR 1334.59 g/m2.24 h.