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Abstract
A new kind of long-chain aliphatic polyamide (PA1218) with a relatively low melting point, high molecular weight, and stable mechanical properties at humid conditions was successfully developed via a polycondensation reaction between 1,18-octadecanedioic acid and 1,12-diaminodecane. Additionally, oleic acid-surfaced modified silicon dioxide (SSD) was prepared and employed to improve the properties of PA1218 through in-situ polymerization. FT-IR spectra and TGA thermograms confirmed the successful surface modification of nanoparticles, and consequently, 5% substitution of surface hydroxyl groups of SiO2 nanoparticles with oleic acid molecules. Moreover, the thermomechanical and rheology tests revealed a significant improvement in nanocomposites’ properties compared to the pure PA1218; for instance, the tensile strength and storage modulus were increased by 22% and 40%, respectively in the sample containing 3% SSD nanoparticles. This improvement, along with SEM images, confirmed the uniform dispersion of SSD nanoparticles through the employed in-situ polymerization and excellent compatibility between inorganic and organic phases, which was achieved via surface modification. Finally, all the samples demonstrated a water uptake capacity of less than 0.6% attributed to the high methylene/amide ratio in their backbones, causing these newly developed nanocomposites to be notable candidates for specific engineering applications.
Original language | English |
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Article number | 100450 |
Number of pages | 10 |
Journal | Materials Today Chemistry |
Volume | 20 |
Early online date | 13 Mar 2021 |
DOIs | |
Publication status | Published - Jun 2021 |
MoE publication type | A1 Journal article-refereed |
Keywords
- Long-chain aliphatic polyamide
- surface modification
- Silicon dioxide
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Dive into the research topics of 'Novel long-chain aliphatic polyamide/surface-modified silicon dioxide nanocomposites: in-situ polymerization and properties'. Together they form a unique fingerprint.Projects
- 2 Finished
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BIOECONOMY: BIOECONOMY Alliance for excellence in sustainable biomass refining
Seppälä, J. (Principal investigator)
01/01/2020 → 31/12/2023
Project: RCF Research Infrastructure
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VALUEBIOMAT: Bio-oils based polymeric composites; value chain from syntheisis to additive manufacturing
Seppälä, J. (Principal investigator)
01/06/2019 → 28/02/2023
Project: Academy of Finland: Strategic research funding