I-HydroxyEtheetheetheetheethl seluplose (hec) yi-polymer engeyiyo i-ionic, i-poly-allmer ye-injiki evela kwi-selsulose ngokuguqula iikhemikhali. Ifumana ukusetyenziswa kakhulu kumashishini ahlukeneyo ngenxa yepropathi eyahlukileyo, njengokuthamba, ukuzinzisa, kunye nezakhono zokwenza ifilimu. Kwizicelo apho uzinzo lwe-PH lubalulekile, ukuqonda ukuba i-hec iziphatha njani phantsi kweemeko ezahlukeneyo ze-ps.
I-PH yokuzinza kweHec ibhekisa kubuchule bayo ukugcina ingqibelelo yayo, iipropathi ze-RIOLOPRTER, kunye nentsebenzo kuluhlu lwe-pl iimeko. Olu nzo luzinzo lubalulekile kwizicelo ezinje ngeemveliso zobuqu, amayeza, iingubo, kunye nezixhobo zokwakha, apho i-PH yendawo engqongileyo inokwahluka kakhulu.
Ulwakhiwo:
I-Hec iqhele ukudityaniswa ngokuphendula kwi-sellyulose ne-ithoylene oxide phantsi kweemeko ze-alkaline. Le nkqubo iphumela ekufakweni kwe-Hydroxyl amaqela e-selselose ye-selselose e-hydroxyythl (-och2ch2ch2ch2oh) amaqela. Inqanaba lokufakwa endaweni (DS) libonisa inani eliphakathi lamaqela e-hydroxytethyl kwiyunithi ye-anhydroglucose kwikhonkco leselselose.
Iipropathi:
Ukunyibilikisa: I-hec inyibilikisa emanzini kwaye icacile izisombululo ze-viscous.
I-viscosity: Ibonisa i-pseudoplastic okanye indlela yokuziphatha ye-shear, intsingiselo yokufakwa kwalo kuyancipha phantsi koxinzelelo lwe-Shear. Le propati yenza ukuba iluncedo kwizicelo apho ukuhamba kubalulekile, ezinjengeepeyinti kunye neepeyinti.
Ukutyibilika: I-HEC inika i-viscofity yezisombululo, iyenza ixabiseke njengearhente yokuthambisa kwiifom ezahlukeneyo.
Ukwenza ifilimu: Inokwenza iifilimu eziguquguqukayo nezingabonakaliyo xa yomile, ezinamandla kwizicelo ezinjengeebhushe kunye neengubo.
Uzinzo lwe-hec
I-PH yokuzinza kwe-hec ichukunyiswe zizinto ezininzi, kubandakanya nesakhiwo sekhemikhali se-polymer, intsebenzo kunye nendawo engqongileyo, kunye nayiphi na into eyongeziweyo ekumiselweni.
I-PH yokuzinza kwe-hec kwi-PH i-PH eyahlukileyo:
1. I-acidic pH:
Kwi-acidic ph, i-HEC ihlala izinzile kodwa inokuthi ifumaneke i-hydrolysis ngexesha elifanelekileyo phantsi kweemeko ze-acidic ezinzima. Nangona kunjalo, uninzi lwezicelo ezisebenzayo, ezinje ngeemveliso zobuqu kunye neengubo, apho i-acidic ifunyenwe, i-HEC ihlala izinzile ngaphakathi kwe-PH ye-PH (PH 3 ukuya kwi-6). Ngaphandle kwe-PH 3, umngcipheko wokunyuka kwe-hydrolysis, okhokelela ekunciphiseni kancinci kwi-viscofity kunye nokusebenza. Kubalulekile ukubeka esweni i-PH yefomu equkethe i-HEC kwaye ihlengahlengise ngokufanelekileyo ukuze uqiniseke uzinzo.
2. Ukungathathi cala PH:
UHec ubonakalisa uzinzo olugqibeleleyo phantsi kweemeko ze-HB 6 ukuya kwi-8). Olu luhlu lwe-PH luxhaphakile kwizicelo ezininzi, kubandakanya i-cosmetics, amayeza, kunye neemveliso zasekhaya. Ifomu le-hec-enezixhobo zigcina i-viscofity yazo, ipropathi eyoyikisayo, kunye nokusebenza ngokubanzi ngaphakathi kolu luhlu lwe-pH. Nangona kunjalo, kwizinto ezinje ngobushushu kunye namandla e-Ionic zinokuphembelela uzinzo kwaye kufuneka zithathelwe ingqalelo ngexesha lokuqulunqwa.
I-3. Alkaline PH:
I-hec ayizinzanga phantsi kweemeko ze-alkaline xa kuthelekiswa ne-acidic okanye engathathi hlangothi PH. Kwinqanaba le-PH ePHW (ngaphezulu kwe-PH 8), i-HEC inokwenza ukonakaliswa, ngenxa yokuncipha kwe-viscofity kunye nelahleko yokusebenza. I-Alkaline hydrolysis yonxibelelwano lwe-ERE phakathi kwe-Selelose Talbone kunye namaqela e-hydroxyyl anokwenzeka, okhokelayo kwi-Criin Cranction kwaye unciphise ubunzima bemolekyuli. Ke ngoko, kwi-Alkaline yeefomu ezifana nezicoci okanye izixhobo zokwakha, ezinye iipolimers okanye ukuzinza kungakhethwa ngaphezulu kwe-hec.
Izinto ezingenakuphembelela uzinzo lwe-PH
Izinto ezininzi zinokuba nefuthe kuzinzo lwe-PH:
Isidanga sokufakwa endaweni (DS): Hec ngexabiso eliphakamileyo le-DS lithanda ukuba luzinzile ngaphezulu kwe-PH ye-PH ejikeleze amaqela e-hydroxyyl, ephucula ukuntywila kwamanzi kunye nokuchasana ne-hydrolysis.
Ubushushu: Amaqondo obushushu aphakamileyo akhawulezisa ukuphendula kweekhemikhali, kubandakanya i-hydrolysis. Ke ngoko, ukugcina ukugcinwa okufanelekileyo nokugcina amaqondo obushushu kubalulekile ekugcineni uzinzo lwe-PH-equlethe iifomu.
Amandla e-Ionic: Ukugxininiswa kweetyuwa eziphezulu okanye ezinye ii-Ions kwi-forming kunokuba nefuthe kozinzo lwe-hec ngokuchaphazela ukonakala kwayo kunye nokunxibelelana neemolekyuli zawo. Amandla e-Ionic kufuneka alungiselelwe ukunciphisa iziphumo zokuhlala.
Izongezo: Ukufakwa kweezongezo ezifana ne-surfacapecapes, izinto ezigciniweyo, okanye iiarhente ezibuthathaka zinokuphembelela ukuzinza kwe-HOC. Uvavanyo lokuhambelana kufuneka lwenziwe ukuqinisekisa ukubaluleka kozinzo kunye nozinzo.
Izicelo kunye nokuqwalaselwa kokuqhelisela
Ukuqonda imeko ye-PH ye-hec kubalulekile ukuba iifomula kumashishini ahlukeneyo.
Nazi ezinye izinto eziqwalaselweyo:
Iimveliso zononophelo lobuqu: kwii-Shamps, oomongameli, kunye ne-outs, ukugcina uluhlu olufumileyo (ngokuqhelekileyo ukungathathi cala) ukungathathi cala njenge-hec njengearhente ye-HeC njenge-herment kunye nokumisa iarhente.
Amayeza: Hec asetyenziswa ekunqunyazeni ngomlomo, i-Ophthalmic Solutions, kunye neefom eziphambili. Ifomu kufuneka yenziwe kwaye igcinwe phantsi kweemeko ezigcina uzinzo lwehec ukuqinisekisa ukusebenza kwemveliso kunye nobomi beshelufa.
I-Coasthis kunye neepeyinti: hec uqeshiwe njenge-Rheology Modifier kunye ne-tickener kwiipeyinti ezisekwe emanzini kunye neengubo. Iifomula zefomula kufuneka zilungelelanise iimfuno ze-PH kunye nezinye iindlela zentsebenzo ezifana ne-viscofity, ukuvelisa, kunye nemo yefilimu.
Izixhobo zokwakha: Kwimisebenzi yobume besamente, i-hec isebenza njengearhente yokugcina amanzi kwaye iphucula ukusebenza. Nangona kunjalo, iimeko ze-alkaline esele zicela umngeni kuzinzo lwehection, ekunyanzeleni ukhetho ngononophelo kunye nokwenza uhlengahlengiso.
I-HydroxyEteethy Selelise (Hec) ibonelela ngeepropathi ze-righological nesebenzayo kwizicelo ezahlukeneyo. Ukuqonda ukuzinza kwayo kubalulekile ukuba iifomula zenze ukuphuhlisa ifomu elizinzileyo nefanelekileyo. Ngelixa i-hec ibonisa uzinzo oluhle phantsi kweemeko ze-HL ezingathathi hlangothi kunye ne-alkaline ukuthintela ukonakaliswa kunye nokuqinisekisa ukusebenza kakuhle. Ngokukhetha inqanaba elifanelekileyo le-HEC, ukwenza iiparamitha zokwenza izinto ezifanelekileyo, kunye nokuphumeza iimeko ezifanelekileyo zokugcina, iifomulators zinokuzisebenzisa izibonelelo ze-hec kwiimeko ezahlukeneyo ze-PH.
IXESHA LOKUQALA: UMar-29-2024