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, iyakuchaphazela 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 kwimveliso 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 inokujongwa 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 lugranular kwaye luxinene. 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 yongezwa kumdaka, kuya kucaca ngokujonga.
Ixesha lokuposa: May-10-2023