Njengamanje, izinga le-hydroxypropyl methylcellulose yasekhaya liyahlukahluka kakhulu, futhi intengo iyahluka kakhulu, okwenza kube nzima kumakhasimende ukwenza ukukhetha okufanele.I-HPMC eguquliwe yenkampani efanayo yangaphandle ingumphumela weminyaka eminingi yocwaningo.Ukwengezwa kwezinto zokulandelela kungathuthukisa ukusebenza kokwakhiwa futhi kuthuthukise ukusebenza.Yiqiniso, izothinta ezinye izakhiwo, kodwa ngokuvamile iyasebenza;Inhloso kuphela yokwengeza ezinye izithako ukunciphisa izindleko, okuholela ekunciphiseni kakhulu ukugcinwa kwamanzi, ukubumbana nezinye izakhiwo zomkhiqizo, okuholela ezinkingeni eziningi zekhwalithi yokwakha.
Kunomehluko olandelayo phakathi kwe-HPMC emsulwa kanye ne-HPMC ehlanganisiwe:
1. I-HPMC ehlanzekile ibukeka iyi-fluffy futhi inenqwaba yenqwaba ephansi, esukela ku-0.3-0.4g/ml;I-HPMC ehlanganisiwe inoketshezi olungcono futhi izizwa isinda kakhulu, okuhlukile ngokusobala kumkhiqizo wangempela ngokubukeka.
2. Isixazululo samanzi se-HPMC esihlanzekile sicacile, ukudluliswa kokukhanya okuphezulu, kanye nezinga lokugcinwa kwamanzi ≥ 97%;Isixazululo samanzi se-HPMC esixubile siyaguqubala, futhi izinga lokugcinwa kwamanzi linzima ukufinyelela ku-80%.
3. I-HPMC ehlanzekile akufanele ihogele i-ammonia, isitashi notshwala;I-HPMC ephihliwe ngokuvamile ingahogela zonke izinhlobo zephunga, ngisho noma ingenambitheki, izozizwa isindayo.
4. Impushana ye-HPMC ehlanzekile ine-fibrous ngaphansi kwesibonakhulu noma ingilazi yokukhulisa;I-HPMC ephikisiwe ingabonwa njengeziqinile eziyimbudumbudu noma amakristalu ngaphansi kwesibonakhulu noma ingilazi yokukhulisa.
Ukuphakama okungenakunqotshwa okungu-200,000?
Ochwepheshe abaningi basekhaya kanye nezazi bashicilele amaphepha akholelwa ukuthi ukukhiqizwa kwe-HPMC kukhawulelwe ukuphepha nokubekwa uphawu kwemishini yasekhaya, inqubo ye-slurry kanye nokukhiqizwa kwengcindezi ephansi, futhi amabhizinisi ajwayelekile awakwazi ukukhiqiza imikhiqizo ene-viscosity engaphezu kuka-200,000.Ehlobo, akunakwenzeka ngisho nokukhiqiza imikhiqizo ene-viscosity engaphezu kuka-80,000.Bakholelwa ukuthi le mikhiqizo ebizwa nge-200,000 kumele kube yimikhiqizo yomgunyathi.
Izimpikiswano zochwepheshe azinangqondo.Ngokwesimo sokukhiqiza sasekhaya sangaphambilini, iziphetho ezingenhla zingafinyelelwa ngempela.
Isihluthulelo sokwandisa i-viscosity ye-HPMC ukuvalwa okuphezulu kwe-reactor kanye nokusabela kwengcindezi ephezulu kanye nezinto zokusetshenziswa zekhwalithi ephezulu.Ukungena komoya okuphezulu kuvimbela ukuwohloka kwe-cellulose nge-oxygen, futhi isimo sokusabela kokucindezela okuphezulu sikhuthaza ukungena kwe-etherification agent ku-cellulose futhi iqinisekisa ukufana komkhiqizo.
Inkomba eyisisekelo ye-200000cps hydroxypropyl methylcellulose:
2% isixazululo se-aqueous viscosity 200000cps
Ukuhlanzeka komkhiqizo ≥98%
Okuqukethwe kwe-Methoxy 19-24%
Okuqukethwe kwe-Hydroxypropoxy: 4-12%
200000cps izici ze-hydroxypropyl methylcellulose:
1. Ukugcinwa kwamanzi okuhle kakhulu kanye nezakhiwo zokuqina ukuze kuqinisekiswe ukugeleza okuphelele kwe-slurry.
2. Amandla okubopha okuphezulu kanye nomphumela obalulekile wokungenisa umoya, kuvimbela ngempumelelo ukushwabana nokuqhekeka.
3. Bambezela ukukhishwa kokushisa kosimende, bambezela isikhathi sokumisa, futhi ulawule isikhathi sokusebenza sikasimende.
4. Thuthukisa ukungaguquguquki kwamanzi odaka olumpontshwa, uthuthukise i-rheology, futhi uvimbele ukuhlukaniswa nokopha.
5. Imikhiqizo ekhethekile, ehloswe endaweni yokwakhiwa kokushisa okuphezulu ehlobo, ukuze kuqinisekiswe i-hydration ephumelelayo ye-slurry ngaphandle kwe-delamination.
Ngenxa yokugadwa kwemakethe okuxegayo, ukuncintisana embonini yodaka uya ngokuya ushuba.Ukuze bahlinzekele imakethe, abanye abathengisi baxube inani elikhulu lezinto ezibiza kancane ukuze bakhiqize i-cellulose ether eshibhile.Lapha, umhleli unesibopho sokukhumbuza amakhasimende ukuthi angalandeli amanani aphansi ngobumpumputhe, ukuze angakhohliswa Khohliswa, aholele ezingozini zobunjiniyela, futhi ekugcineni ukulahlekelwa kudlule izinzuzo.
Izindlela ezijwayelekile zokuphinga nezindlela zokuhlonza:
(1) Ukwengezwa kwe-amide ku-cellulose ether kungakhuphula ngokushesha i-viscosity yesisombululo se-cellulose ether, kwenze kungenzeki ukuyibona nge-viscometer.
Indlela yokuhlonza: Ngenxa yezici zama-amide, lolu hlobo lwesixazululo se-cellulose ether luvamise ukuba ne-stringing phenomenon, kodwa i-cellulose ether enhle ngeke ivele into enezintambo ngemva kokuhlakazwa, isixazululo sifana nejeli, okuthiwa inamathela kodwa ayixhunyiwe.
(2) Engeza isitashi ku-cellulose ether.Isitashi ngokuvamile asincibiliki emanzini, futhi ikhambi ngokuvamile alidluliseli kahle ukukhanya.
Indlela yokuhlonza: Yehlisa isixazululo se-cellulose ether nge-iodine, uma umbala uphenduka ube luhlaza okwesibhakabhaka, kungabhekwa ukuthi isitashi sengeziwe.
(3) Engeza i-polyvinyl alcohol powder.Njengoba sonke sazi, intengo yemakethe ye-polyvinyl alcohol powder efana ne-2488 ne-1788 ngokuvamile iphansi kune-cellulose ether, futhi ukuxuba i-polyvinyl alcohol powder kunganciphisa izindleko ze-cellulose ether.
Indlela yokuhlonza: Lolu hlobo lwe-cellulose ether ngokuvamile luyimbudumbudu futhi luminyene.Ihlakazeka ngokushesha ngamanzi, khetha isixazululo ngenduku yengilazi, kuzoba khona into esobala kakhulu yezintambo.
Isifinyezo: Ngenxa yesakhiwo sayo esikhethekile namaqembu, ukugcinwa kwamanzi kwe-cellulose ether akukwazi ukushintshwa ngezinye izinto.Kungakhathaliseki ukuthi hlobo luni lokugcwalisa oluxubene nalo, uma nje luxubene ngenani elikhulu, ukugcinwa kwalo kwamanzi kuzoncishiswa kakhulu.Inani le-HPMC eline-viscosity evamile ye-10W odakeni olujwayelekile ngu-0.15 ~ 0.2 ‰, futhi izinga lokugcinwa kwamanzi ngu->88%.Ukopha kubi kakhulu.Ngakho-ke, izinga lokugcinwa kwamanzi liyinkomba ebalulekile yokulinganisa izinga le-HPMC, kungakhathaliseki ukuthi lihle noma libi, inqobo nje uma lifakwa odakeni, lizocaca ngokubuka nje.
Isikhathi sokuthumela: May-10-2023