1.0MECC NANOFIBERhttps://mecc-jp.com/nanomecc-nanohttps://mecc-jp.com/nano/author/mecc-nano/rich600338<blockquote class="wp-embedded-content" data-secret="DRjl0tngVm"><a href="https://mecc-jp.com/nano/technology/10584/">Chitosan/PVA Mixed Solution Conductivity Measurement</a></blockquote><iframe sandbox="allow-scripts" security="restricted" src="https://mecc-jp.com/nano/technology/10584/embed/#?secret=DRjl0tngVm" width="600" height="338" title="“Chitosan/PVA Mixed Solution Conductivity Measurement” — MECC NANOFIBER" data-secret="DRjl0tngVm" frameborder="0" marginwidth="0" marginheight="0" scrolling="no" class="wp-embedded-content"></iframe><script> /*! This file is auto-generated */ !function(d,l){"use strict";l.querySelector&&d.addEventListener&&"undefined"!=typeof URL&&(d.wp=d.wp||{},d.wp.receiveEmbedMessage||(d.wp.receiveEmbedMessage=function(e){var t=e.data;if((t||t.secret||t.message||t.value)&&!/[^a-zA-Z0-9]/.test(t.secret)){for(var s,r,n,a=l.querySelectorAll('iframe[data-secret="'+t.secret+'"]'),o=l.querySelectorAll('blockquote[data-secret="'+t.secret+'"]'),c=new RegExp("^https?:$","i"),i=0;i<o.length;i++)o[i].style.display="none";for(i=0;i<a.length;i++)s=a[i],e.source===s.contentWindow&&(s.removeAttribute("style"),"height"===t.message?(1e3<(r=parseInt(t.value,10))?r=1e3:~~r<200&&(r=200),s.height=r):"link"===t.message&&(r=new URL(s.getAttribute("src")),n=new URL(t.value),c.test(n.protocol))&&n.host===r.host&&l.activeElement===s&&(d.top.location.href=t.value))}},d.addEventListener("message",d.wp.receiveEmbedMessage,!1),l.addEventListener("DOMContentLoaded",function(){for(var e,t,s=l.querySelectorAll("iframe.wp-embedded-content"),r=0;r<s.length;r++)(t=(e=s[r]).getAttribute("data-secret"))||(t=Math.random().toString(36).substring(2,12),e.src+="#?secret="+t,e.setAttribute("data-secret",t)),e.contentWindow.postMessage({message:"ready",secret:t},"*")},!1)))}(window,document); //# sourceURL=https://mecc-jp.com/nano/wp-includes/js/wp-embed.min.js </script> https://mecc-jp.com/nano/wp-content/uploads/2024/03/E-tsumugi.png10801080I’m Tsumugi, a researcher. This time, I investigated the conductivity of a mixed solution of chitosan and PVA. TsumugiShe is a second-year researcher in the Nanofiber Division of MECC.Her hobbies include reading science magazines and the latestresearch papers, as well as karate. Her special skill is speaking Chinese. 　　　 ObjectivePure PVA is highly conductive, but it is written in the literature that adding chitosan greatly reduces the solution’s conductivity. Curious about whether the conductivity really decreases, I conducted an experiment to see if this effect could provide insights into successful spinning of other natural polymers (such as gelatin) if the conductivity indeed decreases. MaterialsChitosan: 100PVA①: Gohsenol EG-22P (Mitsubishi Chemical)PVA②: Kuraray Poval 217 (Kuraray) Solution PreparationChitosan was added to a 50wt% acetic acid aqueous solution to make a 3wt% solution, which was then heated and stirred at 80°C. ＜Conductivity Measurement> The conductivity of the produced solution was measured. The results are shown in the table below.　　　　　 Table 1. Conductivity Measurement Results of PVA Solution Type of solution Conductivity (mS/cm) PVA① 37.9 PVA② 604 Chitosan / PVA①(1/1) 1596 Chitosan / PVA②(1/1) 1764 　　　　　　 Both PVA① and ② showed considerably high conductivity. It is likely that the acetic acid in the solution is involved. I also compared the conductivity in acetic acid and acetic acid aqueous solution.　 　　　　 Table 2. Conductivity Measurement Results of Acetic Acid Type of solution Conductivity (mS/cm) Acetic acid 0.05 Acetic acid / H2O(1/1) 868 　　　　 The conductivity of acetic acid alone was quite low. When made into an≫ more