Preparation and properties of waterborne polyurethane modified by aminoethylaminopropyl polydimethylsiloxane for fluorine-free water repellents

Zhang, Wenguo; Zou, Xiaobin; Liu, Xiaoli; Zhu, Liang; Zhang, Ge; Luo, Yunjun

doi:10.1016/j.porgcoat.2019.105407

Cited by 28 publications

(23 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Nevertheless, excessive emulsifying units went against polyurethane microphase separation structure and expose the disadvantages of the mechanical strength of waterborne polyurethane. [47,48] And the result has been speculated that moderate amount of catechol structure was advantageous to build homogeneous and compact crosslinking network in the system. While excessive catechol structure bring from emulsifier DBA can form gathering between polyurethane molecular through overmuch noncovalent forces such as hydrogen bonding, cationic-𝜋 bonding, and 𝜋-𝜋 stacking, causing polyurethane molecules difficult to form tight and uniform crosslinking network, thus energy dissipation was blocked and affecting its mechanical performance when acted upon by external forces.…”

Section: Properties Of Cwpu Filmsmentioning

confidence: 99%

Robust Catechol Containing Cationic Waterborne Polyurethanes with Antibacterial, UV Protective, and Adhesive Properties

Zhao

Pang

et al. 2022

Macro Materials & Eng

View full text Add to dashboard Cite

Functional cationic waterborne polyurethanes (CWPUs) with environmental friendliness and excellent mechanical properties are widely desired in the materials industry. However, traditional modification methods such as molecular structure adjustment, crosslinking modification, and physical filling for polyurethane are overly complex and do not typically improve mechanical properties to the point of satisfying the stringent requirements for modern industrial materials. In this study, phenolic acid 3,4-dihydroxybenzoic acid with a catechol structure is applied to neutralize the tertiary ammonium structure on the side chain of polyurethane for the facile preparation of CWPU materials. The effects of this neutralizer on the microstructure, mechanical properties, and functional performance of CWPU samples (e.g., antibacterial, ultraviolet protection, coating properties) are systematically investigated. The results indicate that the catechol structures of the neutralizer provide abundant hydrogen bonding reaction sites, which greatly improves the mechanical properties of the CWPU films with the maximum strength of 43 MPa and simultaneously 1241% elongation at break. Furthermore, catechol structure and cationic attribute endow the CWPUs with excellent adhesion to various substrates, strong ultraviolet protection performance, and antibacterial ability. The proposed approach can be used to prepare robust CWPUs with strong functional performance as highly effective, environmental-friendly materials over a large scale.

show abstract

Section: Properties Of Cwpu Filmsmentioning

confidence: 99%

Robust Catechol Containing Cationic Waterborne Polyurethanes with Antibacterial, UV Protective, and Adhesive Properties

Zhao

Pang

et al. 2022

Macro Materials & Eng

View full text Add to dashboard Cite

show abstract

“…Na Figura 1, pode-se fazer a identificação das bandas obtidas por meio do FTIR realizado com o hidrorrepelente de massa. A banda localizada em 2.966 cm -1 deve-se à vibração de alongamento de -CH3, indicando que o hidrorrepelente em questão tem uma estrutura de silicone contendo o grupo funcional metil (CAMPOS, 2012;ZHANG et al, 2020). Em 2.168 cm -1 está presente uma banda forte ocasionada pela presença de Si-H (PAVIA et al, 2010).…”

Section: Hidrorrepelente De Massaunclassified

“…Em 769, 1.261 e 1.405 cm -1 ocorre a vibração assimétrica no plano de CH3 e a vibração de alongamento do Si-C, a vibração de deformação simétrica de Si-CH3 ou Si-(CH3)2 e a vibração de flexão de CH em Si-CH3 respectivamente (LI et al, 2021). O pico presente em 837 cm -1 é referente à vibração de flexão do Si-H. Já a banda de absorção característica do Si-O apareceu em torno de 1.099 cm -1 (PAVIA et al, 2010;SILVA, 2019;ZHANG et al, 2020). As bandas identificadas indicam que o hidrorrepelente de massa contém silano/siloxano.…”

Section: Hidrorrepelente De Massaunclassified

Efeitos do envelhecimento acelerado sobre o gesso beta com a adição de hidrorrepelente de massa

2022

View full text Add to dashboard Cite

Resumo Este trabalho tem como objetivo avaliar a durabilidade do gesso com a adição de hidrorrepelente quando submetido ao envelhecimento acelerado. Para isso foram utilizados gesso e hidrorrepelente de massa. Foi fixada a relação água/gesso em 0,7 e utilizados os teores de 0,2% e 0,4% de hidrorrepelente em relação à massa de gesso. O gesso de referência (sem hidrorrepelente) e o gesso contendo hidrorrepelente de massa foram avaliados na idade “zero” e após 10 e 20 ciclos de secagem e molhagem. Foram realizados ensaios de dureza, resistência à compressão, absorção por imersão total, absorção por capilaridade e análise de MEV e EDS. Aos 20 ciclos de envelhecimento acelerado, houve redução das propriedades mecânicas; em contrapartida, manteve-se uma redução considerável, tanto da absorção por imersão, quanto da absorção por capilaridade nos corpos de prova contendo o hidrorrepelente em comparação aos corpos de prova de referência. Em relação à microestrutura, mesmo aos 20 ciclos, foi possível identificar a presença do hidrorrepelente formando um “filme” sobre os cristais de gesso, tendo sido identificado um percentual maior do hidrorrepelente na região mais superficial do corpo de prova. Tais resultados mostram a eficácia do hidrorrepelente como barreira de proteção diante do envelhecimento acelerado.

show abstract

“…A series of modification methods have been applied to improve the properties of waterborne polyurethanes. ,− Silicone is an excellent raw material used to modify polyurethane materials due to its outstanding characteristics, such as water repellency, low surface energy, anti-abrasion, and antioxidation. − As an example of organosilicon modification, Ge and Luo et al used polysiloxane (PDMS), toluene diisocyanate (TDI), and aminoethylaminopropyl polydimethylsiloxane (AEAPS) as raw materials to synthesize available hydrophobic water-based polyurethane for textile coatings . However, the mechanical properties of waterborne polyurethane cannot be improved by only modification with organosiloxane. − Different compounds can be added to work with organosiloxane to solve the abovementioned problem.…”

Section: Introductionmentioning

confidence: 99%

Self-Healing and Reprocessable Terpene Polysiloxane-Based Poly(thiourethane-urethane) Material with Reversible Thiourethane Bonds

et al. 2023

View full text Add to dashboard Cite

Polyurethane materials will come into contact with different solvents in daily life, and at the same time, they will be subject to different degrees of collision, wear and tear. Failure to take corresponding preventative or reparative measures will result in a waste of resources and an increase in costs. To this end, we prepared a novel polysiloxane with isobornyl acrylate and thiol groups as side groups, which was further used in the preparation of poly(thiourethane-urethane) materials. Thiourethane bonds generated by the click reaction of thiol groups with isocyanates endow poly(thiourethane-urethane) materials with the ability to heal and reprocess. Isobornyl acrylate with a large sterically hindered rigid ring promotes segment migration, accelerating the exchange of thiourethane bonds, which is beneficial to the recycling of materials. These results not only promote the development of terpene derivative-based polysiloxanes but also show the great potential of thiourethane as a dynamic covalent bond in the field of polymer reprocessing and healing.

show abstract

Preparation and properties of waterborne polyurethane modified by aminoethylaminopropyl polydimethylsiloxane for fluorine-free water repellents

Cited by 28 publications

References 25 publications

Robust Catechol Containing Cationic Waterborne Polyurethanes with Antibacterial, UV Protective, and Adhesive Properties

Robust Catechol Containing Cationic Waterborne Polyurethanes with Antibacterial, UV Protective, and Adhesive Properties

Efeitos do envelhecimento acelerado sobre o gesso beta com a adição de hidrorrepelente de massa

Self-Healing and Reprocessable Terpene Polysiloxane-Based Poly(thiourethane-urethane) Material with Reversible Thiourethane Bonds

Contact Info

Product

Resources

About