Kampani ya Tiantai Cellulose imagwira ntchito yofufuza, kupanga, kupanga ndi kugulitsa zinthu za hydroxypropyl methyl cellulose za HPMC. Kuyera kwa HPMC hydroxypropyl methyl cellulose ndiye nkhani yofunika kwambiri kwa opanga ndi ogwiritsa ntchito. Apa ife opanga hydroxypropyl methyl cellulose kuti tipereke mawu oyamba mwatsatanetsatane, ndikuyembekeza kuwerenga kuti ndikuthandizeni.
Kutsimikiza kwa chiyero cha HPMC hydroxypropyl methyl cellulose
Mfundoyi
Hydroxypropyl methyl cellulose HPMC sisungunuka mu 80% ethanol. Pambuyo posungunuka ndi kutsukidwa nthawi zambiri, 80% ethanol yosungunuka mu chitsanzocho imalekanitsidwa ndikuchotsedwa kuti ipeze hydroxypropyl methyl cellulose HPMC yoyera.
Rwothandizira
Pokhapokha ngati panenedwa zina, ma reagents okha omwe atsimikiziridwa kuti ndi madzi oyera komanso osungunuka kapena oyeretsedwa kapena madzi oyera ofanana ndi omwe ayenera kugwiritsidwa ntchito pofufuza.
95% ethanol (GB/T 679).
Ethanol, yankho la 80%, sakanizani 95% ethanol (E.2.1) 840mL ndi madzi mpaka 1L.
BMI (GB/T 12591).
Chidacho
Zida zodziwika bwino za labotale
Chosakaniza chotenthetsera cha maginito, kutalika kwa ndodo yosakaniza ndi pafupifupi 3.5cm.
Chosefera choviikidwa mu poto, 40mL, kutsegula poto 4.5μm ~ 9μm.
Mbale ya pamwamba pa galasi, φ10cm, dzenje lapakati.
Chidebe cha madzi, 400 ml.
Madzi osambira okhala ndi kutentha kosalekeza.
Uvuni, imatha kuwongolera kutentha pa 105℃±2℃.
Pulogalamuyo
Yesani molondola chitsanzo cha 3g (cholondola mpaka 0.001g) mu beaker yolemera yosasintha, onjezerani 150mL 80% ethanol pa 60℃ ~ 65℃, ikani ndodo ya magnetic rod mu magnetic heating stirrers, phimbani mbale pamwamba pake, ikani thermometer m'bowo lapakati, yatsani heater stirrers, sinthani liwiro loyambitsa kuti musathire madzi, ndikusunga kutentha pa 60℃ ~ 65℃. Sakanizani kwa mphindi 10.
Siyani kusakaniza, ikani beaker mu bafa la madzi lotentha losasintha la 60℃ ~ 65℃, imani bwino kuti zinthu zosasungunuka zikhazikike, ndikutsanulira madzi ochulukirapo momwe mungathere mu crucible yosasintha.
Onjezani 150mL 80% ethanol pa 60℃ ~ 65℃ ku beaker, bwerezani ntchito zosakaniza ndi kusefa zomwe zili pamwambapa, kenako tsukani beaker, mbale yophikira pamwamba, ndodo yosakaniza ndi thermometer mosamala ndi 80% ethanol pa 60℃ ~ 65℃, kuti zinthu zosasungunuka zisamutsire kwathunthu ku crucible, ndikutsukanso zomwe zili mu crucible. Kutulutsa kuyenera kugwiritsidwa ntchito panthawiyi ndipo kuumitsa keke kuyenera kupewedwa. Ngati tinthu tating'onoting'ono timadutsa mu fyuluta, kuyamwa kuyenera kuchepetsedwa.
Dziwani: ziyenera kutsimikizika kuti sodium chloride yomwe ili mu chitsanzo yatsukidwa kwathunthu ndi 80% ethanol. Ngati kuli kofunikira, yankho la siliva nitrate la 0.1mol/L ndi 6mol/L nitric acid zingagwiritsidwe ntchito kuti muwone ngati filtrate ili ndi ma chloride ions.
Pa kutentha kwa chipinda, zinthu zomwe zili mu mbiya zinatsukidwa kawiri ndi 95% ethanol pa 50mL, ndipo pomaliza ndi ethyl mi20mL kuti zitsukidwe kachiwiri. Nthawi yosefera siyenera kukhala yayitali kwambiri. Mbaya inayikidwa mu beaker ndikutenthedwa pa bafa la nthunzi mpaka fungo la ethyl mi litapezeka.
Dziwani: kutsuka ndi ethyl mi ndikofunikira kuti muchotse ethanol yonse mu chinthu chosasungunuka. Ngati ethanol sinachotsedwe kwathunthu musanayambe kuumitsa uvuni, sizingatheke kuchotsa kwathunthu mu uvuni mukaumitsa.
Chotsukira ndi chotsukiracho zinayikidwa mu uvuni pa kutentha kwa 105℃±2℃ kuti ziume kwa maola awiri, kenako zinasamutsidwira ku chowumitsira kuti zizizire kwa mphindi 30 ndipo zinayesedwa, kenako zinaumitsidwa kwa ola limodzi ndipo zinayesedwa kuti zizizire mpaka kusintha kwa kulemera sikunapitirire 0.003g. Ngati kulemera kwawonjezeka panthawi yowuma kwa ola limodzi, kulemera kochepa kwambiri kudzapambana.
Zotsatira zake zinawerengedwa
Kuyera kwa HPMC hydroxypropyl methyl cellulose kunawerengedwa ngati gawo lalikulu P, ndipo mtengo wake unafotokozedwa ngati %
M1 - unyinji wa zinthu zouma zosasungunuka, mu magalamu (g);
M0 — Kulemera kwa gawo loyesera, mu magalamu (g);
W0 — Chinyezi ndi kuchuluka kwa madzi osasunthika kwa chitsanzo, %.
Chiwerengero chapakati cha masamu cha miyeso iwiri yofanana chimachepetsedwa kufika pa mfundo imodzi ya decimal monga zotsatira za muyeso.
Pkulondola
Kusiyana kwakukulu pakati pa miyeso iwiri yodziyimira payokha yomwe yapezeka pansi pa mikhalidwe yobwerezabwereza sikupitirira 0.3%, bola ngati yoposa 0.3% isapitirire 5%.
Nthawi yotumizira: Feb-14-2022