{"id":7454,"date":"2023-03-13T14:29:59","date_gmt":"2023-03-13T05:29:59","guid":{"rendered":"https:\/\/www.mecc-nano.com\/?page_id=7454"},"modified":"2024-12-05T15:18:16","modified_gmt":"2024-12-05T06:18:16","slug":"technology-1","status":"publish","type":"page","link":"https:\/\/mecc-jp.com\/nano\/technology-1\/","title":{"rendered":"Electrospinning Method"},"content":{"rendered":"\n<div class=\"section\">\n<div id=\"a01\">&nbsp;<\/div>\n<p>Major features of the electrospinning method is to spin a variety of materials (mainly polymers) into nanofiber shapes and control of fiber shapes is relatively easy.<br>Research up to now realized electrospinning of the following materials.<br>(See Fig.1)<\/p>\n<ul>\n<li>Industrial thermoplastic polymer<\/li>\n<li>Biodegradable polymer<\/li>\n<li>Polymer blend<\/li>\n<li>Composite materials mixed with inorganic compounds<\/li>\n<\/ul>\n<\/div>\n\n\n\n<div class=\"section\">\n<div class=\"blockC mb50\"><img decoding=\"async\" class=\"mt10 mb20\" src=\"https:\/\/mecc-jp.com\/nano\/wp-content\/uploads\/2024\/12\/\u30a8\u30ec\u30af\u30c8\u30ed\u30b9\u30d4\u30cb\u30f3\u30b0\u306b\u3064\u3044\u3066_e.jpg\" alt=\"\"><br><strong>Fig.1 Principles of electrospinning<\/strong><\/div>\n<p>In recent years spinning cases of the ceramic nanofibers such as Alumina, Zirconium oxide, Titanium oxide and Lead zirconate titanate are reported frequently.<br>Electrospinning method usually uses solutions in which materials dissolve in solvents as spinning materials.<br>Electrospinning system, as shown in Fig. 1, consists of a high voltage power supply,&nbsp; polymer solutions, a storage tank, a spinneret and a grounded collector.&nbsp; Polymer solutions will be pushed out of a tank to a spinneret at a constant speed.<\/p>\n<p>High voltage at 20kV to 40kV will be applied to a spinneret and polymer solution jet will be injected to a collector when electrical attraction exceeds surface tension of polymer solutions.&nbsp; Solvents in jets are gradually volatilized and jets will reduce to nanometer level when they reach a collector.<\/p>\n<\/div>\n\n\n\n<div class=\"section\">\n<div class=\"itemimg005\">\n<div class=\"blockC mb50\"><img decoding=\"async\" src=\"https:\/\/mecc-jp.com\/nano\/wp-content\/uploads\/2024\/12\/\u2469\u7e4a\u7dad\u5f84100nm-200nm.jpg\" alt=\"\" width=\"250\"><br><strong>Fig. 2<\/strong><\/div>\n<p>Electrospun nanofibers forms membranes shown in Fig. 2. Orientations of fibers depend on a collector.Nanofiber membranes are known that its total surface area per volume is much more than that of micrometer-size fiber membranes.<\/p>\n<\/div>\n<\/div>\n\n\n\n<div class=\"section\">\n<div class=\"flexarea itemBox06\">\n<div><img decoding=\"async\" src=\"https:\/\/mecc-jp.com\/nano\/wp-content\/uploads\/2022\/03\/tec_002.jpg\" alt=\"\"><br><span class=\"fS\">Beaded fiber<\/span><\/div>\n<div><img decoding=\"async\" src=\"https:\/\/mecc-jp.com\/nano\/wp-content\/uploads\/2022\/03\/tec_003.jpg\" alt=\"\"><br><span class=\"fS\">Aligned fiber<\/span><\/div>\n<div><img decoding=\"async\" src=\"https:\/\/mecc-jp.com\/nano\/wp-content\/uploads\/2022\/03\/tec_004.jpg\" alt=\"\"><br><span class=\"fS\">Nanoflament<\/span><\/div>\n<\/div>\n<p class=\"blockC\"><strong>Fig. 3<\/strong><\/p>\n<p>As a result, nanofibers obtain unprecedented characteristics by having chemical or physical modifications, and new applications in various fields are expected.<\/p>\n<p>As shown in Fig. 3, even if the same polymer is spun, fibers in different shapes, such as smooth-surface fibers, beaded fibers and porous fibers, can be made by changing spinning parameters.<\/p>\n<\/div>\n\n\n\n<div class=\"section\">\n<p>Parameters in terms of electrospinning are generally divided into three groups of solution characteristics, spinning environment and spinning conditions.&nbsp; (Fig. 4)<\/p>\n<div class=\"flexarea\">\n<div class=\"itemBox03\">\n<div class=\"title\">Solution Characteristics<\/div>\n<p>\u30fbSolution concentration<br>\u30fbViscocity<br>\u30fbConductivity<br>\u30fbElasticity<br>\u30fbSurface tension<\/p>\n<\/div>\n<div class=\"itemBox03\">\n<div class=\"title\">Spinning Environment<\/div>\n<p>\u30fbAmbience temperature<br>\u30fbHumidity<br>\u30fbBarometric pressure<\/p>\n<\/div>\n<div class=\"itemBox03\">\n<div class=\"title\">Spinning Conditions<\/div>\n<p>\u30fbVoltage to apply<br>\u30fbSolution discharge amount<br>\u30fbDistance between collector and spinneret<br>\u30fbWinding speed of a collector<\/p>\n<\/div>\n<\/div>\n<p><strong>Fig. 4 Parameters of electrospinning method to influence shapes of nanofibers.<\/strong><\/p>\n<\/div>\n\n\n\n<div class=\"section\"><img decoding=\"async\" class=\"fltR\" src=\"https:\/\/mecc-jp.com\/nano\/wp-content\/uploads\/2022\/03\/img_technology02.jpg\" alt=\"\">How to combine such parameters will be &#8220;knowhow.&#8221; It is most difficult to find out the best spinning conditions to obtain desired shape of nanofibers, which usually takes a long time period.\n<p>So much time has been taken by many people to figure out relevancy between such parameters and shapes of fibers, however, it is becoming clearer in these days.<\/p>\n<p>Polymer concentration of spinning solution is obviously the most important factor to control diameters of polymer fibers.&nbsp; Also, design of a collector will be important to control orientation of fibers.<\/p>\n<p>Aligned nanofiber samples made with a disk collector is shown in Fig. 5.&nbsp; There are several important parameters to be controlled such as fiber diameters, surface shapes and orientations.<\/p>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>&nbsp; Major features of the electrospinning method is to spin a variety of materials (mainly polymers) into nanofiber shapes and control of fiber shapes is relatively easy.Research up to now realized electrospinning of the following materials.(See F<a href=\"https:\/\/mecc-jp.com\/nano\/technology-1\/\" class=\"excerpt_link\">\u226b more<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"page-technology.php","meta":{"footnotes":""},"class_list":["post-7454","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/mecc-jp.com\/nano\/wp-json\/wp\/v2\/pages\/7454","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/mecc-jp.com\/nano\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/mecc-jp.com\/nano\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/mecc-jp.com\/nano\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/mecc-jp.com\/nano\/wp-json\/wp\/v2\/comments?post=7454"}],"version-history":[{"count":3,"href":"https:\/\/mecc-jp.com\/nano\/wp-json\/wp\/v2\/pages\/7454\/revisions"}],"predecessor-version":[{"id":14165,"href":"https:\/\/mecc-jp.com\/nano\/wp-json\/wp\/v2\/pages\/7454\/revisions\/14165"}],"wp:attachment":[{"href":"https:\/\/mecc-jp.com\/nano\/wp-json\/wp\/v2\/media?parent=7454"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}