Nguwuphi umahluko kwinkqubo yemveliso phakathi kwe-HPMC ebandayo ye-HPMC

I-HPMC (Hydroxypropyl Methylcelcelsulose) yimpahla yePolymer esetyenziswa kakhulu ekwakhiweni, amayeza, ukutya, iikhemikhali zemihla ngemihla kunye nezinye iikhemikhali zemihla ngemihla. Ngokutsho kwazo ukulima emanzini, kunokwahlulwa kubanda kubanda kakhulu kwaye kushushu. Kukho umahluko obonakalayo kwinkqubo yemveliso yezi ntlobo zimbini ze-HPMC.

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I-1. Uhlobo lwaManzi oluBala
Kwinkqubo yemveliso ye-HPME ye-HPMC, izixhobo eziluhlaza kuqala kufuneka zihlulwe. Izinto ezingafunekiyo zibandakanya isellulose, i-methanol, propylene oxide, i-propyl chloride, njl njl. Ngokukodwa, unyango lweselselose lufuna ukomisa okungqongqo nokutyumza ukufezekisa ubungakanani bobuqili obufanelekileyo.

2. Uhlobo olushushu olushushu
I-HPMC ye-HPMC iyafana ne-HEAR-RORMCMC ye-HPMC ngokwemigaqo yokufikelela kwizinto ezibonakalayo, kodwa ineemfuno eziphezulu zokulungiswa kweselfowuni. Kuba i-HPMC eshushu i-HPMC kufuneka ikwazi ukusabela kumaqondo obushushu aphezulu, ubungakanani bobungakanani be-selselose benempembelelo ebaluleke kakhulu kwinkqubo yokuphendula. Ihlala inyanzelekile ukuba isebenzise i-selsulose ecocekileyo ecocekileyo, kwaye ubungakanani be -unticle kufuneka bulawulwe ngokungqongqo ngexesha lenkqubo yokutyumza.

(2), impendulo ye-synthesis
I-1. Uhlobo lwaManzi oluBala
Impendulo yeSynthesis ye-Synthesing ye-HPMM ye-HPMC ihlala iqhutywa ngobushushu obuphantsi, ilawulwa ngokubanzi nge-20-50 degrees Celsius. Ngexesha lenkqubo yokuphendula, isellulose iqale phantsi kweemeko ze-alkaline ukuze ihlambulukene ngokuyinxalenye yeemolekyuli ze-selselese molecular kwaye ivelise amaqela e-hydroxyl yasimahla. Emva koko, ii-reasces ezinje nge-methanol, i-propylene oxide kunye ne-methyl chloride yongezwa phantsi kweemeko ezinomdla zokwenza i-ethe terication. Inkqubo yonke yokuphendula ifuna ulawulo olungqongqo lobushushu kunye ne-PH ukuqinisekisa ukufana nokuzinza kwemveliso.

2. Uhlobo olushushu olushushu
Impendulo yeSynthesis ye-HPMMC ye-HPMC yenziwa kwiqondo lobushushu eliphezulu, ngokubanzi i-50-80 i-degrees celsius okanye ngaphezulu. Inkqubo yokuphendula iyafana nohlobo lwamanzi abandayo kwangoko, kodwa ngenxa yenqanaba lokuphendula ngokukhawuleza phantsi kweemeko zobushushu obuphezulu, ukulawula ubushushu obufanelekileyo kunye nexesha lokuphendula kuyafuneka. Kwiqondo lobushushu eliphakamileyo, i-hydrolysis kunye ne-herroctions yokuphendula ye-selulose igqibelele, kwaye ukuhanjiswa kwemolekyuli yemveliso yemveliso ikhululekile ngakumbi.

(3) Inkqubo yokuqhubela phambili
I-1. Uhlobo lwaManzi oluBala
Emva kokuphendula kweSynthesic ye-Synthesic ye-HPMM ye-HPMC igqityiwe, kuthotho lweenkqubo zokwenza emva kufuneka. Eyokuqala yindlela yokungathathi hlangothi ukunqanda izinto zeAlkaline kumxube wokuphendula. Ukuqunjelwa kunye nokuhlamba emva koko kwenziwa ukuze kususwe ngaphandle kwezinto ezingafunekiyo kunye neemveliso. Inyathelo lokugqibela loma kwaye litsala. Imveliso yomisiwe ukulawula umxholo wokufuma, emva koko ityhilwe kubungakanani obufanelekileyo bokufumana i-HPMC ye-HPMC.

2. Uhlobo olushushu olushushu
Inkqubo yokunyanga emva konyango ye-HPMC ifana ngokusisiseko kwi-HPMOR ye-HPMC. Nangona kunjalo, ngenxa yeqondo lobushushu obuphezulu elisetyenziswa kwinkqubo yokuphendula, umbandela wemiswakama wemveliso iphantsi kwaye inkqubo yokomisa ilula. Ukongeza, i-HPMC eshushu i-HPMC kufuneka ihlawule ngakumbi ekulawuleni iqondo lokushisa ngexesha lokutyumza ukukhusela ukonakaliswa kwendlela yokusebenza kwemveliso.

(4), ukusebenza kunye nokusebenza
I-HPMC ebandayo ye-HPMC isetyenziswa ngokubanzi kwimihlaba efuna ukwenziwa kweefilimu ngokukhawuleza okanye ukuthambisa, njengengubo yoyilo, i-euls. Njl. Iimfuno zayo zemveliso ziphezulu, ngakumbi ulawulo lweemeko zokuphendula ngamaqondo obushushu asezantsi.

I-HPMP ye-HPMC ifanelekile kwizicelo eziphantsi kweemeko zobushushu obuphezulu, ezinjenge-tile ye-tile, powty powder, njl njl, ngenxa yokufa kakhulu emanzini ashushu. Inkqubo yayo yemveliso ilula, kodwa ineemfuno eziphezulu ekucoceni izinto ezingafunekiyo kunye nolawulo lobungakanani bendlela yobushushu.

Umahluko ophambili kwinkqubo yemveliso phakathi kwendawo ebandayo yamanzi ephindaphindiweyo kunye ne-HPMC ye-HPMC ngumahluko kubungakanani bokuphendula, echaphazela ngqo inkqubo yokwahlula izinto, inkqubo yokuphendula ye-synthesi kunye nenkqubo yonyango. Uhlobo lwendawo ebandayo yethutyana kufuneka ikwazi ukusabela kwiqondo lokushisa elisezantsi kwaye lineemfuno eziphezulu zeqondo lobushushu kunye nolawulo lwe-PH, ngelixa uhlobo olushushu lusebenze kwiqondo lokuphumla kunye nolawulo lobushushu bendlela. Ezi zimbini ziyahlukile kwimihlaba ethile yesicelo, kwaye nganye idlala indima ebalulekileyo.