Umxube ongaphantsi kwamanzi, odlala indima ephambili ekuphuculeni ukusebenza kokwakha umdaka oxutywe nowomileyo, uxabisa ngaphezulu kwama-40% eendleko zezinto zokwakha umdaka oxutywe nowomileyo. Uninzi lwezixube kwimarike yasekhaya zibonelelwa ngabavelisi bamanye amazwe, kwaye ireferensi yemveliso ikwabonelelwa ngababoneleli. Ixabiso lemveliso yomdaka oxutywe nowomileyo lihlala liphezulu ngaloo ndlela, kwaye kunzima ukuthandwa ngodaka oluqhelekileyo lokwakha nolweplasta ngobuninzi nangoluhlu olubanzi. Iimveliso zemarike eziphezulu zilawulwa ziinkampani zamanye amazwe, kwaye abavelisi bomdaka oxutywe nowomileyo banengeniso ephantsi kwaye abanamaxabiso aphantsi; ukusetyenziswa kwezixube akunaphando lucwangcisiweyo nolujoliswe kulo, kwaye kulandela ngokungaboniyo iifomyula zamanye amazwe. Nantsi into esabelana ngayo nani kukuba, yintoni indima ye-hydroxypropyl methylcellulose kwizixube eziqhelekileyo zomdaka oxutywe nowomileyo?
I-Hydroxypropyl methylcellulose luhlobo lwe-cellulose oluphumayo kwaye lusetyenziswa kakhulu kwiminyaka yakutshanje. I-Hydroxypropyl methylcellulose yenziwe ngekotoni ecociweyo emva konyango lwe-alkalization, kusetyenziswa i-propylene oxide kunye ne-methyl chloride njengee-etherification agents, i-non-ionic cellulose mixed ether eyenziwe ngothotho lweempendulo. Iqondo lokutshintshwa ngokubanzi yi-1.2 ~ 2.0. Iimpawu zayo zahlukile ngokuxhomekeke kumlinganiselo womxholo we-methoxyl kunye nomxholo we-hydroxypropyl. Iimpawu ze-hydroxypropyl methylcellulose zezi zilandelayo:
1. I-hydroxypropyl methylcellulose inyibilika lula emanzini abandayo, kwaye iya kujongana nobunzima ekunyibilikeni emanzini ashushu. Kodwa ubushushu bayo be-gelation emanzini ashushu buphezulu kakhulu kunobo be-methyl cellulose. Ukunyibilika emanzini abandayo nako kuphucuke kakhulu xa kuthelekiswa ne-methyl cellulose.
2. Ubunzima be-hydroxypropyl methylcellulose bunxulumene nobunzima bayo be-molecular. Okukhona ubunzima be-molecular bukhulu, kokukhona i-viscosity iphezulu. Ubushushu buchaphazela nobunzima bayo, njengoko ubushushu busanda, ubuninzi be-viscosity buyancipha. Nangona kunjalo, impembelelo yobunzima bayo obuphezulu kunye nobushushu iphantsi kune-methyl cellulose. Isisombululo sayo sizinzile xa sigcinwe kubushushu begumbi.
3. Ukugcinwa kwamanzi kwe-hydroxypropyl methylcellulose kuxhomekeke kubungakanani bayo bokongeza, i-viscosity, njl.njl., kwaye izinga layo lokugcina amanzi phantsi kobungakanani obufanayo bokongeza liphezulu kunele-methyl cellulose.
4. I-Hydroxypropyl methylcellulose izinzile kwi-asidi kunye ne-alkali, kwaye isisombululo sayo samanzi sizinzile kakhulu kuluhlu lwe-pH = 2 ~ 12. I-Caustic soda kunye namanzi ekalika azinampembelelo ingako ekusebenzeni kwayo, kodwa i-alkali inokukhawulezisa ukunyibilika kwayo kwaye inyuse kancinci i-viscosity yayo. I-Hydroxypropyl methylcellulose izinzile kwi-viscosity eqhelekileyo, kodwa xa uxinzelelo lwe-viscosity ye-hydroxypropyl methylcellulose ludla ngokwanda.
5. I-hydroxypropyl methylcellulose ingaxutywa nee-polymers ezinyibilikayo emanzini ukuze zenze isisombululo esifanayo nesinoburhabaxa obuphezulu. Ezifana ne-polyvinyl alcohol, i-starch ether, i-vegetable gum, njl.
6. I-hydroxypropyl methylcellulose inokumelana okungcono kwee-enzyme kune-methylcellulose, kwaye amathuba okuwohloka kwe-enzyme yesisombululo sayo aphantsi kune-methylcellulose.
7. Ukunamathela kwe-hydroxypropyl methylcellulose kulwakhiwo lwe-mortar kuphezulu kunoko kwe-methylcellulose.
Ixesha lokuthumela: Meyi-09-2023