Starch etherified bụ stachi nọchiri anya ether nke emere site na mmeghachi omume nke otu hydroxyl na mkpụrụ ndụ starch nwere ihe na-arụ ọrụ, gụnyere stachi hydroxyalky, carboxymethyl starch na cationic starch. Ebe ọ bụ na etherification nke starch mma na viscosity kwụsie ike na ether nkekọ na-adịghị mfe hydrolyzed n'okpuru ike alkaline ọnọdụ, etherified starch na-eji n'ọtụtụ ụlọ ọrụ ubi. Carboxymethyl starch (CMS) bụ a denatured ụdị anionic eke ngwaahịa na eke polymer polyelectrolyte ether soluble na mmiri oyi. Ka ọ dị ugbu a, ejirila cMS mee ihe n'ọtụtụ ebe na nri, ọgwụ, mmanụ ala, kemịkalụ kwa ụbọchị, akwa akwa, imepụta akwụkwọ, nrapado, na ụlọ ọrụ agba. nke
N'ime ụlọ ọrụ nri, CMS anaghị egbu egbu na enweghị mmerụ ahụ mmadụ ma nwee ike iji ya mee ihe dị mma. Ngwaahịa emechara nwere ọdịdị dị mma, agba na uto, na-eme ka ọ dị nro, oke na nghọta; A pụkwara iji CMS mee ihe dị ka ihe nchekwa nri. Na ụlọ ọrụ ọgwụ, CMS na-eji dị ka mbadamba disintegrant, plasma volume expander, thickener maka achicha-ụdị nkwadebe na ọgwụ dispersant maka ọnụ suspoemulsion. A na-eji CMS eme ihe n'ọtụtụ ebe na ụlọ ọrụ mmanụ dị ka ihe na-ebelata mmiri mmiri apịtị. Ọ nwere nguzogide nnu, nwere ike iguzogide nnu ruo saturation, ma nwee mmetụta na-egbochi slump na ụfọdụ ikike calcium. Ọ bụ ihe na-ebelata mfu mmiri dị elu. Otú ọ dị, n'ihi nkwụsị okpomọkụ na-adịghị mma, enwere ike iji ya na arụ ọrụ olulu mmiri na-emighị emi. A na-eji CMS eme ihe maka nha nke obere yarn, ma nwee njirimara nke mgbasa ngwa ngwa, ihe na-emepụta ihe nkiri dị mma, ihe nkiri dị nro na nke dị mfe. A pụkwara iji CMS mee ihe dị ka tackifier na modifier n'ụdị mbipụta dị iche iche na ịcha akwa. A na-eji CMS mee ihe dị ka ihe nkwụnye na mkpuchi akwụkwọ, nke nwere ike ime ka mkpuchi ahụ nwee ọkwa dị mma na nkwụsi ike viscosity. Ngwongwo njide mmiri ya na-achịkwa ntinye nke nrapado n'ime akwụkwọ mpempe akwụkwọ, na-enye akwụkwọ a na-ekpuchi ya nke ọma na-ebipụta akwụkwọ. Na mgbakwunye, CMS nwekwara ike iji dị ka viscosity reducer maka coal slurry na mmanụ-coal agwakọta mmanụ ụgbọala slurry, nke mere na ọ nwere ezi nkwusioru emulsion kwụsie ike na fluidity. A pụkwara iji ya mee ihe dị ka ihe mgbochi maka agba latex nke dabeere na mmiri, onye na-emepụta ihe na-eme ka ọ dị arọ maka ọgwụgwọ nsị nsị ígwè, na ihe na-ehicha akpụkpọ ahụ n'ihe ịchọ mma. Njirimara anụ ahụ ya bụ ndị a:
Uru PH: Alkaline (5% ngwọta mmiri mmiri) Solubility: Enwere ike ịgbaze na mmiri oyi Ịdị mma: Ihe na-erughị 500μm viscosity: 400-1200mpas (5% ngwọta mmiri mmiri) Nkwekọrịta na ihe ndị ọzọ: Ọ dị mma na ihe ndị ọzọ na-ewu ụlọ admixtures ndakọrịta
1. Isi ọrụ
Ike dị oke ngwa ngwa ngwa ngwa: viscosity ọkara, njigide mmiri dị elu;
Usoro onunu ogwu dị obere, na usoro ọgwụgwọ dị oke ala nwere ike nweta mmetụta dị elu;
Meziwanye ikike mgbochi sag nke ihe n'onwe ya;
Ọ nwere mmanu mmanu, nke nwere ike imeziwanye arụmọrụ nke ihe onwunwe ma mee ka ọrụ ahụ dị nro. nke
2. oke ojiji
Starch ether dabara maka ụdị niile (ciment, gypsum, lime-calcium) ime na mpụta mgbidi putty, na ụdị niile nke na-eche ihu ngwa agha na plasta ngwa agha. Usoro onunu ogwu akwadoro: 0.05% -0.15% (a tụrụ ya na tọn), ojiji a kapịrị ọnụ dabere na oke nha. Enwere ike iji ya dị ka ihe mgbakwunye maka ngwaahịa simenti, ngwaahịa gypsum na ngwaahịa lime-calcium. Starch ether nwere ezigbo ndakọrịta na ihe ndị ọzọ na-ewu na admixtures; ọ dị mma karịsịa maka ihe nrụpụta akọrọ akọrọ dị ka ngwa agha, adhesives, plasta na ihe ntụgharị. Starch ethers na methyl cellulose ethers (Tylose MC grades) na-eji ọnụ na-ewu akọrọ mixes inye elu ndim, ike Ọdịdị, sag iguzogide na mfe njikwa. Enwere ike ibelata viscosity nke ngwa agha, nrapado, plasta na akwụkwọ mpịakọta nwere ethers methyl cellulose dị elu site na mgbakwunye nke starch ethers. nke
3. Nhazi nke starch ethers
A na-emezi ethers starch eji na ngwa agha site na polymer eke nke ụfọdụ polysaccharides. Dị ka poteto, ọka, akpu, agwa agwa na ihe ndị ọzọ. nke
starch emezigharịrị izugbe
Starch ether emegharịrị site na nduku, ọka, akpu, wdg nwere njide mmiri dị ala karịa cellulose ether. N'ihi mgbanwe dị iche iche nke mgbanwe, nkwụsi ike na acid na alkali dị iche. Ụfọdụ ngwaahịa dị mma maka iji ngwa agha gypsum, ebe ndị ọzọ nwere ike iji ya mee ihe na ciment. Ngwa nke starch ether na ngwa agha na-ejikarị eme ihe dị ka ihe na-esi ísì ụtọ iji meziwanye ihe mgbochi nke ngwa agha, belata nrachi nke ngwa agha mmiri, na ịgbatị oge mmeghe. A na-ejikarị ethers starch eme ihe na cellulose, nke mere na njirimara na uru nke ngwaahịa abụọ a na-ejikọta ibe ha. Ebe ọ bụ na ngwaahịa starch ether dị ọnụ ala karịa cellulose ether, ntinye nke starch ether na ngwa agha ga-eweta mbelata dị ukwuu na ọnụahịa nke ngwa ngwa. nke
gua ether
Guar gum ether bụ ụdị starch ether nwere ihe pụrụ iche, nke a na-agbanwe site na agwa agwa gua. tumadi site na mmeghachi omume etherification nke guar gum na acrylic functional group, a na-emepụta usoro nwere 2-hydroxypropyl na-arụ ọrụ, nke bụ usoro polygalactomannose.
(1) E jiri ya tụnyere cellulose ether, guar gum ether bụ ihe soluble na mmiri. Uru pH enweghị mmetụta ọ bụla na arụmọrụ nke gua ethers. nke
(2) N'okpuru ọnọdụ nke viscosity dị ala na obere doses, guar gum nwere ike dochie cellulose ether na nha nha, ma nwee njigide mmiri yiri ya. Ma agbanwe agbanwe, mgbochi sag, thixotropy na ndị ọzọ na-doro anya ka mma. (3) N'okpuru ọnọdụ nke viscosity dị elu na usoro ọgwụgwọ dị elu, guar gum enweghị ike dochie cellulose ether, na ijikọta ngwakọta nke abụọ ahụ ga-emepụta arụmọrụ ka mma.
(4) Ngwa nke guar chịngọm na ngwa agha nke gypsum nwere ike belata nke ọma n'oge a na-ewu ụlọ ma mee ka ihe owuwu ahụ dị nro. Ọ nweghị mmetụta ọjọọ na ịtọ oge na ike nke ngwa agha gypsum. nke
(5) Mgbe a na-eji guar chịngọm na-eji ciment dabeere masonry na plasta ngwa agha, ọ nwere ike dochie cellulose ether na nha nha, na-enye ngwa agha na mma sagging iguzogide, thixotropy na ire ụtọ nke ewu. nke
(6) A pụkwara iji chịngọm chịngọm mee ihe na ngwaahịa ndị dị ka adhesives tile, ndị na-edozi onwe ha n'ala, putty na-eguzogide mmiri, na ụrọ polymer maka mkpuchi mgbidi. nke
(7) Ebe ọ bụ na ọnụ ahịa guar gum dị nnọọ ala karịa nke cellulose ether, iji guar gum na ngwa agha ga-ebelata ọnụ ahịa nhazi ngwaahịa. nke
Mgbanwe ịnweta mmiri na-ejigide thickener
A na-etinye akwa mmiri na-ejigide mmiri nke sitere na mineral eke sitere na mgbanwe na ngwakọta na China. Isi mineral ndị a na-eji akwadebe ihe ndị na-ejigide mmiri bụ: sepiolite, bentonite, montmorillonite, kaolin, wdg. mineral ndị a nwere ụfọdụ ihe na-ejigide mmiri na ihe na-eme ka mmiri sie ike site na mgbanwe dị ka ndị na-ejikọta ọnụ. Ụdị ihe mgbochi mmiri a na-etinye na ngwa agha nwere àgwà ndị a. nke
(1) Ọ nwere ike imeziwanye arụmọrụ nke ngwa agha nkịtị, ma dozie nsogbu nke adịghị arụ ọrụ nke ngwa ngwa ciment, ike dị ala nke ngwa agha agwakọta, na nguzogide mmiri na-adịghị mma. nke
(2) Enwere ike ịmepụta ngwaahịa ngwa ngwa nwere ọkwa ike dị iche iche maka ụlọ ọrụ mmepụta ihe na ụlọ obodo. nke
(3) Ọnụ ihe onwunwe dị ntakịrị karịa nke cellulose ether na starch ether.
(4) Njide mmiri dị ala karịa nke onye na-ahụ maka mmiri na-edozi mmiri, ọnụ ahịa nkụchi nke akọrọ nke ngwa ngwa a kwadebere dị ukwuu, na ịdị n'otu na-ebelata. nke
4. Ngwa nke starch ether
A na-ejikarị starch ether eme ihe na ngwa agha, nke nwere ike imetụta nkwụsị nke ngwa agha dabere na gypsum, ciment na lime, ma gbanwee ihe owuwu na sag resistance nke ngwa agha. A na-ejikarị ethers starch eme ihe na njikọ cellulose ethers na-adịghị agbanwe agbanwe na emezigharị. Ọ dabara maka sistemụ nnọpụiche na alkaline, yana dakọtara na ọtụtụ ihe mgbakwunye na ngwaahịa gypsum na ciment (dịka surfactants, MC, starch na polymers soluble mmiri dị ka polyvinyl acetate).
Isi atụmatụ:
(1) A na-ejikarị starch ether eme ihe na methyl cellulose ether, nke na-egosi mmetụta synergistic dị mma n'etiti abụọ ahụ. Ịgbakwunye ether starch kwesịrị ekwesị na methyl cellulose ether nwere ike imeziwanye nkwụsị nke sag na nkwụsị nke ngwa agha, na-enwe uru dị elu. nke
(2) Ịtinye ihe kwesịrị ekwesị nke starch ether na ngwa agha nwere methyl cellulose ether nwere ike ime ka ngwa ngwa na-agbanwe agbanwe nke ukwuu ma mee ka mmiri dịkwuo mma, na-eme ka ihe owuwu ahụ dịkwuo nro na nchacha ahụ dị nro. (3) Ịtinye ihe kwesịrị ekwesị nke starch ether na ngwa agha nwere methyl cellulose ether nwere ike ime ka njigide mmiri nke ngwa agha ahụ dịkwuo ogologo ma gbatịa oge oghere. nke
(4) Starch ether bụ starch ether soluble nke kemịkal na mmiri, dakọtara na mgbakwunye ndị ọzọ na ntụ ntụ ntụ, nke a na-ejikarị eme ihe na adhesives tile, na-arụzi ngwa agha, plasta plaster, ime na mputa mgbidi putty, gypsum dabeere na nkwonkwo na-ejuputa ihe. , interface mmadụ, masonry ngwa agha.
Njirimara nke starch ether kacha dabere na: ⑴imeziwanye nguzogide sag; ⑵ imeziwanye ihe owuwu; ⑶ ịba ụba ngwa ngwa, usoro a tụrụ aro: 0.03% ruo 0.05%.
Oge nzipu: Feb-16-2023