Dab tsi yog cov tshuaj zawv plaub hau tsis muaj sulfate thiab nws puas tsim nyog yuav

2024 Tus sau: Malcolm Clapton | [email protected]. Kawg hloov kho: 2023-12-17 03:58

Lawv kim dua, tab sis tus nqi tsis yog ib txwm muaj kev ncaj ncees.

Dab tsi yog cov tshuaj zawv plaub hau tsis muaj sulfate

Sulfates yog ntsev ntawm sulfuric acid. Lawv ntxiv rau cov tshuaj ntxuav tes, tshuaj zawv plaub hau thiab tshuaj txhuam hniav ua surfactants.

Molecules ntawm xws li tshuaj ib nrab repel dej (hydrophobic "tail") thiab ib nrab khi rau nws (hydrophilic "lub taub hau"). Thaum cov tshuaj zawv plaub hau siv rau cov plaub hau, cov plaub hau hydrophobic ntawm cov molecules ua ke nrog sebum los ua cov pob micelle. Cov txheej txheej ntawm lub pob no khi rau hauv dej thiab yooj yim ntxuav nrog roj thiab av.

Vim yog sulfates, cov tshuaj zawv plaub hau tsim ua npuas dej lush thiab ntxuav kom zoo ntawm sebum, cov tawv nqaij tuag thiab lwm yam impurities.

Feem ntau, peb hom sulfate surfactants yog siv hauv cov tshuaj zawv plaub hau:

• sodium lauryl sulfate (SLS);
• sodium laureth sulfate (SLES);
• ammonium lauryl sulfate (ALS).

Cov tshuaj zawv plaub hau tsis muaj sulfate, raws li lub npe qhia, tsis muaj sulfate surfactants teev saum toj no.

Puas yog sulfate tshuaj zawv plaub hau txaus ntshai rau cov plaub hau thiab kev noj qab haus huv?

Cov tshuaj zawv plaub hau tsis muaj sulfate yog muag raws li "tsis muaj teeb meem tshuaj". Cia peb xyuas seb sulfates puas tsim nyog ntshai.

Ua sulfates ua rau mob qog noj ntshav

Yav dhau los, cov tshuaj no tau xav tias muaj carcinogenicity - muaj peev xwm ua rau mob qog noj ntshav, tab sis cov kev cai no tau lees paub. American Council on Personal Care Products Cosmetic Ingredient Review (CIR) tau lees paub SLS SLS, SLES thiab ALS tias muaj kev nyab xeeb rau cov tawv nqaij luv luv thiab yaug nrog dej.

Tsis lees paub Sodium, ammonium thiab potassium lauryl sulfate: Tib neeg kev noj qab haus huv tier II kev tshuaj xyuas carcinogenicity thiab Australian tsoom fwv cov koom haum tshuaj ntsuam xyuas tshuaj. Nws kuj tau xaus lus tias sodium lauryl sulfate tsis cuam tshuam rau tib neeg kev ua haujlwm thiab kev loj hlob.

Cov sulfates puas tsim kev puas tsuaj rau tawv taub hau

SLS thiab ALS tuaj yeem ua rau khaus thiab qhuav ntawm daim tawv nqaij nrog Sodium, ammonium thiab potassium lauryl sulfate: Kev ntsuam xyuas tib neeg kev noj qab haus huv tier II, tab sis qhov no yuav tsum tau muaj ntau ntau thiab raug mus ntev. Piv txwv li, thaum 25% SLS tau siv rau ntawm daim tawv nqaij ntawm luav, khaus tsis tshwm sim txog 4 teev tom qab. Hauv tib neeg, cov teebmeem tsis zoo tshwm sim tom qab kev sim nrog 2% sodium lauryl sulfate. Thaum txoj kev tshawb no, cov tshuaj nyob ntawm daim tawv nqaij rau 24-48 teev.

SLES - me ntsis Sodium thiab ammonium laureth sulfate: Tib neeg kev noj qab haus huv tier II kev soj ntsuam surfactant. Nws kuj tuaj yeem ua rau tawv nqaij thiab daim tawv nqaij, tab sis tsawg dua li SLS. Cov teebmeem tshwm sim tshwm sim ntawm 18% concentration thiab raug rau ntawm daim tawv nqaij rau 24 teev. Tsis tas li ntawd, sodium laureth sulfate tsis qhuav tawm ntawm daim tawv nqaij.

Thaum ntxuav koj cov plaub hau, cov tshuaj zawv plaub hau yog nyob rau hauv kev sib cuag nrog daim tawv nqaij rau ib lub sij hawm luv luv ua mob.

Yog li ntawd, sulfates yuav tsum tsuas yog ntshai rau cov neeg uas muaj tawv nqaij rhiab, ua xua lossis kab mob ntawm daim tawv nqaij.: rosacea, eczema thiab tiv tauj dermatitis.

Cov sulfates tuaj yeem ua rau cov plaub hau puas

Yog hais tias cov plaub hau noj qab nyob zoo, sulfates tsis nkag mus rau hauv lub cortex - lub puab txheej ntawm cov plaub hau. Lawv cov nyhuv yog txwv rau lub cuticle - cov nplais txheej, txheej zoo li ib tug shingle. Cov tshuaj zawv plaub hau yuav yooj yim tshem tawm ntau sebum nrog cov av thiab ntxuav kom zoo.

Txawm li cas los xij, yog tias cov plaub hau qhuav thiab tsis muaj zog, piv txwv li, tom qab perm lossis lightening, sulfate tsuaj zawv plaub hau tuaj yeem "Tau dhau qhov hype: Dermatologist untangles ntau cov kev xav tsis zoo ntawm cov plaub hau" ua rau lawv ntau dua: tawg lub cuticle "disheveled" thiab nkag mus rau hauv cov plaub hau. plaub hau. Tsis tas li ntawd, cov curls qhuav yog qee zaum cuam tshuam los ntawm kev tshem tawm tag nrho ntawm sebum - sebum, uas tiv thaiv cov plaub hau los ntawm ib puag ncig sab nraud.

Puas muaj tseeb tias sulfates ua rau cov plaub hau frizz

Sulfate surfactants yog anionic. Qhov no txhais tau hais tias nyob rau hauv dej lawv tawg mus rau hauv tsis zoo nqi ions. Tom qab ntxuav, ib tug tsis zoo nqi nyob rau hauv cov plaub hau, yog li ntawd lawv repel ib leeg thiab cov plaub hau frizzes.

Txawm li cas los xij, ntxiv rau anionic surfactants, cov tshuaj zawv plaub hau sulfate tuaj yeem muaj cationic (nrog rau tus nqi zoo), amphoteric (yuav ua tau zoo thiab tsis zoo, nyob ntawm thaj chaw pH) thiab nonionic (tsis txhob decompose rau hauv ions thiab tsis nqa tus nqi). Cov tshuaj no neutralize tus nqi tsis zoo.

Cov nyhuv ntawm cov plaub hau fluffy nyob ntawm cov tshuaj zawv plaub hau tshwj xeeb, thiab tsis yog nyob ntawm qhov muaj sulfates hauv nws.

Puas yog sulfates tiag tiag ua rau cov plaub hau zoo li npub thiab matted?

Cov plaub hau yog tangled, combed tsis zoo thiab zoo li npub vim tib yam "disheveled" cuticle. Thaum cov nplais haum snugly tiv thaiv lub cortex, cov curls yog du, pom lub teeb zoo thiab yog li ci. Yog hais tias lub cuticle nce, cov plaub hau cling rau ib leeg.

Sulfate zawv plaub hau yuav tsis ua mob rau cov plaub hau noj qab haus huv, thiab lawv qhov tsis tuaj yeem yuav tsis kho cov plaub hau puas.

Qhov tsuas yog qhov uas tuaj yeem pab tau yog cov tshuaj ua kom txias hauv cov khoom. Cov chaw tsim khoom tuaj yeem ntxiv cov tshuaj zawv plaub hau thiab cov tshuaj pleev ib ce: Tus kws kho hniav yuav tsum paub dab tsi? rau hauv tshuaj zawv plaub hau hydrolyzed txhob lo lo ntxhuav los yog tsiaj protein, glycerin, dimethicone, polyvinylpyrrolidone, propylene glycol thiab lwm yam khoom uas ntim cov plaub hau, ua rau lawv ci ci.

Yog tias cov tshuaj zawv plaub hau tsis muaj sulfate tsuas muaj cov tshuaj ntxuav tes me me thiab ntau yam khoom siv ntuj tsim, qhov no yuav tsis pab cov plaub hau puas kom zoo thiab zuag.

Puas muaj tseeb tias sulfates ua rau cov plaub hau oily?

Tus nqi ntawm sebum yog tsim los ntawm cov yam ntxwv ntawm cov qog, cov tshuaj hormones thiab kev noj haus ntawm sebaceous gland lipids. Tsis muaj pov thawj hais tias kev raug sulfate nce sebum ntau lawm.

Ua sulfates ntxuav cov xim thiab keratin

Ntxiv nrog rau sebum, tshuaj zawv plaub hau sulfate ntseeg tau sai sai tshem tawm cov xim thiab keratin ntawm cov plaub hau.

Tau dhau qhov hype: Dermatologist untangles ntau cov kev saib xyuas plaub hau tsis zoo tsis muaj pov thawj tshawb fawb. Txawm li cas los xij, tom qab keratin straightening, cov kws kho plaub hau xav kom ntxuav koj cov plaub hau xwb nrog tshuaj zawv plaub hau tsis muaj sulfate.

Dab tsi hloov sulfate surfactants hauv tshuaj zawv plaub hau tsis muaj sulfate

Ntxiv rau cov tshuaj zawv plaub hau tsis muaj sulfate:

• me me anionic surfactants: sodium laureth-5 carboxylat Cov mis tshiab rau lub cev ntxuav me me: sodium laureth sulphate ntxiv nrog sodium laureth carboxylate thiab lauryl glucoside, disodium laureth sulfosuccinate, sodium lauryl sarcosinate, lauryl sarcosine;
• cationic surfactants: trimethylalkylammonium chloride, benzalkonium cloride, alkylpyridinium ions, cetyltrimethylammonium chloride;
• amphoteric surfactants: alkyl iminopropionates, betaines, piv txwv li, cocamidopropyl betaine, sodium lauraminopropionate;
• nonionic surfactants: coco glucoside, lauryl glucoside, decyl glucoside, fatty alcohols, cetyl cawv, stearyl cawv, cetostearyl cawv, oleyl cawv, polyoxyethylene fatty alcohols, polyoxyethylene sorbitol esters, alkanolamides.

Raws li txoj cai, ob lossis peb tus surfactants ntxiv rau cov tshuaj zawv plaub hau, piv txwv li, ob lub anionic (rau foaming thiab zoo tu) thiab ib qho cationic los yog non-ionic (kom soften cov muaj pes tsawg leeg thiab tshem tawm cov nqi tsis zoo).

Kuj tseem muaj cov tshuaj zawv plaub hau uas tsis muaj anionic surfactants txhua. Lawv yog cov mos li ua tau, haum rau cov menyuam yaus thiab cov neeg uas muaj tawv nqaij rhiab heev. Txawm li cas los xij, xws li formulations tsis zoo nrog roj thiab av.

Leej twg yuav tsum yuav tshuaj zawv plaub hau tsis muaj sulfate

Koj yuav tsum xyuam xim rau lawv yog tias:

• koj muaj cov plaub hau qhuav, nkig thiab puas, thiab koj ntshai ua kom puas nws ntau dua;
• koj muaj cov tawv nqaij rhiab heev rau khaus lossis tawv taub hau teeb meem.

Cov tshuaj zawv plaub hau tsis muaj sulfate raug nqi tsawg kawg yog ob zaug ntawm tus nqi ntawm cov khoom nrog sulfate surfactants. Nyob rau tib lub sijhawm, cov plaub hau tsis kho txhua, thiab thaum tsis muaj cov tshuaj, nws tsis txhim kho nws cov tsos.