I-HPMC (Hydroxypropyl methylcelcelcelsulose)I-polymer yekhemikhali ye-polymer isetyenziswa rhoqo kwishishini lokwakha. Isetyenziswe ngokubanzi ngodaka olusekwe kwisamente, udaka oluxubeneyo, amachaphaza kunye nezinye iimveliso ukuba zikhule, zigcine amanzi, ziphucule kunemisebenzi emininzi kunye nokuphuculwa kwentsebenzo. Indima yayo esebukhosini ibaluleke kakhulu, ngakumbi ekuphuculeni ukunganyangeki kodaka.
1. Ukugcinwa kwamanzi
I-HPMC inendawo elungileyo yokugcina amanzi, okuthetha ukuba amanzi ayiyi kuphuma ngokukhawuleza ngexesha lolwakhiwo lodaka, ngaloo ndlela ekuphephe ukulahleka kwamanzi okubangelwa kukulahleka kwamanzi. Ngakumbi kwiindawo ezomileyo neziphezulu zobushushu, umphumo wokugcinwa kwamanzi we-HPMC ikakhulu. Ukufuma komswakama kudaka kunokuhlala uzinzile kangangexesha elithile lokuphepha ukumohlwaya ngaphambi kwexesha, nto leyo ebaluleke kakhulu ekuphuculeni udaka lodaka. Ukugcinwa kwamanzi kunokulibazisa inkqubo ye-qumed, ukuvumela amasuntswana ethutyana ukuba akwazi ukusabela ngokupheleleyo ngamanzi ixesha elide, ngaloo ndlela ephucula ukuchasana nodaka.
2. Ukuphucula ububi bodaka
Njenge-gicker, i-HPMC inokwenza ubume obuhle be-molecular kwi-molecular entweni yokuphucula ububi kunye nolwelo lodaka. Oku akuphuculi kuphela amandla aphezulu phakathi kodaka phakathi kodaka kunye nomaleko wesiseko kwaye kunciphisa ukuqhekeka kodaka, kodwa kukuphucula ubunzima obupheleleyo buyeyona nto ibangelwe yimikhosi yangaphandle ngexesha lenkqubo yokwakha. Ukunamathela okwenzayo kwenza ukuba udaka iyunifomu ngexesha lokwakha kwaye unciphise imigxobhozo ebangelwa bubukhulu obungalingani ngamalungu.
3. Ukuphucula iplasitiki kunye nokusebenza kodaka
I-HPMC iphucula iplasitiki kwaye isebenza ngodaka, enokuthi iphucule ngokufanelekileyo ukwakhiwa. Ngenxa yesiphumo sayo esinqeni, i-HPMC inokwenza udaka lubethelelene ngakumbi kwaye lube seludaleni, ukunciphisa ngokufanelekileyo ukuvela kwemingxunya okubangelwa ngulwelo olungalingani nolwakhiwo. Iplasitim elungileyo yenza ukuba udaka lugxininisile ngexesha lomile kunye ne-shrinkage, ukunciphisa ukubakho kwezinto ezinqabileyo ngenxa yoxinzelelo olungalinganiyo.
I-4. Ukunciphisa i-shrinkagety
I-Shrinkage eyomileyo yindawo ye-shrinkab yevoti ebangelwa kukubethwa kwamanzi ngexesha lenkqubo yokomisa yodaka. I-shrinkage eyomileyo iya kubangela ukuba kuqhekeke kumphezulu okanye ngaphakathi kodaka. I-HPMC iyacothisa i-Eaporation yokuphuma kwamanzi kwaye inciphise ukuvela kwe-shrinkage eyomileyo ngokusebenzisa umlondolozi wezixhobo eziphezulu kunye neziphumo zeplasitiki. Uphando lubonisa ukuba udaka olongezelelekileyo nge-HPMC lunenqanaba eliphantsi lokumisa kunye notshintsho lwevolumu engaphantsi kwenkqubo yokomisa, ngalo lonke ixesha uthintela imingxunya ebangelwe kukuncipha kowomisayo. Kwiindonga ezinkulu zendawo okanye imigangatho, ngakumbi kwihlobo elishushu ihlobo okanye kwiimeko ezingena ezihlayo kwaye ezomileyo, indima ye-HPMC ibaluleke kakhulu.
I-5. Phucula ukunganyangeki kodaka
Isakhiwo se-MOLERAN sinokwenza unxibelelwano oluthile lwekhemikhali nesamente kunye nezinye izinto ezingenazo ezingcungcuthekileyo elulanjeni, ukwenza ukuba udaka lunokunyangeka kakhulu emva kokukhula nzima. Lo mandla okuqhekeka ophuculweyo kungekuphela nje kwindibaniselwano ne-HPMC ngexesha lenkqubo ye-quadration, kodwa iphucula ubunzima bodaka ukuba lungaphezulu. Ubunzima bodaka emva kokukhuliswa buyaphuculwa, nto leyo iyanceda ukumelana noxinzelelo olukhulu lwangaphandle kwaye ayihambelani nokujwila. Ingakumbi kwiimeko ezinomahluko omkhulu wobushushu okanye utshintsho olukhulu kwimithwalo engaphandle, i-HPMC inokuphucula ngokuchaseneyo nodaka.
6. Yandisa ukungafezeki kodaka
Njengezinto ze-polymer ye-orlymer, i-HPMC inokwenza ubume benethiwekhi ye-microscopic kwi-rorscopic kwi-rordar yokuphucula ukungcola kodaka. Olu phawu lwenza ukuba udaka alunyanzelekanga kwaye lunciphise ingqumbo yokufuma kunye neminye imithombo yangaphandle. Kwimeko enomswakama okanye omanzi, rocks kumphezulu nangaphandle kodaka banokuba bahlaselwa ngumswakama, okhokela ngakumbi ukwanda kwemiluki. Ukongezwa kwe-HPMC kunokunciphisa ngempumelelo ukungena kwamanzi kwaye kuthintele ukwanda kwemingxunya ebangelwe kukungena kwamanzi, ngaloo ndlela kuphuculwe ukuchasana nodaka.
I-7. Ethi ithintele isizukulwana kunye nokwandiswa kwemicro-cracks
Ngexesha lenkqubo eyomileyo kunye nelukhuni yodaka, imigangatho emincinci ihlala ngaphakathi, kwaye ezi rocks ezincinci zinokwanda kwaye zenze umoya obonakalayo phantsi kwesenzo samandla angaphandle. I-HPMC inokwenza imeko yenethiwekhi engaphelelanga ngaphakathi kodaka kwimolekyuli yayo, ukunciphisa amathuba emincinci. Nokuba ii-microcks ezincinci zenzeka, i-HPMC inokudlala indima ethile ye-anti-crack kwaye ibathintele kwandise. Kungenxa yokuba imixokelelwane ye-polymer ye-HPMC inokusasaza uxinzelelo kumacala omabini okuqhekeka kwi-intermolecular esebenzisa udaka olunodaka elulambo.
8. Phucula imeko ye-elastic yodaka
Imodeli ye-elastic ngulophawu olubalulekileyo lwesakhono sokwenza izinto zokumelana nengxaki. Ngoludaka, umodushe oluphezulu ophezulu unokwenza ukuba uzinze ngakumbi xa iphantsi kwamandla angaphandle kwaye amathuba okubangela ukungcungcutheka kakhulu okanye ukuqhekeka. Njengomntu weplastiki, i-HPMC inokunyusa udaka lwayo ngodaka, ivumela udaka ukuba luhlale lungcono lugcine ubume bayo phantsi kwesenzo samandla angaphandle, ngaloo ndlela kunciphisa ukuvela kwe-rocks.
I-HPMCUkuphucula amandla okuqhekeka kodaka kwimiba emininzi ngokuphucula ukugcinwa kwamanzi, ukunamathela, iplasitiki kunye nokusebenza kwamandla e-shrink, kunye nokuphucula amandla okuqhekeka, ukungasebenzi kakuhle. intsebenzo. Ke ngoko, ukusetyenziswa kwe-HPMC e-HPMC e-HPMC ekwakhiweni akunakuphela nje ukuphucula ukunyangwa kodaka kunye nokwandisa ubomi benkonzo yodaka.
IXESHA LOKUQALA: I-DEC-16 ukuya ku-2004