Preparation of Poly (methacrylic acid-co-N-(hydroxymethyl)acrylamide)-Grafted deproteinized natural rubber : effects of solid content on chemical and physical properties

Name: Pichaya Rumjuan

Organization : Suranaree University of Technology. Institute of Engineering

Name: Wachirabhorn Pongputthipat

Organization : Suranaree University of Technology. Institute of Engineering

Name: Pranee Chumsamrong

Organization : Suranaree University of Technology. Institute of Engineering

Name: Chaiwat Ruksakulpiwat

Organization : Suranaree University of Technology. Institute of Engineering

Email : charuk@sut.ac.th

Name: Yupaporn Ruksakulpiwat

Organization : Suranaree University of Technology. Institute of Engineering

Email : yupa@sut.ac.th

keyword: Shear thickening fluids

LCSH: Non-Newtonian fluids

; Silica nanoparticles

LCSH: Nanocomposites (Materials)

; Nanocellulose

Abstract: The shear thickening fluid (STF) is a non-Newtonian fluid that transitions from shear thinning to shear thickening, resembling solid-like behavior when subjected to a critical shear rate. This research focused on developing nano silica-based shear thickening fluid (STF) and investigating the effects of silica content, media, and the addition of nanocellulose (NC) on its rheological behavior. The optimum formulation of STFs with low critical shear rate and high viscosity was determined using a parallel plate rheometer. The results showed that the fluid prepared from nano silica in PEG with a molar mass of 200 (PEG200) with the addition of nano silica at least 25% wt showed the shear thickening behavior. As the amount of nano silica increased from 25% wt to 40% wt, the peak viscosity enhanced from 10.7 Pa·s to 333.3 Pa·s, and the critical shear rate decreased from 316.3 1/s to 31.6 1/s. The critical shear rate was reduced when using PEG with higher molar mass (PEG400) as media instead of PEG200, but it increased when using glycerol. The addition of NC in STFs could enhance the sensitivity of STFs to the applied loads. The critical shear rate of the NC-modified STF was lower than that of unmodified STFs. This result could be explained by the H-bonding interaction of NC and silica, which led to the readily silica hydrocluster that reduced the critical shear rate

King Mongkut's University of Technology North Bangkok. Central Library

Address: BANGKOK

Email: library@kmutnb.ac.th

Created: 2025

Modified: 2025-10-29

Issued: 2025-10-29

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BibliograpyCitation : In The Chemical Society of Thailand under the Patronage of Professor Dr. Her Royal Highness Princess Chulabhorn Krom Phra Srisavangavadhana and Suranaree University of Technology. Institute of Science. School of Chemistry. Pure and Applied Chemistry International Conference 2025 (PACCON 2025) (pp.705-712). Bangkok : The Chemical Society of Thailand under the Patronage of Professor Dr. Her Royal Highness Princess Chulabhorn Krom Phra Srisavangavadhana in association with the School of Chemistry, Institute of Science, Suranaree University of Technology, 2025

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