Hybrid alginate‐copper sulfate textile coating for coronavirus inactivation

Abstract In the manufacture of Printed Wiring Boards (PWB), unwelcome structures, such as nodules and whiskers can be formed during copper electroplating with copper sulfate. Copper (Cu) whiskers with lengths of up to a few hundred micrometers can lead to electrical shorts between layers or patterns. In this paper, we document factors that can affect the growth of Cu whiskers; decomposition of additives in the Cu electroplating solution, surface stress, acidic cleaner, and the ingredients of a dry film. Contaminants from outside of the electroplating bath and the ingredients of the dry film were shown as key components in the formation of Cu whiskers.

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EFFECTS OF COPPER SULFATE TREATMENT ON EUTROPHIC URBAN LAKE PHYTOPLANKTON COMMUNITIES

Acta Hydrobiologica Sinica ◽

10.3724/sp.j.1035.2009.40596 ◽

2009 ◽

Vol 33 (4) ◽

pp. 596-602 ◽

Cited By ~ 3

Author(s):

Xiao-Li ZHAO ◽

Li-Rong SONG ◽

Xiao-Ming ZHANG

Keyword(s):

Copper Sulfate ◽

Urban Lake ◽

Phytoplankton Communities

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Rapid and Selective Acetalization of Aldehydes Using Anhydrous Copper Sulfate Supported on Silica Gel (CuSO4 / SiO2) Under Microwave Irradiation in Solvent-Free Conditions

Letters in Organic Chemistry ◽

10.2174/1570178053202900 ◽

2005 ◽

Vol 2 (2) ◽

pp. 151-155 ◽

Cited By ~ 5

Author(s):

Firouz Moghaddam ◽

Afsaneh Oskoui ◽

Hassan Boinee

Keyword(s):

Microwave Irradiation ◽

Silica Gel ◽

Copper Sulfate ◽

Solvent Free ◽

Solvent Free Conditions

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Penggunaan Limbah Logam Tembaga yang Didaur Ulang untuk Antibakteri dan Degradasi Metil Merah Secara Fotolisis

Jurnal Katalisator ◽

10.22216/jk.v4i1.3663 ◽

2019 ◽

Vol 4 (1) ◽

pp. 15

Author(s):

Ariyetti Ariyetti ◽

Muhammad Nasir ◽

Safni Safni ◽

Syukri Darajat

Keyword(s):

Escherichia Coli ◽

Staphylococcus Aureus ◽

Silver Nitrate ◽

Copper Sulfate ◽

Bacterial Growth ◽

Methyl Red ◽

Copper Metal ◽

Sulfate Hydrate ◽

Red Dye ◽

And Staphylococcus Aureus

Metil merah merupakan salah satu zat warna golongan azo yang sering digunakan dalam industri dan laboratorium. Penggunaan metil merah dapat menimbulkan efek terhadap kesehatan dan lingkungan. Oleh sebab itu dilakukan metode fotodegradasi dengan menggunakan semikonduktor dan radiasi sinar tampak. Semikonduktor yang digunakan yaitu berbahan dasar tembaga sulfat hidrat dan perak nitrat. Prekusor tembaga sulfat hidrat dibuat dari pengolahan limbah logam tembaga hasil pemotongan tembaga yang ada di bengkel Lembaga Ilmu Pengetahuan Indonesia (LIPI) Bandung. Bahan semikonduktor juga memiliki kemampuan dalam menghambat pertumbuhan bakteri. Hasil optimum yang didapatkan dalam proses fotodegradasi dan antibakteri merupakan gabungan antara kedua prekusor tembaga sulfat hidrat dan perak nitrat dengan bantuan penyinaran. Kemampuan dalam menghambat pertumbuhan bakteri didapatkan persentase kematian 100 % untuk masing-masing bakteri, yaitu Escherichia coli dan Staphylococcus aureus. Aktifitas fotokatalitiknya dengan konsentrasi semikonduktor 10 ppm untuk mendegradasi zat warna metil merah 5 ppm, selama 23 jam, dimana persentase degradasi yang didapatkan dengan penyinaran lebih tinggi dibandingkan dengan tanpa penyinaran. Pengaruh pH larutan terhadap degradasi metil merah yaitu optimum pada pH 12 (basa). Methyl red is one of the azo group dyes that is often used in industry and laboratories. The use of methyl red can have an effect on health and the environment. Therefore photodegradation method is done by using semiconductor and visible light radiation. The semiconductor used is based on copper sulfate hydrate and silver nitrate. The copper sulphate hydrate precursor is made from the processing of copper-cut copper metal waste in the workshop of the Indonesian Institute of Sciences (LIPI) in Bandung. Semiconductor materials also have the ability to inhibit bacterial growth. The optimum results obtained in the photodegradation and antibacterial process are a combination of both copper sulfate hydrate precursor and silver nitrate with the help of irradiation. The ability to inhibit bacterial growth obtained 100% mortality for each bacterium, namely Escherichia coli and Staphylococcus aureus. Photocatalytic activity with 10 ppm semiconductor concentration to degrade methyl red dye 5 ppm, for 23 hours, where the percentage of degradation obtained by irradiation is higher than without irradiation. The effect of pH of the solution on the degradation of methyl red is optimum at pH 12 (base).

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Coatings with recycled polyvinyl butyral on polyester and polyamide mono- and multifilament yarns

Journal of Coatings Technology and Research ◽

10.1007/s11998-020-00445-x ◽

2021 ◽

Author(s):

Rike Brendgen ◽

Carsten Graßmann ◽

Thomas Grethe ◽

Boris Mahltig ◽

Anne Schwarz-Pfeiffer

Keyword(s):

Mechanical Properties ◽

Chemical Resistance ◽

Crosslinking Agent ◽

Polyvinyl Butyral ◽

Polymer Dispersion ◽

Safety Glass ◽

Enhanced Properties ◽

Multifilament Yarns ◽

Textile Coating ◽

Recycled Material

AbstractPolyvinyl butyral is used in safety glass interlayers, mainly in car windshields. Legislative regulations require a recycling of cars after their lifetime and therefore also their safety glass. This causes the availability of recycled polyvinyl butyrate (r-PVB) originated from safety glass interlayers. Due to deteriorated optical properties, such as the transparency, and unknown amounts of plasticizers, it is challenging to reuse the recycled material in new windshields. Therefore, it is of particular interest to find new fields of application for r-PVB, such as the usage as a textile coating. In this research, r-PVB was investigated as a material for yarn coating. Polyester and polyamide mono- and multifilament yarns were coated continuously with solely a polymer dispersion and with mixtures of crosslinking agent and polymer dispersion. Crosslinked r-PVB coatings showed enhanced properties toward abrasion and chemical resistance. Coatings without the crosslinking agent showed a diminished abrasion resistance and could be washed off with ethanol. Mechanical properties of the monofilaments were influenced by the r-PVB coating in general. However, varying concentrations of the crosslinking agent did not affect the mechanical properties.

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