Surface modification of polypropylene nonwoven fabrics by grafting of polydopamine

Chen, Shichang; Zhang, Lihao; Sun, Menghan; Zhang, Xianming; Chen, Wenxing

doi:10.1002/adv.22136

Cited by 13 publications

(9 citation statements)

References 34 publications

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“…The Θ W value decreased from 117.5° to 54.3°. Chen et al [ 44 ] observed a decrease in the Θ W value from 143.7° to 134.2° after modification of the PP nonwoven fabric in an aqueous solution of dopamine hydrochloride at a concentration of 2 g/L and buffered with TRIS (pH = 8.5) for 24 h at 60 °C and then the samples were washed four times with ultrasounds and dried in a vacuum at 60 °C. This indicates the exposure of hydroxyl and amine groups in polydopamine on the nonwoven surface, which causes the increase in the wettability.…”

Section: Resultsmentioning

confidence: 99%

Silver Nanowires and Silanes in Hybrid Functionalization of Aramid Fabrics

et al. 2022

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New functionalization methods of meta- and para-aramid fabrics with silver nanowires (AgNWs) and two silanes (3-aminopropyltriethoxysilane (APTES)) and diethoxydimethylsilane (DEDMS) were developed: a one-step method (mixture) with AgNWs dispersed in the silane mixture and a two-step method (layer-by-layer) in which the silanes mixture was applied to the previously deposited AgNWs layer. The fabrics were pre-treated in a low-pressure air radio frequency (RF) plasma and subsequently coated with polydopamine. The modified fabrics acquired hydrophobic properties (contact angle ΘW of 112–125°). The surface free energy for both modified fabrics was approximately 29 mJ/m2, while for reference, meta- and para-aramid fabrics have a free energy of 53 mJ/m2 and 40 mJ/m2, respectively. The electrical surface resistance (Rs) was on the order of 102 Ω and 104 Ω for the two-step and one-step method, respectively. The electrical volume resistance (Rv) for both modified fabrics was on the order of 102 Ω. After UV irradiation, the Rs did not change for the two-step method, and for the one-step method, it increased to the order of 1010 Ω. The specific strength values were higher by 71% and 63% for the meta-aramid fabric and by 102% and 110% for the para-aramid fabric for the two-step and one-step method, respectively, compared to the unmodified fabrics after UV radiation.

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Section: Resultsmentioning

confidence: 99%

Silver Nanowires and Silanes in Hybrid Functionalization of Aramid Fabrics

et al. 2022

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“…In other studies, PP surface was treated (oxidized) with alkali or acid and then chemically modified with DA by a simple dip coating [54][55][56]. In another approach, PP nonwoven fabrics were grafted with 3-isopropenyl-α,α ′ -dimethylbenzene isocyanate and covalent coupling between isocyanate and amine group of DA resulted in the modified surface [57]. In fact, the surface hydrophobicity was decreased after functionalization with DA [56].…”

Section: Strategies Of the Surface Engineering/ Modificationmentioning

confidence: 99%

Surface engineering of personal protective equipments (PPEs) to prevent the contagious infections of SARS-CoV-2

Pandey

2020

Surface Engineering

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The outermost surfaces of Personal Protective Equipments (PPEs) interact with virus surfaceprotein as the first step during its transmission from aerosols and contacting surfaces, which can be tuned by surface engineering/modification. This report highlights the role of engineered surface chemistry of PPEs to avoid the spreading of the novel SARS-CoV-2 virus in hospitals. Physical properties of surfaces and spike-glycoprotein are correlated with the reported stability of SARS-CoV-2. The spike-protein is reported to be hydrophobic in nature with an isoelectric point of 5.9. Hence surface with both positive charge and hydrophobic groups are expected to achieve a strong binding with the surface spike-protein. Various surface engineering strategies of polypropylene and other materials with hybrid selfassembled monolayers and dopamine are discussed to design the mixed hydrophobic and charged surfaces. The strong surface-protein interactions may lead to severe conformational changes and destabilization of the viral envelope, which can disintegrate and inactivate the novel coronavirus.

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“…In this sense, specific grafting molecules and/or with thin film deposition are applied onto PP non-woven fabrics, whose surfaces were activated by plasma and/ or silanol applications. [12][13][14][15][16] In the present work, a simply alternative to modify the hydrophobic character of PP non-woven fabrics by surface inclusion of mineral particles is explored. In this way, particles could absorb water making these fabrics more hydrophilic without use of plasma, liquid coating or chemical reaction.…”

Section: Introductionmentioning

confidence: 99%