Hydroxyethylcellulose (HEC) yog ib hom dej-soluble polymer uas siv dav hauv cov tshuaj pleev ib ce thiab cov khoom tu tus kheej. Nws feem ntau yog siv los ua cov thickener, stabilizer thiab zaj duab xis qub nyob rau hauv ntau yam khoom tu tawv nqaij, tshuaj zawv plaub hau, da dej gels, tshuaj pleev ib ce, gels thiab lwm yam khoom. Nws txoj kev nyab xeeb tau txais kev saib xyuas thoob plaws hauv kev ua kom zoo nkauj.
Chemical zog thiab mechanism ntawm kev txiav txim
Hydroxyethylcellulose yog tsim los ntawm kev kho cellulose nrog sodium hydroxide thiab reacting nws nrog ethylene oxide. Cellulose yog polysaccharide ib txwm muaj nyob rau hauv cov nroj tsuag, thiab los ntawm cov txheej txheem no, cov dej solubility ntawm cellulose yog txhim khu kev qha, ua rau nws haum rau siv nyob rau hauv dej-raws li formulations. Hydroxyethylcellulose muaj cov nyhuv thickening zoo, uas tuaj yeem ua kom cov viscosity ntawm cov khoom, ua rau cov khoom smoother thiab yooj yim rau kev thov thaum siv. Tsis tas li ntawd, HEC kuj tseem ua cov yeeb yaj kiab thiab tuaj yeem tsim cov yeeb yaj kiab tiv thaiv ntawm daim tawv nqaij lossis plaub hau kom tsis txhob muaj dej evaporation thiab ua lub luag haujlwm moisturizing.
Kev nyab xeeb ntawm Hydroxyethyl Cellulose
Kev nyab xeeb ntawm hydroxyethyl cellulose tau raug soj ntsuam los ntawm ntau lub koom haum tso cai. Raws li kev soj ntsuam ntawm Cosmetic Ingredient Review Committee (CIR) hauv Teb Chaws Asmeskas thiab European Cosmetic Regulation (EC No 1223/2009), Hydroxyethylcellulose yog suav tias yog cov khoom zoo nkauj zoo nkauj. Tsis pub dhau qhov kev siv ntau npaum li cas, HEC tsis ua rau muaj kev phom sij rau tib neeg kev noj qab haus huv.
Kev tshawb fawb txog toxicological: Ntau cov kev tshawb fawb toxicological tau pom tias Hydroxyethylcellulose tsis ua rau tawv nqaij khaus lossis ua xua. Tsis muaj kev kuaj mob toxicity los yog kev ntsuam xyuas toxicity mus sij hawm ntev tsis tau pom HEC ua carcinogenic, mutagenic lossis cov tshuaj lom menyuam yaus. Yog li ntawd, nws yog dav suav hais tias yog ib qho me me thiab tsis muaj teeb meem rau daim tawv nqaij thiab qhov muag.
Kev nqus ntawm daim tawv nqaij: Vim nws qhov hnyav molecular loj, Hydroxyethylcellulose tsis tuaj yeem hla ntawm daim tawv nqaij thiab nkag mus rau hauv lub cev txoj kev ncig. Qhov tseeb, HEC tsim cov yeeb yaj kiab tiv thaiv tom qab siv, tshuav ntawm daim tawv nqaij yam tsis muaj kev nkag mus tob rau hauv daim tawv nqaij. Yog li ntawd, nws tsis ua rau muaj kev cuam tshuam rau tib neeg lub cev, uas ntxiv dag zog rau nws txoj kev nyab xeeb.
Kev nyab xeeb ib puag ncig: Hydroxyethylcellulose yog biodegradable nyob rau hauv ib puag ncig thiab yuav tsis ua rau muaj kuab paug mus ntev rau lub ecosystem. Nws ib puag ncig kev nyab xeeb kuj tau lees paub los ntawm cov koom haum tiv thaiv ib puag ncig.
Daim ntawv thov thiab kev ntsuas kev nyab xeeb hauv cov tshuaj pleev ib ce
Qhov concentration ntawm hydroxyethyl cellulose nyob rau hauv cov tshuaj pleev ib ce feem ntau yog tsawg, feem ntau ntawm 0.1% thiab 2%. Cov kev siv ntau npaum li no tau qis dua nws qhov kev paub txog kev nyab xeeb, yog li nws muaj kev nyab xeeb tag nrho los siv ntawm cov concentrations no. Vim nws qhov ruaj khov thiab zoo sib xws, HEC tau siv dav hauv ntau yam tshuaj pleev ib ce los txhim kho kev ntxhib los mos thiab cov neeg siv kev paub ntawm cov khoom.
Hydroxyethyl cellulose yog cov khoom siv dav siv thiab muaj kev nyab xeeb heev hauv cov tshuaj pleev ib ce. Txawm hais tias siv sijhawm luv luv lossis kev sib cuag mus ntev, HEC tsis qhia tias muaj kev phom sij rau tib neeg kev noj qab haus huv. Nyob rau tib lub sijhawm, nws cov phooj ywg ib puag ncig kuj ua rau nws muaj cov khoom zoo nkauj nrov niaj hnub no vim tias kev txhim kho kom ruaj khov thiab kev paub txog ib puag ncig tau maj mam nce. Cov neeg siv khoom tsis tas yuav txhawj xeeb txog nws txoj kev nyab xeeb thaum siv cov khoom uas muaj hydroxyethyl cellulose, thiab tuaj yeem txaus siab rau kev siv zoo heev thiab cov teebmeem uas nws coj.
Post lub sij hawm: Sep-02-2024