Chitsanzo cha cellulose ether

Cellulose etherMwachitsanzo ndi polima pawiri wopangidwa ndi mapadi ndi kamangidwe ka 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. Ndiwopangidwa ndi m'malo mwa hydroxyl hydrogen ndi gulu la hydrocarbon mu cellulose polima. 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 ethersMwachitsanzo akhoza kugawidwa mu ether imodzi (monga methyl cellulose) ndi ether wosakanizidwa (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, mwakhungu kutsatira 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 zoteteza colloid, "phukusi" particles olimba, ndi kunja kwake pamwamba kupanga wosanjikiza kondomu filimu, ndi slurry dongosolo khola, komanso bwino mu kusanganikirana ndi kusakaniza ndondomeko yamadzimadzi yomanga, komanso bwino mu kusanganikirana ndi mlomo ndondomeko ya kusanganikirana kwa zomanga. komanso.

(2)Cellulose ethernjira chifukwa chake maselo kapangidwe makhalidwe, kuti madzi mu matope n'zovuta kutaya, ndipo pang'onopang'ono anamasulidwa mu nthawi yaitali, kupereka matope zabwino posungira madzi ndi workability.