Isalathisi se-viscosity se-hydroxypropyl methylcellulose sisalathisi esibaluleke kakhulu. I-viscosity ayimeli ubunyulu. I-viscosity ye-cellulose HPMC ixhomekeke kwinkqubo yemveliso. Iindawo ezahlukeneyo zokusetyenziswa kufuneka zikhethe i-cellulose HPMC ene-viscosities ezahlukeneyo, hayi ukuba i-viscosity ye-cellulose HPMC iphezulu, kokukhona ingcono! Okulungileyo kulungile!
1. Ulawulo lokuxinana
I-hydroxypropyl methylcellulose ene-viscosity ephezulu ayinakuvelisa i-cellulose ephezulu kakhulu kuphela ngokuyitshiza nge-vacuum kunye nokutshintshwa kwe-nitrogen kwimveliso. Ngokubanzi, ukuveliswa kwe-cellulose ene-viscosity ephezulu eTshayina akunakulawulwa. Nangona kunjalo, ukuba imitha ye-oxygen encinci ingafakwa kwiketile, ukuveliswa kwe-viscosity yayo kunokulawulwa ngokwenziwa.
2. Ukusetyenziswa kwearhente yombutho
Ukongeza, xa ucinga ngesantya sokutshintshwa kwe-nitrogen, kulula ukuvelisa iimveliso ezinobungqindilili obuphezulu nokuba inkqubo ingena moya kangakanani na. Kakade ke, inqanaba lokupholimeyitha komqhaphu ocociweyo nalo libalulekile. Ukuba oko akusebenzi, kwenze ngokudibanisa i-hydrophobic. Kukho ii-arhente zokudibanisa kule ndawo eTshayina. Uhlobo lwe-arhente yokudibanisa omawuyikhethe lunempembelelo enkulu ekusebenzeni kwemveliso yokugqibela.
3. Umxholo weHydroxypropyl
Ioksijini eseleyo kwi-reactor ibangela ukuwohloka kwe-cellulose kunye nokwehla kobunzima be-molecular, kodwa ioksijini eseleyo ilinganiselwe, lo gama nje iimolekyuli eziphukileyo ziphinde zahlanganiswa, akunzima ukwenza i-viscosity ephezulu. Nangona kunjalo, izinga lokugcwala linxulumene kakhulu nomxholo we-hydroxypropyl. Ezinye iifektri zifuna ukunciphisa ixabiso kunye nexabiso kuphela, kodwa azifuni ukwandisa umxholo we-hydroxypropyl, ngoko ke umgangatho awunakufikelela kwinqanaba leemveliso ezifanayo zangaphandle.
4. Ezinye izinto
Izinga lokugcina amanzi lemveliso linobudlelwane obuhle ne-hydroxypropyl, kodwa kuyo yonke inkqubo yokusabela, ikwamisela izinga lokugcina amanzi, isiphumo se-alkaliization, umlinganiselo we-methyl chloride kunye ne-propylene oxide, uxinano lwe-alkali kunye nokugcinwa kwamanzi. Umlinganiselo wekotoni ecociweyo umisela ukusebenza kwemveliso.
Ixesha lokuthumela: Epreli-04-2023