akụkọ

Ụlọ ọrụ mkpuchi ụwa niile na-ahụ nnukwu mgbanwe gaa na usoro eji eme ihe mmiri, nke iwu gburugburu ebe obibi siri ike na nchegbu na-eto eto na-akwalite. Isi ihe dị na mgbanwe a bụ ọchịchọ maka agba ndị nwere arụmọrụ dị elu, carbon ojii apụtawokwa dị ka akụkụ dị mkpa. Agbanyeghị, imepụta mkpuchi mmiri nwere agba ojii miri emi na-eweta ihe ịma aka pụrụ iche, nke a bụkwa ebe obere viscosity carbon ojii na-abanye dị ka ihe na-agbanwe egwuregwu.

Mkpuchi mmiri na-ewu ewu nke ukwuu n'ihi obere ikuku VOC (Volatile Organic Compound) ha, ịdị mma gburugburu ebe obibi, na ịdị mfe nke nhicha. Ma, itinye carbon black nkịtị n'ime sistemụ ndị a na-edugakarị na mmụba nke mkpuchi, na-ebute enweghị ike ịgafe, nhazi ihe nkiri na-adịghị mma, na akara ahịhịa na-adịghị mma. Obere viscosity carbon black, ọkwa pụrụ iche e mepụtara iji dozie nsogbu ndị a, na-enye ngwọta nke na-ejikọta ọchịchịrị miri emi na ikike nhazi dị mma na sistemụ mmiri.

Uru kachasị dị na obere viscosity carbon ojii na mkpuchi mmiri bụ ikike ya ịnọgide na-enwe obere viscosity ọbụlagodi na nnukwu ibu. Black carbon nkịtị, yana oke elu ya na otu elu polar dị ka carboxyl na hydroxyl, na-emekọrịta nke ọma na molekul mmiri. Mmekọrịta a na-emepụta netwọk nke nwere ike okpukpu abụọ ma ọ bụ okpukpu atọ nke viscosity mkpuchi ahụ na obere ibu nke 2-3%. N'ụzọ dị iche, obere viscosity carbon ojii na-agbanwe elu site na iji surfactants na-abụghị ionic dị ka ethoxylated alcohols. Mgbanwe a na-ebelata mmekọrịta dị n'etiti mmiri na carbon black, na-ebelata njupụta chajị elu carbon black, yana ikike zeta nke na-adịkarị site na -20 ruo -30 mV (a tụrụ ya site na mgbasa ọkụ electrophoretic). N'ihi ya, a na-egbochi nhazi netwọk, na-ahụ na usoro mkpuchi dị nro ma na-agbanwe agbanwe.

Ihe atụ nke ezigbo ụwa sitere n'aka onye na-emepụta mkpuchi na United States na-egosi irè nke obere viscosity carbon black. Mgbe a nwalere ya na mkpuchi acrylic nke e ji mmiri mee na ibu 2.5%, viscosity nke mkpuchi ahụ nọgidere na 350-400 cP (Brookfield, 60 rpm). Ma e jiri ya tụnyere ya, otu mkpuchi ahụ nwere carbon black nkịtị nwere viscosity nke 800-900 cP. Mbelata dị ukwuu a na viscosity a gbanwere gaa na ngwa ahịhịa na roller dị nro, ebe ihe nkiri kpọrọ nkụ anaghị egosi akara ahịhịa a na-ahụ anya ma ọ bụ udidi nke peel oroma.

Nhazi ihe nkiri bụ akụkụ ọzọ dị mkpa ebe obere viscosity carbon ojii na-aka mma. Mkpuchi mmiri na-adabere na njikọta nke ihe ndị polymer n'oge usoro nkụcha iji mepụta ihe nkiri na-aga n'ihu, nke yiri otu. viscosity dị elu nwere ike imebi usoro a, na-ebute ntụpọ dịka oghere pin, mgbawa, ma ọ bụ njikọ na-adịghị mma. Mgbasa nke obere viscosity carbon ojii, nke a na-enyocha site na sedimentation centrifugal, na-eme ka ahụ hụ na obere viscosity carbon ojii anaghị egbochi njikọta nke obere polimetry. Ihe nkiri kpọrọ nkụ nwere obere carbon ojii a pụrụ iche na-egosipụta elu dị larịị, nke nwere uru siri ike (Ra) nke ≤0.5 μm (a tụrụ site na profilometry), yana nrapado siri ike na substrates. Dịka ọmụmaatụ, na simenti, ike nrapado pull-off nwere ike iru 6-8 MPa (ASTM D4541), ma e jiri ya tụnyere 4-5 MPa maka ihe nkiri nwere obere carbon ojii ọkọlọtọ. Na mkpuchi osisi dabere na mmiri, nhazi ihe nkiri dị nro ọ bụghị naanị na ọ na-eme ka mkpụrụ osisi ahụ dịkwuo mma kamakwa ọ na-enye mmecha siri ike, nke na-eguzogide ọkọ. Otu onye na-emepụta ngwá ụlọ kọrọ ezigbo ihe site na iji obere carbon ojii na-adịghị emerụ ahụ n'ime ihe mkpuchi osisi polyurethane nke e ji mmiri mee, ebe arịa ụlọ ndị e mechara gosipụtara agba na-egbuke egbuke, ọbụna oji nke na-eme ka mkpụrụ osisi ahụ pụta ìhè ma na-eguzogide ihe karịrị usoro nhicha 500 (ASTM D2486) na-enweghị ịcha ma ọ bụ bee.

Àgwà agba dịkwa mkpa n'ihe mkpuchi, obere viscosity carbon ojii na-enyekwa arụmọrụ pụrụ iche n'akụkụ a. Site na ike agba dị elu, nke na-abụkarị 100-110% ma e jiri ya tụnyere ọkọlọtọ carbon ojii (nke a tụrụ site na ASTM D2805), ọ nwere ike iru ọchịchịrị miri emi na obere ibu. Ibu nke 2-2.5% zuru oke iji ruo uru L* nke ≤12 (CIE Lab), na-emezu ihe achọrọ maka mma nke ihe mkpuchi ụlọ na ụlọ ọrụ mmepụta ihe. Nkesa nha obere nke obere viscosity carbon ojii, nke na-adịkarị n'etiti 20-30 nm, na-eme ka agba otu na-enweghị ụda dị n'okpuru na-achọghị, na-ezere agba aja aja ma ọ bụ acha anụnụ anụnụ nke nwere ike ime na ọkwa carbon ojii na-adịghị agbanwe agbanwe. Nnwale ihu igwe ngwa ngwa (ASTM G154) egosila na mkpuchi acrylic dabere na mmiri nwere obere viscosity carbon ojii na-ejide 80% nke agba mbụ ha (ΔE ≤2) mgbe awa 2000 nke ikpughe gasịrị, mkpuchi na-arụ ọrụ nke ọma na agba ojii organic, nke na-ejide naanị 60% nke agba ha. Nguzogide ihu igwe a pụrụ iche na-eme ka obere viscosity carbon ojii bụrụ nhọrọ zuru oke maka mkpuchi mmiri dị n'èzí, dịka agba mgbidi mpụta na ihe mkpuchi ígwè.

N'ime mmepụta na inye obere viscosity carbon ojii, njikwa mma na nkwado teknụzụ dị mkpa. Akara pụrụ iche e mere maka kemịkalụ mkpuchi dị iche iche dị. Akara ndị a na-ejigide ihe ndị dị n'ahụ na-agbanwe agbanwe, gụnyere mpaghara elu BET nke 200-240 m²/g, uru nnabata DBP nke 90-100 cm³/100g, na pH na-anọpụ iche nke 6.5-7.5 iji zere imetụta mkpuchi. Njikwa siri ike nke ọdịnaya ígwè dị arọ, yana lead ≤0.0005% na arsenic ≤0.0003%, na-ahụ na erube isi na ụkpụrụ gburugburu ebe obibi ụwa dịka LEED na Eurofins.

Ngwa ọrụ dị mkpa na usoro nnyefe nke obere viscosity carbon ojii. A na-eji akpa mmiri na-agbaze (25 kg/akpa) eme ihe iji mee ka mgbasa dị mfe na sistemụ mmiri, na-ewepụ mkpa ọ dị imepe akpa ma belata ihe ize ndụ nke uzuzu na mmetọ. Maka mmepụta buru ibu, enwere ike ịnweta akpa buru ibu nke kilogram 500 nke nwere valvụ mwepụ ala maka nri akpaaka. Site na netwọk mbupu zuru ụwa ọnụ nke na-ekpuchi ebe nrụpụta mkpuchi isi na Europe, Eshia, na South America, oge nnyefe sitere na ụbọchị 12-25. Ndị otu mgbe erechara ahịa na-enye nkwado n'ebe ahụ.

Oge ozi: Sep-04-2025