Kodi mfundo ya etherification synthesis ya hydroxypropyl methylcellulose ndi chiyani?

Hydroxypropyl methylcellulose amagwiritsidwa ntchito ngati gawo lapansi lopangira mafuta, omwe amatha kuzindikira kugwiritsa ntchito shuga wathunthu, kuwongolera kagwiritsidwe ntchito kazinthu zopangira, kuchepetsa gawo lotsalira la gawo lapansi mumitsuko yowotchera, komanso kuchepetsa mtengo wamankhwala amadzi oyipa. Izi hydroxypropyl methylcellulose Khalidwe lalikulu ndi yabwino kukhathamiritsa kwa mtanda, kudyetsedwa-mtanda ndi mosalekeza nayonso mphamvu njira, kupewa mndandanda wa mavuto monga kulamulira sing'anga zikuchokera ndi dilution mlingo; zimathandizanso kuwongolera njira yowotchera.

Hydroxypropyl methylcellulose, zopangira mapadi, akhoza woyengeka thonje kapena zamkati nkhuni. Ndikofunikira kwambiri kuphwanya musanayambe alkalization kapena panthawi ya alkalization. Kuphwanya ndikuwononga cellulose zopangira ndi mphamvu zamakina. The aggregation boma dongosolo la mapadi macromolecules akhoza kuchepetsa mlingo wa crystallinity ndi polymerization, kuonjezera pamwamba m'dera, potero kuwongolera Kufikika ndi mankhwala anachita luso anachita reagent kwa magulu atatu hydroxyl pa shuga mphete gulu la mapadi macromolecule.

Ngakhale kaphatikizidwe mfundo ya etherification wa hydroxypropyl methylcellulose si zovuta, madera osiyanasiyana alkalization, zopangira kuphwanya, etherification, zosungunulira kuchira, centrifugal kulekana, kutsuka ndi kuyanika kumaphatikizapo chiwerengero chachikulu cha matekinoloje kiyi ndi olemera zidziwitso. Kwa mitundu yosiyanasiyana yazinthu, chilengedwe chilichonse chimakhala ndi zowongolera zaposachedwa, monga kutentha, nthawi, kupanikizika komanso kuwongolera kwazinthu. Zida zothandizira ndi zida zowongolera ndizotsimikizira zabwino zamtundu wokhazikika wazinthu komanso machitidwe odalirika opanga.

Popeza ntchito ya hydroxypropyl methylcellulose ndi yofanana ndi ma ether ena osungunuka m'madzi, angagwiritsidwe ntchito ngati filimu yopanga mafilimu, thickener, emulsifier ndi stabilizer mu utoto wa latex ndi zigawo za penti zosungunuka zamadzi.

Pangani ❖ kuyanika filimu kukhala zabwino kuvala kukana, kusanja ndi adhesion, ndi kusintha maganizo pamwamba, bata ndi asidi ndi zamchere, ndi ngakhale zitsulo inki. Hydroxypropyl methylcellulose imakhala ndi zotsatira zabwino ngati zokometsera za utoto woyera wa polyvinyl acetate. Mlingo wa m'malo mwa cellulose ether ukuwonjezeka, ndipo kukana kukokoloka kwa bakiteriya kumakulitsidwanso.