Vim li cas calcium carbonate (CaCO3) ntxiv rau cov hnab biodegradable?
Jul 11, 2024
Txawm hais tias PBAT muaj kev ua tau zoo heev, nws kim heev, thiab cov teeb meem xws li tensile lub zog thiab qis modulus kuj txwv nws daim ntawv thov. Calcium carbonate (CaCO3) yog muab los ntawm cov xwm thiab yog pheej yig, ntau thiab ntau yam. Kev siv calcium carbonate raws li cov yas ntxiv tuaj yeem txo cov nqi tsim khoom zoo thaum tswj xyuas cov khoom zoo ntawm cov yas matrix.
Muaj ntau pawg hydroxyl nyob rau saum npoo ntawm calcium carbonate, uas muaj kev sib raug zoo nrog cov organic polymer cov ntaub ntawv, thiab yooj yim rau agglomerate thaum nws ncav cuag ib tug fineness, yog li kev hloov kho saum npoo yog qhov tsim nyog pab txhais tau tias. Tam sim no, titanate thiab silane tau siv dav siv cov khoom sib txuas, ntawm cov uas titanate yog ib qho proton reactant uas tsis xav tau dej condensation, silane yog hydroxyl reactant uas xav tau dej condensation, thaum calcium carbonate nrog PBAT, siloxane tuaj yeem ua rau CaCO3 thiab Cov dej molecules tseem tshuav ntawm qhov chaw ntawm PBAT, uas tuaj yeem ua rau qeeb qeeb ntawm cov saw hlau molecular, uas yog heev haum rau kev txhawb zog thiab kev hloov kho daim ntawv thov.