Kodi kutentha kwa kutentha kwa cellulose ether ether ether ether?

Kusungunuka kwamadzi kwa ma celluuse osinthika kumakhudzidwa ndi kutentha. Nthawi zambiri, cellulose ambiri imasungunuka m'madzi pamtunda wochepa. Kutentha kwakakwera, kusungunuka kwawo kumakhala osauka ndipo pamapeto pake amakhala opanda nzeru. Kutsika kotsika mtengo (LCST: Kutsika kotsika mtengo) ndi njira yofunikira kuti ikhale yosinthira ma cellulose ethel ethel ethel ethel ether pomwe kutentha kumachepetsa madzi.

Kutentha kwa mankhwala am'madzi am'madzi omwe amaphunziridwa komanso makina a kusintha kwa kusungunuka adafotokozedwa. Monga tafotokozera pamwambapa, pamene yankho la methylclulose limakhala kutentha pang'ono, macromolecles amazunguliridwa ndi mamolekyu amadzi kuti apange mawonekedwe am'madzi. Kutentha komwe kumayikidwa ndi kutentha kumatha kugunda kwa hydrogen pakati pa realule, ndipo molekyuti amasulutsidwa Ndipo phunzirani mayanjano a hydrophhobic a hydroxypropyll methylcellulose orm bordorn hydrogel. Ngati magulu a methyl pa unyolo yemweyo ndi wolumikizidwa, kuyanjana kumeneku kumapangitsa molekyu yonse kumawoneka. Komabe, kuchuluka kwa kutentha kumakulirapo gawo la gawo la unyolo, kulumikizana kwa Hydrophobic mu Molekyu kudzakhala kosakhazikika, ndipo ma molecular amasintha kuchokera ku boma mpaka boma. Pakadali pano, kulumikizana kwa hydrophophhabic pakati pa mamolekyules kumayamba kuwongolera. Kutentha pang'onopang'ono kumakwera pang'onopang'ono, maulalo ochulukirapo a hydrogen amathyoledwa, ndipo ma cellulose a ether olekanitsidwa ndi ma macropholecles omwe ali pafupi ndi ma hydrophobic argregate. Ndi kuchuluka kwake kwa kutentha, pamapeto pake maulendo a hydrogen onse athyoledwa, ndipo mayanjano ake a hydrophobic amafikira kuchuluka, kuwonjezera kuchuluka ndi kukula kwa hydrophobic ankhanza. Panthawi imeneyi, methylclulose imakhazikika pang'onopang'ono ndipo pamapeto pake mumadzimadzi. Kutentha kukakwera mpaka pomwe mawonekedwe a intaneti atatu amapangidwa pakati pa macromolecles, akuwoneka kuti akupanga gel macroscopically.

Jun Gao ndi George Haidar et aphunzira kutentha kwa hydroxyprose yankho la ma celroulpyl a hydroulupyl ndi pafupifupi 410C. Pa kutentha kwambiri kuposa 390c, umodzi wa ma hydroxpyl cellulose ali m'boma losasinthika, ndipo hydrodyyoynancy radius Kugawika kwa macromolecule. Matenthedwe akachulukitsidwa mpaka 390c, kulumikizana kwa hydrophobic pakati pa unyolo wa ma macromolecles akuphatikizika, ndipo madzi osungunuka a polymer a polymer amakhala osauka. Komabe, pa kutentha kumeneku, gawo laling'ono chabe la ma cellulose mamolekyulu amapanga maunyolo ochepa omwe ali ndi unyolo pang'ono, pomwe mamolekyulu ambiri adakali mkhalidwe womwazika unyolo umodzi. Kutentha kukakwera mpaka 400c, owonjezera macromolecules amatenga nawo gawo pakupanga kwa ozembetsa, ndipo kusamukirako kumakhala kovuta kwambiri, koma panthawiyi, mamolekyulu ena akadali mumisili imodzi. Matenthedwe akakhala okwanira 410c-440c, chifukwa cha ma nalekyu ochulukirapo pamtunda wambiri, mamolekyulu ena amasonkhana nanoparticles nanoparticles yokhala ndi yunifolomu yopanda tanthauzo. Zokwezeka zimakhala zazikulu komanso zokulirapo. Kupanga kwa zigawenga za Hydrophobic kumadzetsa mapangidwe a zigawo zapamwamba komanso zotsika kwambiri polymer polymer, otchedwa ma microscopic Gawo.

Iyenera kufotokozedwa kuti nanoparticle okalamba ali munthawi yokhazikika, osati malo okhazikika. Izi zili choncho chifukwa ngakhale malo oyamba a khola adawonongedwa, paliponse hydrogen wamphamvu pakati pa hydrophhilic hydroxyl hydroxyl hydroxyl gulu la hydrobyl, zomwe zimalepheretsa maboti a hydyrobic monga kuphatikiza pakati. Ma nanoparticle aggreorres adafika kukhazikika kwamphamvu komanso mokhazikika pansi pa zogwirizana ndi izi.

Kuphatikiza apo, phunziroli linazindikiranso kuti kulimbanso kuti kutentha kwamilambo kumathandizanso kukhazikitsidwa kwa tinthu tambiri. Pa mtengo wotentha msanga, kuphatikizika kwa ma unyolo molecular kumakhala kofulumira, ndipo kukula kwa ma nanopartive ndi ocheperako; Ndipo pamene kuphika kumakhala pang'onopang'ono, ma macromolecles ali ndi mwayi wambiri wopanga nanoparticle okalamba.