Ifu ya redispersible latex ni ibikoresho bisanzwe bikoreshwa muburyo bwa gelling. Ni ifu yabonetse mugutera spray-yumye polymer emulion hamwe na alcool ya polyvinyl nka colloid ikingira. Iyi poro irashobora gukwirakwizwa mumazi nyuma yo guhura namazi. , gukora emulisiyo. Ongeramo ifu ya redxersible latex irashobora kunoza imikorere yo gufata amazi ya sima ivanze ya sima nshya, hamwe nuburyo bwo guhuza, guhinduka, kudahinduka no kurwanya ruswa ya sima ikomeye.
Ingaruka yifu ya latexr kumubano wibikoresho bishingiye kuri sima
Emulsion na redispersible latex ifu irashobora gukora imbaraga zingirakamaro hamwe nimbaraga zo guhuza kubikoresho bitandukanye nyuma yo gukora firime, zikoreshwa nka binder ya kabiri muri minisiteri kugirango ihuze na sima ya sima, sima na polymer. imikorere ya minisiteri. Iyo witegereje microstructure yibikoresho bya polymer-sima yibikoresho, byizerwa ko kongeramo ifu ya latxersible redxersible ishobora gutuma polymer ikora firime kandi igahinduka igice cyurukuta rwumwobo, kandi igakora minisiteri yose ikoresheje imbaraga zimbere, itezimbere imbaraga zimbere za minisiteri. Imbaraga za polymer, bityo zitezimbere kunanirwa kwa minisiteri no kongera imbaraga zanyuma. Imikorere ndende ya redispersible latex powder muri minisiteri yarizwe. Byagaragaye na SEM ko nyuma yimyaka 10, microstructure ya polymer muri minisiteri idahindutse, kandi guhuza byimazeyo, guhuza no guhuza imbaraga byakomeje. imbaraga hamwe no kurwanya amazi meza. Ifu ya redispersible latex yize uburyo bwo gukora imbaraga zifata tile, isanga ko polymer imaze gukama igakorwa muri firime, firime ya polymer ikora ihuza ryoroshye hagati ya minisiteri na tile kuruhande rumwe, no kuruhande rwa kurundi ruhande, marimari mashya Polimeri yo hagati yongerera umwuka umwuka wa minisiteri kandi ikagira ingaruka kumiterere nubushuhe bwubuso, hanyuma nyuma mugihe cyo gushiraho, polymer nayo igira ingaruka nziza kubikorwa byo kugabanuka no kugabanuka kwa sima muri binder, Ibi byose bizafasha kunoza imbaraga zubumwe.
Ongeramo ifu ya redxersible latex kuri minisiteri irashobora kunoza cyane imbaraga zo guhuza nibindi bikoresho, kubera ko ifu ya hydrophilique latex hamwe nicyiciro cyamazi cyo guhagarika sima yinjira mumyenge na capillaries ya matrix, hanyuma ifu ya latx ikinjira mumyenge na capillaries. . Filime y'imbere irakozwe kandi irashimangirwa neza hejuru yubutaka, bityo bigatuma imbaraga zifatika zihuza ibikoresho bya sima na substrate.
Gutezimbere ifu ya latex kumikorere ya minisiteri biterwa nuko ifu ya latex ari polymer ndende ya polymer hamwe nitsinda rya polar. Iyo ifu ya latex ivanze nuduce twa EPS, igice kitari polarike mumurongo wingenzi wa porojeri ya latx polymer kizaba umubiri wa adsorption uzaba hamwe nubuso butari inkingi ya EPS. Amatsinda ya polar muri polymer yerekejwe hanze hejuru yubuso bwa EPS, kuburyo ibice bya EPS bihinduka kuva hydrophobicity bikagera kuri hydrophilique. Bitewe no guhindura ubuso bwa EPS ukoresheje ifu ya latex, ikemura ikibazo ko uduce twa EPS dushobora guhura namazi byoroshye. Kureremba, ikibazo cyurwego runini rwa minisiteri. Muri iki gihe, iyo sima yongewemo ikavangwa, amatsinda ya polar yamamajwe hejuru yubutaka bwa EPS akorana nuduce twa sima kandi agahuza hafi, kuburyo imikorere ya minisiteri ya EPS itera imbere cyane. Ibi bigaragarira mubyukuri ibice bya EPS bihanagurwa byoroshye na sima paste, kandi imbaraga zihuza zombi zateye imbere cyane.
Igihe cyo kohereza: Werurwe-14-2023