Iimpawu zokwenza ifilimu ze-hydroxypropyl methylcellulose (HPMC) ezikumgangatho wezimboni zizinto ezibalulekileyo ekusetyenzisweni kwayo ngokubanzi kwiindawo ezininzi zokusetyenziswa. I-HPMC yi-ether ye-cellulose enyibilikayo emanzini esetyenziswa kakhulu kushishino. Iimpawu zayo zokwenza ifilimu ziquka iimpawu zoomatshini, iimpawu zokukhanya, uzinzo lweekhemikhali, ukuhambelana nezinye izithako, kunye nezinye izinto ezininzi.
1. Indlela yokwenza ifilimu
I-HPMC iyanyibilika emanzini ukuze yenze isisombululo se-colloidal esicacileyo. Emva kokuba amanzi ephumile, iimolekyuli ze-HPMC kwisisombululo ziyahlengahlengisa kwaye zidibene ukuze zenze ifilimu eqhubekayo enamandla athile kunye nokuqina. Ukubakho kwamaqela e-hydroxypropyl (-CH2CHOHCH3) kunye ne-methyl (-CH3) kwikhonkco leemolekyuli ze-HPMC kunika ifilimu amandla agqwesileyo oomatshini kunye nomlinganiselo othile wokuguquguquka.
2. Iimpawu zoomatshini
Amandla kunye nokuguquguquka
Iifilimu ze-HPMC zinamandla aphezulu okutsalwa kunye nokuqina kwaye zinokumelana noxinzelelo oluthile loomatshini ngaphandle kokuqhekeka. Ezi mpawu zoomatshini zinxulumene nobunzima beemolekyuli, inqanaba lokutshintshwa, kunye noxinzelelo lwesisombululo se-HPMC. I-HPMC enobunzima beemolekyuli obuphezulu kunye nenqanaba lokutshintshwa idla ngokwenza iifilimu eziqinileyo neziqinileyo. Oku kwenza i-HPMC ixabiseke kakhulu kwizicelo ezifuna amandla aphezulu oomatshini, njengezinto zokwakha, iingubo, kunye neepilisi zamayeza.
Ukunamathela
Iifilimu ze-HPMC zinamathela kakuhle kwaye zinokunamathela kakuhle kwiindawo ezahlukeneyo ze-substrate, ezifana nephepha, isinyithi, iglasi, kunye neplastiki. Le mpawu yenza ukuba isetyenziswe kakhulu kwiingubo kunye nee-adhesion. Ukunamathela kukwachaphazeleka kuxinano lwesisombululo kunye neemeko zokomisa.
3. Iimpawu ezibonakalayo
Iifilimu ze-HPMC zihlala zibonakala okanye zikhanya kwaye zineempawu ezintle zokukhanya. Ukucaca kwezi filimu kuxhomekeke kakhulu ekufaneni kwesisombululo, iimeko zokomisa, kunye nenani lamaqamza amancinci anokuvela ngexesha lenkqubo yokwenziwa kwefilimu. Ukucaca okuphezulu kwenza i-HPMC ibe luncedo kakhulu kwizicelo ezifuna ukujongwa ngamehlo, ezifana nokupakishwa kokutya, ukugqunywa ngamayeza, kunye nokugqunywa okukhuselekileyo.
4. Uzinzo lweekhemikhali
Ukumelana namanzi
Iifilimu ze-HPMC zinomlinganiselo othile wokumelana namanzi. Nangona i-HPMC ngokwayo inyibilika emanzini, isakhiwo emva kokwenziwa kwefilimu asinyibiliki lula xa sichatshazelwa ngamanzi. Le propati iluncedo kwiindawo ezininzi, ezifana nee-putty zokwakha, izinto zokuncamathelisa, kunye neengubo ezisekelwe emanzini. Nangona kunjalo, ukumelana namanzi akuphelelanga, kwaye ukuntywiliselwa emanzini ixesha elide kunokubangela ukudumba okanye ukuqhekeka kwefilimu.
Ukumelana neekhemikhali
Ifilimu ye-HPMC inokumelana okuhle kwiikhemikhali ezahlukeneyo, ingakumbi kwiindawo ezingathathi hlangothi ze-acid-base. Oku kuyenza ifaneleke kwiindawo ezithile ezirhabaxa, ezifana neengubo kunye neefilimu zokukhusela kwishishini leekhemikhali. Uzinzo lweekhemikhali lwefilimu ye-HPMC lukwachaphazeleka bubungakanani bayo bokudibanisa kunye nendawo esetyenziswa kuyo.
5. Iimeko zokwenza ifilimu
Uxinzelelo lwesisombululo
Uxinzelelo lwesisombululo luchaphazela ngokuthe ngqo umgangatho we-HPMC obumba ifilimu kunye neempawu zefilimu. Ngokubanzi, uxinano oluphezulu lwezisombululo ze-HPMC lwenza iifilimu ezityebileyo nezinamandla. Nangona kunjalo, uxinano oluphezulu kakhulu lunokubangela ukuxinana okukhulu kwesisombululo, okwenza kube nzima ukusifaka ngokulinganayo.
Iimeko zokomisa
Isantya sokomisa kunye nobushushu bunempembelelo enkulu ekwakhekeni nakwiimpawu zefilimu. Amaqondo obushushu aphezulu okomisa kunye nesantya sokomisa esikhawulezayo kudla ngokukhokelela ekwakhekeni kwamaqamza kwifilimu, okuchaphazela ukucaca kunye neepropati zoomatshini zefilimu. Inkqubo yokomisa ecothayo inceda ekwenzeni ifilimu efanayo, kodwa inokubangela ukungaguquguquki ngokwaneleyo kwesinyibilikisi, okuchaphazela umgangatho wefilimu.
6. Ukuhambelana nezinye izithako
Ifilimu ye-HPMC ihambelana kakuhle neentlobo ngeentlobo zezongezo kunye nezinto ezisebenzayo, ezifana neeplastiki, ii-crosslinkers, ii-fillers, njl. Oku kuhambelana kuvumela i-HPMC ukuba isetyenziswe kakhulu ekulungiseleleni izinto ezidityanisiweyo okanye ii-coating ezisebenzayo. Umzekelo, ukongeza iiplastiki kunokuphucula ukuguquguquka kwefilimu, ngelixa ii-agents ezidibanisayo zinokunyusa amandla kunye nokumelana namanzi kwefilimu.
7. Iindawo zokusetyenziswa
Izixhobo zokwakha
Kwizinto zokwakha, iifilimu ze-HPMC zisetyenziswa kwi-dry-mixed mortar, i-putty, ii-coating kunye nezinye iimveliso. Iimpawu zayo zokwenza ifilimu zinokuphucula ukunamathela, ukumelana nokuqhekeka kunye nokumelana namanzi kweemveliso.
Amayeza
Kwicandelo lezemithi, i-HPMC isetyenziswa njengezinto zokugquma iipilisi zezemithi. Iimpawu zayo zokwenza ifilimu zinokulawula ngempumelelo izinga lokukhululwa kwamayeza kwaye ziphucule uzinzo kunye nokusebenza kwamayeza.
Ishishini lokutya
Iifilimu ze-HPMC zisetyenziswa njengezinto zokupakisha ezityiwayo kwishishini lokutya ezineempawu ezintle zokuthintela kunye nokhuseleko.
Iingubo kunye nezincamathelisi
Ukunamathela kunye nokungafihlisi kweefilimu ze-HPMC kuzenza zibe zizinto ezifanelekileyo zokugquma kunye nezincamathelisi, kwaye zisetyenziswa kakhulu kumashishini okugquma kunye nokupakisha kwimizi-mveliso.
8. Ubuhlobo nokusingqongileyo
I-HPMC yimveliso eguquliweyo ephuma kwi-cellulose yendalo. Inkqubo yayo yokwenza ifilimu ayifuni zinyibilikisi eziyingozi kwaye inokubola kakuhle kwaye inobuhlobo nokusingqongileyo. Oku kuyenza ibaluleke kakhulu kuphuhliso lwekhemistri eluhlaza kunye nezixhobo ezizinzileyo.
Iimpawu zokwenza ifilimu ze-HPMC yodidi lwemizi-mveliso zenza ukuba ibe yinto ebaluleke kakhulu kwiindlela ezahlukeneyo zokusetyenziswa. Iingenelo zayo kumandla oomatshini, iimpawu zokukhanya, uzinzo lweekhemikhali, kunye nokuhambelana okuhle nezinye izinto zinika uluhlu olubanzi lwamandla okusetyenziswa. Nokuba kwizixhobo zokwakha, amayeza, ukupakishwa kokutya, okanye kwiingubo kunye nezincamathelisi, i-HPMC ibonakalise ukusebenza okugqwesileyo. Ngokuhambela phambili kwesayensi netekhnoloji, itekhnoloji yokwenza ifilimu kunye neendawo zokusetyenziswa ze-HPMC ziya kuqhubeka nokukhula, zikhuthaza uphuhliso lwezicelo ezintsha ngakumbi.
Ixesha leposi: Juni-29-2024