Udaka olumiswe ngomumo, inani lokungezwa le-hydroxypropyllllllllllllllllll pullulose HPMC liphansi kakhulu, kepha lingathuthukisa kakhulu ukusebenza ngodaka olumanzi, okuyisengezo esikhulu esithinta ukusebenza kodaka. I-Cellulose Afers ene-viscosity ehlukile nenani elingeziwe linomphumela omuhle ekuthuthukisweni kokusebenza kodaka owomile. Njengamanje, izindunduma ezinkulu kanye nodaka olubusayo zinezakhiwo ezingezinhle zokugcina amanzi, futhi ukuhlukaniswa kwamanzi okwenzeka ngemuva kwemizuzu embalwa yokuma namanje. Ukugcinwa kwamanzi kuwukusebenza okubalulekile kwe-methyl cellulose ether, futhi kungukusebenza okube abakhiqizi abaningi basekhaya obomile basekhaya, ikakhulukazi labo abasezindaweni ezinamazinga aphezulu aseningizimu, naka. Izici ezithinta umphumela wokugcinwa kwamanzi wodaka olomile ufaka inani le-HPMC elingeziwe, i-viscosity ye-HPMC, ukubusa kwezinhlayiya kanye nokushisa kwemvelo lapho kusetshenziswa khona.
1. Umqondo: I-Cellulose Ether yi-polymer ephakeme ye-moleculale eyenziwe kusuka ku-cellulose yemvelo ngokuguqulwa kwamakhemikhali. I-Cellulose Ether iyinto etholwa yiselula yemvelo. Ukukhiqizwa kwe-cellulose ether kuhlukile kwa-applemers zokwenziwa. Izinto zayo eziyisisekelo kakhulu ziyi-cellulose, i-polymer yemvelo yemvelo. Ngenxa yesakhiwo esikhethekile se-cellulose yemvelo, i-cellulose ngokwayo ayinakhono lokuphendula ngama-ejenti aphenyayo. Kepha ngemuva kokuthi i-ejenti yokuvuvukala iphathwe, izibopho eziqinile ze-hydrogen phakathi kwamaketanga ama-molefanel nangaphakathi kochungechunge zichithwe, futhi ukukhishwa okusebenzayo kweqembu le-hydroxyl kuphenduka kube yi-Alkali Cellulose esebenzayo. Ngemuva kokuthi i-ejenti yokusheshisa iphendula, iqembu le-Aloh liguqulwa libe yiqembu le-. Thola i-cellulose ether. Uhlobo lwe-cellulose ether luncike kuhlobo, inani kanye nokusatshalaliswa kwabangenisi. Ukuhlukaniswa kwezithathela ze-cellulose futhi kususelwa ezinhlotsheni zabangethwe esikhundleni, izinga lokuthezeka, ukugcwala nezinhlelo zokusebenza ezihlobene. Ngokusho kohlobo lokufakazelwa okufakwa esikhundleni se-molecular chain, kungahlukaniswa nge-monothert ne-ether exubile. I-HPMC sivame ukusebenzisa i-ether exubile. I-Hydroxypropylylylylylylylylyllose i-cellulose ether hpmc ingumkhiqizo lapho ingxenye yeqembu le-hydroxy ku-methoxy ifakwa esikhundleni se-methoxy gerow kanti enye ingxenye ithathelwa indawo yi-hydroxypropyll group. I-HPMC isetshenziswa kakhulu ezintweni zokwakha, ukumboza kwe-latex, umuthi, chemistry yansuku zonke, njll. Isetshenziswe njengomuntu omkhulu, i-ejenti yokugcina amanzi, i-stabilizer, ehlakazayo, ne-ejenti eyakha ifilimu.
Ukugcinwa kwe-cellulose ether: Ekukhiqizweni kwezinto zokwakha, ikakhulukazi udaka owomile, i-cellulose ether edlala indima engenakuphikwa, ikakhulukazi ekukhiqizweni kodaka olukhethekile (udaka olushintshiwe), kubalulekile. isakhi. Indima ebalulekile ye-cellulose ether ether ether ngodaka ikakhulukazi ezicini ezintathu. Eyokuqala umthamo wokugcina amanzi omuhle kakhulu, enye ithonya ekuguquguqukeni naseThixotropy lodaka, kanti okwesithathu ukuxhumana ngokosishi. Ukutholwa kokugcinwa kwamanzi kwe-cellulose ether kuncike ekufakweni kwamanzi kwesendlalelo sesisekelo, ukwakheka kodaka, ukushuba kodaka, ukufunwa kwamanzi ngodaka, kanye nesikhathi sokubeka izinto ezibonakalayo. Ukugcinwa kwamanzi i-ether ye-cellulose ngokwako kuvela ekuboshweni nasekupheshweni kwamaphethelo kwe-cellulose ether uqobo.
Ukuqina kanye ne-Thixotropy ye-cellulose ether: indima yesibili ye-cellulose ether-ukuqina kuncike ku: izinga le-polymerization ye-polymerization ye-cellulose ether, ukuhlupheka, izinga lokushisa kanye nezinye izimo. Izakhiwo ze-gelation zekhambi ziyizakhiwo ezihlukile ze-Alkyl Cellulose kanye nezinto zayo eziguquliwe. Izici ze-gelation zihlobene nezinga lokufaka esikhundleni, ukugxila kwesixazululo kanye nezithasiselo.
Umthamo omuhle wokugcina amanzi wenza i-hddration yesilo ephelele, ingathuthukisa ukuqina okumanzi kodaka olumanzi, kwandise amandla okubopha ngodaka, futhi isikhathi singalungiswa. Ukungezwa kwe-cellulose ether ku-mechan fafaza udaka kungathuthukisa ukufafaza noma ukupompa ukusebenza kodaka, kanye namandla ahlelekile. Ngakho-ke, i-cellulose ether iyasetshenziswa kabanzi njengesengezo esibalulekile ku-soture-verior-exutshwe ngodaka.
Isikhathi sePosi: Dec-16-2021