「AlpFilm Protect PVC」可以在15分鐘內使接觸的99.99％新冠病毒失去活性。照片來源：braskem新聞稿
科學團隊發現，半導體二氧化矽與金屬銀奈米粒子結合會產生活性，所生成的氧化分子能夠在三分鐘內消滅79.9％的新冠病毒，短短15分鐘內可消滅99.99％的新冠病毒。
科學家表示，這些奈米顆粒的氧化能力可以破壞新冠病毒的外脂質層，防止病毒在材料表面附著和擴散。
這種創新塑膠薄膜由Braskem、AlpFilm和Nanox三家公司以及巴西的聖卡洛斯聯邦大學和西班牙漢姆一世大學學者合作開發。
兩所大學與Nanox早在2014年就開發出具有抗真菌和殺菌功能的專利透明銀微粒PVC薄膜。在武漢肺炎（COVID-19）疫情之下，該團隊改良他們的抗真菌和殺菌PVC薄膜，以對抗新冠病毒。
Braskem和AlpFilm的科學家調整了薄膜的成分，盡可能提高對真菌、細菌和病毒的防護能力。新材料在聖保羅大學生物醫學研究所的P3實驗室（三級生物安全實驗室）驗證抗新冠病毒（SARS-CoV-2）能力，以符合塑膠和其他無孔表面抗病毒活性的技術標準。
Braskem也表示，改良後的PVC薄膜可製成一系列基本產品，從醫療、醫院產品到包裝，確保食品安全、衛生和清潔等，從而增強對抗新冠病毒的能力。
在聖保羅研究基金會的支持下，Nanox也開發出一種表面含有銀微粒、可以消滅新冠病毒的織品。在實驗室測試中，這種織品在接觸兩分鐘後消滅了99.99％的新冠病毒。這種織品是聚酯和棉混紡，並透過浸泡、乾燥和固定過程滲入銀微粒。Nanox已經為此創新材料申請專利。
Silica-Silver Plastic Film Kills Coronavirus on Contact
SAO PAULO, Brazil, February 13, 2021 (ENS)
A plastic film that can deactivate 99.99 percent of the virus that causes COVID-19 in 15 minutes has been released by an international team of companies and universities from Brazil and Spain. The product, AlpFilm Protect PVC, is now on the market and is being used to pack meat, fruit, vegetables and cold meats, and to protect surfaces.
The scientific team found that silica is a semiconductor that becomes active with metallic silver nanoparticles to generate oxidative molecules capable of deactivating 79.9 percent of the new coronavirus in three minutes and 99.99 percent in just 15 minutes.
The scientists highlight the oxidative capacity of these nanoparticles to destroy the outer lipid layer of the coronavirus and thus prevent the adhesion and proliferation of the virus on the surface of materials.
The scientific team behind this innovative plastic film is made up of three companies – Braskem, AlpFilm and Nanox – and two universities – the Federal University of São Carlos in Brazil and Universidad Jaume I of Castellón in Spain.
A scientific collaboration that started 15 years ago between the two universities and Nanox had yielded a product with antifungal and bactericidal properties back in in 2014 – a transparent polyvinyl chloride, PVC, film suffused with silver microparticles.
That plastic film they developed six years ago has now become marketable anti-viral technology patented by Nanox, with the support of the vinyl application engineering team of Braskem, the largest petrochemical company in Latin America, and AlpFilm, a Brazilian family company that is one of the main manufacturers of PVC plastic films in Brazil.
The team was inspired by the urgent needs of the pandemic to rethink their antifungal and bactericidal PVC film to see if it could be reconfigured to protect against SARS-CoV-2, the virus that causes the disease COVID-19.
Scientists with Braskem and AlpFilm improved the film’s formula, maximizing its protection potential against fungi, bacteria, and viruses.
The tests to verify the power of the new plastic packaging to suppress SARS-CoV-2 were conducted at the level 3 biosecurity laboratory of the Institute of Biomedical Sciences of the University of Sao Paulo in compliance with the technical standard for measuring the antiviral activity in plastics and other non-porous surfaces.
PVC solutions enable the production of a series of essential products ranging from medical and hospital products to packages, which ensure food safety, hygiene and cleanliness, among other factors, bolstering the fight against COVID-19.
Nanox, with the support of the São Paulo Research Foundation’s program focused on innovative research in small enterprises, has developed a fabric with silver microparticles on its surface that can inactivate the SARS-CoV-2 virus.
In laboratory tests, this material eliminated 99.9 percent of the virus after two minutes of contact.
This virus-killing fabric is a mixture of polyester and cotton and contains two types of silver microparticles that penetrate its surface through an immersion, drying and fixing process. Nanox has already registered its patent application for the innovative material.
本文獲《環境資訊中心》授權轉載，原文：科學家研發特殊PVC保鮮膜 15分鐘可殺死99.99%新冠病毒
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