Chitsanzo cha cellulose ether

Cellulose ether Chitsanzo ndi polima pawiri yopangidwa ndi mapadi okhala ndi ether.Aliyense mphete shuga mu mapadi macromolecule lili magulu atatu hydroxyl, chachikulu hydroxyl gulu pa chachisanu ndi chimodzi mpweya atomu, ndi yachiwiri hydroxyl gulu lachiwiri ndi lachitatu maatomu mpweya.Hydrojeni mu gulu la hydroxyl amalowetsedwa ndi gulu la hydrocarbon kuti apange cellulose.Ndi chotulukapo cha m'malo mwa hydroxyl haidrojeni ndi gulu la hydrocarbon mu polima wa cellulose.Cellulose ndi polyhydroxy polima pawiri yomwe simasungunuka kapena kusungunuka.Ma cellulose amatha kusungunuka m'madzi, kusungunula alkali solution ndi organic zosungunulira pambuyo pa etherification, ndipo amakhala ndi thermoplastic properties.

Ma cellulose ether ndi mawu ambiri azinthu zingapo zomwe zimapangidwa ndi zomwe alkali cellulose ndi etherifying agent pansi pazifukwa zina.Ma cellulose a alkali amalowetsedwa ndi ma etherifying agents osiyanasiyana kuti apeze ma cellulose ethers osiyanasiyana.

Malinga ndi ma ionization a zinthu zolowa m'malo, ma cellulose ether amatha kugawidwa mu ionic (monga carboxymethyl cellulose) ndi non-ionic (monga methyl cellulose) magulu awiri.

Malinga ndi mtundu wa zolowa m'malo, ma cellulose ether amatha kugawidwa kukhala ether imodzi (monga methyl cellulose) ndi ether yosakanikirana (monga hydroxypropyl methyl cellulose).Malinga ndi solubility, amatha kugawidwa m'madzi osungunuka (monga hydroxyethyl cellulose) ndi organic solvent solubility (monga ethyl cellulose).Zouma zosakaniza matope makamaka zimagwiritsa ntchito mapadi osungunuka m'madzi, omwe amatha kugawidwa m'mitundu yosungunuka mwachangu komanso kuchedwa kusungunuka pambuyo pa chithandizo chapamwamba.

Ma Admixtures amagwira ntchito yofunika kwambiri pakuwongolera matope osakanizidwa owuma ndipo amawerengera ndalama zoposa 40% zamtengo wapatali mumatope osakaniza.Gawo lalikulu la kuphatikizika pamsika wapakhomo limaperekedwa ndi opanga akunja, ndipo kuchuluka kwazomwe zimaperekedwanso kumaperekedwa ndi ogulitsa.Chotsatira chake, mtengo wazinthu zamatope owuma umakhalabe wokwera, ndipo zimakhala zovuta kufalitsa matope wamba wamba ndi pulasitala ndi matope ambiri komanso malo ambiri.Zogulitsa zamsika zapamwamba zimayendetsedwa ndi makampani akunja, opanga matope owuma amapeza phindu lochepa, kutsika mtengo kwamtengo wapatali;Kugwiritsa ntchito admixture alibe kafukufuku mwadongosolo ndi chandamale, kutsatira mwakhungu formulations yachilendo.

Wosungira madzi ndiye chinthu chofunikira kwambiri chophatikizira kuti madzi asungidwe mumatope owuma owuma komanso chimodzi mwazinthu zofunikira kwambiri kuti mudziwe mtengo wazinthu zamatope owuma.Ntchito yayikulu ya cellulose ether ndikusunga madzi.

Kachitidwe ka cellulose ether mumatope ndi motere:

(1) matope mu mapadi etero kusungunuka m'madzi, chifukwa pamwamba yogwira ntchito kuonetsetsa gelled zakuthupi bwino yunifolomu kugawa mu dongosolo, ndi mapadi efa ngati mtundu wa colloid zoteteza, "phukusi" olimba particles, ndi kunja kwake pamwamba kuti kupanga wosanjikiza kondomu filimu, ndi slurry dongosolo khola, komanso bwino slurry mu kusanganikirana ndondomeko liquidity ndi yomanga kuzembera mwina komanso.

(2) Ma cellulose etha njira chifukwa cha mawonekedwe ake maselo kapangidwe, kuti madzi mu matope n'zovuta kutaya, ndipo pang'onopang'ono anamasulidwa mu nthawi yaitali, kupereka matope zabwino posungira madzi ndi workability.