I-Carboxymethyl cellulose (CMC) kunye ne-hydroxyethyl cellulose (HEC) zizinto ezimbini eziqhelekileyo zeselulosi, ezisetyenziswa ngokubanzi kukutya, amayeza, izithambiso, izinto zokwakha kunye nezinye iindawo. Nangona zombini ziphuma kwi-cellulose yendalo kwaye zifunyenwe ngokuguqulwa kweekhemikhali, kukho ukungafani okucacileyo kwisakhiwo samakhemikhali, iipropati ze-physicochemical, imimandla yesicelo kunye nemiphumo yokusebenza.
1. Ubume beMichiza
Into ephambili yesakhiwo se-carboxymethyl cellulose (CMC) kukuba amaqela e-hydroxyl kwiimolekyuli ze-cellulose athatyathelwa indawo ngamaqela e-carboxymethyl (-CH2COOH). Oku kuguqulwa kwemichiza kwenza i-CMC inyibilike kakhulu emanzini, ngakumbi emanzini ukwenza isisombululo se-viscous colloidal. I-viscosity yesisombululo sayo ihambelana ngokusondeleyo neqondo layo lokutshintshwa (oko kukuthi iqondo lokutshintshwa kwe-carboxymethyl).
I-Hydroxyethyl cellulose (HEC) yenziwe ngokutshintshela amaqela e-hydroxyl kwi-cellulose nge-hydroxyethyl (-CH2CH2OH). Iqela le-hydroxyethyl kwi-molecule ye-HEC yandisa ukunyibilika kwamanzi kunye ne-hydrophilicity ye-cellulose, kwaye inokwenza i-gel phantsi kweemeko ezithile. Esi sakhiwo senza ukuba i-HEC ibonise ukutyeba okulungileyo, ukumiswa kunye nemiphumo yokuzinzisa kwisisombululo samanzi.
2. Iimpawu zomzimba kunye neekhemikhali
Ukunyibilika kwamanzi:
I-CMC inokunyibilika ngokupheleleyo emanzini abandayo kunye nashushu ukwenza isisombululo se-colloidal esicacileyo okanye esiguquguqukayo. Isisombululo saso sine-viscosity ephezulu, kwaye i-viscosity iyatshintsha ngokushisa kunye nexabiso le-pH. I-HEC inokuchithwa kumanzi abandayo kunye nashushu, kodwa xa kuthelekiswa ne-CMC, izinga lokuchithwa kwayo licotha kwaye kuthatha ixesha elide ukwenza isisombululo esifanayo. I-viscosity yesisombululo se-HEC iphantsi, kodwa inokumelana netyuwa engcono kunye nokuzinza.
Uhlengahlengiso lweViscosity:
I-viscosity ye-CMC ichaphazeleka lula ngexabiso le-pH. Ngokuqhelekileyo iphezulu phantsi kweemeko ezingathathi hlangothi okanye ze-alkaline, kodwa i-viscosity iya kuncitshiswa kakhulu phantsi kweemeko ezinamandla ze-acidic. I-viscosity ye-HEC ichaphazeleka kancinci ngexabiso le-pH, inoluhlu olubanzi lokuzinza kwe-pH, kwaye ifanelekile kwizicelo phantsi kweemeko ezahlukeneyo ze-acidic kunye ne-alkaline.
Ukumelana netyuwa:
I-CMC inomdla kakhulu kwityuwa, kwaye ubukho betyuwa buya kunciphisa kakhulu i-viscosity yesisombululo sayo. I-HEC, kwelinye icala, ibonisa ukuxhathisa ityuwa eyomeleleyo kwaye isenokugcina isiphumo esihle sokuqina kwindawo enetyuwa eninzi. Ngoko ke, i-HEC ineenzuzo ezicacileyo kwiinkqubo ezifuna ukusetyenziswa kweetyuwa.
3. Iindawo zokufaka izicelo
Ishishini lokutya:
I-CMC isetyenziswa kakhulu kushishino lokutya njengento etyebisayo, isizinzisi kunye ne-emulsifier. Ngokomzekelo, kwiimveliso ezifana ne-ayisikrimu, iziselo, iijam, kunye neesosi, i-CMC inokuphucula incasa kunye nokuzinza kwemveliso. I-HEC ayifane isetyenziswe kwishishini lokutya kwaye isetyenziswa ikakhulu kwezinye iimveliso ezineemfuno ezikhethekileyo, ezifana nokutya okunekhalori ephantsi kunye nezongezo ezikhethekileyo zesondlo.
Amayeza kunye nezithambiso:
I-CMC isoloko isetyenziselwa ukulungiselela iipilisi ezizinzileyo zokukhutshwa kwamachiza, ulwelo lwamehlo, njl., ngenxa ye-biocompatibility yayo elungileyo kunye nokhuseleko. I-HEC isetyenziswa ngokubanzi kwii-cosmetics ezifana ne-lotions, i-creams kunye ne-shampoos ngenxa ye-film-forming kunye ne-moisturizing properties, ezinokubonelela ngemvakalelo emihle kunye nefuthe lokuthambisa.
Izixhobo zokwakha:
Kwizinto zokwakha, zombini i-CMC kunye ne-HEC ingasetyenziswa njengezinto ezityebisayo kunye nezigcina amanzi, ngakumbi kwi-samente kunye nezixhobo ezisekelwe kwi-gypsum. I-HEC isetyenziswa ngokubanzi kwizinto zokwakha ngenxa yokumelana netyuwa elungileyo kunye nokuzinza, okunokuphucula ukusebenza kokwakhiwa kunye nokuqina kwezinto.
Ukukhutshwa kwe-oyile:
Kwi-oyile yokutsalwa, i-CMC, njenge-additive for drilling fluid, inokulawula ngokufanelekileyo i-viscosity kunye nokulahleka kwamanzi odaka. I-HEC, ngenxa yokumelana kwayo netyuwa ephezulu kunye neempawu zokuqina, iye yaba yinto ebalulekileyo kwiikhemikhali ze-oilfield, ezisetyenziselwa i-drilling fluid kunye ne-fracturing fluid ukuphucula ukusebenza kakuhle kunye neenzuzo zezoqoqosho.
4. Ukhuseleko lokusingqongileyo kunye nokonakaliswa kwezinto eziphilayo
Zombini i-CMC kunye ne-HEC zithathwe kwi-cellulose yendalo kwaye zine-biodegradability elungileyo kunye nobuhlobo bendalo. Kwimekobume yendalo, zinokonakaliswa ziintsholongwane zivelisa izinto ezingenabungozi njengekharbon diokside namanzi, zinciphisa ukungcoliseka kwendalo. Ukongeza, ngenxa yokuba ayinayo ityhefu kwaye ayinabungozi, isetyenziswa ngokubanzi kwiimveliso ezidibana ngqo nomzimba womntu, njengokutya, amayeza kunye nezithambiso.
Nangona i-carboxymethyl cellulose (CMC) kunye ne-hydroxyethyl cellulose (HEC) zombini ziphuma kwi-cellulose, zineentlukwano ezinkulu kwisakhiwo samakhemikhali, iipropati ze-physicochemical, imimandla yesicelo kunye nemiphumo yokusebenza. I-CMC isetyenziswa ngokubanzi kukutya, amayeza, ukutsalwa kweoli kunye nezinye iindawo ngenxa ye-viscosity yayo ephezulu kunye nokuchaphazeleka kokusingqongileyo. I-HEC, nangona kunjalo, isetyenziswa ngokubanzi kwi-cosmetics, izinto zokwakha, njl. ngenxa yokuxhathisa ityuwa, ukuzinza kunye neempawu zokwenza ifilimu. Xa ukhetha ukuyisebenzisa, kuyimfuneko ukukhetha eyona nto ifanelekileyo ye-cellulose derivative ngokwemeko yesicelo esithile kwaye kufuneka ufezekise umphumo wokusetyenziswa.
Ixesha lokuposa: Aug-21-2024