Inkampani ye-Tiantai Cellulose igxile kuphando, uphuhliso, ukuveliswa kunye nokukhuthazwa kweentengiso ze-hydroxypropyl methyl cellulose iimveliso ze-HPMC.Ukucoceka kwe-HPMC hydroxypropyl methyl cellulose sesona sihloko sichaphazelekayo semveliso kubavelisi kunye nabasebenzisi.Apha thina hydroxypropyl methyl cellulose abavelisi ukunika intshayelelo eneenkcukacha, ndiyathemba ukufunda ukunceda.
Ukumiselwa kobunyulu be-HPMC hydroxypropyl methyl cellulose
Umgaqo
IHydroxypropyl methyl cellulose HPMC ayinyibiliki kwi-ethanol engama-80%.Emva kokuchithwa kunye nokuhlamba amaxesha amaninzi, i-80% ye-ethanol echithwe kwisampulu iyahlukana kwaye isuswe ukufumana i-hydroxypropyl methyl cellulose ecocekileyo ye-HPMC.
Renomdla
Ngaphandle kokuba kuchazwe ngenye indlela, kuphela ii-reagents eziqinisekisiweyo ukuba zihlalutye kwaye zihlanjululwe ngamanzi ahlambulukileyo okanye ahlanjululweyo okanye amanzi ahlambulukileyo aya kusetyenziswa kuhlalutyo.
I-95% ye-ethanol (GB/T 679).
I-Ethanol, isisombululo se-80%, i-dilute 95% ethanol (E.2.1) 840mL ngamanzi ukuya kwi-1L.
I-BMI (GB/T 12591).
Isixhobo
Izixhobo eziqhelekileyo zebhubhoratri
Imagnethi yokufudumeza i-stirrer, ubude bentonga eshukumisayo malunga ne-3.5cm.
I-crucible yokucoca, i-40mL, i-aperture 4.5μm ~ 9μm.
Isitya somphezulu weglasi, φ10cm, umngxuma osembindini.
Ibeaker, 400mL.
Ukufudumala rhoqo ukuhlamba amanzi.
I-oveni, inokulawula ubushushu kwi-105℃±2℃.
Inkqubo
Ngokuchanekileyo ulinganise isampula ye-3g (echanekile ukuya kwi-0.001g) kwibhekile yobunzima obungaguqukiyo, yongeza i-150mL 80% ye-ethanol kwi-60 ℃ ~ 65 ℃, faka intonga yemagnethi kwi-magnetic ukufudumeza ukufudumeza, gubungela isitya somphezulu, ufake i-thermometer embindini. umngxuma, vula izivuseleli zokufudumeza, lungisa isantya esishukumisayo ukunqanda ukuchaphaza, kwaye ugcine ubushushu bukwi-60℃ ~ 65℃.Ukuvuselela i-10 min.
Yeka ukushukumisa, beka ibhekile kwindawo yokuhlambela yamanzi obushushu obungaguqukiyo obuyi-60℃ ~ 65℃, yima ngxi ukulungisa into enganyibilikiyo, kwaye ugalele ulwelo olunamandla amakhulu kangangoko kunokwenzeka kwicrucible yobunzima bokucoca.
Yongeza i-ethanol eyi-150mL 80% ku-60℃ ~ 65℃ kwibeaker, phinda olu sebenziso lungentla luvuselelayo kunye nokucoca, emva koko uhlambe i-beaker, isitya esingaphezulu, intonga eshukumisayo kunye nethermometer ngononophelo nge-80% ethanol ku-60℃ ~ 65℃, ukuze into engenakunyibilika idluliselwe ngokupheleleyo kwi-crucible, kwaye uhlambe ngakumbi imixholo ye-crucible.Ukufunxa kufuneka kusetyenziswe ngexesha lo msebenzi kwaye ukomiswa kwekhekhe kufuneka kugwenywe.Ukuba amasuntswana adlula kwisihluzi, ukufunxa kufuneka kuthotywe.
Qaphela: kufuneka kuqinisekiswe ukuba i-sodium chloride kwisampuli ihlanjwe ngokupheleleyo yi-80% ye-ethanol.Ukuba kuyimfuneko, i-0.1mol / L isisombululo se-nitrate yesilivere kunye ne-6mol / L ye-nitric acid ingasetyenziselwa ukujonga ukuba i-filtrate iqukethe i-chloride ion.
Kwiqondo lokushisa lokushisa, iziqulatho ze-crucible zihlanjwe kabini nge-95% ethanol kwi-50mL, kwaye ekugqibeleni nge-ethyl mi20mL yokuhlamba okwesibini.Ixesha lokuhluza akufuneki libe lide kakhulu.I-crucible yafakwa kwi-beaker kwaye yafudumeza kwibhafu yomphunga de akukho vumba le-ethyl mi elifunyenweyo.
Qaphela: ukuhlamba nge-ethyl mi kuyimfuneko ukususa ngokupheleleyo i-ethanol kwi-insoluble substance.Ukuba i-ethanol ayisuswanga ngokupheleleyo ngaphambi kokumisa i-oven, ukususa ngokupheleleyo akunakwenzeka ngexesha lokumisa i-oven.
I-crucible kunye ne-beaker zafakwa kwi-oven kwi-105 ℃ ± 2 ℃ yokomisa i-2h, emva koko idluliselwe kwi-dryer ukuze ipholise i-30min kwaye ilinganiswe, kwaye yomiswe nge-1h kwaye ilinganiswe ukupholisa de utshintsho lobunzima alukho ngaphezu kwe-0.003g .Kwimeko yokwanda kobunzima ngexesha lokumisa kwe-1h, obona bunzima bujongwayo buphantsi buya kubakhona.
Iziphumo zibaliwe
Ukucoceka kwe-HPMC hydroxypropyl methyl cellulose kubalwe njengeqhezu lobunzima P, kwaye ixabiso libonakaliswe njenge-%
I-M1 - ubunzima bezinto ezomileyo ezingenayo i-insoluble, kwiigram (g);
I-M0 - Ubuninzi becandelo lokuvavanya, kwiigram (g);
I-W0 - Umswakama kunye nomxholo oguqukayo wesampuli,%.
Ixabiso lentsingiselo ye-arithmetic yemilinganiselo emibini ehambelanayo iyancitshiswa ukuya kwindawo enye yedesimali njengesiphumo somlinganiselo.
Pulungiso
Umahluko opheleleyo phakathi kwemilinganiselo emibini ezimeleyo efunyenwe phantsi kweemeko zokuphindaphinda awukho mkhulu kune-0.3%, ngaphandle kokuba ngaphezulu kwe-0.3% ayidluli kwi-5%.
Ixesha lokuposa: Feb-14-2022