Ntawm ntau daim ntawv tshuaj pleev ib ce koj tuaj yeem pom cov khoom xyaw xws li cetyl cawv. Feem ntau nws yog siv los hloov stabilizer rau ntau yam emulsions thiab thickeners. Qhov no yog vim lub fact tias cov tshuaj no pab mus rau ib tug nce nyob rau hauv viscosity thiab txhim kho cov qauv ntawm cov tshuaj pleev ib ce, tsis hais nws qib pH. Peb yuav qhia koj ntxiv txog cov khoom zoo no, uas ntau tus tswv tsev nyiam siv hauv tsev tshuaj pleev ib ce, hauv qab no.
Ntawm haus cawv kom zoo nkauj
Cetyl, lossis palmitic, cawv yog hais txog cov tshuaj monohydric. Nws yog nws uas tau los ua ib qho ntawm thawj cov rog rog siv hauv kev lag luam tshuaj pleev ib ce. Thawj thawj zaug, cetyl cawv tau tshawb pom los ntawm Fab Kis tus kws kho mob Eugene Chevrel hauv xyoo 1823 thaum kawm txog lub hnab fibrous ntawm cov phev whale. Vim tib yam, lub npe ntawm cawv yog txhais los ntawm Greek li "whale".
Thiab yog thawj zaug rau kev rho tawm cov khoom nophev whales tau ntes tau, tom qab ntawd ntau tom qab lawv tau kawm los tsim nws cov khoom siv dag zog. Ib qho ntawm cov txheej txheem ntawm kev rho tawm cawv yog cov txheej txheem ntawm ib nrab oxidation ntawm paraffins. Lwm txoj kev paub zoo kom tau txais C16H33OH yog hydrogenation mus sij hawm ntev ntawm palmitic acid.
Cetyl Alcohol Applications
Tom qab C16H33OH cawv tau kawm ntau yam ntxiv, cov neeg sawv cev ntawm kev lag luam tshuaj pleev ib ce tau nyiam nws. Tom qab ntawd, nws tau siv los ua ntau yam tshuaj pleev (piv txwv li, los tiv thaiv kev kub hnyiab), lubricants, tshuaj, surfactants, xab npum, kuab tshuaj thiab plasticizers.
Tsis tas li ntawd, cetyl cawv yog siv los ua ib qho tshuaj zoo heev rau cov tshuaj zawv plaub hau, tshuaj pleev thiab cov plaub hau txias. Raws li ib tug co-emulsifier, nws yog siv nyob rau hauv zus tau tej cov khoom depilatory rau cov poj niam, antiperspirants, cosmetic cream thiab txhua yam ntawm lub qhov ncauj qhov ntswg.
Vim nws cov tshuaj tua kab mob, C16H33OH feem ntau yog siv los ntxuav cov tshuaj pleev ib ce thiab lwm yam khoom siv hauv lub cev thiab tawv nqaij. Nws lathers zoo thiab txhim kho qhov ruaj khov ntawm cov npuas dej hauv cov khoom zoo sib xws.
piav qhia txog yam khoom
Cawv C16H33OH ntawm hom no tsis yog nyob rau hauv cov kua, tab sis nyob rau hauv ib tug khoom lub xeev. Visually, nws zoo ib yam li cov tawv nqaij dawb, siv quav ciab lossis paraffin, uas tsis muaj saj thiab tsis hnov tsw. Nws tsis yaj hauv dej, tab sis melts yooj yim thiab hardens kuj sai nrog qee qhov poob ntawm nws cov duab qub. Muaj peev xwm muab khaws cia thiab tsis poob nws qhov zoo nyob rau hauv txhua yam kev mob.
Melting and boiling point of cawv
Cetyl cawv, zoo li yuav luag txhua yam khoom, tuaj yeem ua mos. Txawm li cas los xij, qhov no tsis yog ib qho yooj yim ua, txij li lub melting point ntawm cov tshuaj no yog 54.6 ° C. Qhov tseem ceeb, C16H33OH tuaj yeem raug coj mus rau lub rhaub. Qhov ntawd tsuas yog nws yuav tsum tau ua kom sov ntau dua, tsawg kawg txog 270, thiab txawm tias mus txog 344, 0 ° C.
cawv muaj txiaj ntsig dab tsi?
Palmitic cawv muaj ntau cov txiaj ntsig zoo uas tsuas yog hloov tsis tau hauv kev tsim tshuaj, tshuaj thiab tshuaj pleev ib ce. Piv txwv li, cov cawv no yog ntuj tsim, vim nws muaj lub hauv paus chiv keeb thiab tsim los ntawm cov khoom siv cog.
Lub ntsiab lus tseem ceeb thib ob: cetyl cawv (hauv tshuaj pleev ib ce nws yog siv los ua ke ntau yam hauv cov tshuaj pleev, tshuaj pleev thiab lwm yam kua) yog ib qho zoo heev viscosity regulator los yog stabilizer thiab cov thickener zoo. Piv txwv li, yog tias nws tsis tau ntxiv, tom qab ntawd sai lossis tom qab qhov no lossis cov khoom siv tshuaj pleev ib ce yuav plam nws cov khoom qub thiab poob rau hauv cov khoom. Tab sis lub sijhawm no, cawv tsis ua cov tshuaj nplaum ntau dhau, ntawm qhov tsis sib xws, lawv tig los ua ib txwm sib xws.
Nws yog cawv, uas yog ib feem ntawm ntau cov tshuaj nplaum, uas ua rau lawv muaj cov qauv tuab uas yooj yim hardens thaum txias, tsis kis thiab sai sai absorbed. Thaum siv rau hauv cov tshuaj pleev ib ce rau lub taub hau, C16H33OH pab txhim kho cov plaub hau zoo nkauj, pab txhawb cov txheej txheem ntawm cov plaub hau tshem tawm.sib pab.
Kuv puas tuaj yeem yuav cawv cais?
Cov kiv cua ntawm kev ua cov tshuaj pleev ib ce hauv tsev feem ntau yuav cov khoom xyaw sib txawv. Cetyl, lossis palmitic, cawv kuj tuaj yeem yuav. Nws yog muag, raws li txoj cai, nyob rau hauv cov pob me me los ntawm 50 mus rau 1000 grams nyob rau hauv daim ntawv ntawm cov khoom granules. Tsawg dua pom ntawm muag los ntawm qhov hnyav.
Cov txiaj ntsig ntawm cetyl cawv yog dab tsi?
Cetyl yog cov cawv muaj roj nrog ntau qhov zoo. Piv txwv li, nws tsis ua rau muaj kev tsis haum tshuaj, yog li ntawd, tshuaj pleev ib ce nrog C16H33OH tuaj yeem siv los ntawm cov neeg uas muaj cov tawv nqaij rhiab tshaj plaws. Nws yog absorbed zoo thiab nkag mus tob rau hauv qhov chaw ntawm lub epidermis, muab cov khoom noj muaj txiaj ntsig zoo. Tsis tas li ntawd, cawv zoo li qhwv koj cov tawv nqaij nrog cov yeeb yaj kiab tiv thaiv uas tsis pom ntawm qhov muag liab qab. Qhov no yog ib hom kev thaiv uas pab tiv thaiv koj lub cev los ntawm teeb meem ultraviolet rays.
Ntawm lwm yam, cov tshuaj no zoo kawg nkaus tua cov kab mob ntawm daim tawv nqaij, ua raws li cov tshuaj tua kab mob tsis muaj zog. Piv txwv li, nrog nws cov kev pab, qhov txhab me me, khawb thiab txiav kom zoo sai dua.
Puas muaj qhov tsis zoo rau cawv?
Muaj kev xav tias cawv ua rau daim tawv nqaij qhuav. Yog li ntawd, ntau tus poj niam tsis nyiam yuav cov tshuaj pleev ib ce, uas suav nrog, piv txwv li, cetyl cawv. Kev puas tsuaj, nyob rau hauv lawv lub tswv yim, nws coj tsis tau tsuas yog cov tawv nqaij, tab sis kuj cov qog sebaceous, uas nqaim thiab clogs. Txawm li cas los xij, qhov kev xav no yog qhov yuam kev, vim tias cov tshuaj no tsis muaj qhov cuam tshuam zoo sib xws.khoom. Ntawm qhov tsis sib xws, nws pab txo qhov pores thiab haum rau yuav luag txhua hom tawv nqaij.
Ntxiv rau, nws yog C16H33OH uas zoo kawg nkaus moisturizes epidermis, khaws cov dej noo tsim nyog hauv nws thiab ua rau nws elastic, velvety rau qhov kov.
Raws li kev tshawb fawb tsis ntev los no ntawm cetyl cawv los ntawm Cosmetic Ingredient Review Group, hom tshuaj no muaj kev nyab xeeb tag nrho. Nws tsis pom muaj toxicity, tsis nkag mus rau hauv cov tshuaj tiv thaiv oxidation, yog li nws tuaj yeem siv los ua ib qho ntawm cov khoom xyaw ntawm lub Hoobkas tsim thiab cov tshuaj pleev ib ce hauv tsev.
Puas muaj cov contraindications rau kev siv cetyl cawv?
Txawm hais tias muaj cov npe loj ntawm cov txiaj ntsig zoo, kev siv cov cawv cawv muaj qee qhov contraindications. Tshwj xeeb, nws yuav tsum tsis txhob siv los ntawm cov neeg uas muaj ib tus neeg intolerance rau cov ntsiab lus ntawm cawv.
