Cellulose ethers leboteng putty

Cellulose ether (hydroxypropyl methylcellulose, HPMC ka bokhutšoanyane) ke motsoako o tloaelehileng oa ho haha ​​​​ka hare ho lebota putty mme o bapala karolo ea bohlokoa ho putty. HPMC e nang le li-viscosity tse fapaneng e na le tšusumetso e kholo ts'ebetsong ea putty. Pampiri ena e ithuta ka mokhoa o hlophisehileng litlamorao le melao ea li-viscosity tse fapaneng tsa HPMC le litekanyetso tsa eona ts'ebetsong ea putty, 'me e lekola viscosity le litekanyetso tse nepahetseng tsa HPMC ka putty.

Mantsoe a bohlokoa: cellulose ether, viscosity, putty, tshebetso

0.Selelekela

Ka tsoelo-pele ea sechaba, batho ba labalabela ho phela sebakeng se setle sa ka tlung. Nakong ea mokhabiso, libaka tse kholo tsa marako li hloka ho hlajoa le ho kenngoa ka putty ho tlatsa likoti. Putty ke thepa ea bohlokoa haholo e tšehetsang mokhabiso. Kalafo e mpe ea putty e tla baka mathata a kang ho petsoha le ho phunya ha pente ea pente. Ho sebelisa litšila tsa indasteri le liminerale tse nang le porous tse nang le thepa ea ho hloekisa moea ho ithuta moaho o mocha oa tšireletso ea tikoloho putty e fetohile taba e chesang haholo. Hydroxypropyl methyl cellulose (Hydroxypropyl methyl cellulose, khutsufatso ea Senyesemane ke HPMC) ke sesebelisoa sa polymer se qhibilihang ka metsi, joalo ka motsoako o sebelisoang haholo bakeng sa kaho ea kaho, e na le ts'ebetso e ntle ea ho boloka metsi, e lelefatsa nako ea ho sebetsa le ho ntlafatsa ts'ebetso ea kaho, Ntlafatsa ts'ebetso ea ts'ebetso. . Ho ipapisitsoe le lipatlisiso tse fetileng tsa liteko, pampiri ena e lokiselitse mofuta oa lebota le ka hare la ts'ireletso ea tikoloho e nang le diatomite e le sesebelisoa sa mantlha se sebetsang, mme e ithutile ka mokhoa o hlophisehileng litlamorao tsa viscosity e fapaneng ea HPMC le palo ea putty ho hanyetsa metsi a putty, matla a bonding, qalong. ho omisa khanyetso ea mapetsong, ho sila Tšusumetso ea ho sebetsa, ho sebetsa le nako e omileng ka holim'a metsi.

1. Karolo ea teko

1.1 Leka lisebelisoa tse tala le lisebelisoa

1.1.1 Lisebelisoa tse tala

4 W-HPMC, 10 W-HPMC, le 20 W-HPMC cellulose ether le phofo ea rabara ea joala ea polyvinyl e sebelisoang tekong e fanoe ke Kima Chemical Co., Ltd; diatomite e fanoe ke Jilin Diatomite Company; khalsiamo e boima le phofo ea talcum E fanoe ke Shenyang SF Industrial Group; 32.5 R samente e tšoeu ea Portland e fanoe ke Yatai Cement Company.

1.1.2 Lisebelisoa tsa liteko

Mohlahlobi oa metsi a samente NLD-3; teko ea pele ea ho omisa anti-cracking BGD 597; bohlale bond matla tester HC-6000 C; ho kopanya le ho qhalakanya mochini o sebelisang merero e mengata BGD 750.

1.2 Mokhoa oa liteko

Mokhoa oa motheo oa tlhahlobo, ke hore, litaba tsa samente, k'halsiamo e boima, diatomite, phofo ea talcum le joala ea polyvinyl ke 40%, 20%, 30%, 6% le 4% ea boima bohle ba putty powder, ka ho latellana. . Litekanyetso tsa HPMC tse nang le li-viscosities tse tharo tse fapaneng ke 1‰, 2‰, 3‰, 4‰le 5‰ka ho latellana. Bakeng sa bonolo ba ho bapisa, botenya ba kaho ea putty single-pass bo laoloa ho 2 mm, 'me tekanyo ea ho atolosa e laoloa ho 170 mm ho ea ho 180 mm. Matšoao a ho lemoha ke a pele a ho omisa ho hanyetsa, matla a bond, ho hanyetsa metsi, thepa ea sanding, ho sebetsa le nako e omileng ka holim'a metsi.

2. Liphetho tsa liteko le lipuisano

2.1 Litlamorao tsa li-viscosities tse fapaneng tsa HPMC le litekanyetso tsa eona ho matla a bond ea putty

Ho tsoa ho liphetho tsa liteko le li-curve tsa matla a bond ea li-viscosities tse fapaneng tsa HPMC le litaba tsa eona ho putty.'s tlamo matla, ho ka bonoa hore putty'Matla a bond a eketseha pele ebe a fokotseha ka keketseho ea litaba tsa HPMC. Matla a bond a putty a na le tšusumetso e kholo ka ho fetisisa, e eketsehang ho tloha 0.39 MPa ha litaba li le 1.‰ho 0.48 MPa ha litaba li le 3‰. Sena ke hobane ha HPMC e qhalakanngoa ka metsing, cellulose ether ka metsing e ruruha ka potlako 'me e kopanya le phofo ea rabara, e kopantsoeng le e' ngoe, 'me sehlahisoa sa samente sa hydration se pota-potiloe ke filimi ena ea polymer ho etsa karolo ea motsoako oa matrix, o etsang putty bond Matla a eketseha, empa ha palo ea HPMC e le kholo haholo kapa viscosity e phahame haholo kapa e le tlase haholo, filimi ea polymer e entsoeng pakeng tsa HPMC le likaroloana tsa samente e na le phello ea ho tiisa, e fokotsang matla a tlamahano ea putty.

2.2 Liphello tsa li-viscosities tse fapaneng tsa HPMC le litaba tsa eona nakong e omileng ea putty

E ka bonoa ho tsoa liphethong tsa liteko tsa li-viscosities tse fapaneng tsa HPMC le litekanyetso tsa eona nakong ea ho omisa ea putty le nako ea ho omisa ka holim'a metsi. Ha viscosity ea HPMC e le kholoanyane le ho feta tekanyo, nako e telele ea ho omisa holim'a putty. /T298-2010), nako e omileng ea bokaholimo ba lebota la ka hare e ke ke ea feta 120 min, mme ha litaba tsa 10 W.-HPMC e feta 4‰, le litaba tsa 20 W-HPMC e feta 3‰, nako e omileng ea holim'a putty e feta litlhoko tse boletsoeng. Sena ke hobane HPMC e na le phello e ntle ea ho boloka metsi. Ha HPMC e kopantsoe le putty, limolek'hule tsa metsi le lihlopha tsa hydrophilic tse sebopeho sa limolek'hule tsa HPMC li ka kopana ho hlahisa li-bubble tse nyane. Li-bubble tsena li na le phello ea "rolara", e leng molemo ho putty batching Ka mor'a hore putty e be thata, li-bubble tse ling tsa moea li ntse li le teng ho etsa li-pores tse ikemetseng, tse thibelang metsi hore a se ke a fetoha mouoane ka potlako le ho lelefatsa nako ea ho omisa holim'a putty. 'Me ha HPMC e kopantsoe le putty, lihlahisoa tsa hydroxide tse kang calcium hydroxide le CSH gel ka samente li khabisoa ka limolek'hule tsa HPMC, tse eketsang viscosity ea tharollo ea pore, ho fokotsa motsamao oa li-ion ka tharollo ea pore, le ho lieha ho eketsehileng. mokhoa oa samente hydration.

2.3 Liphello tsa li-viscosities tse fapaneng tsa HPMC le litekanyetso tsa eona ho thepa e meng ea putty

E ka bonoa ho tsoa liphethong tsa liteko tsa tšusumetso ea li-viscosity tse fapaneng tsa HPMC le palo ea putty linthong tse ling tsa putty. Ho eketsoa ha HPMC e nang le li-viscosities tse fapaneng ho etsa hore ho omisoa ha pele ho hanyetsane, ho hanyetsa metsi le ts'ebetso ea sanding ea putty e tloaelehileng, empa ka keketseho ea palo ea HPMC, ts'ebetso e mpe ea kaho. Ka lebaka la phello e matla ea HPMC, litaba tse ngata haholo li tla eketsa ho tsitsa ha putty, e leng ho tla etsa hore ho be thata ho senya putty le ho senya ts'ebetso ea kaho.

3. Qetello

(1) Matla a kopaneng a putty a eketseha pele ebe a fokotseha ka keketseho ea litaba tsa HPMC, mme matla a kopaneng a putty a ameha haholo ha litaba tsa 10 W-HPMC li le 3.‰.

(2) Ha ho na le viscosity e kholo ea HPMC le ha litaba li ntse li le ngata, nako e telele ea ho omisa holim'a putty. Ha litaba tsa 10 W-HPMC li feta 4‰, mme litaba tsa 20 W-HPMC li feta 3‰, nako ea ho omisa holim'a putty e telele haholo 'me ha e finyelle maemo. Hloka.

(3) Ho eketsa li-viscosity tse fapaneng tsa HPMC ho etsa hore ho hanyetsa ha metsi ho omisoe ka lekhetlo la pele, ho hanyetsa metsi le ts'ebetso ea lehlabathe ea putty e tloaelehileng, empa ka keketseho ea litaba tsa eona, ts'ebetso ea kaho e mpefala. Ha ho nahanoa ka botlalo, ts'ebetso ea putty e kopantsoeng le 3‰10 W-HPMC ke eona e molemo ka ho fetisisa.