Hydroxypropyl methylrcelrelose HPMC waa nooc ka mid ah unugyada unugyada in-inic-ka ee ether ah. Si ka duwan kan loo yaqaan 'metyl methyl peylymeyl cell-ka' crether ', kama falcelin bir bir culus. Sababta oo ah saamiyada kaladuwan ee chisroxyl iyo hydroxypropyl ee ku jira hydroxypropylyl methylcelrellase iyo viscoxyl-ka kaladuwan, waxaa jira noocyo buluug ah oo heer sare ah wax qabadkeeda wax qabadkeeda, halka kan hooseeya Methoxyl nuxurka iyo waxyaabaha ku jira hydroxypropyl-ka weyn ayaa ku dhow in ay ka mid tahay hydroxypropyl bylulose. Si kastaba ha noqotee, nooc kasta oo kala duwan, in kasta oo kaliya oo ah in yar oo ah koox hydroxypropyl ama qayb yar oo ka mid ah methoxyl group-ka kooxda, waxaa jira kala duwanaansho weyn oo xaruuf ku ah xargaha xaaladaha dabiiciga ah ama heerkulka floccle ee xalka aqueolow.
(1) Qalabka fadhiga ee xaruustayaasha hydroxypropyl methylrcellesulose
① Hooylobypropyl methylcelrellase ee methroxrexyplopylypelrelolose dhab ahaantiina waxay leedahay nooc isku mid ah bylulose cellulose-ka cellulose wuxuu leeyahay astaamo isku-dhafan biyo qabow iyo isbuunyo biyo kulul. Si kastaba ha noqotee, sababtuna tahay kooxda hyroxypropyl, heerkulka gelitaanka ee biyaha kulul ayaa aad uga badan kan methyl bylulose. Tusaale ahaan, dib-u-dhaca ee hydroxypropylylrcelrcellesese xalka aqueous xaraashka shahaadada 'chiexyplopyl' ds = 0.73 iyo hydroxypropyl ms = 0.43 waa 500 mpa · 20 ° C 20 ° C oo ay ku xirnaan karaan 100 ° C. Midka methyl cellyl isla heerkulku waa qiyaastii 55 ° C. Sida loo xaliyo xalideeda biyaha, sidoo kale si weyn ayaa loo hagaajiyay. Tusaale ahaan, jajabka hyroxypropyl methylrcellellase (Qaabka grasanular 0.2 ~ 0.5mm at 20 ° C on 4% si fudud looga iibsan karo heerkulka qolka, si fudud ayaa loogu kacaa biyo aan qaboojin.
Iningroblubypropyl playlrcelrelose ee culeyska dabiiciga ah ee xargaha hydroxypropyl methylcelrellase ee '' '' 'methylcellosuse'. Alaabada ka sarreysa 2.1, ViscocosisySypropylylrcellerolose waxaa ku jira hydroxypropyl ms = 1.5 ~ 1.8, oo leh heerka methanol-ka ee methanol-ka, iyo dhallaanka, iyo biyo-mareenka . Waxay sidoo kale ku milmaysaa hydrocarbons chlorogarbons sida methylenene chloride iyo chloroform, iyo solvorm dabiici ah sida acetone, isopropanol iyo aalkolada diaktone iyo diacotol. Xaraashkeeda xabayadiisa dabiiciga ah ayaa ka fiican jilitaanka biyaha.
(2) Arimaha saameeya Viscosity of hydroxypropyl methylulolos metrosity placetypropylypellus, oo lagu cabiro 20 ° C oo leh 2% xalka aqueous ah ee heerka caadiga ah. Muuqaalka isku midka ah sheybadu wuxuu kordhiyaa kororka uruurinta. Alaabada leh miisaanka molikalalbalar ee kaladuwan ee isku-celceliska, sheyga leh miisaanka molika ee weyn ayaa leh viscosity. Xiriirkeeda uu ku leeyahay heerkulka wuxuu la mid yahay kan methyl bylulose. Markuu heerkulku kaco, muuqaalku wuxuu bilaabmayaa inuu yaraado, laakiin marka ay gaadho heerkul gaar ah,
Viscosity si lama filaan ah ayaa kor u kacda oo ay ku dhacdaa. Heerkulka jel ee waxyaabaha ka soo baxa viscosity-ka ayaa ka sarreeya. waa mid sare. Dhismaheeda gel kaliya maahan qaboojinta ether, laakiin sidoo kale waxay la xiriirtaa saamiga isku dhafka ah ee methoxyl group iyo kooxda hydroxypropyl iyo tirada guud ee heerka guud ee shahaadada. Waa in la ogaadaa in hydroxypropylylrelolose ay sidoo kale tahay pudoudoplastlantlastic, xalka ay deggan tahay heerkulka qolka iyada oo aan wax dhib ah ku qaadin viscosis-ka marka laga reebo nabaad-guurka.
(3) Dulqaadashada cusbada ee hydroxypropyl methylcelrelose maadaama hyroxypropylylulose methylcellcellcellus ', ma ahan mid kale oo ka mid ah kuwa kale ee kantaroolka ah, oo aan ka falcelinin ion-ka qarka ah oo kacsan oo ka hormarinaya xalka. Cusbada guud sida chloride, broside, fosfooraska, amooniyam, iwm. Ma saadaalin doono markii lagu daro xalka aqueous. Si kastaba ha noqotee, ku darista cusbada waxay leedahay xoogaa saameyn ah ku leh heerkulka floccation ee xalka aqueous. Markii ay kordhayso cusbadu waxay kordhaan, heerkulka gel ayaa hoos u dhacaya. Marka fiirsashada cusbadadu ka hooseyso barta loo yaqaan 'plocquation', viscosity of xalka ayaa kor u kacaya. Sidaa darteed, xaddi badan oo milix ah ayaa lagu daray. , codsi, waxay ku gaari kartaa saameyn qaro weyn oo dhaqaale ahaan. Sidaa darteed, codsiyada qaarkood, waxaa fiican in loo isticmaalo isku-darka unugyada unugyada unugyada unugyada iyo milix ee aad u sarreyso xalka sare ee xalka Ether si loo gaaro saameynta dhumucda.
(4) Hydroxypropylkylcellellase playlcelrellase acid iyo iska caabbinta Alkali Hydroxypropylyl Mykelcelrelolose guud ahaan waxay ku xasilloon tahay aashitada iyo alkalis, oo aaney saameyn ku lahayn tirada Ph 2 ~ 12. Waxay u adkeysan kartaa qaddarka qaddarka khafiifka ah, sida aashitada nooceeda ah, aashitada aashitada, acetic acid, acid-ka, sunta acid, acid-ka salka, iwm. Laakiin aashitada ku urursan, iwm. Alkalis sida soodhada cagaha, caustic potash iyo liin biyo ma leh wax saameyn ah kuma laha, laakiin waxyar ayey kordhin karaan qaboojinta xalka, ka dibna si tartiib tartiib ah ayey u yareeyaan.
(5) Niyad jabka hydroxypropylylulolose methroxsypelrelosus hydroxypropylypellellalose metmylcelrellose xalka waxaa lagu qasi karaa xeryo-bolmer-ka-biyo-ku-laabashada biyaha si loo noqdo isku-xirnaan iyo taam ah oo ku saabsan viscosity iyo transpress Xogtan polyverylen-ka waxaa ka mid ah polyvylen glycol, polyvinyl acetate, polysilicone, polymethylvinylsilomae, hydroxyetyl cell, iyo melulose cellyl. Xirmooyinka Moleculal ee Sare ee Dabiiciga ah sida ciridka ciridka, xanjada digaagga abu, xanjo Karada, iwm. Hydroxypropylylrcellellalose sidoo kale waxaa lagu qasi karaa mannitol ester-ka Mannitol ama sirtol acids-ka ama palmitol acid, iyo unugyadan waxaa loo isticmaali karaa sida biyo-xireennada metroxypropyl.
(6) Qulqulka unugyada biyaha-lagu durugo ee ku nool ALDEHYDES oo sameeya hydroxypropylylrelose methylcelrelose waxaa ka mid ah Forcipaldehyde, gelcinic aldexyde, iwm. wakiilka wax soo saarka warshadaha. Qaddarka wakiilka noocan oo kale ah ee iskutallaabta ee xalka ayaa ah 0.2% ~ 10% ee cufnaanta Etter, gaar ahaan 7% ~ 10%, tusaale ahaan, 3.3% ~ 6% gellical waa kuwa ugu habboon. Guud ahaan, daaweynta
Heerkulka waa 0 ~ 30 ℃, oo waqtiguna waa 1 ~ 120min. Fal-celinta iskutallaabta isku xirka ayaa loo baahan yahay in lagu qaado shuruudaha aashitada. Guud ahaan, xalka waxaa lagu daraa enganic aashito adag ama shey dabiici ah oo loo yaqaan 'phe-ka-qaadka Aashitada loo adeegsaday ayaa leh hydrochloric acid, sulfuric acid, fosfooraska, asip acid, acid acid, acid acid ama acid acid ama acetic acid ayaa lagu talinayaa, oo anshaxeedku waa fiican yahay. Asiidhka iyo aldehyde sidoo kale waa lagu dari karaa si isku mid ah si loogu oggolaado xalka si loo maro falcelin isgoys ah oo isku xira oo ka dhex jira xadka PH ee la doonayo. Fal-celintaan waxaa badanaa loo isticmaalaa geedi socodka daaweynta ugu dambeysa ee habka diyaarinta ee anshaxa qalliinka ee keli ah. Ka dib markii cluelose ether yahay mid aan yarayn, waa mid ku habboon in la isticmaalo
20 ~ 25 ℃ biyaha dhaqitaanka iyo nadiifinta. Marka sheyga la isticmaalo, walxaha alkaline waxaa lagu dari karaa xalka sheyga si loo habeeyo pH ee xalka xalka, iyo sheygu si dhakhso ah ayuu u milmi doonaa xalka. Qaabkan ayaa sidoo kale lagu dabaqi karaa daaweynta filimka ka dib markii unugyada unugyada loo yaqaan 'Ether Ether' loo sameeyo filim si looga dhigo filim aan ka dhigin.
(7) Cadaadiska enzyme ee hydroxypropylylrcellellase waa mid asal ahaan ka kooban unugyada, haddii ay sahlan tahay in ay ku dhacdo sheyga la dhameystirayo, marka qiimaha dhammeystirka ah marka qiimaha lagu beddelo 1, sidoo kale waxay ku liitaa enzymes, taas oo micnaheedu yahay in heerka badalka koox kasta ah uusan la mid noqon karin kooxda ku filan, oo ah in la cuno sonkorta, sida nafaqooyinka loo yaqaan 'microorgarinames' si loo nuugo. Sidaa darteed, haddii heerka ka beddelka ku beddelashada unugyada kanuga uu kordho, caabbinta nabaad-guurka nabaad-guurka unugyada unugyada unugyada laf-dhabarka ayaa sidoo kale kordha. Marka loo eego warbixinnada, xaaladaha la xakameeyay, natiijooyinka hydrolysis ee enzymes-ka, dib-u-dhaca haraaga ah ee hydroxypelrelouse (DS = 1.83) waa 7.3%, 1.66) waa 1.8%, 1.8%, iyo bydroxyetyl cellulose waa 1.7%. Waxaa lagu arki karaa in hyroxypropyl methylcelrelose uu leeyahay awood anti-enzyme oo xoog badan. Sidaa darteed, caabbinta enzyme ee wanaagsan ee hydroxypropylylrcellellase methylrcellellase, oo ay weheliso guryahooda wanaagsan, oo lagu daray guryaha, iyo filimka sameynta iyo filimka, iyo guud ahaan uma baahna in lagu daro waxyaabaha lagu keydiyo. Si kastaba ha noqotee, kaydinta muddada-dheer ee xalka ama faddaraynta suurtagalka ah ee ka soo baxa dibedda, waxyaabaha lagu keydiyo waxaa lagu dari karaa si ka hortag ah, xulashada waxaa lagu go'aamin karaa iyadoo loo eegayo shuruudaha ugu dambeeya ee xalka. Phenylmercuric acetate iyo manganese folorosalete waa kuwa wax ku ool ah oo wax ku ool ah, laakiin dhammaantood waxay leeyihiin sun sun ah, fiiro gaar ah waa in la siiyaa hawlgalka. Guud ahaan, 1 ~ 5mg ee phenylmersycess acetate waxaa lagu dari karaa xalka halkii litir ee qiyaasta.
(8) Waxqabadka hay'adda hydroxypropylkyl metylcelrellose filim hyroxypropyl methylcelrelosuse wuxuu leeyahay filimyo filim oo wanaagsan. Xalkeeda aqueous ama xalka dareeraha dabiiciga ah waxaa lagu daboolaa saxan galaas ah, oo waxay noqotaa midab la'aan iyo daahfurnaan ka dib qalajinta. Iyo filim adag. Waxay leedahay iska caabin qoyan oo wanaagsan oo weli ku adag heerkulka sare. Haddii lagu daro balli-ga hygroscopizer, dalaggiisa iyo dabacsanaantiisa waa la xoojin karaa. Marka laga hadlayo hagaajinta dabacsanaanta, balacayaasha sida Glycerin iyo Sortol ayaa ah kuwa ugu habboon. Guud ahaan, uruurinta xalka waa 2% ~ 3%, iyo qadarka baladizer-ka waa 10% ~ 20% oo ka mid ah celter celther. Haddii nuxurka caaga-balaastik uu aad u sarreeyo, hoos udhaca fuuq-baxa fuuq-baxa wuxuu ku dhici doonaa huurka badan. Awooda Tensile ee filimka leh
Calaamadda oo lagu daray waa mid aad uga weyn oo aan ahayn caaga -lajiye, waxayna ku kordheysaa kororka qaddarka lagu daray. Sida loogu talagalay hygroscopicity filimka, waxay sidoo kale kordhisaa kororka qaddarka balaala-yaqaanka.
Waqtiga Post: Novood-24-2022