Compounding and production of nano silver based NRLF The formulation used to make the silver nanocolloid
incorporated NRLF is shown in Table 1. First, LATZ type NRL was mixed with sulphur, antioxidant, previously prepared
silver nanocolloid and potassium oleate soap and stirred at 10 rpm. After 2 h, zinc 2-mercaptobenzhiozolate (ZMBT)
and zinc diethyldithiocarbamate (ZDEC) were slowly added to the mixture. Then, the compounded NRLF compound
was matured for 8 h at room temperature with continuous stirring at 10 rpm. After maturation, the NRLF compound was vigorously beaten using a stand mixer (KENWOOD, kMix) to make a fine foam until the volume was increased up to three
times (beating time about 5 min). After that, 3.00 pphr of ZnO together with 0.30 pphr of diphenylguanidine (DPG)
were added as the primary gelling agent to the foam and
beating was continued for another 90 s. Then, secondary
gelling agent, 1.00 pphr of sodium silicofluoride (SSF) was
quickly added and the foam was beaten for another 90 s.
Finally, the un-gelled foamwas immediately poured into an
aluminum mould and allowed to gel for 2 min at ambient
temperature. Gelled foam was then cured in a hot air oven
at 100 C for 2 h. Next, the cured foam was stripped from
the mould and thoroughly washed with de-ionized water
to remove soap and non-reacted elements. After washing,
the cured NRLF was dried in a hot air oven at 80 C for 8 h.
The resultant foam was off-white in color.
Compounding and production of nano silver based NRLF The formulation used to make the silver nanocolloidincorporated NRLF is shown in Table 1. First, LATZ type NRL was mixed with sulphur, antioxidant, previously preparedsilver nanocolloid and potassium oleate soap and stirred at 10 rpm. After 2 h, zinc 2-mercaptobenzhiozolate (ZMBT)and zinc diethyldithiocarbamate (ZDEC) were slowly added to the mixture. Then, the compounded NRLF compoundwas matured for 8 h at room temperature with continuous stirring at 10 rpm. After maturation, the NRLF compound was vigorously beaten using a stand mixer (KENWOOD, kMix) to make a fine foam until the volume was increased up to threetimes (beating time about 5 min). After that, 3.00 pphr of ZnO together with 0.30 pphr of diphenylguanidine (DPG)were added as the primary gelling agent to the foam andbeating was continued for another 90 s. Then, secondarygelling agent, 1.00 pphr of sodium silicofluoride (SSF) wasquickly added and the foam was beaten for another 90 s.Finally, the un-gelled foamwas immediately poured into analuminum mould and allowed to gel for 2 min at ambienttemperature. Gelled foam was then cured in a hot air ovenat 100 C for 2 h. Next, the cured foam was stripped fromthe mould and thoroughly washed with de-ionized waterto remove soap and non-reacted elements. After washing,the cured NRLF was dried in a hot air oven at 80 C for 8 h.The resultant foam was off-white in color.
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