Cargando…
Design, Preparation and Properties of Polyurethane Dispersions via Prepolymer Method
A waterborne polyurethane dispersion for foamed synthetic leather base was designed and prepared using prepolymer method. There are many variables in the emulsification and chain-extension process of waterborne polyurethane (WPUR) dispersions prepared by prepolymer method. This work thoroughly evalu...
Autores principales: | , |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2023
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9863305/ https://www.ncbi.nlm.nih.gov/pubmed/36677682 http://dx.doi.org/10.3390/molecules28020625 |
_version_ | 1784875300921802752 |
---|---|
author | Sun, Lijuan Jiang, Hongmei |
author_facet | Sun, Lijuan Jiang, Hongmei |
author_sort | Sun, Lijuan |
collection | PubMed |
description | A waterborne polyurethane dispersion for foamed synthetic leather base was designed and prepared using prepolymer method. There are many variables in the emulsification and chain-extension process of waterborne polyurethane (WPUR) dispersions prepared by prepolymer method. This work thoroughly evaluated the impacts of the steps of adding emulsified water, the temperature of the prepolymer and emulsified water, and concentration of ammonia water on WPUR dispersions by investigating the particle sizes/distributions and the mechanical stability. Changes in the temperature of the prepolymer and emulsified water, the concentration of ammonia water, and the step of adding emulsified water showed great impacts on the appearance and particle size of dispersions. Decreasing the temperature of the prepolymer and emulsified water and increasing the dilution ration of H(2)O to ethylenediamine (EDA) led to safe emulsification and dispersions with good appearance and narrow particle size distributions can be prepared. Surprising results were obtained by adding emulsified water in two steps, WPUR dispersions with a small particle size, narrow particle distribution and excellent tensile properties can be obtained. The optimized WPUR1 was applied to prepare water-based synthetic leather base after mechanical foaming, and the base presented the desired high performance, such as high folding resistance and peel strength. |
format | Online Article Text |
id | pubmed-9863305 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2023 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-98633052023-01-22 Design, Preparation and Properties of Polyurethane Dispersions via Prepolymer Method Sun, Lijuan Jiang, Hongmei Molecules Article A waterborne polyurethane dispersion for foamed synthetic leather base was designed and prepared using prepolymer method. There are many variables in the emulsification and chain-extension process of waterborne polyurethane (WPUR) dispersions prepared by prepolymer method. This work thoroughly evaluated the impacts of the steps of adding emulsified water, the temperature of the prepolymer and emulsified water, and concentration of ammonia water on WPUR dispersions by investigating the particle sizes/distributions and the mechanical stability. Changes in the temperature of the prepolymer and emulsified water, the concentration of ammonia water, and the step of adding emulsified water showed great impacts on the appearance and particle size of dispersions. Decreasing the temperature of the prepolymer and emulsified water and increasing the dilution ration of H(2)O to ethylenediamine (EDA) led to safe emulsification and dispersions with good appearance and narrow particle size distributions can be prepared. Surprising results were obtained by adding emulsified water in two steps, WPUR dispersions with a small particle size, narrow particle distribution and excellent tensile properties can be obtained. The optimized WPUR1 was applied to prepare water-based synthetic leather base after mechanical foaming, and the base presented the desired high performance, such as high folding resistance and peel strength. MDPI 2023-01-07 /pmc/articles/PMC9863305/ /pubmed/36677682 http://dx.doi.org/10.3390/molecules28020625 Text en © 2023 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Sun, Lijuan Jiang, Hongmei Design, Preparation and Properties of Polyurethane Dispersions via Prepolymer Method |
title | Design, Preparation and Properties of Polyurethane Dispersions via Prepolymer Method |
title_full | Design, Preparation and Properties of Polyurethane Dispersions via Prepolymer Method |
title_fullStr | Design, Preparation and Properties of Polyurethane Dispersions via Prepolymer Method |
title_full_unstemmed | Design, Preparation and Properties of Polyurethane Dispersions via Prepolymer Method |
title_short | Design, Preparation and Properties of Polyurethane Dispersions via Prepolymer Method |
title_sort | design, preparation and properties of polyurethane dispersions via prepolymer method |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9863305/ https://www.ncbi.nlm.nih.gov/pubmed/36677682 http://dx.doi.org/10.3390/molecules28020625 |
work_keys_str_mv | AT sunlijuan designpreparationandpropertiesofpolyurethanedispersionsviaprepolymermethod AT jianghongmei designpreparationandpropertiesofpolyurethanedispersionsviaprepolymermethod |