Kamfanin Tiantai Cellulose ya ƙware a cikin bincike, haɓakawa, samarwa da haɓaka tallace-tallace na samfuran HPMC na hydroxypropyl methyl cellulose.Tsaftar HPMC hydroxypropyl methyl cellulose shine batun samfurin da ya fi damuwa ga masana'antun da masu amfani.Anan mu masana'antun hydroxypropyl methyl cellulose don ba da cikakken gabatarwa, Ina fatan karantawa don taimakawa.
Ƙaddamar da tsarki na HPMC hydroxypropyl methyl cellulose
Ka'idar
Hydroxypropyl methyl cellulose HPMC ba shi da narkewa a cikin 80% ethanol.Bayan narkar da kuma wanke sau da yawa, 80% ethanol narkar da a cikin samfurin an rabu da kuma cire don samun m hydroxypropyl methyl cellulose HPMC.
Rm
Sai dai in an faɗi in ba haka ba, kawai reagents da aka tabbatar suna da tsaftataccen tsafta da tsaftataccen ruwa ko ruwa mai kama da tsabta za a yi amfani da su a cikin bincike.
95% ethanol (GB/T 679).
Ethanol, 80% bayani, tsarma 95% ethanol (E.2.1) 840mL da ruwa zuwa 1L.
BMI (GB/T 12591).
Kayan aiki
Kayan aikin dakin gwaje-gwaje na gama gari
Magnetic dumama mai motsawa, tsawon sanda mai motsawa kusan 3.5cm.
Filtration crucible, 40ml, budewa 4.5μm ~ 9μm.
Gilashin saman tasa, φ10cm, rami na tsakiya.
Ruwa, 400 ml.
Ruwan wanka mai zafin jiki akai-akai.
Tanda, iya sarrafa zafin jiki a 105 ℃ ± 2 ℃.
Shirin
Daidai auna samfurin 3g (daidai zuwa 0.001g) a cikin beaker mai nauyi akai-akai, ƙara 150mL 80% ethanol a 60 ℃ ~ 65 ℃, sanya sandar maganadisu cikin injin dumama maganadisu, rufe tasa saman, saka ma'aunin zafi da sanyio a tsakiyar. rami, kunna dumama stirrers, daidaita motsawa gudun don kauce wa splashing, da kuma kula da zazzabi a 60 ℃ ~ 65 ℃.Ana motsawa don minti 10.
Dakatar da motsawa, sanya beaker a cikin ruwan wanka mai zafin jiki akai-akai na 60 ℃ ~ 65 ℃, tsayawa har yanzu don daidaita al'amuran da ba za a iya narkewa ba, kuma a zubar da ruwa mai ƙarfi gaba ɗaya kamar yadda zai yiwu a cikin madaidaicin ma'aunin nauyi.
Ƙara 150ml 80% ethanol a 60 ℃ ~ 65 ℃ zuwa beaker, maimaita abin da ke sama yana motsawa da tacewa, sannan a wanke beaker, saman tasa, sandar motsawa da thermometer a hankali tare da 80% ethanol a 60 ℃ ~ 65 ℃, don haka al'amarin da ba zai iya narkewa gaba ɗaya yana canjawa zuwa ga ƙwanƙwasa, kuma ya ƙara wanke abin da ke cikin kullun.Ya kamata a yi amfani da tsotsa yayin wannan aiki kuma a guji bushewar biredi.Idan barbashi sun ratsa cikin tacewa, yakamata a rage tsotsa.
Lura: ya kamata a tabbatar da cewa sodium chloride a cikin samfurin an wanke shi gaba daya da 80% ethanol.Idan ya cancanta, ana iya amfani da maganin nitrate na azurfa 0.1mol/L da 6mol/L nitric acid don bincika ko tacewa ya ƙunshi ions chloride.
A cikin zafin jiki, an wanke abin da ke cikin crucible sau biyu tare da 95% ethanol a 50mL, kuma a ƙarshe tare da ethyl mi20mL don wanka na biyu.Lokacin tacewa bai kamata yayi tsayi da yawa ba.An sanya crucible a cikin baƙar fata kuma a yi zafi a kan wanka mai tururi har sai an sami warin ethyl mi.
Lura: wankewa da ethyl mi wajibi ne don cire ethanol gaba daya daga abin da ba ya narkewa.Idan ba a cire ethanol gaba daya ba kafin bushewar tanda, cirewa gaba daya ba zai yiwu ba yayin bushewar tanda.
An sanya crucible da beaker a cikin tanda a 105 ℃ ± 2 ℃ don bushewa na 2h, sannan a tura shi zuwa na'urar bushewa don sanyaya don 30min kuma a auna, sannan a bushe don 1h kuma a auna don sanyaya har sai canjin taro bai wuce 0.003g ba. .Idan akwai karuwa mai yawa a lokacin bushewa na 1h, mafi ƙasƙanci da aka lura za a yi nasara.
An ƙididdige sakamakon
An ƙididdige tsarkin HPMC hydroxypropyl methyl cellulose azaman babban juzu'i na P, kuma an bayyana ƙimar a matsayin %
M1 - taro na busassun kwayoyin da ba a iya narkewa, a cikin grams (g);
M0 - Mass na ɓangaren gwajin, a cikin grams (g);
W0 - Danshi da m abun ciki na samfurin,%.
Ma'anar lissafin ma'aunin ma'auni guda biyu an rage shi zuwa maki ɗaya na ƙima a matsayin sakamakon auna.
Pkoma baya
Cikakken bambanci tsakanin ma'auni masu zaman kansu guda biyu da aka samu a ƙarƙashin yanayin maimaitawa bai fi 0.3% ba, idan har sama da 0.3% bai wuce 5%.
Lokacin aikawa: Fabrairu-14-2022