Nkume n'ezie na cellulose ether

A na-atụle mmetụta nke ego nke cellulose ether, ihe ndị ikwu molekul uka na mgbanwe usoro na mmiri na-amịkọrọ na na-acha ọcha onu nke ezigbo nkume agba na-atụle, na cellulose ether na kasị mma mmiri na-acha ọcha nguzogide nke ezigbo nkume agba na-ekpuchiri, na. A na-enyocha arụmọrụ zuru oke nke ezigbo nkume agba nchọpụta.

Isi okwu:ezigbo nkume agba; mgbochi mmiri na-acha ọcha; cellulose ether

0,Okwu mmalite

Ezigbo nkume varnish bụ ihe mkpuchi emulsion ájá sịntetik nke sitere na granite sitere n'okike, nkume a gwepịara egwepịa na ntụ ntụ dị ka mkpokọta, emulsion resin sịntetị dị ka ihe ndabere yana mgbakwunye dị iche iche. Ọ nwere ọdịdị na mmetụta ịchọ mma nke nkume eke. N'ime ọrụ ịchọ mma nke mpụga nke ụlọ elu dị elu, ọtụtụ ndị nwe ya na ndị na-ewu ụlọ na-akwado ya. Otú ọ dị, n'ụbọchị mmiri ozuzo, ntinye mmiri na ịcha ọcha aghọwo ihe dị njọ nke ezigbo nkume agba. Ọ bụ ezie na e nwere nnukwu ihe kpatara emulsion, mgbakwunye nke ọnụ ọgụgụ dị ukwuu nke ihe ndị dị na hydrophilic dị ka cellulose ether na-eme ka mmiri na-amịpụta mmiri nke ezigbo ihe nkiri agba nkume. N'ime ọmụmụ ihe a, site n'aka cellulose ether, a na-enyocha mmetụta nke ọnụ ọgụgụ cellulose ether, ịdị arọ molecular dị arọ na ụdị mgbanwe dị na mmiri na-amịpụta na ihe na-acha ọcha nke ezigbo nkume agba.

1. Usoro nke ntinye mmiri na ịcha ọcha nke ezigbo nkume agba

Mgbe a kpochapụrụ ihe mkpuchi nke nkume n'ezie, ọ na-adị mfe ịcha ọcha mgbe ọ na-ezute mmiri, karịsịa na mmalite nke ihicha (12h). Na ihu igwe mmiri ozuzo, mkpuchi ahụ ga-adị nro ma na-acha ọcha mgbe mmiri ozuzo sachara ya ogologo oge. Ihe mbụ kpatara ya bụ na emulsion na-amịkọrọ mmiri, nke abụọ bụ ihe na-akpata hydrophilic dị ka cellulose ether. Cellulose ether nwere ọrụ nke ndina na njigide mmiri. N'ihi ntinye nke macromolecules, ntinye nke ngwọta dị iche na nke mmiri Newtonian, ma na-egosi omume nke na-agbanwe na mgbanwe nke ike shear, ya bụ, ọ nwere nnukwu thixotropy. Meziwanye arụmọrụ ihe owuwu nke ezigbo nkume agba. Cellulose bụ nke mejupụtara D-glucopyranosyl (anhydroglucose), na usoro mkpụrụ ndụ ya dị mfe bụ (C6H10O5) n. A na-emepụta cellulose ether site na cellulose alcohol hydroxyl Group na alkyl halide ma ọ bụ ihe ndị ọzọ etherification n'okpuru ọnọdụ alkaline. Hydroxyethyl cellulose ether Ọdịdị, nkezi ọnụ ọgụgụ nke hydroxyl otu nọchiri anya reagents kwa anhydroglucose unit na cellulose molekul yinye ka a na-akpọ ogo nke nnọchi, 2, 3, na 6 hydroxyl otu niile na-anọchi, na kacha ogo nke nnọchi bụ 3. Otu hydroxyl n'efu na agbụ molekụla nke cellulose ether nwere ike imekọ ihe iji mepụta njikọ hydrogen, ma nwee ike iji mmiri na-emekọ ihe iji mepụta njikọ hydrogen. Mmiri mmiri na njigide mmiri nke cellulose ether nwere mmetụta kpọmkwem na ntinye mmiri na ịcha ọcha nke ezigbo nkume agba. Ntinye mmiri na njigide mmiri nke cellulose ether na-adabere n'ókè nke nnọchi nke cellulose, ihe ndị na-anọchi anya na ogo nke polymerization nke cellulose ether n'onwe ya.

2. Akụkụ nnwale

2.1 Ngwa na akụrụngwa nnwale

JFS-550 igwe na-arụ ọrụ dị iche iche maka mkpali na-adịgide adịgide, mgbasa ozi dị elu na igwe igwe: Shanghai Saijie Chemical Equipment Co., Ltd .; JJ2000B eletrọnịkị itule: Changshu Shuangjie Testing Instrument Factory; CMT-4200 igwe eletrọnịkị eluigwe na ala: Shenzhen Sansi Experimental Equipment Co., Ltd.

2.2 Usoro nnwale

2.3 Usoro nnwale

Tinye mmiri, defoamer, bactericide, antifreeze, ihe nkiri na-eme ihe enyemaka, cellulose, pH regulator na emulsion na disperser dị ka usoro iji gbasasịa nke ọma, tinyezie ájá na-acha agba ma kpalie nke ọma, wee jiri nha kwesịrị ekwesị nke thickener Gbanwee viscosity. , gbasasịa nke ọma, ma nweta ezigbo nkume agba.

Mee osisi ahụ na agba nkume n'ezie, ma mee nyocha mmiri na-acha ọcha mgbe ị gwọchara maka awa 12 (mikpu n'ime mmiri maka awa 4).

2.4 Nnwale arụmọrụ

Dị ka JG/T 24-2000 "Synthetic Resin Emulsion Sand Wall Paint", a na-eme ule arụmọrụ, na-elekwasị anya na mmiri na-acha ọcha na-eguzogide mmiri nke dị iche iche hydroxyethyl cellulose ether ezigbo nkume agba, na ndị ọzọ na-egosi teknụzụ ga-emezu ihe a chọrọ.

3. Nsonaazụ na mkparịta ụka

Dabere na njirimara arụmọrụ nke hydroxyethyl cellulose ether, a na-enyocha mmetụta nke ọnụọgụ nke hydroxyethyl cellulose ether, ịdị arọ molekul na usoro mgbanwe na nguzogide mmiri na-acha ọcha nke ezigbo nkume agba.

3.1 Mmetụta nke onunu ogwu

Site na mmụba nke ọnụ ọgụgụ nke hydroxyethyl cellulose ether, nguzogide mmiri na-acha ọcha nke ezigbo nkume agba na-eji nwayọọ nwayọọ na-akawanye njọ. Ọnụ ọgụgụ dị ukwuu nke cellulose ether, ka ọnụ ọgụgụ nke free hydroxyl otu, otú ahụ ka mmiri na-emepụta hydrogen bonds na ya, mmiri absorption ọnụego nke ezigbo nkume agba film ga-abawanye, na mmiri na-eguzogide ga-ebelata. Ka mmiri dị na ihe nkiri agba, ọ na-adị mfe ime ka ọ dị ọcha n'elu, ya mere mmiri na-eguzogide mmiri na-akawanye njọ.

3.2 Mmetụta nke mkpokọta molekul

Mgbe ọnụọgụ nke hydroxyethyl cellulose ethers nwere dị iche iche ikwu molekul uka bụ otu. Ka ibu ọnụ ọgụgụ molekụla dị ukwuu, nke na-akawanye njọ na mmiri na-acha ọcha nke ezigbo nkume agba, nke na-egosi na ịdị arọ molekụla nke hydroxyethyl cellulose ether nwere mmetụta na nguzogide mmiri na-acha ọcha nke ezigbo nkume agba. Nke a bụ n'ihi na njikọ kemịkalụ> njikọ hydrogen> van der Waals Force, ka ọnụọgụ mkpụrụ ndụ cellulose ether na-abawanye, ya bụ, ka ogo polymerization na-abawanye, ka njikọ kemịkalụ na-etolite site na nchikota nke nkeji glucose, na-abawanye ụba. ike mmekọrịta nke usoro dum mgbe ịmepụtara njikọ hydrogen na mmiri , na-esiwanye ike na ntinye mmiri na ike ijide mmiri, na-eme ka mmiri na-acha ọcha na-eguzogide mmiri nke ezigbo nkume agba.

3.3 Mmetụta nke usoro mgbanwe

Nsonaazụ ule na-egosi na mgbanwe nonionic hydrophobic dị mma karịa nke mbụ, na mgbanwe anionic bụ nke kachasị njọ. Na-abụghị ionic hydrophobically modified cellulose ether, site grafting hydrophobic otu na molekụla yinye nke cellulose ether. N'otu oge ahụ, a na-enweta nbibi nke usoro mmiri site na njikọ hydrogen nke mmiri na njikọ molecular chain. A na-ebelata arụmọrụ hydrophobic nke usoro ahụ, nke mere na arụ ọrụ hydrophobic nke ezigbo nkume agba na-eme ka ọ dịkwuo mma, na-eme ka mmiri na-acha ọcha na-eguzogide. A na-emezi cellulose ether anionically gbanwetụrụ site na cellulose na polyhydroxysilicate, nke na-eme ka arụ ọrụ nke ọma, ọrụ mgbochi sag na arụ ọrụ mgbochi splash nke cellulose ether, ma ionity ya siri ike, na ntinye mmiri na njigide na-eme ka ọ dịkwuo mma , Mmiri na-acha ọcha na-eguzogide ọgwụ. nke ezigbo nkume agba na-aghọ njọ.

4. Nkwubi okwu

Mmụba mmiri na ịcha ọcha nke ezigbo nkume agba na-emetụta ọtụtụ ihe dị ka ọnụọgụ cellulose ether na usoro mgbanwe nke ihe ndị dị na ya. Ntinye mmiri na ịcha ọcha nke ezigbo nkume agba.