HPMC ee Skim jaakad

Hydroxypropyl methyl cellulose (HPMC) viscosity ee jaakada Skim?

Jawaab: Skim jaakad waa ok sida caadiga ah HPMC 100000cps, qaar ka dheer shuruudaha hoobiye, doonaya 150000cps awoodda isticmaalka. Waxaa intaa dheer, HPMC waa doorka ugu muhiimsan ee haynta biyaha, oo ay ku xigto dhumucdi. Skim jaakad , ilaa iyo inta haynta biyuhu ay wanaagsan yihiin, maqaarku waa hooseeyaa (7-80000), sidoo kale waa suurtogal, dabcan, maqaarku wuu ka weyn yahay, haynta biyaha ee qaraabada ah ayaa ka fiican, marka qulqulku ka badan yahay 100 kun, viscosity ee haynta biyuhu ma badna.

Maxay yihiin tilmaamayaasha farsamada ugu muhiimsan ee hydroxypropyl methyl cellulose (HPMC)?

Jawaab: Waxa ku jira Hydroxypropyl iyo viscosity, isticmaalayaasha badankoodu waxay daneeyaan labadan tilmaame. Waxa ku jira Hydroxypropyl waa sarreeyaa, haynta biyaha ayaa guud ahaan ka wanaagsan. Viscosity, haynta biyaha, qaraabo (laakiin aan dhammaystirnayn) ayaa sidoo kale ka fiican, iyo viscosity, hoobiye sibidhka ayaa ka fiican in la isticmaalo qaar ka mid ah.

Hydroxypropyl methyl cellulose (HPMC) waa maxay alaabta ceeriin ee ugu weyn?

Jawaab: hydroxypropyl methyl cellulose (HPMC) alaabta ceeriin ee ugu muhiimsan: suuf la safeeyey, chloromethane, propylene oxide, alaabta kale ee ceeriin, alkali kiniinka, acid, toluene, isopropyl khamriga iyo wixii la mid ah.

HPMC ee jaakad Skim ee codsiga, doorka ugu muhiimsan, haddii ay tahay kiimiko?

Jawaab: HPMC ee Skim coat , dhumucdiisuna, biyaha iyo dhismaha saddex door. Dhumucda: cellulose waa la dhumucdi karaa ganaax, si uu xalku u ahaado mid la mid ah kor iyo hoos doorka ka soo laadlaadda qulqulka. Haysashada biyaha: ka dhig jaakada Skim si tartiib ah u engejin, kaalshiyam cawl cawlan oo kaalshiyam ah oo ku jira falcelinta biyaha. Dhismaha: saliidda cellulose, waxay ka dhigi kartaa jaakad Skim waxay leedahay dhismo wanaagsan. HPMC kama qaybqaadato fal-celin kiimikaad, laakiin kaliya waxay ciyaartaa door taageero. Skim jaakad iyo biyaha, derbiga dusheeda, waa fal-celin kiimikaad, sababtoo ah abuurista walxaha cusub, darbiga jaakada Skim ayaa ka soo degaya derbiga, oo lagu shubay budo, ka dibna isticmaal, ma wanaagsana, sababtoo ah waxay samaysay walax cusub. (kaalshiyam carbonate). Qaybaha ugu muhiimsan ee budada calcium cawl waa: Ca (OH) 2, CaO iyo qadar yar oo CaCO3 isku dar ah, CaO+H2O=Ca(OH)2 - Ca(OH)2+CO2=CaCO3↓+H2O calcium cawl biyaha iyo hawada hoos tallaabada CO2, formation of calcium carbonate, iyo HPMC biyo kaliya, kaalshiyam cawl kalsiyum falcelin ka fiican, iyada u gaar ah ma ka qayb falcelin kasta.

HPMC waa ether-ka cellulose-ka aan-ionic-ka ahayn, markaa waa maxay non-ionic?

J: Guud ahaan marka loo hadlo, non-ions waa maaddooyin aan ionize biyaha. Ionization waa kala qaybinta elektrolyt-ka oo loo beddelo ion dhaqdhaqaaq lacag la'aan ah oo ku jira dareere gaar ah, sida biyaha ama khamriga. Tusaale ahaan, milixda aan cunno maalin kasta - sodium chloride (NaCl) waxay ku milantaa biyaha waxayna ionizes si ay u soo saarto sodium ions (Na+) oo dhaqdhaqaaqa bilaashka ah oo leh lacag togan iyo chloride ions (Cl) oo leh lacag taban. Taasi waa, HPMC ee biyaha ku jira uma kala baxaan ions-dareenka, laakiin waxay u jiraan sida molecules.

Waa maxay heerkulka gelation ee hydroxypropyl methyl cellulose ee la xidhiidha?

Jawaab: Heerkulka jel ee HPMC wuxuu la xiriiraa maadada methoxyl. Maaddaama methoxyl ay hooseyso, heerkulka jelka ayaa sarreeya.

Budada jaakad Skim iyo HPMC ma jiro xiriir?

Jawaab: Budada dhibicda skim jaakad inta badan iyo tayada kalsiyumka dambaska ayaa leh xiriir aad u weyn, HPMCna ma lahan xiriir aad u weyn. Kaalshiyamka hoose ee kalsiyumka cawl iyo saamiga aan habboonayn ee CaO iyo Ca(OH)2 ee kaalshiyam cawl ayaa sababi doona daadinta budada. Haddii uu jiro xiriir lala yeesho HPMC, markaa haynta biyaha liidata ee HPMC waxay sidoo kale sababi doontaa luminta budada.

Waa maxay farqiga u dhexeeya biyaha qabow ee milmaya iyo kululaynta hydroxypropyl methyl cellulose ee habka wax soo saarka?

– Jawaab:HPMC biyo qabow nooca xal degdeg ah ka dib daawaynta dusha glioxal, ku riday biyo qabow si degdeg ah u kala firdhiyey, laakiin aan runtii kala diri, viscosity kor, waa kala diri. Nooca heerkulbeegga dusha laguma daawayn glycoxal. Qadarka glycoxal waa weyn yahay, kala firdhisyadu waa dhakhso, laakiin maqaarku waa gaabis, qadarku waa yar yahay, liddi ku ah.

Waa maxay waxa ku saabsan hydroxypropyl methyl cellulose (HPMC) ee urta?

– Jawaab: HPMC oo lagu soo saaray habka dareeraha waxa uu ka samaysan yahay toluene iyo aalkolada isopropyl. Haddi dhaqiddu aysan aad u fiicneyn, waxaa jiri doona xoogaa dhadhamin ah.

Isticmaalka kala duwan, sida loo doorto hydroxypropyl methyl cellulose (HPMC) ku habboon?

- jawaab: ku caajiso codsiga budada ilmaha: shuruudu waa liidata, viscosity 100000, ok, waa muhiim in la ilaaliyo biyaha si loogu dhawaado. Codsiga hoobiye: shuruudaha sare, shuruudaha viscosity sare, 150000 si ay u fiicnaadaan. Codsiga xabagta: baahida loo qabo alaabta degdega ah, viscosity sare.

Waa maxay magac kale oo loogu talagalay hydroxypropyl methyl cellulose?

– JAWAAB: Hydroxypropyl MethylCellulose, Loo soo gaabiyo sida HPMC ama MHPC, ama Hydroxypropyl Methyl Cellulose; Cellulose hydroxypropyl methyl ether; Hypromellose, Cellulose, 2-hydroxypropyl methyl Cellulose ether.

HPMC ee codsiga Skim coat, waa maxay sababta Skim coat xumbo?

Jawaab: HPMC ee Skim coat , dhumucdiisuna, biyaha iyo dhismaha saddex door. Aan ka qayb qaadan wax falcelin ah. Sababaha xumbo: 1, biyo badan. 2, hoose ma qalalan, dusha sare ee lakabka xoqidda, sidoo kale ay fududahay in ay finan.

Darbiga gudaha iyo kan dibadda Skim jaakad caanaha?

- jawaab: gidaarka gudaha Skim jaakad: calcium 800KG cawl calcium 150KG (starch ether, cagaar saafi ah, peng runtu, citric acid, polyacrylamide si habboon loogu dari karaa)

Darbiga dibadda Skim Coat: sibidh 350KG calcium 500KG quartz ciid 150KG budada cinjirka ah 8-12kg cellulose ether 3KG istaarijka ether 0.5kg alwaax fiber 2KG

Waa maxay faraqa u dhexeeya HPMC iyo MC?

Jawaab: MC waa methyl cellulose, kaas oo ka samaysan ether cellulose iyada oo loo marayo falcelin taxane ah oo leh methane chloride sida wakiilka etherifying ka dib markii suuf la safeeyey lagu daaweeyay alkali. Guud ahaan, heerka beddelku waa 1.6 ~ 2.0, iyo milmayntu waxay ku kala duwan tahay heerka beddelka. Waxaa iska leh ether nonionic cellulose.

(1) Haysashada biyaha ee methyl cellulose waxay kuxirantahay qadarkeeda dheeriga ah, viscosity, ganaaxyada walxaha iyo heerka kala dirida. Guud ahaan ku dar qadar weyn, ganaax yar, viscosity, xajinta biyaha ayaa sarreeya. Waxaa ka mid ah, qadarka wax lagu daro ayaa saameyn weyn ku leh haynta biyaha, iyo viscosity-ku maaha mid u dhigma haynta biyaha. Heerka kala diriddu waxay inta badan ku xiran tahay heerka wax ka beddelka dusha sare iyo ganaaxyada walxaha unugyada cellulose. Inta kor ku xusan dhowr ethers cellulose, methyl cellulose iyo hydroxypropyl methyl cellulose biyaha haynta heerka sare waa.

(2) Methyl cellulose waxay ku milmaysaa biyo qabow, kuwaas oo ay adag tahay in lagu milo biyo kulul. Xalka aqueous waa mid aad u deggan gudaha pH = 3 ~ 12. Waxay leedahay ku habboonaanta istaarijka, xanjo guanidine iyo waxyaabo badan oo surfactants ah. Gelation-ku wuxuu dhacaa marka heerkulku gaaro heerkulka gelation.

(3) Isbeddelka heerkulku wuxuu si dhab ah u saameyn doonaa heerka haynta biyaha ee methyl cellulose. Guud ahaan, marka uu heerkulku sarreeyo, way ka sii xumaanaysaa haynta biyaha. Haddii heerkulka hoobiye uu ka sarreeyo 40 ℃, haynta biyaha ee methyl cellulose ayaa si weyn uga sii dari doonta, taas oo si dhab ah u saameynaysa dhismaha hoobiye.

(4) Methyl cellulose waxay saameyn muuqata ku leedahay dhismaha iyo ku dhegganaanta hoobiyeyaasha. "Adhesion" halkan waxaa loola jeedaa ku dhejinta uu dareemay shaqaaluhu inta u dhaxaysa qalabka iyo darbiga derbiga, taas oo ah caabbinta dhogorta ee hoobiye. Adhesion waa weyn yahay, caabbinta dhogorta ee hoobiye waa weyn tahay, xoogga looga baahan yahay shaqaalaha habka isticmaalka ayaa sidoo kale weyn, iyo dhismaha hoobiye waa liidata. Badeecooyinka ether cellulose, adhesion ee methyl cellulose waa heer dhexdhexaad ah.

HPMC hydroxypropyl methyl cellulose, waxaa lagu safeeyey by suuf ka dib daawaynta alkali, la propylene oxide iyo chloromethane sida wakiilka etherifying, iyada oo taxane falcelin ah oo ka samaysan ether non-ionic cellulose qasan. Darajada beddelka guud ahaan waa 1.2 ~ 2.0. Sifooyinkeedu waxay ku kala duwan yihiin saamiga methoxy iyo ka kooban hydroxypropyl.

(1) Hydroxypropyl methyl cellulose si fudud ayay ugu milmi kartaa biyo qabow, kuwaas oo ay adagtahay in lagu milmo biyo kulul. Si kastaba ha ahaatee, heerkulkeeda gelation ee biyaha kulul ayaa si cad uga sarreeya kan methyl cellulose. milanka methyl cellulose ee biyaha qabow ayaa sidoo kale si weyn loo hagaajiyay.

(2) Viscosity of hydroxypropyl methyl cellulose waxay la xiriirtaa miisaankeeda kelli, iyo marka uu sareeyo miisaanka kelliga ah, waa uu sarreeyaa viscosity. Heerkulka ayaa sidoo kale saameeya viscosity. Viscosity hoos ayuu u dhacaa marka heerkulku kordho. Laakiin viscosity ay saamayn heerkulka sare ayaa ka hooseeya kan methyl cellulose. Xalku wuu xasilloon yahay marka lagu kaydiyo heerkulka qolka.

(3) Hydroxypropyl methyl cellulose waxay ku xasilloon tahay aashitada iyo saldhigga, iyo xalkeeda aqueous waa mid aad u deggan inta u dhexeysa pH = 2 ~ 12. Caustic soodhaha iyo biyaha lime waxay saameyn yar ku leeyihiin hantidooda, laakiin alkali waxay dedejin kartaa heerka kala diristeeda waxayna wanaajin kartaa viscosity. Hydroxypropyl methyl cellulose waxay ku xasilloon tahay cusbada guud, laakiin marka xoogga milixdu uu sarreeyo, viscosity of hydroxypropyl methyl cellulose xal u janjeera inuu kordhiyo.

(4) Haysashada biyaha ee hydroxypropyl methyl cellulose waxay ku xiran tahay qiyaasta iyo viscosity, iyo heerka haynta biyaha ee hydroxypropyl methyl cellulose ayaa ka sarreeya kan methyl cellulose isla qiyaasta.

(5) Hydroxypropyl methyl cellulose waxaa lagu qasi karaa xeryahooda polymer-ka biyaha-milmi kara si ay u noqdaan labbis, xalka viscosity sare. Sida khamriga polyvinyl, eter istaarijka, xabagta khudradda iyo wixii la mid ah.

(6) Ku-dhejinta hydroxypropyl methyl cellulose ee dhismaha hoobiye ayaa ka sarreeya kan methyl cellulose.

(7) Hydroxypropyl methyl cellulose waxay leedahay iska caabin enzyme ka wanaagsan kan methyl cellulose, iyo suurtagalnimada xaalufinta enzymka xalkeedu waa ka hooseeyaa kan methyl cellulose.

Maxaa habboon in fiiro gaar ah loo yeesho codsiga dhabta ah ee ku saabsan xidhiidhka ka dhexeeya viscosity iyo heerkulka HPMC?

Jawaab: Viscosity-ka HPMC waxa uu la siman yahay heerkulka, taas oo ah in la yidhaahdo, viscosity-ku wuxuu kordhiyaa hoos u dhaca heerkulka. Marka aan ka hadalno viscosity alaabta, waxaan ka hadlaynaa viscosity of 2% ee alaabta ku jirta biyaha 20 darajo Celsius.

Codsiga wax ku oolka ah, meelaha leh farqiga heerkulka weyn ee u dhexeeya xagaaga iyo jiilaalka, waa in la ogaadaa in lagu talinayaa in la isticmaalo viscosity yara hooseeya xilliga jiilaalka, taas oo aad ugu habboon dhismaha. Haddii kale, marka heerkulku hooseeyo, viscosity of cellulose ayaa kordhi doona, iyo marka xoqidda, dareenku wuxuu noqon doonaa mid culus.

Viscosity dhexdhexaad ah: 75000-100000 inta badan loo isticmaalo putty

Sababta: Haysashada biyaha wanaagsan

viscosity sare: HPMC 150000-200000 waxaa inta badan loo isticmaalaa polystyrene insulation insulation hoobiye koollada budada ah iyo vitrified kuul insulation hoobiye.

Sababta: viscosity sare, hoobiye ma fududa in la tuuro, qulqulka qulqulaya, hagaajinta dhismaha.

Laakiin guud ahaan marka la hadlo, viscosity sare, si fiican u haynta biyaha, sidaas darteed warshado badan oo qalalan qalalan, iyadoo la tixgelinayo kharashka, isticmaalaan viscosity dhexdhexaad ah HPMC cellulose (75000-100000) si ay u bedelaan dhexdhexaad ah iyo viscosity hooseeyo HPMC cellulose (20000-40000) si loo yareeyo qadarka wax lagu daro.