Okwangoku, umgangatho we-hydroxypropyl methylcellulose yasekhaya uyahluka kakhulu, kwaye ixabiso liyahluka kakhulu, okwenza kube nzima kubathengi ukuba benze ukhetho olufanelekileyo.I-HPMC elungisiweyo yenkampani efanayo yangaphandle sisiphumo seminyaka emininzi yophando.Ukongezwa kwezinto zokulandelela kunokuphucula ukusebenza kokwakhiwa kunye nokuphucula ukusebenza.Ewe kunjalo, iya kuchaphazela ezinye iipropathi, kodwa ngokuqhelekileyo iyasebenza;Injongo yokongeza ezinye izithako kukunciphisa iindleko, okubangela ukunciphisa kakhulu ukugcinwa kwamanzi, ukubambisana kunye nezinye iimpawu zemveliso, okubangelwa iingxaki ezininzi zomgangatho wokwakha.
Kukho iyantlukwano elandelayo phakathi kwe-HPMC esulungekileyo kunye ne-HPMC egqwethiweyo:
1. I-HPMC ecocekileyo ibonakele kwaye ine-low bulk density, ukusuka kwi-0.3-0.4g / ml;HPMC exutyiweyo ine fluidity engcono kwaye uziva enzima, nto leyo ngokucacileyo eyahlukileyo ukusuka imveliso yokwenene ngenkangeleko.
2. Isisombululo esicocekileyo se-HPMC samanzi sicacile, ukuhanjiswa kokukhanya okuphezulu, kunye nesantya sokugcinwa kwamanzi ≥ 97%;exutyiweyo HPMC isisombululo samanzi sinamafu, kwaye izinga lokugcinwa kwamanzi kunzima ukufikelela 80%.
3. I-HPMC ecocekileyo akufanelekanga ukuba ivumba i-ammonia, isitashi kunye notywala;I-HPMC egqwethiweyo inokujoja zonke iintlobo zamavumba, nokuba ayinancasa, iya kuziva inzima.
4. I-HPMC powder ecocekileyo i-fibrous phantsi kwe-microscope okanye iglasi yokukhulisa;I-HPMC egqwethiweyo inokubonwa njengezinto eziqinileyo zegranular okanye iikristale phantsi kwemakroskopu okanye iglasi yokukhulisa.
Ukuphakama okungenakugqithiswa kwe-200,000?
Iingcali ezininzi zasekhaya kunye nabaphengululi baye bapapasha amaphepha akholelwa ukuba imveliso ye-HPMC ithintelwe ukhuseleko lwezixhobo zasekhaya kunye nokutywinwa, inkqubo ye-slurry kunye nemveliso ephantsi yoxinzelelo, kwaye amashishini aqhelekileyo akakwazi ukuvelisa iimveliso ezine-viscosity engaphezu kwe-200,000.Ehlotyeni, akunakwenzeka ukuvelisa iimveliso ezine-viscosity engaphezu kwama-80,000.Bakholelwa ukuba ezi zinto zibizwa ngokuba ziimveliso ezingama-200,000 kufuneka zibe ziimveliso zomgunyathi.
Iingxoxo zengcali azikho ngqiqweni.Ngokwemeko yangaphambili yemveliso yasekhaya, ezi zigqibo zingasentla zinokuthathwa ngokwenene.
Isitshixo ekwandiseni i-viscosity ye-HPMC kukutywinwa okuphezulu kwe-reactor kunye nokusabela koxinzelelo oluphezulu kunye nemathiriyeli ekrwada ekumgangatho ophezulu.Umoya ophezulu ukhusela ukuthotywa kwe-cellulose nge-oksijini, kwaye imeko yokusabela kwengcinezelo ephezulu ikhuthaza ukungena kwe-etherification agent kwi-cellulose kwaye iqinisekisa ukufana kwemveliso.
Isalathiso esisisiseko se-200000cps hydroxypropyl methylcellulose:
I-2% ye-viscosity yesisombululo samanzi 200000cps
Ucoceko lwemveliso ≥98%
Umxholo we-Methoxy 19-24%
Umxholo weHydroxypropoxy: 4-12%
Iimpawu ze-200000cps ze-hydroxypropyl methylcellulose:
1. Ugcino lwamanzi olugqwesileyo kunye neempawu zokuqina ukuze kuqinisekiswe i-hydration epheleleyo ye-slurry.
2. Amandla aphezulu okudibanisa kunye nefuthe elibalulekileyo lokungenisa umoya, ukuthintela ngokufanelekileyo ukucutha kunye nokuqhekeka.
3. Ukulibazisa ukukhutshwa kobushushu be-cement hydration, ukulibazisa ixesha lokumisela, kunye nokulawula ixesha elisebenzayo lodaka lwesamente.
4. Ukuphucula ukuhambelana kwamanzi kwi-pumped mortar, ukuphucula i-rheology, kunye nokuthintela ukuhlukana kunye nokuphuma kwegazi.
5. Iimveliso ezikhethekileyo, ezijolise kwindawo yokwakhiwa kweqondo lokushisa eliphezulu ehlotyeni, ukuqinisekisa ukuba i-hydration esebenzayo ye-slurry ngaphandle kwe-delamination.
Ngenxa yolawulo oluxengaxengayo lwemarike, ukhuphiswano kushishino lodaka luya lusiba lubi kakhulu.Ukwenzela ukulungiselela imarike, abanye abarhwebi baye baxuba isixa esikhulu sezinto ezinexabiso eliphantsi ukuvelisa i-ether cellulose ephantsi.Apha, umhleli unyanzelekile ukuba akhumbuze abathengi ukuba bangalandeli ngokumfamekileyo amaxabiso aphantsi, ukuze bangakhohliswa Khohliswa, bakhokele kwiingozi zobunjineli, kwaye ekugqibeleni ilahleko ingaphezulu kweenzuzo.
Iindlela zokukrexeza eziqhelekileyo kunye neendlela zokuchonga:
(1) Ukongezwa kwe-amide kwi-ether ye-cellulose kunokunyusa ngokukhawuleza i-viscosity yesisombululo se-cellulose ether, okwenza kube nzima ukuyichonga nge-viscometer.
Indlela yokuchonga: Ngenxa yeempawu ze-amides, olu hlobo lwesisombululo se-cellulose ether luhlala luba ne-stringing phenomenon, kodwa i-ether ye-cellulose enhle ayiyi kubonakala i-stringing phenomenon emva kokuchithwa, isisombululo sifana ne-jelly, ebizwa ngokuba yi-sticky kodwa ayixhunyiwe.
(2) Yongeza istatshi kwi-cellulose ether.Isitatshi asinyibiliki emanzini, kwaye isisombululo sisoloko sinokuhanjiswa kokukhanya okulambathayo.
Indlela yokuchonga: Ukulahla isisombululo se-cellulose ether nge-iodine, ukuba umbala ujika uluhlaza okwesibhakabhaka, kunokuqwalaselwa ukuba isitashi songeziwe.
(3) Yongeza i-polyvinyl alcohol powder.Njengoko sonke siyazi, ixabiso lemarike yepolyvinyl alcohol powder efana ne-2488 kunye ne-1788 ihlala iphantsi kune-cellulose ether, kwaye ukuxuba i-polyvinyl alcohol powder kunokunciphisa iindleko ze-cellulose ether.
Indlela yokuchonga: Olu hlobo lwe-ether yeselulosi ludla ngokuba yigranular kwaye ixinene.Ichithwe ngokukhawuleza ngamanzi, khetha isisombululo ngentonga yeglasi, kuya kubakho into ecacileyo yentambo.
Isishwankathelo: Ngenxa yesakhiwo esikhethekileyo kunye namaqela, ukugcinwa kwamanzi kwe-cellulose ether ayikwazi ukutshintshwa ngezinye izinto.Kungakhathaliseki ukuba luhlobo luni lokuzalisa oluxutywe kuyo, ngokude nje luxutywe kwisixa esikhulu, ukugcinwa kwayo kwamanzi kuya kuncitshiswa kakhulu.Isixa se-HPMC esine-viscosity eqhelekileyo ye-10W kumdaka oqhelekileyo ngu-0.15 ~ 0.2 ‰, kwaye izinga lokugcinwa kwamanzi li> 88%.Ukopha kuyingozi ngakumbi.Ngoko ke, izinga lokugcinwa kwamanzi luphawu olubalulekileyo lokulinganisa umgangatho we-HPMC, nokuba ilungile okanye imbi, nje ukuba ifakwe kwi-mortar, iya kucaca ngokujonga.
Ixesha lokuposa: May-10-2023