Kampani ya Tiantai Cellulose imagwira ntchito pa kafukufuku, chitukuko, kupanga ndi kutsatsa malonda a hydroxypropyl methyl cellulose HPMC.Kuyera kwa HPMC hydroxypropyl methyl cellulose ndiye mutu wazinthu womwe umakhudzidwa kwambiri kwa opanga ndi ogwiritsa ntchito.Pano ife opanga hydroxypropyl methyl cellulose kuti tifotokoze mwatsatanetsatane, ndikuyembekeza kuwerenga kuti tithandizire.
Kutsimikiza kwa chiyero cha HPMC hydroxypropyl methyl cellulose
Mfundo yake
Hydroxypropyl methyl cellulose HPMC sisungunuka mu 80% ethanol.Pambuyo pakusungunuka ndi kutsuka nthawi zambiri, 80% ethanol yosungunuka mu chitsanzo imasiyanitsidwa ndikuchotsedwa kuti ipeze hydroxypropyl methyl cellulose HPMC.
Rchidwi
Pokhapokha zitanenedwa mwanjira ina, ma reagents okhawo omwe atsimikiziridwa kuti ndi owunikira komanso osungunula kapena opangidwa ndi madzi kapena madzi achiyero chofanana ndi omwe angagwiritsidwe ntchito pakuwunika.
95% ethanol (GB/T 679).
Mowa, 80% yankho, kuchepetsa 95% Mowa (E.2.1) 840mL ndi madzi 1L.
BMI (GB/T 12591).
Chida
Zida za labotale wamba
Kutentha kwa maginito oyambitsa, oyambitsa ndodo kutalika pafupifupi 3.5cm.
Sefa crucible, 40mL, pobowo 4.5μm ~ 9μm.
Diso lagalasi, φ10cm, dzenje lapakati.
Beaker, 400mL.
Nthawi zonse kutentha madzi kusamba.
Ovuni, imatha kuwongolera kutentha kwa 105 ℃ ± 2 ℃.
Pulogalamu
Molondola kuyeza chitsanzo 3g (zolondola 0.001g) mu beaker zonse kulemera, kuwonjezera 150mL 80% Mowa pa 60 ℃ ~ 65 ℃, ikani maginito ndodo mu maginito Kutentha stirrers, kuphimba mbale pamwamba, ikani thermometer pakati. dzenje, yatsani zotenthetsera, sinthani liwiro loyambitsa kuti musaponye, ndikusunga kutentha kwa 60 ℃ ~ 65 ℃.Kuyambitsa kwa mphindi 10.
Siyani kugwedeza, ikani beaker m'madzi osambira osasinthasintha a 60 ℃ ~ 65 ℃, imani njii kuti muthetse zinthu zosasungunuka, ndikutsanulira madzi amphamvu kwambiri momwe mungathere mu crucible yolemetsa yosasunthika.
Add 150mL 80% Mowa pa 60 ℃ ~ 65 ℃ kwa beaker, kubwereza pamwamba oyambitsa ndi kusefa ntchito, ndiyeno kusamba beaker, pamwamba mbale, oyambitsa ndodo ndi thermometer mosamala ndi 80% Mowa pa 60 ℃ ~ 65 ℃, kotero kuti zinthu zosasungunuka zimasamutsidwa kwathunthu ku crucible, ndikuwonjezera kutsuka zomwe zili mu crucible.Kuyamwa kuyenera kugwiritsidwa ntchito panthawiyi ndipo kuyanika kwa keke kuyenera kupewedwa.Ngati tinthu tadutsa mu fyuluta, kuyamwa kuyenera kuchepetsedwa.
Zindikirani: ziyenera kuwonetseredwa kuti sodium kolorayidi mu chitsanzo chatsukidwa ndi 80% Mowa.Ngati ndi kotheka, 0.1mol/L silver nitrate solution ndi 6mol/L nitric acid angagwiritsidwe ntchito kuwunika ngati kusefera kuli ndi ayoni a kloride.
Pa kutentha kwa firiji, zomwe zili mu crucible zidatsukidwa kawiri ndi 95% ethanol pa 50mL, ndipo potsiriza ndi ethyl mi20mL yotsuka kachiwiri.Nthawi yosefera isakhale yayitali kwambiri.Chophimbacho chinayikidwa mu beaker ndikutenthedwa pamadzi osambira mpaka palibe fungo la ethyl mi.
Zindikirani: kutsuka ndi ethyl mi ndikofunikira kuti muchotse kwathunthu ethanol ku chinthu chosasungunuka.Ngati ethanol sanachotsedwe kwathunthu musanayambe kuyanika uvuni, kuchotsa kwathunthu sikutheka panthawi yowumitsa uvuni.
The crucible ndi beaker anayikidwa mu uvuni pa 105 ℃ ± 2 ℃ kuyanika kwa 2h, kenako anasamutsidwa choumitsira kuti kuziziritsa kwa 30min ndi kulemera, ndi zouma kwa 1h ndi kuyeza kuziziritsa mpaka kusintha misa sanali oposa 0.003g. .Pakachulukirachulukira pakuyanika kwa 1h, misa yotsika kwambiri idzakhalapo.
Zotsatira zowerengedwa
Kuyera kwa HPMC hydroxypropyl methyl cellulose kunawerengedwa ngati gawo lalikulu P, ndipo mtengo wake unawonetsedwa ngati%
M1 - unyinji wa zouma insoluble nkhani, mu magalamu (g);
M0 - Misa ya gawo loyesera, mu magalamu (g);
W0 - Chinyezi ndi kusakhazikika kwachitsanzo, %.
Chiwerengero cha masamu a miyeso iwiri yofananira chimatsitsidwa kukhala gawo limodzi la decimal monga zotsatira zake.
Pkukonza
Kusiyanitsa kotheratu pakati pa miyeso iwiri yodziyimira payokha yomwe imapezeka pansi pazikhalidwe zobwerezabwereza sikuposa 0.3%, malinga ngati wamkulu kuposa 0.3% sadutsa 5%.
Nthawi yotumiza: Feb-14-2022