Gelcasting of alumina via cross-linking of a polyelectrolyte dispersant

Yuju Lu; Ke Gan; Jingjing Liu; Bo Ren; Xiaoyan Zhang; Yedong Rong; Jie Xu; Jin Long Yang

doi:10.1016/j.ceramint.2019.12.061

Gelcasting of alumina via cross-linking of a polyelectrolyte dispersant

Yuju Lu, Ke Gan, Jingjing Liu, Bo Ren, Xiaoyan Zhang, Yedong Rong, Jie Xu, Jin Long Yang

School of Materials Sience and Engineering

Tsinghua University

Research output: Contribution to journal › Article › peer-review

10 Scopus citations

Abstract

A new gelcasting approach of alumina inspired by Isobam was designed utilizing a polyelectrolyte dispersant named BTT, which is able to form cross-links via thiol-ene reaction with pentaerythritol tetrakis(2-mercaptoacetate). Measurement of zeta potential and viscosity shows good dispersion ability of BTT in 52 vol% alumina suspensions. The flow curves and shear modulus of wet green bodies during gelation demonstrate its high gelation strength in comparison with Isobam. The analysis of effects of addition of ammonium citrate tribasic into the system indicates that a polymer-particle double network is supposed to form during gelation. Elastic part and viscous part of gelation strength of the system are mainly dominated by interaction between polyelectrolyte and particles and cross-linking respectively, which accounts for the existence of both high gelation strength and flexibility of wet green bodies fabricated in this approach.

Original language	English
Pages (from-to)	8308-8313
Number of pages	6
Journal	Ceramics International
Volume	46
Issue number	6
DOIs	https://doi.org/10.1016/j.ceramint.2019.12.061
State	Published - 15 Apr 2020

Keywords

Alumina suspension
Cross-linking
gelcasting
Polyelectrolyte dispersant
Polymer-particle double network

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10.1016/j.ceramint.2019.12.061

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title = "Gelcasting of alumina via cross-linking of a polyelectrolyte dispersant",

abstract = "A new gelcasting approach of alumina inspired by Isobam was designed utilizing a polyelectrolyte dispersant named BTT, which is able to form cross-links via thiol-ene reaction with pentaerythritol tetrakis(2-mercaptoacetate). Measurement of zeta potential and viscosity shows good dispersion ability of BTT in 52 vol% alumina suspensions. The flow curves and shear modulus of wet green bodies during gelation demonstrate its high gelation strength in comparison with Isobam. The analysis of effects of addition of ammonium citrate tribasic into the system indicates that a polymer-particle double network is supposed to form during gelation. Elastic part and viscous part of gelation strength of the system are mainly dominated by interaction between polyelectrolyte and particles and cross-linking respectively, which accounts for the existence of both high gelation strength and flexibility of wet green bodies fabricated in this approach.",

keywords = "Alumina suspension, Cross-linking, gelcasting, Polyelectrolyte dispersant, Polymer-particle double network",

author = "Yuju Lu and Ke Gan and Jingjing Liu and Bo Ren and Xiaoyan Zhang and Yedong Rong and Jie Xu and Yang, {Jin Long}",

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year = "2020",

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doi = "10.1016/j.ceramint.2019.12.061",

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T1 - Gelcasting of alumina via cross-linking of a polyelectrolyte dispersant

AU - Lu, Yuju

AU - Gan, Ke

AU - Liu, Jingjing

AU - Ren, Bo

AU - Zhang, Xiaoyan

AU - Rong, Yedong

AU - Xu, Jie

AU - Yang, Jin Long

PY - 2020/4/15

Y1 - 2020/4/15

N2 - A new gelcasting approach of alumina inspired by Isobam was designed utilizing a polyelectrolyte dispersant named BTT, which is able to form cross-links via thiol-ene reaction with pentaerythritol tetrakis(2-mercaptoacetate). Measurement of zeta potential and viscosity shows good dispersion ability of BTT in 52 vol% alumina suspensions. The flow curves and shear modulus of wet green bodies during gelation demonstrate its high gelation strength in comparison with Isobam. The analysis of effects of addition of ammonium citrate tribasic into the system indicates that a polymer-particle double network is supposed to form during gelation. Elastic part and viscous part of gelation strength of the system are mainly dominated by interaction between polyelectrolyte and particles and cross-linking respectively, which accounts for the existence of both high gelation strength and flexibility of wet green bodies fabricated in this approach.

AB - A new gelcasting approach of alumina inspired by Isobam was designed utilizing a polyelectrolyte dispersant named BTT, which is able to form cross-links via thiol-ene reaction with pentaerythritol tetrakis(2-mercaptoacetate). Measurement of zeta potential and viscosity shows good dispersion ability of BTT in 52 vol% alumina suspensions. The flow curves and shear modulus of wet green bodies during gelation demonstrate its high gelation strength in comparison with Isobam. The analysis of effects of addition of ammonium citrate tribasic into the system indicates that a polymer-particle double network is supposed to form during gelation. Elastic part and viscous part of gelation strength of the system are mainly dominated by interaction between polyelectrolyte and particles and cross-linking respectively, which accounts for the existence of both high gelation strength and flexibility of wet green bodies fabricated in this approach.

KW - Alumina suspension

KW - Cross-linking

KW - gelcasting

KW - Polyelectrolyte dispersant

KW - Polymer-particle double network

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U2 - 10.1016/j.ceramint.2019.12.061

DO - 10.1016/j.ceramint.2019.12.061

M3 - 文章

AN - SCOPUS:85076836158

SN - 0272-8842

VL - 46

SP - 8308

EP - 8313

JO - Ceramics International

JF - Ceramics International

IS - 6

ER -

Gelcasting of alumina via cross-linking of a polyelectrolyte dispersant

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Keywords

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