Naphthalene Raws li Superplasticizer Hmoov

Naphthalene Raws li Superplasticizer Hmoov
Kev loj hlob ntawm Naphthalene Superplasticizer

Naphthalene superplasticizers yog ib hom kev ua haujlwm siab dej-txo admixtures siv hauv pob zeb. Lawv yog cov hluavtaws polymers raws li naphthalene sulfonates thiab muaj kev sib cais siab hauv dej. Txoj kev loj hlob ntawm naphthalene superplasticizers tau ua ib qho kev nce qib tseem ceeb hauv kev siv tshuab ua vaj tse.

Kev txhim kho thaum ntxov ntawm naphthalene superplasticizers tuaj yeem taug qab rov qab mus rau xyoo 1930s thaum cov kws tshawb fawb pom tias naphthalene tuaj yeem siv los ua cov tshuaj tua kab mob zoo hauv kev tsim cov khoom siv xim thiab xim. Nyob rau xyoo 1950, kev siv naphthalene ua ib qho dej txo qis hauv cov pob zeb tau pom los ntawm cov kws tshawb fawb German. Qhov kev tshawb pom no tau ua rau kev txhim kho ntawm naphthalene-based superplasticizer hu ua sulphonated naphthalene formaldehyde (SNF).

Hauv cov xyoo tom ntej, lwm cov naphthalene-based superplasticizers tau tsim, xws li sodium naphthalene sulfonate (NSF) thiab sulphonated naphthalene melamine formaldehyde (SNF / MF). Cov superplasticizers tshiab no tau txhim kho cov yam ntxwv zoo xws li kev ua kom muaj peev xwm txo tau dej thiab ua tau zoo dua nrog cov cement.

Kev txhim kho ntawm naphthalene superplasticizers tau nce ntxiv nrog kev qhia txog kev hloov kho naphthalene-based superplasticizers. Cov kev hloov kho superplasticizers no tau tsim los ntawm kev ntxiv cov pab pawg ua haujlwm rau naphthalene sulfonate molecules, uas ua rau muaj kev ua tau zoo dua qub xws li muaj zog dispersibility thiab txhim kho lub zog thiab durability ntawm pob zeb.

Tam sim no, naphthalene superplasticizers tau siv dav hauv kev tsim kho kev lag luam vim lawv cov yam ntxwv zoo tshaj plaws. Lawv yog siv los txhim kho kev ua haujlwm ntawm pob zeb, txo cov ntsiab lus ntawm cov dej, thiab ua kom lub zog thiab kav ntev ntawm cov pob zeb ua vaj tse. Kev tshawb fawb tsis tu ncua thiab kev txhim kho ntawm naphthalene superplasticizers txuas ntxiv txhim kho lawv cov kev ua tau zoo thiab nthuav dav lawv cov kev siv ntau yam.