Sida loo xukumo tayada Hydroxypropyl Methyl Cellulose HPMC?

(1). Farqiga u dhexeeya hydroxypropyl methylcellulose (HPMC) iyo hydroxypropyl methylcellulose saafi ah (HPMC)
1. Muuqashada: Hydroxypropyl methylcellulose saafi ah HPMC waxay u egtahay qalafsanaan waxayna leedahay cufnaanta bulk hooseeya, oo u dhaxaysa 0.3-0.4g/ml; Hydroxypropyl methylcellulose HPMC ayaa leh dheecaan ka wanaagsan oo dareemaya culeys, waxaana jira farqi weyn oo muuqaal ah oo ka yimid alaabta dhabta ah.
2. Xaaladda: Hydroxypropyl methylcellulose budada HPMC ee saafiga ah waxay ku hoos jirtaa mikroskoob ama muraayad weyn; halka hydroxypropyl methylcellulose HPMC si weyn loo arki karaa sida adkaha granular ama crystals hoos mikroskoob ama muraayad weynaynta.

3. Urta: Hydroxypropyl methylcellulose saafi ah HPMC ma urin karo urta ammonia, istaarijka iyo khamriga; Hydroxypropyl methylcellulose ba'an HPMC waxay urin kartaa dhammaan noocyada urta, xitaa haddii aysan dhadhan lahayn, waxay dareemi doontaa culus.
4. Xalka aqueous: saafi ah hydroxypropyl methylcellulose HPMC xal aqueous waa cad, gudbin iftiin sare, heerka haynta biyaha ≥ 97%; Hydroxypropyl methylcellulose HPMC ee xalinta biyaha waa turbid, iyo xadiga biyaha waa adag tahay in la gaaro 80%.

(2), haynta biyaha ee hydroxypropyl methylcellulose HPMC, kala saar faa'iidooyinka iyo khasaaraha:

Haysashada biyaha ee methyl cellulose ether ee xaaladaha heerkulka sare waa tilmaame muhiim ah oo lagu kala saaro tayada methyl cellulose ether. Waxyaabaha ay ka midka yihiin heerkulka hawada, heerkulka iyo xawaaraha cadaadiska dabaysha ayaa saameyn ku yeelan doona heerka isbedbedelka biyaha ee hoobiye sibidhka iyo alaabta gypsum-ku salaysan. Sidaa darteed, xilliyo kala duwan, waxaa jira xoogaa kala duwanaansho ah saameynta haynta biyaha ee alaabada leh qadar isku mid ah oo HPMC ah oo lagu daray. Dhismaha gaarka ah, saamaynta haynta biyaha ee slurry waxaa lagu hagaajin karaa iyadoo la kordhinayo ama la dhimayo qaddarka HPMC ee lagu daray. Wax soo saarka HPMC ee hydroxypropyl methylcellulose aad u fiican ayaa si wax ku ool ah u xallin kara dhibaatada haynta biyaha ee heerkulka sare.

methylcellulose tayo sare leh ayaa si isku mid ah oo wax ku ool ah loogu kala firdhi karaa hoobiye sibidhka iyo alaabta gypsum-ku salaysan, oo ku duub dhammaan qaybaha adag, oo samee filim qoynta, qoyaanka saldhigga ayaa si tartiib tartiib ah loo sii daayaa muddo dheer, iyo dareen-celinta fuuq-celinta. Maaddada gelled waxay hubisaa xoogga curaarta iyo xoogga cadaadiska ee walxaha. Hydroxypropyl methylcellulose HPMC oo tayo sare leh, labiskeedu aad ayuu u wanaagsan yahay, kooxaha methoxy iyo hydroxypropoxy ayaa si siman loogu qaybiyaa silsiladda unugyada unugyada, waxay kordhin kartaa oksijiinta hydroxyl iyo ether bonds Awoodda atamka si ay ula xiriirto biyaha si ay u sameeyaan bonds hydrogen. u beddela biyaha xorta ah biyo xidhxidhan, si wax ku ool ah u xakameeyo uumiga biyaha ee ay sababto heerkulka sare iyo gaaritaanka xajinta biyaha sare.
Sidaa darteed, dhismaha xagaaga ee heerkulka sare, si loo gaaro saameynta xajinta biyaha, waxaa lagama maarmaan ah in lagu daro alaab tayo sare leh oo HPMC ah oo ku filan tiro ku filan sida ku jirta caanaha, haddii kale, waxaa jiri doona fuuq-bax aan ku filneyn, hoos u dhac xoog leh, dildilaac ah, godan. iyo daadinta ay keento qalajinta xad dhaafka ah. dhibaatooyin, laakiin sidoo kale waxay kordhisaa dhibka dhismaha ee shaqaalaha. Marka heerkulku hoos u dhaco, cadadka biyaha HPMC ee lagu daray si tartiib tartiib ah ayaa loo dhimi karaa, waxaana la gaari karaa saameyn la mid ah haynta biyaha.

(3) Kala dirida hydroxypropyl methylcellulose HPMC

Dhinaca warshadaha dhismaha,Hydroxypropyl methylcellulose HPMCwaxaa inta badan lagu shubaa biyo dhexdhexaad ah, iyo badeecada HPMC waa la milmaan kaligiis si loo xukumo heerka kala dirida. Ka dib marka la dhigo biyo dhexdhexaad ah oo keliya, badeecada si dhakhso ah u xoqan iyada oo aan la kala firdhin waa badeecad aan lahayn daaweyn dusha sare ah; ka dib marka la dhigo biyo dhexdhexaad ah oo keliya, alaabta kala firdhi karta oo aan isku dhejin waa badeecad leh daaweyn dusha sare ah. Marka dusha sare ee hydroxypropyl methylcellulose HPMC ay kaligeed milanto, qaybteeda kaliya ayaa si degdeg ah u milmaysa waxayna samaysaa filim si degdeg ah, taas oo keenta in biyuhu aanay galin qaybo kale, taas oo keentay in ay sii xumaato iyo qallafsanaan, taas oo hadda loo yaqaan kala dirid qunyar ah ee alaabta suuqa.

Qaybaha alaabta HPMC ee lagu daaweeyay dusha sare ee hydroxypropyl methylcellulose, biyo dhexdhexaad ah, qaybo gaar ah ayaa lagu kala firdhi karaa iyada oo aan la kicin, laakiin viscosity alaabta isla markiiba ma noqon doonto. Ka dib marka la qooyo wakhti go'an, qaab dhismeedka kiimikada ee daaweynta dusha sare waa la burburiyaa, biyuhu waxay milmi karaan qaybaha HPMC. Waqtigan xaadirka ah, qaybaha alaabta si buuxda ayaa loo kala firdhiyey oo waxay nuugeen biyo ku filan, sidaas darteed alaabtu ma daadin doonto ama ma kicin doonto ka dib kala dirida. Xawaaraha fidinta iyo xawaaraha kala diriddu waxay ku xidhan yihiin heerka daawaynta dusha sare. Haddii daaweynta dusha sare ay yar tahay, xawaaraha kala firidhsanaanta ayaa yara gaabis ah oo xawaaruhu waa dhakhso; halka badeecada leh daawaynta dusha qoto dheer ay leedahay xawaare fidinta degdega ah iyo xawaare ku dheggan oo gaabis ah. Haddii aad rabto in aad samayso alaabtan taxanaha ah si dhakhso ah u milmi xaaladdan, waxaad hoos u dhigi kartaa qadar yar oo ah walxaha alkaline marka ay keligood kala diraan. Suuqa hadda jira waxaa badanaa loo tixraacaa alaab degdeg ah. Sifooyinka dusha lagu daaweeyay HPMC waa: in xal aqueous, qayb ka midba midka kale ku kala firdhi karaa, si deg deg ah u milmi karaa in gobolka alkaline, oo si tartiib ah u milmaan xaalad dhexdhexaad ah iyo acidic.

Astaamaha hydroxypropyl methylcellulose HPMC ee aan la daawayn waa: hal qayb ayaa si dhakhso ah u milmaana acidic, alkaline, iyo dawladaha dhexdhexaadka ah, laakiin ma kala firdhi karto qaybaha dareeraha ah, taas oo keenta isku-ururin iyo isku-darka. Hawlgalka dhabta ah, ka dib kala firdhinta jirka ee taxanahan alaabooyinka iyo walxaha adag sida budada caagga ah, sibidhka, ciid, iwm, heerka kala diriddu aad ayuu u dhakhso badan yahay, mana jiraan wax agglomeration ama agglomeration. Marka ay lagama maarmaan noqoto in si gaar ah loo milo badeecadaha HPMC, badeecadan taxanaha ah waa in si taxadar leh loo isticmaalo, maadaama ay kor u qaadi doonto oo ay isku hayn doonto. Haddii ay lagama maarmaan noqoto in si gooni gooni ah loo milo alaabta HPMC ee hydroxypropyl methylcellulose ee aan dusha lagu daawayn, waxay u baahan tahay in si isku mid ah loogu firdhiyo 95°C biyo kulul, ka dibna la qaboojiyo si ay u milanto.

Hawlgalka wax-soo-saarka dhabta ah, badeecooyinkan taxanaha ah ayaa inta badan milmaan ka dib marka lagu kala firdhiyo walxaha kale ee adag ee xaaladaha alkaline, iyo heerka kala diriddu kama duwana midka alaabta aan la daweyn. Waxa kale oo ay ku habboon tahay in loo isticmaalo alaabta keligood lagu milmay, iyada oo aan la duban ama burooyinkeeda. Qaabka gaarka ah ee alaabta waxaa lagu dooran karaa iyadoo loo eegayo heerka kala dirida ee loo baahan yahay dhismaha.
Inta lagu jiro habka dhismaha, haddii ay tahay dhoobada sibidhka ama gypsum-ku salaysan, intooda badani waa nidaamyada alkaline, iyo qadarka HPMC ee lagu daray waa mid aad u yar, kaas oo si siman u kala firdhi kara qaybahaas. Marka biyaha lagu daro, HPMC si dhakhso ah ayay u milmi doontaa.