Indima ye-hydroxypropyl methyl cellulose kudaka olumanzi

Indima yeHPMCkudaka olumanzi

Udaka lomxube omanzi: Udaka oluxutyiweyo luhlobo lwesamente, i-aggregate efanelekileyo, i-admixture kunye namanzi, kwaye ngokuhambelana neempawu zamacandelo ahlukeneyo, ngokomlinganiselo othile, emva komlinganiselo kwisikhululo sokuxuba, ukuxuba, ukuhanjiswa kwindawo esetyenziswa yilori, kwisitya esinikezelweyo sokugcina, kwaye sisetyenziswe ngexesha elichaziweyo umxube omanzi ogqityiweyo.

IHydroxypropyl methyl cellulose isetyenziswa njengearhente yokugcina amanzi kudaka lwesamente, ukumpompa iretarder mortar. Kwi-gypsum njenge-binder yokuphucula isicelo kunye nokwandisa ixesha lokusebenza, i-hydroxypropyl methylcellulose i-HPMC ukugcinwa kwamanzi ukwenzela ukuba i-slurry emva kokumisa ayiyi kukhawuleza kwaye iqhube, ilukhuni ukuphucula amandla. Ukugcinwa kwamanzi kuyipropathi ebalulekileyo ye-hydroxypropyl methyl cellulose HPMC, kwaye ikwayinkxalabo yabaninzi abavelisi bodaka olumanzi. Izinto ezichaphazela umphumo wokugcinwa kwamanzi omdaka omanzi ziquka inani le-HPMC elongeziweyo, i-viscosity ye-HPMC, ukucolwa kwamasuntswana kunye nobushushu bokusebenzisa imo engqongileyo.
IHydroxypropyl methyl cellulose HPMC kudaka olumanzi indima ephambili kwimiba emithathu, omnye ngowomthamo ogqwesileyo wokubamba amanzi, okwesibini kukungaguquguquki kodaka olumanzi kunye nempembelelo yethixotropy, eyesithathu kukunxibelelana nesamente. Ukugcinwa kwamanzi kwi-ether cellulose kuxhomekeke kwisantya sokufunxa kwamanzi kwisiseko, ukwakheka kodaka lodaka, ubukhulu bodaka lodaka, imfuno yamanzi yodaka, ixesha lokumisela. Okukhona kuphezulu ukungafihli kwe-hydroxypropyl methyl cellulose, kokukhona kungcono ukugcinwa kwamanzi.
Izinto ezichaphazela ukugcinwa kwamanzi omdaka omanzi ziquka i-viscosity ye-cellulose ether, ukongeza inani, ubukhulu be-particle kunye nobushushu. Okukhona i-viscosity ye-cellulose ether, ngcono ukugcinwa kwamanzi. I-Viscosity yiparameter ebalulekileyo yokusebenza kwe-HPMC. Kwimveliso efanayo, ukusebenzisa iindlela ezahlukeneyo zokulinganisa i-viscosity yeziphumo ziyahluka ngokubanzi, ezinye zide zibe zimbini. Ke ngoko, uthelekiso lwe-viscosity kufuneka lwenziwe ngendlela efanayo yokuvavanya, kubandakanya ubushushu, i-rotor, njl.

Ngokuqhelekileyo, okukhona i-viscosity iphezulu, ngcono ukugcinwa kwamanzi. Nangona kunjalo, ukuphakama kwe-viscosity, ukuphakama kwe-molecular weight ye-HPMC, kunye ne-solubility ephantsi ye-HPMC, enefuthe elibi kumandla kunye nokusebenza kokwakhiwa kodaka. Okukhona i-viscosity iphezulu, kokukhona kucaca ngakumbi umphumo wokutyeba kodaka, kodwa awuhambelani ngokuthe ngqo. Ukuphakama kwe-viscosity, kokukhona udaka olumanzi luncangathi, ukusebenza kakuhle kolwakhiwo, ukusebenza kwe-viscous scraper kunye nokunamathela okuphezulu kwi-substrate. Nangona kunjalo, ukuphuculwa kwamandla okwakhiwa kodaka olumanzi ngokwalo akuzange kuncede. Zombini ulwakhiwo, ukusebenza akubonakali anti-ukuxhoma ukusebenza. Ngokwahlukileyo, i-viscosity ethile ephakathi kunye nephantsi kodwa i-hydroxypropyl methylcellulose elungisiweyo inomsebenzi ogqwesileyo ekuphuculeni amandla okwakhiwa kodaka olumanzi.
Ubuninzi be-cellulose ether PMC yodaka olumanzi olongeziweyo, ngcono ukugcinwa kwamanzi, ukuphakama kwe-viscosity, ngcono ukugcinwa kwamanzi. Ukulunga kukwayisalathisi sokusebenza esibalulekileyo se-hydroxypropyl methyl cellulose.
Ukulunga kwe-hydroxypropyl methyl cellulose nako kunempembelelo ethile ekugcineni amanzi. Ngaphantsi kweemeko eziqhelekileyo, i-viscosity efanayo kunye ne-fineness eyahlukileyo ye-hydroxypropyl methyl cellulose, phantsi komlinganiselo ofanayo wokongezwa, i-fineness encinci yempembelelo yokugcina amanzi ingcono.
Kumdaka omanzi, ukongezwa kwe-cellulose etherHPMCiphantsi kakhulu, kodwa inokuphucula ngokubonakalayo ukwakhiwa kodaka olumanzi, lolona luhlu luphambili oluchaphazela kakhulu ukusebenza kodaka. Ukusebenza kodaka olumanzi kuphenjelelwa kakhulu kukhetho olufanelekileyo lwe-hydroxypropyl methyl cellulose.