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冻干机是真空冷冻干燥机的简称起源于19世纪20年代，随着冻干技术发展，在生物制药、食品、工业等领域广泛应用。目前通过冻干机进行纳米粉体冷冻干燥加工，作为纳米粉体冻干制备技术可以得到具有粉体颗粒可控、成分均匀性、分散性好等特点的纳米冻干粉体，得到行业高度认可。冻干机的工作原理是将要干燥的物料预先低温使物料冻结成固体，然后在超低温和真空状态的条件下，从冻结状态不经过融化直接升华去除水分的一种脱水方法。冻干机在纳米粉体冷冻干燥处理，是将驱体成分的溶液或溶胶在低于纳米溶液共晶点温度以下-10~-15℃冻结成固，再使固溶体或凝胶高真空状态下，通过循环控温使冻结的纳米物中固体的冰直接形成蒸汽后除去，留下含水1%左右的纳米粉体。经过冻干机的低温和真空环境下处理加工，不产生氧化和化学反应、升华干燥是物理性脱水，纳米溶质固定在冰晶支撑的框架结构中，不能相互迁移和连接，纳米物质留在支架内，过程中无氧化和化学反应，得到冻干纳米粉末是细小、多孔、分散均匀、纯度高、化学活性好，稳定性高。冻干机在纳米粉体冷冻干燥加工技术已比较成熟，目前纳米冷冻干燥技术进行纳米粉体处理能使纳米粉体材料具有声、光、电、磁、热、力等高性能特性，广泛应用在纳米碳酸钙冻干、纳米银冻干、纳米氧化锌冻干、纳米高岭土冻干、纳米二氧化硅冻干、碳纳米管冻干、石墨烯冷冻干燥等加工处理。LED">ABSolute;top:0;border:0;width:undefinedpx;height:undefinedpx;" SANdbox="allow-forms allow-popUPS allow-popups-to-escape-sandbox allow-same-origin allow-scripts allow-top-navigation-by-user-activation" frameborder="0" marginwidth="0" marginheight="0" vspace="0" hspace="0" allowtransparency="true" scrolling="no" src="https://googleads.g.doubleclick.net/pagead/ads?client=ca-pub-6745515041074118&ouTPUt=html&adk=1812271804&adf=3279755396&lmt=1689039989&plat=8%3A134217728%2C9%3A134250504%2C16%3A8388608%2C17%3A32%2C24%3A32%2C25%3A32%2C30%3A1081344%2C32%3A32%2C41%3A32%2C42%3A32&plas=260x595_l%7C308x595_r&format=0x0&url=https%3A%2F%2Fwww.bizrobot.com%2Fcompany_bloginfo.php%3Fact%3D1&ea=0&pra=5&wgl=1&uach=WyJXaW5kb3dzIiwiOC4wLjAiLCJ4ODYiLCIiLCIxMTQuMC41NzM1LjE5OSISW10SMCxudWxsLCI2NCIsW1siTm90LkEvQnJhbmQiLCI4LjAuMC4wIl0sWyJDaHJvbWl1bSIsIjExNC4wLjU3MzUuMTk5Il0sWyJHb29nbGUgQ2hyb21lIiwiMTE0LjAuNTczNS4xOTkiXV0sMF0.&dt=1689039988933&bpp=6&bdt=25&idt=81&shv=r20230706&mjsv=m202306290101&ptt=9&saldr=aa&cookie=ID%3D7464c2d56cd3c71f-229982a684e200ab%3AT%3D1688349264%3ART%3D1689039904%3AS%3DALNI_MYQBJaWSEVMc9g_wu9iGenmbynOcg&gpic=UID%3D00000c90745e1a1b%3AT%3D1688349264%3ART%3D1689039904%3AS%3DALNI_MbalJdzfhf69L5mBBp-r308m0NXLA&nras=1&correlator=307599689947&frm=23&ife=1&pv=2&ga_vid=2134348643.1689039989&ga_sid=1689039989&ga_hid=865367173&ga_fc=0&nhd=1&u_tz=480&u_his=4&u_h=900&u_w=1600&u_ah=860&u_aw=1600&u_cd=24&u_sd=1&DMC=8&adx=-12245933&ady=-12245933&biw=1583&bih=757&isw=730&ish=360&ifk=2699508910&scr_x=0&scr_y=0&eid=44759875%2C44759926%2C44759842%2C31075758%2C31075816%2C31075849%2C31076011%2C44788441&oid=2&pvsid=2620782642288149&tmod=1666221248&uas=0&nvt=1&ref=https%3A%2F%2Fwww.bizrobot.com%2Fcompany_bloginfo.php&fc=1920&brdim=0%2C0%2C0%2C0%2C1600%2C0%2C1600%2C860%2C730%2C360&vis=1&rsz=%7C%7Cs%7C&abl=NS&fu=32772&bc=31&ifi=1&uci=1.m8rxitk2w2el&fsb=1&dtd=102" data-google-container-id="1.m8rxitk2w2el" data-load-complete="true"> |