Ukuvelisa i-hydroxypropyl methylcelculose (i-HPMC) kubandakanya amanyathelo aliqela antsonkothileyo aguqula i-selsulose kwi-polymer ye-polymer ngoluhlu olubanzi lwezixhobo kumashishini ahlukeneyo. Le nkqubo idla ngokuqala ngokusungulwa kweselcelose kwimithombo esekwe kwizityalo, ilandelwe ngokuhlengahlengiswa kweekhemikhali ukwazisa i-hydroxypropyl kunye namaqela e-methyl kwi-sellose yeselselose. Isiphumo se-HPMC se-HPMC ibonelela ngeempawu ezizodwa ezinjengokutyibilika, ukubopha, ukwenziwa kwefilimu, kunye nokugcinwa kwamanzi. Masiphathe kwinkqubo eneenkcukacha yemveliso ye-HPMC.
I-1. Ukuphononongwa kwezinto eziluhlaza:
Isixhobo esiyintloko esiyintloko semveliso ye-HPMC yiselleulose, ethathwe kwimithombo esekwe kwizityalo ezinjengeenkuni, ii-cotton ze-cotton, okanye ezinye izityalo ezinamaqhina. Le mithombo ikhethwe ngokusekwe kwizinto ezifana nonyulo, umxholo weselfowuni, kunye nokuzinza.
I-2. Ukukhutshwa kweselfowuni:
I-seluplose ikhutshelwe kwimithombo esekwe kwizityalo ekhethiweyo ngothotho lweenkqubo zoomatshini kunye neekhemikhali. Ekuqaleni, izinto ezingafunekiyo zijonga ukutshata, nto leyo inokubandakanya ukuhlamba, ukugaya, kunye nokomisa ukususa ukungcola kunye nokufuma. Emva koko, i-seluplose isesidla ngokuhlala ngeekhemikhali ezinje nge-alkalis okanye i-acids yokuqhekeza i-lign kunye ne-hemicelsulose, ishiya i-fibesse ecocekileyo.
I-3. Isivumelwano:
Isiqinisekiso seyona nkqubo iphambili yekhemikhali kwimveliso ye-HPMC, apho i-hydroxypropy ye-Hydropyl kunye ne-methyl yamaqela aziswa kwi-selsulose backbone. Eli nyathelo libalulekile ekuguquleni iipropathi zeselutase yokufezekisa ukusebenza okufunwayo kwe-HPMC. I-ether idla ngokuqhubeka ngempendulo ye-sellulose ene-propylene oxide (ye-hydroxypropy) kunye ne-methyl chloride (yamaqela e-methyl) phambi kweemeko ezilawulwayo zeqondo lobushushu kunye noxinzelelo.
4. Ukungathathi cala kunye nokuhlamba:
Emva kokuthumeza, umxube wokuphendula awunamacala ukususa nayiphi na i-Alkali Catalysts kwaye ulungelelanise inqanaba le-PH. Oku kuhlala kwenziwe ngokongeza i-acid okanye kwisiseko kuxhomekeka kwiimeko ezithile zokuphendula. Ukungathathi cala kulandelwa kukuhlanjwa ngokucokisekileyo ukususa iimveliso, iichemicals ezingadibaniyo, kunye nokungcola kwimveliso ye-HPMC.
5. Ukuthoba kunye nokomisa:
Isisombululo se-HPMC se-HPMC se-HPMC senza isimilo sokuqinana kwamasuntswana ahlukeneyo kwaye sifezekise isisombululo esicacileyo. Ukuqulunqa kunokubandakanya iindlela ezahlukeneyo ezinjengokuphosa okanye ukuqhekeka. Nje ukuba isisombululo sicacisiwe, somisiwe sinokususa amanzi kwaye sifumane i-HPMC kwiFom yomgubo. Iindlela zokomisa zinokubandakanya ukomisa i-spray, okanye idyokhwe yokusoma, okanye idrum yomile, kuxhomekeka kubungakanani obufundiweyo kunye neepropathi zemveliso yokugqibela.
I-6. Ukugaya kunye nokuhlala (ngokuzithandela):
Ngamanye amaxesha, i-HPMC eyomileyo ye-HPMC inokwenza ukuqhubela phambili okunjalo njengokugaya nokusingisa ukufezekisa ubungakanani obuthile bokuyifumana kunye nokuphucula ukungasebenzi kakuhle. Eli nyathelo linceda ukufumana i-HPMC ngeempawu ezingaqhelekanga zomzimba ezifanelekileyo kwizicelo ezahlukeneyo.
7. Ulawulo loMgangatho:
Kuyo yonke inkqubo yokuvelisa, amanyathelo angqongqo olawulo lomgangatho amiliselwe ukuqinisekisa ubunyulu, ukungqinelana kunye nokusebenza kwemveliso ye-HPMC. Iiparamitha ezisemgangathweni zinokubandakanya i-viscofity, ubungakanani bentsumpa, umxholo wokufuma, inqanaba lokufakwa endaweni (DS), kunye nezinye izinto ezifanelekileyo. Iindlela zohlalutyo ezifana nemilinganiselo ye-viscosity, spectrascopy, i-chromatography, kunye ne-microscopy zisetyenziselwa uvavanyo lomgangatho.
8. Ukupakisha kunye nokuGcina:
Nje ukuba imveliso ye-HPMC idlula iimvavanyo zolawulo lomgangatho, ipakishwe kwizitya ezifanelekileyo ezinjengeengxowa okanye imigqomo kwaye ineelebheli ngokweenkcukacha. Ukupakishwa ngokufanelekileyo kuyanceda ukukhusela i-HPMC ukusuka kumswakama, ungcoliseko, kunye nomonakalo womzimba ngexesha lokugcina kunye nokuhamba. I-HPMC ephathekiweyo igcinwe kwiimeko ezilawulwayo ukugcina uzinzo kunye nobomi beshelufa kude kude kulungele ukusasazwa kunye nokusetyenziswa.
Izicelo ze-HPMC:
I-Hydroxypropyl Methylcelcelsele ifumana ukusetyenziswa kakhulu kumashishini ahlukeneyo kubandakanya amashishini, ukwakhiwa, ukutya, ukutya, i-cosmetics, kunye neemveliso zononophelo. Kwimigangatho yamayeza, isetyenziswa njengendawo yokubhabha, i-suintergranti, ifilimu yangaphambili, kunye ne-arhente yokukhutshwa-khupha i-arhente yokukhutshwa kwetafile. Ekwakhiweni, i-HPMC iqeshwa i-gickener, iarhente yokugcina amanzi, kunye ne-raheology modifier esekwe kwisamente, iiplasters, kunye ne-theives. Ukutya, kuyasebenza njenge-thi cheki, i-stabilizer, kunye ne-mulssifier kwiimveliso ezinjengesosi, isuphu, kunye needessert. Ukongeza, i-HPMC isetyenziswa kwi-cosmetics kunye neemveliso zononophelo zobuqu zokwenza iifilimu zayo zefilimu, ukunyathela, kunye nokuguqula izinto eziguqulweyo.
Ukuqwalaselwa kwendalo:
Ukuveliswa kwe-HPMC, njengeenkqubo ezininzi zemizi-mveliso, zineempembelelo zemo engqongileyo. Kwenziwa iinzame zokuphucula uzinzo lwemveliso ye-HPMC ngamanyathelo anjengokusebenzisa amandla ahlaziyiweyo, asebenzise ubuchwephesha bezinto ezibonakalayo, kunye nokuphumeza itekhnoloji yemveliso yendalo. Ukongeza, uphuhliso lwe-HPMC esekwe kwi-bio -c evela kwimithombo emiziseko efana ne-algae okanye isithembiso sentsholongwane sibonisa ukunciphisa ishishini lendalo ye-HPMC.
Ukuveliswa kwe-hydroxypropyl methylcelcelgalose ibandakanya uthotho lwamanyathelo aqala ngokusungulwa kwesellulose ekuqinisekisweni kweekhemikhali, ukucocwa kunye nolawulo olusemgangathweni. Isiphumo se-HPMC se-HPMC sinikezela ngoluhlu olubanzi lwezinto ezisebenzayo kwaye ufumane izicelo kwimizi-mveliso eyahlukeneyo. Iinzame zokuzinza kunye noxanduva lokusingqongileyo ziqhuba izinto ezintsha kwimveliso ye-HPMC, ijolise ekunciphiseni ifuthe lendalo esingqongileyo ngelixa ihlangabezana ne-polymer ekhulayo ye-polymer ekhulayo.
IXESHA LOKUQALA: UMar-05-2024