Pengaruh Konsentrasi Asam Stearat dan Suhu Gelatinisasi terhadap Karakteristik Komposit Bioplastik Tapioka dan Glukomanan

JURNAL REKAYASA DAN MANAJEMEN AGROINDUSTRI Pub Date : 2022-03-28 DOI:10.24843/jrma.2022.v10.i01.p05

Jhon Berry Finn Damanik, Bambang Admadi Harsujuwono, Lutfi Suhendra

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Abstract

This study aims to determine the effect of stearic acid concentration and gelatinization temperature and the interaction of the two treatments on the characteristics of tapioca and glucomannan bioplastic composites, and determine the concentration of stearic acid and gelatinization temperature which can produce bioplastic composites with the best characteristics. This study used a randomized block design with two factors. The first factor is the concentration of stearic acid which consists of 0.2%, 0.4%, 0.6%, 0.8%. The second factor is the gelatinization temperature which consists of 4 temperatures, namely 70±1°C, 75±1°C, 80±1°C, 85±1°C. The variables observed in this study were tensile strength, elongation at break, elasticity, thickness expansion, water vapor transmission rate, biodegradation and functional group analysis. The data were analyzed for diversity and continued with Duncan's Multiple Comparison. The results showed that the concentration of stearic acid and gelatinization temperature had a very significant effect on tensile strength, thickness expansion, water vapor transmission rate and biodegradation. The interaction between treatments had a very significant effect on tensile strength, thickness expansion, water vapor transmission rate and biodegradation and significantly affected elongation at break and elasticity. The best tapioca and glucomannan bioplastic composites used a stearic acid concentration of 0.4% and a gelatinization temperature of 80±1°C which had the characteristics of a tensile strength of 23.86 MPa, elongation at break 8.70%, elasticity 274.40 MPa, thickness expansion 111.52%, water vapour transmission rate 1.05 g/m2.hour, biodegradation rate with 7 days old. Tapioca and glucomannan bioplastic composites contain functional groups of hydroxyl (O-H), alkyne (C?H), aldehyde (C=O), carboxylic acid (C-O), alkene (C-H) and hydroxyl hydrocarbon (CH2)n. Keywords : bioplastic composite, tapioca, glucomannan, stearic acid, gelatinization temperature

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草甘膦酸浓度和凝胶化温度对木薯淀粉和胶粘剂复合材料的特性的影响

本研究旨在确定硬脂酸浓度和糊化温度以及两者的交互作用对木薯淀粉和葡甘露聚糖复合生物塑料特性的影响，并确定硬脂酸浓度和糊化温度可以制备出具有最佳特性的生物塑料复合材料。本研究采用双因素随机区组设计。第一个因素是硬脂酸的浓度，由0.2%、0.4%、0.6%、0.8%组成。第二个因素是糊化温度，由4个温度组成，即70±1℃、75±1℃、80±1℃、85±1℃。本研究观察到的变量包括拉伸强度、断裂伸长率、弹性、厚度膨胀、水蒸气透过率、生物降解和官能团分析。对数据进行多样性分析，并继续进行邓肯多重比较。结果表明，硬脂酸浓度和糊化温度对其拉伸强度、厚度膨胀率、水蒸气透过率和生物降解率均有非常显著的影响。处理间的交互作用对拉伸强度、厚度膨胀、水蒸气透过率和生物降解有显著影响，对断裂伸长率和弹性伸长率有显著影响。当硬脂酸浓度为0.4%，糊化温度为80±1℃时，最佳的木薯淀粉-葡甘露聚糖生物塑料复合材料的抗拉强度为23.86 MPa，断裂伸长率为8.70%，弹性为274.40 MPa，厚度膨胀率为111.52%，水蒸气透过率为1.05 g/m2。小时，7日龄生物降解率。木薯淀粉和葡甘露聚糖生物塑料复合材料含有羟基(O-H)、炔(C?H)、醛(C=O)、羧酸(C-O)、烯烃(C-H)和羟基烃(CH2)n。关键词:生物塑料复合材料，木薯粉，葡甘露聚糖，硬脂酸，糊化温度

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JURNAL REKAYASA DAN MANAJEMEN AGROINDUSTRI

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