Sodium bicarbonate, dawb endothermic foaming tus neeg sawv cev, plays lub luag haujlwm tseem ceeb hauv foaming ntawm cov khoom lag luam. Nws cov khoom tshwj xeeb ntawm lub cev thiab tshuaj lom neeg ua rau nws siv dav hauv ntau yam xws li roj hmab, daim txhuam cev, thiab lub tsev rwb thaiv tsev. Tsab ntawv xov xwm no yuav tshawb xyuas kom meej txog cov ntawv thov foaming thiab qhov zoo ntawm sodium bicarbonate hauv cov cheeb tsam no. Raws li ib tug foaming neeg sawv cev, sodium bicarbonate muaj ib tug tshwj xeeb lub ntiajteb txawj nqus ntawm 2.16 thiab ib tug decomposition kub ntawm kwv yees li 100-140 degree . Thaum lub sij hawm decomposition, nws tso tawm qee qhov CO2, muab cov roj av ruaj khov rau cov txheej txheem foaming, uas ua rau lub cev tsis sib xws thiab zoo ntawm tes. Thaum qhov kub siab tshaj 270 degree, sodium bicarbonate maj mam poob CO2, nrog cov roj tso tawm ntim ntawm 115 ± 5 ml / g (STP). Cov txheej txheem decomposition du no tsis cuam tshuam rau cov cuab yeej tsim khoom, thiab txij li cov khoom decomposition yog dawb, nws tsis cuam tshuam cov xim ntawm cov khoom kawg. Yog li, sodium bicarbonate muab cov txiaj ntsig zoo foaming rau cov khoom lag luam.
Hauv kev lag luam roj hmab, lub luag haujlwm foaming ntawm sodium bicarbonate yog qhov tseem ceeb. Txij li thaum nws cov khoom decomposition yog feem ntau CO2 thiab tsis cuam tshuam rau cov khoom siv, nws yog dav siv hauv kev tsim cov khoom siv roj hmab. Tsis tas li ntawd, cov khoom decomposition ntawm sodium bicarbonate yog dawb, yog li nws tsis cuam tshuam rau cov xim ntawm cov khoom siv roj hmab. Cov khoom no ua rau sodium bicarbonate qhov kev xaiv zoo tshaj plaws ua tus neeg sawv cev foaming hauv kev lag luam roj hmab.
Hauv kev lag luam plastics, sodium bicarbonate kuj ua lub luag haujlwm tseem ceeb. Siv cov ntaub ntawv polypropylene (PP) tshuaj foaming ua piv txwv, los ntawm kev siv cov txheej txheem kaw-pwm foaming txhaj tshuaj molding thiab sib tov PP / LDPE blends, stearic acid-hloov sodium bicarbonate (NaHCO3), thiab nano-calcium carbonate (nano-CaCO3), cov ntaub ntawv nrog zoo heev foaming kev ua tau zoo tuaj yeem tsim tau. Cov ntaub ntawv no tsis tsuas yog muaj qhov hnyav txo qhov hnyav thiab muaj zog muaj zog tab sis kuj tsim cov qauv zoo nkauj thiab zoo ntawm tes thaum lub sijhawm ua npuas dej, yog li txhim kho qhov zoo thiab kev ua haujlwm ntawm cov khoom.
Hauv kev tsim kho kev lag luam, sodium bicarbonate kuj ua lub luag haujlwm tseem ceeb ua tus neeg sawv cev foaming. Piv txwv li, hauv foamed cement, los ntawm kev siv cov khoom sib xyaw silicate ua cov khoom siv cementitious thiab sodium bicarbonate thiab aluminium sulfate ua cov neeg ua npuas dej, foamed cement tuaj yeem ua tiav. Qhov no foamed cement yog lub teeb yuag thiab muaj cov thermal rwb thaiv tsev, ua rau nws siv dav hauv cov phab ntsa uas tsis yog-loading ntawm cov tsev siab. Los ntawm kev txo qis kev siv hluav taws xob hauv tsev, txo cov khoom ntawm cov tsev siab siab, thiab txhim kho kev ruaj ntseg ntawm cov hauv paus, kev siv sodium bicarbonate hauv kev tsim kho kev lag luam coj ntau yam txiaj ntsig rau niaj hnub architecture.
Hauv cov teb xws li cov ntaub ntawv polyethylene ua npuas ncauj, cov ntaub ntawv polycaprolactone ntxeem tau, thiab PVC / PS tsawg-ua npuas ncauj profiles thiab nplooj ntawv, sodium bicarbonate kuj ua lub luag haujlwm tseem ceeb. Los ntawm kev sib txuas nrog lwm cov ntaub ntawv, sodium bicarbonate tuaj yeem tsim cov khoom foamed nrog kev ua tau zoo, ua tau raws li qhov xav tau ntawm ntau qhov chaw.
Nyob rau hauv xaus, raws li ib tug raug inorganic endothermic foaming neeg sawv cev, sodium bicarbonate muaj ntau yam kev siv nyob rau hauv lub foaming ntawm industrial cov khoom. Nws cov khoom tshwj xeeb ntawm lub cev thiab tshuaj lom neeg ua rau nws siv dav hauv ntau yam xws li roj hmab, daim txhuam cev, thiab lub tsev rwb thaiv tsev. Los ntawm kev tshawb fawb tob rau hauv cov txheej txheem foaming thiab kev siv cov txheej txheem ntawm sodium bicarbonate, nws yuav tsum muab cov kev daws teeb meem zoo dua thiab ruaj khov rau cov foaming ntawm cov khoom lag luam.
